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D-1

D

INTERCEPTOR 147 2 Mbit/s and Data Analyzer

Understanding G.821 Performance Analysis

UNDERSTANDING G.821

PERFORMANCE ANALYSIS

D.1

WHY CCITT G.821 PERFORMANCE
ANALYSIS?

This appendix discusses the criteria for performance
analysis, the concept of available time versus unavailable
time, and degraded minutes as specified in CCITT
Recommendation G.821.  This discussion is provided to
familiarize users with the G.821 Performance results.

D.2

PERFORMANCE ANALYSIS
RESULTS

The performance results (available in the INTERCEPTOR
147’s PERFORMANCE results category) are derived by
observing the received bit error counts and received bit
counts at 1-second intervals, and classifying each 1-
second interval as available, unavailable, severely errored,
or error free seconds.  This division of test time is illustrated
in Figure D-1.  Further calculations yield the number and
percentage of degraded minutes, and percentages of
available, severely errored, and error free seconds.

Figure D-1

Division of Test Seconds for Performance

Analysis

AVAILABLE SECONDS

NON-SEVERELY

ERRORED
SECONDS

SEVERELY

ERRORED
SECONDS

UNAVAILABLE SECONDS

TOTAL TEST TIME

FROM INITIAL SYNCHRONIZATION

Summary of Contents for interceptor 147

Page 1: ...chniques Corporation 20400 Observation Drive Germantown Maryland 20876 800 638 2049 or 301 353 1550 MD FAX 301 353 9216 or contact your local distributor 50 13139 01 Rev B TM 2 Mbit s and Data Analyzer Reference Manual APRIL 1995 ...

Page 2: ...Specifications terms and conditions are subject to change without notice ...

Page 3: ... INITIAL CHECK OUT PROCEDURE 1 6 1 8 BASIC SETUP PROCEDURE 1 8 INSTRUMENT DESCRIPTION 2 1 2 1 OVERVIEW 2 1 2 2 TRANSMITTER 2 4 2 3 STATUS DATA INTERFACE 2 5 2 4 EXTERNAL CLOCK 2 7 2 5 DATA INTERFACE SIGNALING LEDS 2 7 2 6 DATA INTERFACE CONNECTORS 2 8 2 7 STATUS ALARMS 2 10 2 8 RECEIVER 2 13 2 9 MISCELLANEOUS CONTROLS AND LEDS 2 16 2 10 DISPLAY SCROLL CURSOR SELECT 2 18 2 11 SETUP 2 19 2 12 RESULT...

Page 4: ...ULTS 4 2 4 4 SIGNAL CODE FAS RESULTS 4 5 4 5 CHAN SIGNALING RESULTS 4 10 4 6 PERFORMANCE RESULTS 4 12 USING A PRINTER 5 1 5 1 OVERVIEW 5 1 5 2 CONTROLS PRINT 5 2 5 3 RESULTS PRINT 5 2 5 4 AUTO PRINT TIMED 5 4 5 5 AUTO PRINT EVENT 5 5 5 6 HISTOGRAM PRINT 5 6 5 7 PRINTER SETUP 5 10 REMOTE CONTROL 6 1 6 1 OVERVIEW 6 1 6 2 REMOTE CONTROL OPERATION 6 2 6 3 COMMANDS AND QUERIES 6 3 6 4 ERROR MESSAGES 6 ...

Page 5: ...DATA INTERFACE 7 19 7 10 TESTING MULTIPLEXED DATA TO 2048 KBIT S CIRCUITS 7 21 7 11 TESTING DEMULTIPLEXED 2048 KBIT S TO DATA CIRCUITS 7 24 7 12 NOTES REGARDING ROUND TRIP DELAY 7 24 SPECIFICATIONS 8 1 8 1 2 MBIT S OPERATING MODES 8 1 8 2 V 11 DATA INTERFACE 8 5 8 3 V 35 DATA INTERFACE 8 5 8 4 X 21 DATA INTERFACE 8 6 8 5 V 24 DATA INTERFACE 8 6 8 6 CODIRECTIONAL 64 KBIT S G 703 INTERFACE 8 7 8 7 P...

Page 6: ...ERATION C 1 C 2 QUEUE AND BUFFER OPERATION C 3 C 3 STATUS BYTE REGISTER GROUP C 3 C 4 EVENT STATUS REGISTER GROUP C 6 C 5 TEST SUMMARY REGISTER GROUP C 8 C 6 LINE STATUS REGISTER GROUP C 9 C 7 ALARM STATUS REGISTER GROUP C 12 UNDERSTANDING G 821 PERFORMANCE ANALYSIS D 1 D 1 WHY CCITT G 821 PERFORMANCE ANALYSIS D 1 D 2 PERFORMANCE ANALYSIS RESULTS D 1 D 3 DETERMINING AVAILABLE AND UNAVAILABLE SECON...

Page 7: ...BLESHOOTING AN NX56 OR NX64 KBIT S CIRCUIT 7 10 7 5 TROUBLESHOOTING A CUSTOMER S NX64K SERVICE 7 12 7 6 MONITORING A 2 MBIT S CIRCUIT FROM A DS3 ACCESS POINT 7 15 7 7 PERFORMING A BIT SLIP OR FRAME SLIP TEST 7 17 7 8 TESTING DATA CIRCUITS 7 19 7 9 TESTING MULTIPLEXED 2 MBIT S TO DATA CIRCUITS 7 21 7 10 TESTING DEMULTIPLEXED 2 MBIT S TO DATA CIRCUITS 7 24 B 1 DCE TO DTE INTERFACE DIAGRAM B 2 B 2 DT...

Page 8: ...DOW AFTER 160TH TEST SECOND TRANSITION TO AVAILABLE TIME D 5 E 1 SAMPLE HISTOGRAM GRAPH E 1 E 2 TWO RESULTS BARS E 5 E 3 SAMPLE LIST HISTOGRAM PRINT E 6 TABLE 3 1 TEST MODE CATEGORY 3 2 3 2 CONFIGURATION CATEGORY 3 8 3 3 TIMESLOTS CATEGORY 3 29 3 4 ALARM SIGNAL CATEGORY 3 34 3 5 AUXILIARY CATEGORY 3 38 B 1 V 24 DCE CROSSOVER CABLE PIN ASSIGNMENTS B 3 B 2 V 11 DCE CROSSOVER CABLE PIN ASSIGNMENTS B ...

Page 9: ...front panel see Section 2 Instrument Description To set up to test a digital communications circuit see Section 3 Setup Categories As you conduct a test the test instrument provides a number of test results that provide information about the circuit under test For information about the test results see Section 4 Test Results In addition to performing the tests and viewing the results you can also ...

Page 10: ... s mode Measures round trip delay Provides a 16K test mode Transmits NTPM LEPM and programmable ISDN Sa6 loop codes Displays and prints Sa6 messages Generates frequencies from 50 bit s to 2 048 Mbit s Transmits and displays Transmic 2G C Bit loop codes PerformsM 2100in serviceperformanceanalysis Provides remote control commands for remote operation Stores and recalls setup configuration Storesandp...

Page 11: ...g of multiplexers and Network Terminating Equipment NTE Testing 2 Mbit s Nx64 and Mx64 circuits for timing related problems with Option 147 1 installed Stress testing equipment 1 2 OPTIONS FOR THE INTERCEPTOR 147 Options for the test instrument are available to provide additional functionality Currently the following option is available Option 147 1 Timing Analysis Option TheTimingAnalysisoptional...

Page 12: ...amage If the container is damaged keep the container until the contents of the shipment have been checked for completeness seeSection1 5andthepackinglistincluded in the shipment and the test instrument has been checked physically and operationally see Section 1 7 If the shipment is incomplete or damaged or if the test instrument does not pass its operational test keep the shippingcontainerandpacka...

Page 13: ...cid battery When fully charged the battery can power the instrument for 3 to 6 hours depending on test configuration The test instrument can also operate using AC Mains power To connect to AC Mains power use the AC Mains poweradapter whichissuppliedwitheachtestinstrument Torechargetheinternalbattery connectthetestinstrument toACMainspower Whilethetestinstrumentisconnected toACMainspower batterycha...

Page 14: ...strument 1 Press POWER to turn on the INTERCEPTOR 147 Verify that the following steps occur The Liquid Crystal Display LCD performs its power on test for about 2 seconds All Light Emitting Diodes LEDs illuminate for about one second The 2M TX POWER OFF LED illuminates only briefly The current software revision appears in the LCD for a few seconds The LCD back light switches on and remainson TheLCD...

Page 15: ...or under the current Pattern selection atthispointitshouldbeAUTO Then press the SELECT up or down control until Pattern is set to 2 23 1 7 Select the AUXILIARY setup category Verify Tx Coding is set to HDB3 8 Verify the appropriate Status LEDs are on Green SIGNAL FASSYNC MFASSYNC and PATTERN SYNC Yellow CRC 4 9 Select the SUMMARY Results category Press RESULTS until the LED illuminates for the SUM...

Page 16: ...f your test instrument does not pass this operational test contact TTC Customer Service see Section 9 4 1 8 BASIC SETUP PROCEDURE Setting up the test instrument to perform circuit analysis is facilitated by the easy to use front panel and display categories Followingisatypicalsequenceofstepstouseinsettingup the test instrument to perform a test 1 Turn off PANEL LOCK Before beginning any test instr...

Page 17: ...r categories and items This feature makes setup simpler and faster 3 Turn off SELF LOOP Verify the SELF LOOP LED is off Unless you areperformingaself checkofthetestinstrument SELF LOOP should always be off 4 Turn off ERROR INSERT If you do not want to generate errors verify the ERROR INSERT LED is off 5 Select the 2 Mbit s RECEIVER input mode For 2 Mbit s testing only use the RECEIVER controltosel...

Page 18: ...he circuit Connect the circuit under test to the test instrument s RECEIVER and TRANSMITTER as applicable 7 Press RESTART to begin a test To restart that is start a new test press RESTART A new test is also begun when you change certain test setup configurations such as changing test mode ...

Page 19: ... test and to peripheral devices LEDs that illuminate to provide information Controls that you press to initiate an action For a view of the front panel see Figures 2 1 and 2 2 The left side of the test instrument primarily includes items regarding the 2 Mbit s transmitter and the Data communications interfaces The right side of the test instrument includes items regarding the 2 Mbit s receiver as ...

Page 20: ...F STATUS DATA INTERFACE TRANSMIT RECEIVE 2M 64K G 703 V 35 X 21 V 11 V 24 EMULATE DTE EMULATE DCE CCITT V 11 X 21 V 24 V 35 106 107 109 142 CS DM RR TM CTS DSR RLSD TM CCITT 105 108 141 140 RS TR LL RL RTS DTR LL RL USE WITH DCE CABLE ADAPTER V 24 V 11 V 35 64K G 703 X 21 INTERCEPTOR 147 DATA INTERFACE V 11 X 21 V 24 V 35 Figure 2 1 INTERCEPTOR 147 Left Side ...

Page 21: ...ORY RESET RECEIVER MON TERM BRIDGE 120 Ω 75 Ω 120 Ω 75 Ω PANEL LOCK BATTERY LOW RESTART DISPLAY HOLD CURSOR SCROLL SELECT TEST MODE CONFIGURATION TIMESLOTS ALARM SIGNAL AUXILIARY SUMMARY LOGIC TIME SIGNAL CODE FAS CHAN SIGNALING PERFORMANCE SETUP RESULTS VOLUME CONTROLS POWER PRINTER RESULTS CLEAR Tclccommunications Tcchniqucs Corporation R A DYNATECH COMPANY EXPECT EXCELLENCE Figure 2 2 INTERCEPT...

Page 22: ...nbalanced 2 Mbit s interfaces For information regarding Data transmitter connectors see Section 2 6 Data Interface Connectors 2M TX POWER OFF The 2M TX POWER OFF 2 Mbit s Transmitter Power Off LED illuminates when the 2 Mbit s Transmitter is off See the Transmitter item in the CONFIGURATION Setup category Less power is consumed and therefore the battery will last longer when the Transmitter is tur...

Page 23: ...INSERT until the LED illuminates To stop inserting errors press ERROR INSERT again so that the LED extinguishes 2 3 STATUS DATA INTERFACE The LEDs in the left TRANSMIT column illuminate to indicate which interface is being used on the transmit side The LEDs in the right RECEIVE column illuminate to indicate which interface is being used on the receive side Following are some examples showing which...

Page 24: ... DATA Intf is set to V 11 Performing a Demultiplex Test In this example you are testing a circuitwheretheINTERCEPTOR 147 s transmit side is a 2 Mbit s circuit and the receive side is a DatacircuitwithanX 21interface Setup Test is set to DEMUX TX RX is set to 2M DATA Intf is et to X 21 STATUS DATA INTERFACE TRANSMIT RECEIVE 2M 64K G 703 V 35 X 21 V 11 V 24 STATUS DATA INTERFACE TRANSMIT RECEIVE 2M ...

Page 25: ...under test for slip measurements NOTE The EXTERNAL CLOCK connector is present only if Option 147 1 is installed 2 5 DATA INTERFACE SIGNALING LEDS When you perform a Data test the DATA INTERFACE LEDs illuminate to indicate whether the test instrument is configured to emulate a DTE or a DCE and to indicate which control signals are active on the receive side For X 21 the C lead is indicated by the R...

Page 26: ...o V 24 data interfaces Use the 50 pin D type interface connector to connect to V 11 V 35 and 64 kbit s G 703 codirectional interfaces Use the 15 pin X 21 interface connector to connect to X 21 data interfaces For information regarding what information is carried on each of the pins for each of the interfaces see Appendix B Use the appropriate cable to connect the test instrument to the circuit und...

Page 27: ... V 24 DCE crossover cable model 31365 X 21 DTE Standard X 21 DTE cable such as TTC s model 31271 cable X 21 DCE TTC s X 21 DCE crossover cable model 31366 V 11 DTE TTC s V 11 DTE adapter cable model 42892 V 11 DCE TTC s V 11 DCE crossover cable model 42941 V 35 DTE TTC s V 35 DTE adapter cable model 42895 V 35 DCE TTC s V 35 DCE crossover cable model 42942 Co directional TTC s G 703 adapter 64K G ...

Page 28: ...received or a positive condition has been lost STATUS ALARMS SIGNAL FAS SYNC MFAS SYNC PATTERN SYNC PATTERN INVERT CRC 4 OCTET TIMING AIS TS 16 AIS FAS DISTANT MFAS DISTANT PATTERN SLIP HISTORY RESET History LEDs are red The current LEDs illuminate to indicate present conditions Additional Status LEDs yellow The history LEDs illuminate to indicate past conditions Alarm LEDs red Normal Status LEDs ...

Page 29: ...GNAL In a 2M test the green current status SIGNAL LED illuminateswhenthetestinstrumentdetectsavalidreceived 2 Mbit s signal In a Data test the green current status SIGNAL LED illuminateswhenthetestinstrumentdetectsclockpresence In a 2M test the red history SIGNAL LED illuminates when after detecting a valid received 2 Mbit s signal the signal is lost The history LED remains illuminated even after ...

Page 30: ...hronization with the CRC Cyclic Redundancy Check bit sequence OCTET TIMING The OCTET TIMING LED illuminates when octet timing is detected when receiving a 64 kbit s G 703 codirectional signal AIS The AIS Alarm Indication Signal LED illuminates when the receiver detects AIS unframed all 1 s TS16 AIS The TS16 AIS Timeslot 16 Alarm Indication Signal LED illuminates when the receiver detects TS16 AIS ...

Page 31: ...onnect system DCS or higher order multiplexer experiencesacontrolledoruncontrolledtimingslip Pattern slip monitoring is a useful tool for detecting and troubleshooting network timing problems HISTORY RESET The Status and Alarms section also includes a HISTORY RESET control Press HISTORY RESET to extinguish the history LEDs 2 8 RECEIVER The RECEIVER section pertains to the testing of 2 Mbit s signa...

Page 32: ...NC or an optional 1 6 5 6 mm connector to the circuit under test 2 8 2 Receiver Control and LEDs Use the control in the RECEIVER section to select the Receiver mode and circuit impedance Press the control untiltheLEDsilluminatefortheappropriatemode MON TERM or BRIDGE and circuit impedance 75Ω or 120Ω MON Monitor Use MON Monitor mode to monitor a 2 Mbit s signal such as when you are performing in s...

Page 33: ...rminate mode to terminate the circuit at the test instrument such as when you are performing out of servicetestsona2 048Mbit slinkatG 703 compatible points 2 048 Mbit s Link Digital Network 2 048 Mbit s Line Section 2 048 Mbit s Interface INTERCEPTOR 147 TX RX 2 048 Mbit s Link Digital Network 2 048 Mbit s Line Section TERM INTERCEPTOR 147 TX RX 2 048 Mbit s Interface ...

Page 34: ...strated below With BRIDGE mode the test instrument provides an input impedance of greater than 1000Ω and provides automatic cable equalization so that the testing will not affect the circuit under test 2 9 MISCELLANEOUS CONTROLS AND LEDS Below the RECEIVER section are the BATTERY LOW LED thePANELLOCKcontrolandLED theRESTART control and the DISPLAY HOLD control and LED BATTERY LOW LED The BATTERY L...

Page 35: ...en the panel is locked To unlock the panel hold down PANEL LOCK until the LED extinguishes RESTART When all setup selections have been made and the test instrument is properly connected to the circuit under test press RESTART to start a new test Starting a new test clears accumulated test results clears any errors detected during the connection process and begins a new test period DISPLAY HOLD Con...

Page 36: ...display when there is more to see above or below the current items displayed To control the display use the following controls SCROLL Up and Down Press the SCROLL up or down control to scroll up or down the display a page at a time CURSOR Up Down Left and Right PresstheappropriateCURSORcontroltomovethecursor flashing box up down left or right within the display SELECT Up and Down To change the sel...

Page 37: ...SETUP categories see the section on Setup Categories 2 12 RESULTS PressRESULTStoselectoneoftheRESULTScategories The LED next to the selected RESULTS category illuminates Repeatedly press RESULTS to scroll from one RESULTS category to the next When you select one of the RESULTS categories the test results in that category are displayed in the Display For information about the items in the RESULTS c...

Page 38: ...ry To increase the speaker volume press the VOLUME up control To decrease the speaker volume press the VOLUME down control When you press the VOLUME up or down control the Display temporarily displays a graphical depiction of the volume level The blackened box indicates the current volume level from OFF to maximum loudness as you press one of the VOLUME controls the blackened box moves to illustra...

Page 39: ...d printouts PRINTER RESULTS Control To prepare a Results Print press PRINTER RESULTS If a printer is properly connected the Print will be printed If a printer is not connected the Print is stored in the Print Buffer For more information about Results Prints see Section 5 Using a Printer PRINTER CONTROLS Control ToprepareaControlsPrint pressPRINTERCONTROLS If a printer is properly connected the pri...

Page 40: ...r To recharge the test instrument s battery or to operate on AC Mains versus battery power plug one end of the AC Mains Power Adapter into the 9V DC connector and connect the other end of the adapter into an AC Mains power source The test instrument can remain connected toACMainspowerindefinitely thebatterycannotbecome overcharged WARNING Use the TTC supplied AC Mains Power Adapter Use only the TT...

Page 41: ...nter Remote Control cable into the PRINTER REMOTE CONTROL connector and plug the other end into the printer or remote controller NOTE Since the same PRINTER REMOTE CONTROL connector is used for connecting to a printer or a remote controller you cannot use both a printer and a remote controller at the same time For information about connecting and using a printer see Section 5 Using a Printer For i...

Page 42: ...Instrument Description 2 24 2 INTERCEPTOR 147 2 Mbit s and Data Analyzer ...

Page 43: ...ceed to the CONFIGURATION category and so on To automatically simplify setup items in each category are displayed only if they are applicable depending on previous setup selections For example if transmitter power is turned off then any item having to do with the transmitter such as the Tx Clock and Tx Alarm are not displayed To select the category you want to view press SETUP Then press SCROLL or...

Page 44: ...DE and other categories Below is an example setup for the TEST MODE category In this example Test is set to 2M As a result the remaininglinesarethosethatapplyin2Mtestingsituations Test 2M Test Mode Nx64K Channel NORMAL Chan Rate 64Kbps For a summary of the TEST MODE items see Table 3 1 TEST MODE item descriptions begin after the table Table 3 1 TEST MODE Category Item Selections Test 2M DATA MUX T...

Page 45: ... test on a data circuit and a 2 Mbit s circuit NOTE WhenTestissettoMUX thetestinstrument is automatically configured as a DTE For more information see Emulate in the CONFIGURATION category 3 2 2 Test Mode When you are testing a 2 Mbit s circuit use the Test Mode item to specify whether you want to test the entire 2 Mbit s circuitorjustaportionofthe2Mbit scircuit forexample a single timeslot or mor...

Page 46: ...yinsertedintotheselectedtimeslot of the transmitted signal 64K Select 64K to perform tests on an individual 64 or 56 kbit s timeslot in a 2 Mbit s circuit Nx64K Select Nx64K for tests on a circuit composed of N contiguous 64 or 56 kbit s timeslots in a 2 Mbit s circuit Mx64K Select Mx64K for tests on M non contiguous 64 or 56 kbit s timeslots in a 2 Mbit s circuit For all Test Mode selections exce...

Page 47: ... eight bits are used to represent each sample and therefore the channel rate is 64 kbit s 8 x 8 000 bit s In the case of restricted operation however the last bit of every byte is set to 1 Therefore only seven bits are available to encode each sample and the channel rate is 56 kbit s 7 x 8 000 bit s The following Channel selections are available NORMAL SelectNORMALtotestanormalbandwidth 64 kbit s ...

Page 48: ... 2 Mbit s signal 3 2 5 Intf The Intf Interface item is used to specify the type of interface being used on the data circuit The following interface selections are available 64k G 703 For testing a 64 kbit s G 703 codirectional data communications interface V 35 V 35interface V 35 306 FortestingaV 35interface X 21 For testing at an X 21 interface V 11 For testing at a V 11 interface V 24 SYNC Forte...

Page 49: ... N contiguous 64 kbit s timeslots in a 2 Mbit s link Mx64K Select Mx64K to perform tests on M non contiguous 64 kbit s timeslots in a 2 Mbit s link 56K Select 56K to perform tests on an individual 56 kbit s timeslot in a 2 Mbit s link Nx56K Select Nx56K to perform tests on N contiguous 56 kbit s timeslots in a 2 Mbit s link Mx56K Select Mx56K to perform tests on M non contiguous 56 kbit s timeslot...

Page 50: ...esired setting Below is an example of a CONFIGURATION setup In this example Test is set to 2M Transmitter OFF Framing MFAS Pattern 2 15 1 For a summary of the CONFIGURATION items see Table 3 2 For descriptions of the CONFIGURATION category items see the subsections following the Table Table 3 2 CONFIGURATION Category Item Available Selections Transmitter ON or OFF Thru Mode ON or OFF Framing AUTO ...

Page 51: ...plays the bit name and TX status in text form CBIT Word Displays and allows editing of the C Bit word in the form F0000111100000 CBIT MODE EDIT or SEND Transmits last selected C Bits when in EDIT mode Pattern AUTO MARK SPACE 1 1 1 3 1 4 2 6 1 2 9 1 2 11 1 2 15 1 2 20 1 2 23 1QRSS TS BYTE PRGM DELAY or FOX Program A 1 to 24 bit Pattern word that can Pattern be edited bit by bit See the text for det...

Page 52: ...eps Rcv Clk Sel ST or TT Send Clk Pol NORM or INV Rcv Clk Pol NORM or INV V 24A Parity NONE ODD or EVEN V 24A BITS 8 7 6 or 5 V 24A STOP 1 5 or 1 V 24A BITS 5 2 or 1 V 24A BITS 6 7 or 8 Octet Timing ON or OFF V 11 T U TERM or UNTERM Data Lead RTS ON OFF RS ON OFF ON OFF CTS CS ON OFF ON OFF DSR DM ON OFF ON OFF RLSD RR ON OFF ON OFF RL LL ON OFF ON OFF TM Gen Clk INTRNL or INTF ...

Page 53: ...t to OFF the test instrument uses less power and therefore the battery lasts longer 3 3 2 Thru Mode Use the Thru Mode item to turn Thru Mode on or off Thru Mode allows you to insert a test pattern on selected timeslots without affecting traffic on the remaining timeslots The following selections are available for Thru Mode ON WhenThruModeissettoON thelivetrafficreceived is passed through without a...

Page 54: ...raming format detected in the received signal If the test instrument cannot achieve frame synchronization by setting framing to MFAS CRC MFAS FAS CRC or FAS then the framing defaults to UNFRAMED if Test Mode is set to 2048K or otherwise to FAS To determine which type of framingwasdetected checktheLEDsintheSTATUS ALARM section Whentheautomaticframesynchronizationprocessis complete the framing remai...

Page 55: ... transmission of the FAS and NFAS FAS CRC Configures the test instrument to operate using the FAS CRC framing format This format is identical to the FAS format except that a 4 bit cyclic redundancy check CRC 4 code is added The CRC 4 code is insertedintothefirstbitofTimeslot0inodd numbered frames MFAS Configures the test instrument to operate using the Multiframe Alignment Signal MFAS framing form...

Page 56: ...s OFF the E bits are ignored The following selections are available for REBE as indicated ON Whenina2Mbit smodewithCRCsettoON REBEs arecountedanddisplayed IfacircuitwithoutREBEs is tested with REBEs set to ON an erroneous REBE count may be displayed OFF REBEs are not counted or displayed 3 3 5 Tx Clock Use the Tx Clock item to specify the clock source used by the transmitter The INTERNAL or INT 20...

Page 57: ...uency is set from 20 000 parts per million ppm above to 20 000 ppm below the frequencyofthetestinstrument sinternal2 048MHz oscillator in 1 ppm steps This selection is available when Option 147 1 is installed 3 3 6 PPM Use the PPM item to set the frequency offset from 20 000 ppm to 20 000 ppm in 1 ppm steps The setting is only applied when the TX Clock item is set to PPM This item is available whe...

Page 58: ...s required This selection provides a 75Ω input impedance for the 2M Ref Input signal 3 3 8 TS Idle Use the TS Idle item to specify the pattern used in unselected timeslots The format of the TS Idle item is TS Idle bbbbbbbb where bbbbbbbb is an 8 bit byte that you can specify Tospecifyeachbit representedbya b movethecursor to the bit you want to change and press SELECT to change a 1 to a 0 or a 0 t...

Page 59: ...ansmission in the Sa6 bitmessage RefertotheSa6bitsitemforinformation on the available loop codes CBITS Selects the Transmic 2G loop codes for transmission 3 3 10 SA6BITS Use the SA6BITS item to specify the Sa6 loop code type to be transmitted The Sa6 loop codes are applicable in the 2M framed 2M Voice 2M Nx64k 56k 2M Mx64k 56k and 2M 64k 56k setup when the 2M Transmitter is ON The following select...

Page 60: ...inations 0000 0001 0011 1010 1110 and 1111 3 3 12 CBIT Use the CBIT item to display the number of the C Bit that has been selected 3 3 13 CBIT Status Use the CBIT Status item to display C Bit name and transmission status in text form as follows Bit Function Description 1 C Bit Frame Alternating 1 0 1 Sync Locking F f 2 Escapement Active 0 ON OFF 3 2M Access Loop Network access 1 Address Customer a...

Page 61: ...12 Loss of Lock Active 0 ON OFF on Frame C 13 xxx Active 0 Avl Norm 14 Reserved Set to 1 15 Reserved Set to 1 3 3 14 CBIT Word Use the CBIT Word item to view and specify the C Bit word The format of the CBIT Word item is CBIT Word Fbbbbbbbbbbbbbb where F is the framing bit and bbbbbbbbbbbbbb represents the remaining 14 bits that you can specify If F is 0 the C Bit Word is an unframed all zeros sig...

Page 62: ...EorifIntfissettoV 24 ASYNC NOTE The Receiver can synchronize to an incoming pattern even if it is inverted The STATUS ALARMS LEDs illuminate to indicate pattern sync and pattern inversion Available test patterns include the fixed patterns pseudorandom 2n 1 patterns andprogrammablepatterns described below AUTO When Pattern is set to AUTO the test instrument attempts at the start of each new test to...

Page 63: ...c 1 1 Alternating 1 s and 0 s 10101010 etc 1 3 1 followed by three 0 s 10001000 etc 1 4 1 followed by four 0 s 1000010000 etc 2 6 1 63 bit pseudorandom pattern with a maximum of 5 sequential zeros and 6 sequential ones as described in CCITT Recommendation Q5 and Q6 2 9 1 511 bit pseudorandom pattern with a maximum of 8 sequential zeros and 9 sequential ones as described in CCITT Recommendation V 5...

Page 64: ...ted timeslot To program this byte use the TS Byte item When Test issettoDATA theTSBYTEpatternisnotavailable PRGM User programmablepattern 1to24bits Toprogram this pattern use the Program Pattern item PRGM is available if Test is set to 2M or DATA DELAY Delay is the pattern that is transmitted when round trip delay is being calculated The DELAY pattern isnotvalidwhenTestissettoMUXortheTransmitter i...

Page 65: ...ern to be used The number of bits displayed depends on the setting of NN To change the length of the pattern move the cursor to the NN position and press the SELECT up or down control until the display shows the desired number of bits As you change the value in NN the number of bits in the last two lines of the display changes to reflect the number of bits you specify To change the bit values in t...

Page 66: ...pecify only the 7 leftmost bits of the TS Byte 3 3 19 Emulate Use the Emulate item to specify whether the INTERCEPTOR 147 will act as the DTE Data Terminal Equipment or the DCE Data Circuit terminating Equipment DTE SelectDTEwhentheINTERCEPTOR147isreplacing a piece of Data Terminal Equipment DTE such as a terminal or a host computer DCE Select DCE when the INTERCEPTOR 147 is replacing a piece of D...

Page 67: ...e set from 50 bit s to 2048000 bit s in 1 bit s steps The maximum data rate is limited by the interface This item only appears when the Rate item is set to SYNTH This item is available when Option 147 1 is installed 3 3 22 Rcv Clk Sel Use the Rcv Clk Sel Receive Clock Select item to select the clock that will supply the timing for data coming in on the data interface For a diagram of the interface...

Page 68: ...NV Invert The INTERCEPTOR 147 generates data on the rising edge of the clock 3 3 24 Rcv Clk Pol Use the Rcv Clk Pol Receive Clock Polarity item to select the polarity of the clock to be used to sample valid receive data For a diagram of the interface leads that are used see Appendix B The following selections are available NORM NORM Normal TheINTERCEPTOR147samples data on the falling edge of the c...

Page 69: ...or 8 V 24A Stop Bits can be set to 1 or 2 3 3 28 Octet Timing Use Octet Timing to set octet timing to ON or OFF for transmit data in 64 kbit s G 703 3 3 29 V 11 T U Use the V 11 T U item to select the mode for the V 11 control leads The following selections are available Term TERM Terminate is recommended for testing balanced circuits operating up to 2 Mbit s UNTERM UNTERM Unterminate is recommend...

Page 70: ... Clock item to select the clock source used for data interface testing INTRNL When Gen Clk is set to INTRNL Internal the transmit timing source is obtained from the INTERCEPTOR 147 s internal clock INTF When Gen Clk is set to INTF Interface the transmit timing source is obtained from the received signal clock 3 4 TIMESLOTS CATEGORY Use the TIMESLOTS category to select the timeslot or timeslots you...

Page 71: ...Graphical depiction of the timeslots for the receive side See the text for an explanation TxTS Graphical depiction of the timeslots for the transmit side See the text for an explanation Coupling Tx Rx Tx Rx The TIMESLOTS category provides a one two or three page display and includes graphical depictions of the timeslots in a 2 Mbit s signal so that you can indicate which timeslots are selected and...

Page 72: ... Timeslot 16 Non selected Timeslot Selected Timeslot on transmit and receive sides Selected Timeslot on receive side Selected Timeslot on transmit side Transmit Timeslots page Receive Timeslots page When Test is set to MUX and Tx Rx is set to DATA 2M 1 page display When Tx Rx 3 page display When Test is set to MUX and Tx Rx is set to 2M DATA 1 page display When Tx Rx 2 page display Timeslots 16 31...

Page 73: ... graphical display changes to reflect your selections Move the cursor to the Rate indicator Press SELECT until the desired rate is displayed As you change the Rate the graphical display changes to select the appropriate number of adjacent timeslots for that rate TS 30 Rate 64 F M Move the cursor to the Timeslot Number Press SELECT until the number of the desired timeslot is displayed As you change...

Page 74: ...nsmit side use the TxTS Transmit Timeslot page The TxTS page is available when Coupling is Tx Rx or when transmitting 2M in a MUX test A Special Case Broadcast Mode When Test Mode is set to VOICE or 64K and Coupling isTx Rx normallyyouwouldsetupthetestinstrument to transmit on one timeslot and receive on one timeslot But you can use the special Broadcast mode to transmit on all timeslots while sti...

Page 75: ...upling Tx Rx Select Tx Rx if you want to select the same timeslots on the transmit and receive sides Tx Rx Select Tx Rx if you want to select different timeslots on the transmit and receive sides NOTE When Coupling is set to Tx Rx and the rates for the RxTS and TxTS pages do not match then the following warning message is momentarily displayed WARNING RX TIMESLOT RATE DOES NOT MATCH TX TIMESLOT RA...

Page 76: ...AL Category Item Available Selections Tx Alarm AIS ON OFF FAS ON OFF or MFAS ON OFF Tx NFAS An 8 bit byte in which certain bits can be edited Tx MFAS An 8 bit byte in which certain bits can be edited Tx ABCD A 4 bit word that can be edited bit by bit Tx Idle A 4 bit word that can be edited bit by bit ABCD A sample ALARM SIGNAL setup is shown below Tx Alarm FAS OFF Tx NFAS C1A11111 Tx MFAS 00001A11...

Page 77: ...AS Distantalarm thatis bit3oftheNFASwordissetto1 MFAS ON OFF MFAS Multiframing Alignment Signal When Tx Alarm is set to MFAS ON the transmitter transmits an MFAS distant alarm that is bit 6 of the MFAS word is set to 1 3 5 2 Tx NFAS Use the Tx NFAS Transmit not FAS item to specify the NFAS byte which is transmitted in Timeslot 0 in odd numbered frames of a framed 2 Mbit s signal As shown in the fo...

Page 78: ... bit position 6 an uppercase L is displayed when the test instrument is generating Sa6 loopcodes 3 5 3 Tx MFAS Use the Tx MFAS Transmit MFAS item to specify the MFAS byte which is transmitted in Timeslot 16 of the first frame of every multiframe in all MFAS and MFAS CRCformatted2Mbit ssignals Asshowninthefollowing diagram you can specify the values for bits 5 7 and 8 of the MFAS byte Bits 1 throug...

Page 79: ... can cause a false multiframealignmenttooccurinreceiving equipment Bit C becomes an uppercase L when the test instrument is generating C Bit loopcodes 3 5 5 Tx Idle ABCD The Tx Idle ABCD item is used to set the four signaling bits that are inserted into the transmitted signal for each idle channel The format of the Tx ABCD item is Tx Idle ABCD XXXX where XXXX represents the four signaling bits To ...

Page 80: ...gory Item Selections Language ENGLISH or Local Language Tx Coding AMI or HDB3 Error Type LOGIC CODE or FAS Error Rate 10 3 or 5x10 3 Adjacent 3 2 or 1 FAS Errs Site ID 8 character alphanumeric site identification Result Print STD SUM or SIGNAL Auto Print OFF TIMED or EVENT Time Interval HH MM Event SIGNAL ON OFF FRAME ON OFF LOGIC ON OFF ALARMS ON OFF DATA LEAD ON OFF RS232 Mode PRINTER or REMOTE ...

Page 81: ...T FAS ERRS FAS LOSS MFAS DIST MFAS ERRS MFAS LOSS PATT LOSS PATT SLIP SES SIG LOSS TS16 AIS UNAVL SEC or ALL Hist Print See description Start DD HH MM 00 00 00 to 99123 59 Len AUTO or MANUAL DD HH MM Hist Type GRAPH or LIST Hist Buf Clear See description Program X STORE Program X RECALL Performance G 821 or M 2100 Beeper ON or OFF FAS Results BIT or WORD Time HH MM Date DD MMM YYYY Memory Clear Se...

Page 82: ...ucting a MUX test that is transmitting a 2 Mbit s signal NOTE The Tx Coding setup has no effect on receiver operation Instead the receiver is always set up to decode HDB3 zero substitution words when they are detected Thus the receiver is always compatible with either the AMI code which does not contain zero substitution words or the HDB3code whichdoescontainzerosubstitution words The following se...

Page 83: ...rsa The receiving test equipment should detect bit errors When FAS CRC or MFAS CRC framing is used the receiving test equipment should also detect CRC errors CODE Insertscodeerrors bipolarviolations intothedataor overhead portion of the transmitted signal To ensure that no bit errors are caused code errors are inserted suchthattheydonotfallwithinHDB3zerosubstitution words FAS Inserts logic errors ...

Page 84: ...Result Print item to specify the type of Results Print you want A Results Print is created whenever you press RESULTS or when Auto Print is set to TIMED The following selections are available STD Select STD for standard Results Prints which contain all of the results accumulated by the test set For a sample Print see Section 5 Using a Printer SUM SelectSUMforsummaryResultsPrintswhichcontain the fo...

Page 85: ...8 Auto Print Use the Auto Print Automatic Print item to enable or disable automatic Prints The selections listed below are available OFF Disables all automatic Prints TIMED Enables Timed Results Prints The type of Results PrintdependsontheselectionintheResultPrintitem The time interval between Prints depends on the selection in the Time Interval item NOTE When a Timed Results Print prints out the ...

Page 86: ...int to be created The format of the Event item is Event SIGNAL ON More than one selection can be set to ON at the same time Setting all of the selections to OFF in effect disables Event Prints The following event types can be selected SIGNAL ON OFF WhenEventissettoSIGNALON anyofthefollowing signal events will trigger an Event Print Signal Loss Signal Present Clock Loss Clock Present HDB3 Lost HDB3...

Page 87: ...red MFAS Distant Alarm Detected MFAS Distant Alarm Cleared DATA LEAD ON OFF When Event is set to DATA LEAD ON a change on any of the following data leads will trigger an Event Print RTS RS DTR TR CTS CS DSR RLSD TM RL LL DM RR 3 6 11 RS232 Mode Use the RS232 Mode item to specify whether the PRINTER REMOTECONTROLconnectorwillbeused to connect a printer or to a remote controller to the test instrume...

Page 88: ...ailable for the Printer Mode item ASCII Selects the ASCII mode for printer operation In ASCII mode the bars in a graph are represented by columns of asterisks This selection is useful for sending Histogram Prints to a device such as a remote controller that cannot produce bars but can produce ASCII text characters such as asterisks GRAPH Selects the graphic mode for printer operation NOTE When Pri...

Page 89: ... for the appropriate baud rate parity and number of data bits per byte The RS232 Port item is not available when Printer Type is set to PR40A since the RS232 port is then automatically configured properly The format for the RS232 Port items is RS232 Port BaudRate Parity Bits Tochangeaselection movethecursortotheselectionyou want to change and press SELECT until the desired selection is displayed T...

Page 90: ...ormation can be written to it To change the selection move the cursor to ON or OFF and press SELECT ON The histogram buffer collects results information NOTE If the buffer was previously OFF and you turn it ON the display will show the following message Clear Buffer NO YES Move the cursor to the appropriate answer NO or YES andpressSELECT IfyouselectNO previously collected results remain in the hi...

Page 91: ...ion Signal BIT ERRS Bit Errors CHAR ERRS Character Errors CODE ERRS Code Errors CRC4 ERRS CRC4 Errors ERR SEC Errored Seconds FAS DIST Distant Frame Alignment Signal Losses FAS ERRS Frame Alignment Signal Errors FAS LOSS Frame Alignment Signal Losses MFAS DIST Distant Multiframe Alignment Idle Signal Losses MFAS ERRS Multiframe Alignment Signal Errors MFAS LOSS Multiframe Alignment Signal Losses P...

Page 92: ...ait Ifnoinformationregardingthespecifiedresult asselected in the Hist Rslt item has accumulated in the histogram buffer the display shows the following message No Such Event During Specified Time If the histogram has been prepared and placed in the Print Buffer to be printed out but the printer is not ready the display shows the following message HISTOGRAM PRINT PRINTS PENDING PRINT BUFFER xx FULL...

Page 93: ...rinting one or more of the waiting Prints or by clearing the Print Buffer before you can send histogram information to the Print Buffer 3 6 19 Start Use the Start item to specify the start time relative to the time the histogram buffer was originally turned on for the HistogramPrint SpecifythestarttimeintheDD HH MM day hour minute format NOTE Acompletespecificationofthetimetobecovered in the Histo...

Page 94: ... whichpresentstheresults information in the form of a 2 dimensional graph for HistogramPrints Forprinting normallyuseGRAPH LIST Selects the LIST format which presents the results informationasalistofASCIItextcharactersseparated bycommas Usually LISTisusedonlyinconnection with spreadsheet work 3 6 22 Hist Buf Clear Use the Hist Buf Clear Histogram Buffer Clear to erase the contents of the histogram...

Page 95: ...current setup information The information is stored in the battery backed storage location having the number you specify Then you can later recall the informationstoredunderthatprogramnumbertoconfigure the INTERCEPTOR 147 Program X STORE To store a SETUP configuration perform the following steps 1 Move the cursor to the program number 2 Press SELECT until the display shows the number you want to a...

Page 96: ...LECTuntilthedisplayshowsthenumber of the program you want to recall 3 Move the cursor to RECALL 4 Press SELECT As the test instrument recalls the SETUP configuration that is stored under the number you specified the display shows the following message RECALLING PROGRAM The test instrument is automatically reconfigured to the setup stored in the specified program 3 6 25 Performance Use the Performa...

Page 97: ...s item to specify whether you want the FAS Errors result to be based on FAS bit errors or FAS word errors The following selections are available for FAS Results BIT When based on FAS bit errors one FAS error is counted for every bit that is in error in a FAS word WORD When based on FAS word errors one FAS error is counted when one or more errors occur in a FAS word 3 6 28 Time Use the Time item to...

Page 98: ...ayedintheDate result Below is an example showing the format of the Date item Date 15 FEB 1994 The current date is shown in the DD MMM YYYY day month year format 3 6 30 Memory Clear Use the Memory Clear item to reset all battery backed memory locations to their factory default configurations CAUTION Memory Clear permanently erases stored programs and setups Be careful using the Memory Clear feature...

Page 99: ...ress SELECT The display shows the following message Are You Sure NO YES Move the cursor under the appropriate response NO or YES and press SELECT If you select YES the test instrument clears its battery backed memory This process takes several seconds When completed the test instrument is back in its factory default setup and the Print Buffer is empty ...

Page 100: ...3 Setup Categories 3 58 INTERCEPTOR 147 2 Mbit s and Data Analyzer ...

Page 101: ... category you want to view press RESULTS The test results included in that category are displayed in the liquid crystal display NOTE The displayed results pertain to the current test only 4 2 SUMMARY RESULTS The SUMMARY Results category presents a helpful list of the key results from the other results categories The SUMMARY category can include the following results Bit Errs Bit Errors Patt Slip P...

Page 102: ...t results are available the SUMMARY results category displays the following message Results Unavail When the INTERCEPTOR 147 is connected to the circuit under test and test results indicate no errors the SUMMARY results category displays the following message Results OK 4 3 LOGIC TIME RESULTS The LOGIC TIME Results category includes results based on bit errors detected in the test pattern and also...

Page 103: ...is the ratio of the number of bit errors to the total number of bits received Patt Loss The Patt Loss Pattern Synchronization Loss result indicates the number of times the receiver has lost pattern synchronization Patt Slip ThePattSlip PatternSlips resultindicatesthenumber ofpatternslipsdetectedinthereceivedpseudorandom 2 N 1 test pattern Pattern slips occur when one or more bits of the test patte...

Page 104: ...or a signal to travel to the looped back point in the network and back This test resultisavailableonlywhenPatternissettoDELAY NOTE To update this test result press the RESTART control The accuracy of this result is to the nearest bit for example at64kbit stheaccuracyis 32microseconds and at 2 Mbit s the accuracy is 1 microsecond SL Delay TheSLDelay SignalLeadDelay resultindicatesthe amount of time...

Page 105: ...following results Freq Frequency Freq ppm Frequency Deviation Bit Slip Frame Slip Level dBnom Level Vpeak Code Errs Code Rate FAS Errs FAS Rate MFAS Errs MFAS Rate CRC Errs CRC Rate FAS Word NFAS Word MFAS Word CRC MF Wrd REBEs Sa6Bits DescriptionsoftheSIGNAL CODE FASresultsfollow Freq The Freq Frequency result indicates the measured frequency in hertz of the received signal Freq ppm TheFreq ppm F...

Page 106: ...relative to the 2 Mbit s G 703 nominal value Level Vpeak The Level Vpeak result indicates the peak level of the received 2 Mbit s signal expressed in volts Code Errs The Code Errs Code Errors result indicates the number of code violations detected at 2 Mbit s Code Rate The Code Rate result is the Code Errs result divided by the number of bits received FAS Errs TheFASErrs FrameAlignmentSignalErrors...

Page 107: ... in FAS CRC or MFAS CRC synchronization CRC Rate The CRC Rate result is the 2 Mbit s CRC Errs result dividedbythetotalnumberofCRC 4sub multiframes received FAS Word The FAS Word result is the FAS Word found in Timeslot 0 of even numbered frames The format for the FAS Word result is C0011011 where C Indicates the presence of a valid CRC 4 code 0011011 The normal Frame Alignment Signal If an X appea...

Page 108: ...ce BBBBB Spare bits that are used in various applicationsrecommendedbyCCITT When these bits are not used they should be set to 1 MFAS Word The MFAS Word Multiframe Alignment Signal Word result indicates the 8 bit byte found in Timeslot 16 of Frame 0 of every multiframe TheformatfortheMFASWordresultisMMMMbabb where MMMM The received Multiframe Alignment Signal Normally the MFAS is 0000 If an X appe...

Page 109: ...The values that appear in these bit positions will depend on the application REBEs The Remote End Block Errors REBEs result indicates the number of Remote End Block Errors detected while in CRC 4 multiframe alignment with REBEs turned on The REBEs result is only valid for 2 Mbit s modes with CRC set to ON Sa6Bits The Sa6Bits result displays the Sa6 loop code bits The Sa6 messages are applicable to...

Page 110: ... Timeslot 3 Rx Byte 00011010 ABCD 1101 Freq 1966 Hz Timeslot 3 Peak 126 Level 7 6 dBm The CHAN SIGNALING category can include the following results Timeslot Active Timeslots Rx Byte ABCD Freq Hz Peak Level dBm C Bits C Bit Delay Timeslot The Timeslot line is displayed at the top of every page of the CHAN SIGNALING display The Timeslot number 0 through 31 indicates the timeslot for which the result...

Page 111: ...ected on the timeslot F When FAS is present an F replaces the 0 of Timeslot 0 to indicate the presence of the FAS word M When MFAS is present an M replaces the 6 of Timeslot 16 to indicate the presence of the MFAS word Replaces a timeslot s number in the graphical representation to indicate that the timeslot is idle Rx Byte The Rx Byte Received Byte result indicates the 8 bit byte received in the ...

Page 112: ...1000 If out of C Bit Framing synchronization the C Bits show f00000000000000 and Status shows IDLE C Bit Delay The C Bit Delay is the delay between the time the last C Bit is sent and the C Bit Word is received with the acknowledgement bit bit 8 low 4 6 PERFORMANCE RESULTS The PERFORMANCE Results category contains results that are calculated according to CCITT Recommendation G 821 or M 2100 depend...

Page 113: ... Err SES BER SES 4 6 1 G 821 Results Avl Sec Available Seconds calculated as specified in CCITT Specification G 821 Avl Sec Percentage of Avalilable Seconds calculated as specified in CCITT Specification G 821 Unavl Sec UnavailableSeconds calculatedasspecifiedinCCITT Specification G 821 SES Severely Errored Seconds calculated as specified in CCITT Specification G 821 SES Percentage of Severely Err...

Page 114: ...cification G 821 EFS Percentage of Error Free Seconds calculated as specified in CCITT Specification G 821 Err SES Bit Errors Minus Severely Errored Seconds Total bit errors excluding errors that occurred during severely errored seconds BER SES Bit Error Rate Minus Severely Errored Seconds The BER calculated over the test interval excluding severely errored seconds 4 6 2 M 2100 Results 2 Avl T Ava...

Page 115: ...fication M 2100 2 SES Percentage of Severely Errored Seconds calculated as specified in CCITT Specification M 2100 2 ES ErroredSeconds ThenumberofAvailableSeconds thatcontainoneormoreerrors calculatedasspecified in CCITT Specification M 2100 2 EFS Error Free Seconds calculated as specified in CCITT Specification M 2100 2 EFS Percentage of Error Free Seconds calculated as specified in CCITT Specifi...

Page 116: ...Test Results 4 16 4 INTERCEPTOR 147 2 Mbit s and Data Analyzer ...

Page 117: ...buffer is part of the test instrument s battery backed memory To send the contents of the Print Buffer to a printer connect a printer to the INTERCEPTOR 147 and set up for printing WhenaPrintissenttotheprinter theinformation is removed from the Print Buffer For information regarding how to create the following types of Prints see the indicated section Controls Print Section 5 2 Results Print Secti...

Page 118: ...INT 2048K Framing AUTO Pattern AUTO Tx ABCD 1101 Tx AIS Alarm OFF Tx FAS Alarm OFF Tx MFAS Alarm OFF TX NFAS C1a11111 Tx MFAS 00001a11 Result Print SUM Auto Prints OFF RS232 Mode PRINTER RS232 Prt2400 N 8 Printer Mode ASCII Printer Term CRLF Hist Buf 0 OFF Hist Rslt SES Start 00 00 00 LenAUTO 00 00 01 Hist Type GRAPH 5 3 RESULTS PRINT A Results Print gives you a Print of the accumulated test resul...

Page 119: ...INT 16 10 15 7 JAN 1994 Rcv Pat 2 15 1 Bit Errs 0 BER 0 E 09 Patt Loss 0 Patt Slip 0 Elpsd Sec 3161 Test Sec 3161 Freq 2047999 Hz Freq ppm 1 Bit Slip No Ref Frame Slip No Ref Level 0 1 dBnom Level 2 974 Vpeak Code Rate 0 E 09 FAS Rate 0 E 06 MFAS Rate 0 E 06 CRC Rate 0 E 06 CRC Errs 0 CRC MF Wrd 00101111 Code Errs 0 FAS Errs 0 MFAS Errs 0 FAS Word C0011011 NFAS Word C1011111 MFAS Word 00001011 EFS...

Page 120: ...ot since the start of the current test Each changeofstateistimeanddatestamped AsampleResults Print in Signaling Summary Format follows SIGNALING SUMMARY 14 50 24 15 JAN 1994 TIMESLOT 01 ABCD 14 49 08 15 Jan 1994 0101 14 49 13 15 Jan 1994 1101 14 49 21 15 Jan 1994 0101 14 49 27 15 Jan 1994 1101 14 49 40 15 Jan 1994 0101 14 49 53 15 Jan 1994 1101 14 50 21 15 Jan 1994 0101 5 4 AUTO PRINT TIMED ATimed...

Page 121: ...ted value of the event since the beginning of the test and the date and time that it occurred To create an Event Print use the following instructions 1 Select the AUXILIARY setup category 2 Set Auto Print to EVENT 3 Set Event s to act as the Event Print trigger Each Event Print lists all the error types alarms and events that occurred during the second the Event Print was triggered Two sample Even...

Page 122: ...information that you no longer need you can clear the histogram buffer by using the Hist Buf Clear item in the AUXILIARY setup category To find out how full the histogram buffer is at any time check the HistBufitemintheAUXILIARYsetupcategory 2 When desired turn the histogram buffer on to start collecting information To turn on the histogram buffer in the AUXILIARYcategory setHistBuftoON When the h...

Page 123: ...ts of the histogram buffer Use Start to specify the start time and Len to specify the amount of time to be covered To print the entire contents of the histogram buffer setStartto00 00 00andsetLentoAUTO If you find that all or most of the results are clustered around a given time period you can create another Histogram Print this time zoomingin onasmallertimeperiodsothatyou can see that time period...

Page 124: ...rint GRAPH GRAPH 10K 9K 8K 7K 6K 5K 4K 3K 2K 1K 0 00 00 00 30 01 00 01 30 02 00 02 30 03 00 B i t E r r s Storage Bit Errs vs Time HISTOGRAM PRINT 16 46 50 7 Jan 1990 Time In Hours Minutes Relative To 16 44 02 7 Jan 1990 Start Of Acquisition Start Of Print DD HH MM Duration Of Print DD HH MM Seconds Per Bar Seconds Seconds Per Bar DD HH MM SS Last Second Of Data DD HH MM SS 16 44 01 7 Jan 1990 00 ...

Page 125: ...nter Figure 5 2 Histogram Print GRAPH ASCII 10K 9K 8K 7K 6K 5K 4K 3K 2K 1K 0 00 00 00 30 01 00 01 30 02 00 02 30 03 00 B i t E r r s Power Bit Errs vs Time HISTOGRAM PRINT 16 46 39 7 Jan 1990 Time In Minutes Seconds Relative To 16 44 02 7 Jan 1990 Start Of Acquisition Start Of Print DD HH MM Duration Of Print DD HH MM Seconds Per Bar Seconds Seconds Per Bar DD HH MM SS Last Second Of Data DD HH MM...

Page 126: ...NTERCEPTOR 147 s modified V 24 PRINTER REMOTE CONTROL port and that uses software flow control such as the TTC PR 40A Thermal Printer Use the following steps to prepare to print Set up the INTERCEPTOR 147 1 Select the AUXILIARY setup category 2 Set RS232 Mode to PRINTER Start Of Acquisition Start Of Print DD HH MM Duration Of Print DD HH MM Seconds Per Bar Seconds Seconds Per Bar DD HH MM SS Last ...

Page 127: ...inter must be set up for the same baud rate parity data bits and stop bits as the INTERCEPTOR 147 If you are using the PR 40A Thermal Printer verify that the DIP switches on the bottom of the printer are set up to match the automatic settings on the INTERCEPTOR 147 Baud Rate 2400 Parity None Data Bits 8 Stop Bits 1 Connect the printer to the INTERCEPTOR 147 5 UsingthePrinter RemoteControlcable 312...

Page 128: ...s forprintingwhen a printer is available If you do not want to print any stored Prints clear the buffer To clear the PrintBuffer pressthePRINTERCLEARcontrol The display shows the following message Are You Sure NO YES Position the cursor to the appropriate choice and press SELECT The display momentarily shows the following message CLEARING PRINT BUFFER Begin printing 9 To begin printing place the p...

Page 129: ...st results by displaying them on a computer screen The INTERCEPTOR 147 complies with the command syntax specified in IEEE 488 2 1987 Among other things IEEE 488 2 supports certain common commands and standardizes the numerical format for exponential notations to make writing remote control programs less complex For information on how to begin and to operate in remote control see Section 6 2 For an...

Page 130: ...nce the same port on the test instrument is used for printing and for remote control the printer and the remotecontrollercannotbeusedatthe sametime However informationthat would normally be printed can be output to the remote controller s screen 2 Power on the 147 and the remote controller 3 Set up the 147 to operate under remote control In the AUXILIARY category set RS232 Mode to REMOTE Also appr...

Page 131: ...ceives no other output Computer mode lets you concentrate on the commands and responses without being interrupted by echoed statements or error messages To switch to computer mode type the following command MISC RC_MODE COMP 5 When you are finished using remote control mode return control to the front panel To leave remote control and return control to the front panel enter the LOCAL command 6 3 C...

Page 132: ...whateveryouhave set it to be See the SET TERM command You may enter more than one command at a time Just separate the commands with a semicolon and when you are finished entering commands enter a terminator as illustrated below command subcommand command subcommand terminator Additionally when you type a string of commands if they all begin with the same command you do not need to type the command...

Page 133: ...nds and Queries ThestandardIEEE488 2commandsandqueriesarelisted alphabetically in this section These commands all begin with an asterisk Information that is entered using the remote controller is shown in this bold typeface Where useful an explanation and example are included Additionally for the RES queries short forms of the query are shown and Not Ready Values NRV are indicated as applicable Th...

Page 134: ...ster When the Standard Event Status Register is read the value returned is the bit weights of all the set bits at the time the byte was read The act of reading the Standard Event Status Enable Register sets Bit 5 of the Status Byte Register The bits in the Standard Event Status Enable Register include Bit 0 Operation Complete Bit 1 Request Control Bit 2 Query Error Bit 3 Device Dependent Error Bit...

Page 135: ...ster include Bit 0 Operation Complete Bit 1 0 Bit 2 Query Error Bit 3 0 Bit 4 Execution Error Bit 5 Command Error Bit 6 0 Bit 7 Power On sets Bit 5 of the Status Byte Register The act of reading the Standard Event Status Register sets Bit 5 of the Status Byte Register For additional information see the SRE and OPC commands and see Appendix B Example ESR Requests the Event Status Register status 32...

Page 136: ...nd to set the Operation Complete OPC bit Bit 1 of the Standard Event Status Register This bit is set when all pending device operations have been completed For additional information see Appendix B The response to the OPC query is an ASCII 1 in the output queue when all pending device operations have been completed Example SET TMOD 2048K OPC Sets the OPC bit 1 in the Standard Event Status Register...

Page 137: ... certainly change in future software versions However theorderandpositionsofthe currently defined options will not change Example OPT Requests the list of currently installed options DELTA_PPM 2M_REF 0 0 0 0 0 PRE int Parallel Poll Enable Register command query Use the PRE command to set the IST message of the INTERCEPTOR 147 The PRE query requests the contents of the Parallel Poll Enable Register...

Page 138: ...tus Enable Registers when powered on This setting prevents the INTERCEPTOR 147 from generating a service request when it is powered on 0 The INTERCEPTOR 147 does not clear the enable registers when powered ON The PSC query requests the current power on status clear setting Example PSC 0 Preserves the Status Enable Registers through a power cycle PSC Requests the current value of the power on statu...

Page 139: ...is the same as the Program Store item in the AUXILIARY category Example SAV 3 Saves the current test setup as Setup 3 SRE mask Service Request Enable Register command query The SRE command sets the Service Request Enable Register bits The value of the bits in the Service Request Enable Register determines which bits in the Service Request Register are to be enabled When a bit of the Service Reques...

Page 140: ...tion see the STB command and see Appendix B Example SRE 2 Enables Bit 1 Print Available PAV to set the Master Status Summary bit SRE Requests the SRE register status 2 The INTERCEPTOR 147 responds with the current value of the SRE register STB Status Byte query only The STB query requests the current value of the status byte When you read the Status Byte Register the value returned is the bit weig...

Page 141: ...s Thiscommand is similar to the RESULT CLEAR command TST Self Test query only Use the TST query to find out whether the INTERCEPTOR147passedorfaileditslastself test The INTERCEPTOR 147 performs a self test when powered on The TST query does not cause a self test to be performed A response to a TST query of 0 indicates that no problems were encountered during the self test A response of 1 indicates...

Page 142: ...e SET TMOD 64K WAI SET FRM AUTO term Causes all commands previous to the WAI command to execute before starting the commands after WAI 6 3 3 Status Commands and Queries STATUS ALRM Status Alarm query only TheSTATUS ALRM queryrequeststhecurrentcontents oftheAlarmregister Thevaluereturnedisthebitweights of all the set bits at the time the byte was read The bits of the Alarm register include Bit 0 AI...

Page 143: ...he alarms indicated by a 1 in the mask The mask is a numberthatisthedecimalequivalentofthebinarynumber in the register where Bit 7 is the Most Significant Bit To enable a given alarm specify a number that places a 1 in that alarm s bit position The STATUS ALRM_EN query requests the current contents of the Alarm register The value returned is the bit weights of all the set bits at the time the byte...

Page 144: ...T 8 The MFAS Distant history alarm bit 3 is active STATUS CLEAR_ERR Status Clear Error Message Queue command only The STATUS CLEAR_ER command clears all error messages from the buffer STATUS CLEAR_PR Status Clear Printer command only The STATUS CLEAR_PR command clears the Print Buffer It also clears the bit in the Status byte that tells whether or not Prints are available STATUS ERROR Status Error...

Page 145: ...t Summary register Example STATUS LINE Reads the Line register 11 The value 11 1 2 8 indicates that signal presence FAS sync and pattern sync are detected STATUS LINE_EN mask Status Line Enable Register command query The STATUS LINE_EN command is used to activate the lines indicated by a 1 in the mask The mask is a number that is the decimal equivalent of the binary number in the register Bit 7 is...

Page 146: ...ed value indicating which bits are high in the Line History register Bits 0 through 5 are set when the corresponding bits in the Line Register transition from 1 to 0 indicating a loss of synchronization Bit 7 is set when a pattern slip occurs A non zero value in this register indicates that a problem occurred since the last time the register was read Reading the register resets all bits to 0 and s...

Page 147: ...te that there is a Print in the remote control buffer The example below shows a typical sequence of commands for use in viewing Prints For more information see the commands included in the example andtheSTATUS CLEAR_PRandSYSTEM RC_PRINT commands and Appendix B Example SYSTEM RC_PRINT ON Enables the remote control Print Buffer MISC PRT CTRL Causes a Controls Print to be created and stored in the re...

Page 148: ...Appendix B The bits of the Test Summary register include Bit 0 Line Status Summary Bit 1 Alarm Status Summary Bit 2 0 Bit 3 0 Bit 4 0 Bit 5 0 Bit 6 0 Bit 7 0 Example STATUS TEST Read the Test Summary register 2 The AIS Alarm Summary bit is set high STATUS TEST_EN mask Status Test Summary Enable Register command query TheSTATUS TEST_ENcommandsetstheTestSummary Enable register bits The STATUS TEST_E...

Page 149: ...rm Status Summary Bit 2 0 Bit 3 0 Bit 4 0 Bit 5 0 Bit 6 0 Bit 7 0 The STATUS TEST_EN query requests the contents of the Test Summary Enable register The STATUS ALRM_EN query responds with an integer indicatingwhichalarmsareactivated Readsthecurrently enabled condition SYSTEM RC_PRINT ON OFF System Remote Control Print Buffer command only The SYSTEM RC_PRINT command turns the remote controlPrintBuf...

Page 150: ...it string Set the ABCD signaling Bits command query Use this command to specify the values of the ABCD or signaling bits in the transmitted signal Also see SET IABCD Example SET ABCD 1010 Sets the signaling bits to 1010 SET ABCD Requests the current setting of the signaling bits 1010 The signaling bits are set to 1010 SET ADJF 3 2 1 Set the number of Adjacent FAS Errors command query SET AUPR OFF ...

Page 151: ...ts the date to be the second day of January 1995 SET EMUL DTE DCE Set Emulation command query SET ERRT LOGIC CODE FAS Set the error type command query SET EVPR ALR ON OFF Set the Events Print Alarms trigger command query SET EVPR FRM ON OFF Set the Events Print Framing trigger command query SET EVPR LOG ON OFF Set the Events Print Logic trigger command query SET EVPR SIG ON OFF Set the Events Prin...

Page 152: ...ow full the histogram buffer is 54 The histogram buffer is 54 full SET HSTL DD HH MM AUTO END Set the histogram length command query Used to set or request the histogram s length You can specify the amount of time specifying values for the day hour and minute as follows DD 00 to 99 HH 00 to 23 MM 00 to 59 For more information and a complete example see the SET HSTM and SET HSTS commands SET HSTM A...

Page 153: ...ng SET HSTL Requests the histogram length 02 23 09 The histogram length is 2 days 23 hours and 9 minutes SET HSTP Set the Histogram Print query only Use the SET HSTP query to find out whether or not there is a histogram in the Print Buffer If there is a histogram in the Print Buffer the request triggers the printout SET HSTR SIG_LOSS FAS_LOSS MFAS_LOSS PATT_LOSS AIS TS16_AIS FAS_DIST MFAS_DIST PAT...

Page 154: ...the histogram buffer was turned on Often the start time is the same as the buffer turn on time In that case the start time is 00 00 00 Example SET HSTS 01 01 15 Tells the INTERCEPTOR 147 that the histogram portion to be eventually printed is to be that portion that begins one day and one hour and fifteen minutes after the histogram buffer was turned on SET HSTS Requests the histogram start time 01...

Page 155: ...IC_RATE 1E 3 5E 3 Set the error insertion rate for logic errors command query SET LPBACK OFF CBITS SA6BITS Select the ISDN loopback code command query SET LPBACK_PGM 4 bit string Set the loopback programmable command query 4 bit code SET MEMCLR Memory Clear command only SET MUX 2M 64K NX64K MX64K 56K NX56K MX56K Set Multiplexer 2 Mbit s side command query SET MUX INTF V 24S V 11 X 21 V 35 64K Set ...

Page 156: ...ed or not selected command query Used to indicate which transmit timeslots are selected A selected timeslot is indicated by a 1 a non selected timeslot is indicated by a 0 The 32 bit string represents timeslots 0 through 31 SET Nx64K RX start timeslot number of timeslots Set adjacent receive timeslots to command query be selected Used to indicate which receive timeslots 0 through 31 are selected I...

Page 157: ...lnumber of selected timeslots The overall rate equals the rate for oneofthetimeslotstimesthenumberoftimeslotsselected To set the individual timeslot rate see SET CHRT Example SET Nx64K TX Requests selected transmit timeslots 4 2 Timeslots 4 and 5 are selected SET OCTET ON OFF Set Octet command query SET PATT AUTO MARK SPACE 1 1 1 3 1 4 2 6 2 9 2 11 2 15 2 20 2 23 QRSS TSBYTE PRGM DELAY Set Pattern...

Page 158: ... the programmable pattern command query SET PTHRU ON OFF Set Pass Through command query SET RATE 300 600 1 2K 2 4K 4 8K 9 6K 19 2K 38 4K 48K 56K 64K 128K 256K 384K 512K 1024K 1536K 1984K 2084K SYNTH Set Rate on the Data link command query SET RCLK POL NORMAL INV Set Receive Clock Polarity command query SET RCLK SEL ST TT Set Receive Data Clock command query SET REBE ON OFF Set Remote End Block Err...

Page 159: ... Whenenteringthiscommand youmustterminate the command with the previously selected termination character SET TEST 2M DATA MUX Set Test command query SET TIME HH MM Set Time command only Specify the time in the format shown using a 24 hour clock Example SET TIME 23 59 Sets the time to be one minute before midnight SET TMINT HH MM Set Time Interval for TIMED Prints command query SET TMOD 2048K VOICE...

Page 160: ...S command query SET TXAL FAS ON OFF Set Transmit Alarm FAS command query SET TXAL MFAS ON OFF Set Transmit Alarm MFAS command query SET TXCLK INT REC PPM 50 PPM 100 PPM 100 PPM 50 2MREF Set Transmit Clock command query Note The PPM and 2MREF selections are valid only if Option 147 1 is installed SET TXCOD AMI HDB3 Set Transmit Coding command query SET TXMFAS 4 bit string Set Transmit MFAS Word com...

Page 161: ...hronous Parity command query SET V 24A STOP 1 2 Set V 24 Asynchronous Stop Bits command query 6 3 5 Result Commands and Queries RES AVL_SEC Results Percentage of Available Seconds query only Short form RES AVLS Not Ready Value 1 00 RES DEG_MIN Results Percentage Degraded Minutes query only Short form RES DEGM Not Ready Value 1 00 RES EFS Results Percentage of Error Free Seconds query only Not Read...

Page 162: ...S Results Percentage of Severely Errored query only Seconds NOTE Only valid in M2100 performance RES 2_AV_T Results Available Time in seconds query only NOTE Only valid in M2100 performance RES 2_EFS Results Error Free Seconds query only NOTE Only valid in M2100 performance RES 2_ES Results Errored Seconds query only NOTE Only valid in M2100 performance RES 2_SES Results Severely Errored Seconds q...

Page 163: ...elta ppm query only Short form RES 2MFRQP Not Ready Value 0 RES 2M_LEVEL_DBNOM Results 2 Mbit s Level dB nominal query only Short form RES 2MLVLD Not Ready Value 99 9 RES 2M_LEVEL_VPEAK Results 2 Mbit s Level Voltage Peak query only Short form RES 2MLVLV Not Ready Value 1 00 RES ABCD timeslot Request the ABCD bits query only Returns the value of the four signaling bits ABCD bits Not Ready Value NO...

Page 164: ... the FAS Word MFAS is not being used and Timeslots 3 4 11 12 25 26 27 30 and 31 are active Note that only the last digit of the timeslot number is shown for example Timeslot 25 appears as a 5 and Timeslot 31 appears as a 1 and the timeslots are in listed in sequence 0 through 31 RES TMSL 25 Announces that timeslot 25 will be the timeslot to view RES TMSL Requests the values for the timeslot 101110...

Page 165: ...uery only Short form RES BITS Not Ready Value 1 No Reference 0 The No Reference value indicates that the information cannot be supplied because the required external 2 Mbit s reference signal is not available RES CBITS Results C Bits string query only RES CHER Results Character Errors query only Not Ready Value 1 RES CODE_ERRS Results Code Errors query only Short form RES CDER Not Ready Value 1 RE...

Page 166: ...Results Date query only Not Ready Value 0 Jan 0000 RES DEG_MIN Results Degraded Minutes query only Short form RES DEGM Not Ready Value 1 RES DISP HOLD ON OFF Display Hold command query Used to turn the Display Hold on or off or to check the status of Display Hold This remote control command has the same effect as that of pressing DISPLAY HOLD on the front panel of the test instrument RES EFS Resul...

Page 167: ... Not Ready Value 1 RES FAS_RATE Results FAS Error Rate query only Short form RES FSRT Not Ready Value 1 0E 0 RES FAS_WORD Results FAS Word query only Short form RES FSWD Not Ready Value NOT READY RES FRAME_SLIP Results Frame Slip query only Short form RES FSLP Not Ready Value 0 No Reference 0 The No Reference value indicates that the information cannot be supplied because the required external 2 M...

Page 168: ... BER result was 1 5 x 104 RES HIST RESET History Reset command only RES HOLD Results Hold command only Storesasnapshotofallresultsintheremotecontrolbuffer For more information and a complete example see the RES HELD query RES LEVEL_DBM timeslot Results Level in dBm query only Short form RES LVL0 timeslot Not Ready Value 99 9 RES MFAS_ERRS Results MFAS Errors query only Short form RES MFER Not Read...

Page 169: ...AL CODE FAS category Short form RES NFWD Not Ready Value NOT READY RES PATT_LOSS Results Pattern Loss query only Short form RES PATL Not Ready Value 1 RES PATT_SLIP Results Pattern Slip query only Short form RES PATS Not Ready Value 1 RES PEAK timeslot Results PCM code peak query only Not Ready Value 999 RES RCV_PAT Results Receive Pattern query only Short form RES RCVP Not Ready Value NOT READY R...

Page 170: ...al Lead Delay query only RES TEST_SEC Results Test Seconds query only Short form RES TSTS Not Ready Value 1 RES TIME Results Time query only Used to obtain the current time setting giving the hour minute and second in HH MM SS format Not Ready Value 00 00 00 RES TIMESLOT timeslot Results Timeslot command and query For information and a complete example see the RES ACTIVE_TIMESLOTS command Short fo...

Page 171: ...K command This command is useful to prevent changes being made on the front panel while in remote control mode In the response to the query a 0 indicates that the panel is not locked and a 1 indicates that the panel is locked MISC DISP HOLD ON OFF Miscellaneous Display Hold command query MISC ERRIN RATE ON OFF Miscellaneous Error Insert Rate command query MISC ERRIN SNGL Miscellaneous Error Insert...

Page 172: ...ce the speaker to 9 the loudest REMOTE Remote Control command only Sets the test instrument to remote control In remote control allcontrolsonthefrontpanelofthetestinstrument are disabled except PANEL LOCK UNLOCK Unlock command only Enables the PANEL LOCK control See the LOCK command 6 4 ERROR MESSAGES If a remote control command or query is typed incorrectly the INTERCEPTOR 147 responds with an er...

Page 173: ...in response when you send one of the SET commands Bitstring Too Short This error message is caused by sending a bit string with toofewbits forexample sending3bitsinsteadofsending 8 bits You may receive this message in response when you send one of the SET commands Cannot Set Length Auto Mode Enabled This error message is caused by sending a length value when length is set to AUTO You may receive t...

Page 174: ...alid only when Test is set to DATA or MUX Invalid Command Must be in MUX test This error message is caused by sending a command that is invalid when Test is set to 2M or DATA such as set txrx You may receive this message in response when you send any command that is valid only when Test is set to MUX Invalid Data Rate This error message is caused by sending an invalid data interfacetypewhenTestiss...

Page 175: ...o Such Event During Specified Time This error message is caused by requesting a Histogram Print when the selected histogram result has not occurred within the specified time You may receive this message in response when you send the following query misc prt hist Print Buffer Is Empty This error message is caused by requesting a Histogram Print when no Prints are pending You may receive this messag...

Page 176: ...d by requesting a Histogram Print when the start time is greater than the stored time You may receive this message in response when you send the following query misc prt hist Timeslot out of range This error message is caused by sending a timeslot value that is not within the range for the selected configuration You may receive this message in response when you send the following queries res rxbt ...

Page 177: ...sage is caused by sending an invalid display hold state parameter You may receive this message in response when you send the following command misc disp hold Unrecognized Error Insert State This error message is caused by sending an invalid error stateparameter Youmayreceivethismessageinresponse when you send the following command misc errin rate Unrecognized Error Type This error message is cause...

Page 178: ...sponse when you send the following command set hstt Unrecognized Pass Through Mode This error message is caused by sending an invalid pass through mode parameter You may receive this message in response when you send the following command set pthru Unrecognized Pattern This error message is caused by sending an invalid pattern parameter You may receive this message in response when you send the fo...

Page 179: ...ormessageiscausedbysendinganinvalidterminal typeparameter Youmayreceivethismessageinresponse when you send the following command set term Unrecognized Test Mode This error message is caused by sending an invalid test modeparameter Youmayreceivethismessageinresponse when you send the following command set tmod Unrecognized Test Type This error message is caused by sending an invalid test typeparame...

Page 180: ...nse when you send the following command set txclk Unrecognized Tx Coding Thiserrormessageiscausedbysendinganinvalidtransmit coding parameter You may receive this message in responsewhenyousendthefollowingcommand set txcod Volume out of range Thiserrormessageiscausedbysendinganinvalidvolume rangeparameter Youmayreceivethismessageinresponse when you send the following command misc vol ...

Page 181: ...n intrusive testing of 2048 kbit s links The primary advantage of in service testing is that the link under test does not have to be removed from service This means that no unnecessary down time is incurred In addition data or time specific problems can be hard to isolate using out of service methods ForanillustrationofhowtoconfiguretheINTERCEPTOR 147 to measure the overall performance of an in se...

Page 182: ...ou are using a printer set all printer related setup items as desired For more information see Section 5 Check the Time and Date items to verify they are set for the current time and date 5 RECEIVER control Press the RECEIVER control to select MON for connection at a resistor isolated monitor jack or BRIDGE for connection at a resistor isolated monitor point and to select 120Ω or 75Ω as appropriat...

Page 183: ...kbit s links terminating on the same DCS ACE 2 Check the STATUS ALARMS LEDs Verifyproperdetectionofsignal framing pattern and absence of alarms 3 Check for timing problems To check for timing problems perform a bit slip frame slip test See Section 7 8 7 3 OUT OF SERVICE TESTING A 2048 KBIT S CIRCUIT Out of service testing is performed by sending a test patternoveranewcircuitatinstallationtimeorane...

Page 184: ...o OFF not performing loopback testing or to the appropriate terminating equipment for the circuit under test CBITS or SA6BITS Set Tx Clock to INTERNAL or INT 2048K if Option 147 1 is installed Generally setPatterntoapseudorandompattern such as 2 15 1 or 2 23 1 These patterns are good choices because they simulate live traffic 4 Set ALARM SIGNAL category items SeteachtypeofTx AlarmtoOFF noalarmswil...

Page 185: ... connector connectthetestinstrumenttothereceivedirection of the circuit that is being tested 8 Connect to the TRANSMITTER connector Using the appropriate TRANSMITTER connector connect the test instrument to the transmit direction of the circuit that is being tested Test Results 1 Check the STATUS ALARMS LEDs Verifyproperdetectionofsignal framing pattern and absence of alarms 2 Check the SUMMARY Re...

Page 186: ...ker to monitor the voice channel with or without a test tone present to identify severe noise problems When a noise or level problem is reported on a voice circuit you can use the INTERCEPTOR 147 to help isolate the problem to a particular channel card in a PCM mux or to the 2048 kbit s circuit itself Figure 7 3 A D Testing of a Voice Channel Test Setup 1 Perform the Basic Setup Procedure Verify t...

Page 187: ...s the RECEIVER control to select MON or BRIDGEmodeasappropriateandtoselect120Ω or 75Ω as appropriate 7 Connect to the RECEIVER connector Using the selected RECEIVER connector connect the test instrument to the monitor point of the circuit that is being tested Test Results 1 Check the STATUS ALARMS LEDs Verifyproperdetectionofsignal framing pattern and absence of alarms 2 Monitor the timeslot over ...

Page 188: ...KBIT S CIRCUIT You can use the INTERCEPTOR 147 to isolate a fault on an Nx64 kbit s or Nx56 kbit s circuit Simply take the suspected adjacent timeslots out of service transmit an appropriate test pattern over the selected timeslots and check the error results at various points along the circuit As shown in Figure 7 4 the test pattern can be generated on the data customer side of an NTE by another ...

Page 189: ... PANEL LOCK and SELF LOOP LEDs are off 2 Set Test to 2M and set TEST MODE category items Set Test Mode to Nx64K Set Channel to NORMAL or RESTRICTED depending on the type of circuit under test Nx64 or Nx56 kbit s respectively 3 Set the CONFIGURATION category items Tomaximizebatterylife setTransmittertoOFF Set Pattern and Framing to AUTO or to the specific test pattern and framing being generated by...

Page 190: ...al Cross Connect System DCS MON NTE Loopback FIREBERD 6000 2 048 Mbit s Mux Customer Premises 2 048 Mbit s Line Timeslot x Timeslot y The Exchange 2 048 Mbit s Line 2 048 Mbit s Mux MON NTE INTERCEPTOR 147 TX RX INTERCEPTOR 147 TX RX INTERCEPTOR 147 TX RX Figure 7 4 Troubleshooting an Nx56 or Nx64 Kbit s Circuit ...

Page 191: ...eaker To specify the voice channel to be monitored select a receive timeslot in the RxTS item in the TIMESLOTS Setup category or in the Timeslot item in the CHAN SIGNALING Results category To adjust the volume of the speaker use the Volume Up and Down controls 3 Verify received frequency and signal level In the SIGNAL CODE FAS Results category verifyproperreceivedfrequencyandsignallevel 4 Check Ac...

Page 192: ...erall circuit performance For a diagram of a typical test setup see Figure 7 5 Figure 7 5 Troubleshooting a Customer s Nx64K Service Test Setup 1 Perform the Basic Setup Procedure Verify the PANEL LOCK and SELF LOOP LEDs are off 2 Set Test to 2M and set TEST MODE category items Set Test Mode to Nx64 or Mx64 as appropriate Set Channel to NORMAL or RESTRICTED depending on the type of circuit under t...

Page 193: ...ive traffic 4 Select the timeslots to be tested If the timeslots used in the transmit and receive direction are not the same then set Coupling to Tx Rx 5 Set ALARM SIGNAL category items Set each type of Tx Alarm to OFF so that no alarms are generated 6 Check AUXILIARY category items If you are using a printer set all printer related setup items as desired For more information see Section 5 Check t...

Page 194: ...ts as desired Check the results to determine if they meet acceptable limits so that the circuit can be qualified 4 If desired print histograms and results information 7 7 MONITORING 2048 KBIT S CIRCUITS FROM DS3 ACCESS POINTS You can use the INTERCEPTOR 147 in conjunction with a TTC T BERD 305 or a T BERD 310 DS3 Analyzer equipped with 2048 kbit s drop capability to monitor a 2048 kbit s circuit f...

Page 195: ...ured to generate a suitable test pattern such as 2 15 1 or 2 23 1 and has been configured to use the framing mode normally used on the 2048 kbit s circuit under test It is also assumed that the T BERD 305 or T BERD 310 has been properly configured to drop the 2048 kbit s circuit under test Test Setup 1 Perform the Basic Setup Procedure Verify the PANEL LOCK and SELF LOOP LEDs are off 2 Set Test to...

Page 196: ...he 2048 kbit s output from the T BERD 305 310 Test Results 1 Check the error results To analyze the performance of a 2048 kbit s link whileitisin service youcancheckthecircuit s CRC 4 error results frame FAS and MFAS errorresults orcodeerrorresults Whenavailable CRC 4 error results provide a good indication of overall link performance However note that Digital Cross connect Systems and Automatic C...

Page 197: ... clock recovered from the circuit with the 2M reference from the network equipment to measure any drift in the recovered clock from the reference clock An in service test can be performed using the MON or BRIDGE input Figure 7 7 Performing a Bit Slip or Frame Slip Test Test Setup 1 Perform the Basic Setup Procedure Verify the PANEL LOCK and SELF LOOP LEDs are off 2 Set Test to 2M and Test Mode to ...

Page 198: ...overifytheyaresetforthecurrenttimeanddate 5 Set RECEIVER control to MON Press the RECEIVER control to select MON when working from a resistor isolated monitor jack and to select 120Ω or 75Ω as appropriate 6 Set the CONFIGURATION category items Set Tx Clock to 2M REF Set 2M Ref Input to MON BRIDGE or TERM as appropriate 7 Connect to the RECEIVER connector Using the selected RECEIVER connector conne...

Page 199: ...d clock The Bit Slip value increments when the 2M reference is higher than the recovered clock frequency The Bit Slip value decrements when the 2M reference is lower than the recovered clock frequency 7 9 TESTING AT A DATA INTERFACE YoucanusetheINTERCEPTOR147totestdatainterfaces by replacing a DCE or a DTE such as a terminal or multiplexer and conducting a complete Bit Error test For a diagram of ...

Page 200: ...t all printer related setup items as desired For more information see Section 5 Check the Time and Date items toverifytheyaresetforthecurrenttimeanddate 5 Data Interface connector Using the appropriate data interface connector connect the test instrument to the circuit that is being tested Test Results 1 Observe the Data Interface LEDs and 147 front panel LEDs Watch the DATA INTERFACE LEDs to veri...

Page 201: ...l dBnom and Level Vpeak to verify proper levels 6 Check the PERFORMANCE Results category ChecktheresultsinthePERFORMANCEResults category to determine overall circuit quality 7 Print histograms and results information if desired 7 10 TESTING MULTIPLEXED DATA TO 2048 KBIT S CIRCUITS In a multiplex test you can insert a test pattern on a data circuit and check that circuit after it has been multiplex...

Page 202: ... TIMESLOTS category items Select the timeslot onto which you expect the data to be multiplexed on the 2 Mbit s side 5 Check AUXILIARY category items If you are using a printer set all printer related setup items as desired For more information see Section 5 Check the Time and Date items toverifytheyaresetforthecurrenttimeanddate 6 Set RECEIVER control to appropriate setting Press the RECEIVER cont...

Page 203: ...lts category 3 Check the SUMMARY Results for any errors or events 4 Check the SL Delay In the LOGIC TIME Results category check the signal lead delay SL Delay at the DTE DCE interface 5 Verify received frequency and ppm In the SIGNAL CODE FAS Results category check Freq and Freq ppm to verify the receive frequency is at the proper rate and to check for evidence of drift Also check Level dBnom and ...

Page 204: ...r a diagram of a typical test setup see Figure 7 10 Figure 7 10 Testing Demultiplexed 2 Mbit s to Data Circuits Test Setup 1 Perform the Basic Setup Procedure Verify the PANEL LOCK and SELF LOOP LEDs are off 2 Set Test to MUX and set TEST MODE category items Set TX RX to 2M DATA Set Intf to the interface used on the data circuit Set 2M to the bandwidth used on the 2 Mbit s circuit 2 Mbit s circuit...

Page 205: ...Date items toverifytheyaresetforthecurrenttimeanddate 6 Connect to the TRANSMITTER connector Using the appropriate TRANSMITTER connector connect the test instrument to the 2 Mbit s side of the component DCE under test 7 Connect to the Data Interface connector Using the appropriate data interface connector connect the test instrument to the data circuit that is being tested Test Results 1 Observe t...

Page 206: ... 6 Check the PERFORMANCE Results category In the PERFORMANCE Results category the G 821 Performance results provide an excellent means of verifying overall quality of the link under test 7 Print histograms and results information if desired 7 12 NOTES REGARDING ROUND TRIP DELAY To measure Round Trip Delay use the following steps Test Setup 1 Set up the test instrument Set Framing Interface etc as ...

Page 207: ... LEDs Verify signal presence and appropriate frame synchronization NOTE Pattern synchronization does not apply for Round Trip Delay testing 5 Press the RESTART control to begin each measurement 6 Check the RT Delay Round Trip Delay result Check in the LOGIC TIME or SUMMARY Results category ...

Page 208: ...Applications 7 28 7 INTERCEPTOR 147 2 Mbit s and Data Analyzer ...

Page 209: ...it s signals 8 1 1 Framing The INTERCEPTOR 147 can process signals with the following CCITT G 704 framing formats FAS with or without CRC 4 MFAS with or without CRC 4 Unframed 8 1 2 2 Mbit s Channel Access The INTERCEPTOR 147 can access signals at the following levels 64 kbit s and 56 kbit s timeslots for VF or error analysis Contiguous Nx or Non contiguous Mx 56 or 64 kbit s timeslot access ...

Page 210: ...You can set different values for each of the VOICE channels 8 1 4 Transmitter The specifications for the INTERCEPTOR 147 s Transmitter follow 8 1 5 Clock Sources The following clock sources are available with the INTERCEPTOR 147 Internal 2 048 MHz 5 ppm stability Recovered Offset 50 100ppmwith5ppmstability Option 147 1 External Option 147 1 8 1 6 Encoding The INTERCEPTOR 147 can process 2 Mbit s s...

Page 211: ...IN PRINTER REMOTE CONTROL port 8 1 8 Generator The generator can generate the following patterns and errors Fixed Patterns Mark Space 1 1 1 3 1 4 Program Byte Pseudorandom Patterns 26 1 Q6 Q5 29 1 CCITT V 52 211 1 CCITT O 152 215 1 CCITT O 151 220 1 CCITT V 57 223 1 CCITT O 151 Other Patterns QRSS Delay Tone 1020 Hz nominal 0 dBm Logic Code Error Single or 10 3 rate Insertion FAS Error Insertion S...

Page 212: ...nced or 75Ω unbalanced Bridge mode 2 kΩ Monitor mode 120Ω balanced or 75Ω unbalanced 8 1 10 Signal Analysis The following specifications are for signal analysis Frequency Measurement 56kHzto2 048MHz 5ppm VF Peak Code 127 to 127 VF Channel Level 60 to 3 dBm 2 048 Mbit s Peak 0V to 7V 3 Voltage 2 048 Mbit s Level 36 to 7 4 dBnom 0 3 dB 8 1 11 Compliance with CCITT Recommendations TheINTERCEPTOR147al...

Page 213: ...ge circuits 140 141 142 are terminated Unterminated Mode All signals are unterminated 8 3 V 35 DATA INTERFACE TousetheV 35datainterface youmustusetheappropriate adapter cable The following specifications apply to the V 35 interface Electrical Interfaces CCITT V 35 Recommendation 1976 The interface implemented is actually a V 35 306 interface which includes capabilities normally associated with V 1...

Page 214: ...trical Interface CCITT Recommendation V 11 8 5 V 24 DATA INTERFACE The following specifications apply to the V 24 interface Electrical Interface CCITT Recommendation V 28 above 20 kbit s complies with EIA RS232C Interchange Circuits 102 103 104 105 106 107 108 2 109 113 128 114 140 141 142 Timing Modes The V 24 interface can process both asynchronous and synchronous timing modes Data Rates For the...

Page 215: ...nput Signal Level 0 dB to 3 dB of twisted pair cable attenuation 8 7 PRINTER REMOTE CONTROL INTERFACE The INTERCEPTOR 147 s PRINTER REMOTE CONTROL interface on the top of the test instrument allows you to connect a printer or a remote controller The following specifications are used with the PRINTER REMOTE CONTROL interface Format The INTERCEPTOR 147 can printto80 columnprintersand to 40 column pr...

Page 216: ...tions In non volatile memory you can store up to 10 complete configurations for the test instrument thefront panelswitchsettingsandsetupselections that were current at the time of power off In the Print Buffer s non volatile memory you can store more than 50 Results Prints or up to 500 Event Prints In the histogram buffer s non volatile memory you can store 1000 event seconds of information ...

Page 217: ...Dimensions 9 1 cm 3 6 in High 11 4 cm 4 5 in Wide 21 8 cm 8 6 in Deep Weight 1 8 kg 4 0 lbs Operating Temperature 0 to 45 C 32 to 113 F Storage Temperature 40 to 70 C 40 to 158 F 8 8 3 Power Specifications Power Requirements 4 2 W Battery Type Sealed lead acid Rating 6V 2 4 A Hr Operation 3 6 hours depending on mode Charging Time 8 hours unit not operating ...

Page 218: ...Specifications 8 10 8 INTERCEPTOR 147 2 Mbit s and Data Analyzer ...

Page 219: ...r does not operate as expected 9 2 1 If Your Test Instrument Fails to Turn On If the test instrument fails to operate and no front panel indicatorsilluminate thetestinstrument sinternalbattery mayneedcharging ConnecttheACMainspoweradaptor to your test instrument and then to AC Mains power If the BATTERY CHARGING indicator does not illuminate check the connections If the BATTERY CHARGING indicator ...

Page 220: ... general follow the Basic Setup Procedure It is important to use this top down approach because some items in later categories do not appear unless related items in earlier categories have been selected first If your test instrument appears to be reporting false errors verify that the RECEIVER mode is set up properly If your test instrument cannot achieve framing or patternsynchronization trysetti...

Page 221: ...fter shipment to the customer Cables printers accessories breakout boxes and all equipment other than the above mainframe will be repaired or replaced at our option at no charge for a period of one 1 year after shipment to the customer Liability under this warranty extends only to the replacementvalueoftheequipment Thiswarrantyisvoid under the following conditions Equipment has been altered or rep...

Page 222: ...Repair Report furnished with the returned equipment 9 3 3 Out of Warranty Service The procedure for repairing out of warranty equipment is the same as that used for equipment still in warranty However there is a minimum charge applied to each requestforout of warrantyservice Theminimumcharge guaranteesthecustomeranestimateoftherepaircostsand is used as credit against actual materials and labor cos...

Page 223: ...section 9 3 5 Equipment Return Instructions When you return equipment for repair attach a tag that includes the following information Owner name and address A list of the equipment being returned including the serial number of each piece of equipment A detailed description of the problem or service requested The name and telephone number of the person to contact regarding questions about the repai...

Page 224: ...or or contact TTC at the numbers or address listed below Phone From the United States or Canada dial 1 800 638 2049 or 1 301 353 1550 From outside the United States or Canada 01 301 353 1550 International Ask for Customer Service FAX 1 301 353 0731 USA and Canada 01 301 353 0731 International Attention Customer Service Mailing Address Attn Customer Service TTC CEPT Telecom Test 20400 Observation D...

Page 225: ...514 879 1820 TTC Toronto 905 507 4117 TTC Vancouver 604 436 0855 In Europe TTC Europe 0 89 8116935 In France TTC France 0 1 30 48 83 00 or 0 1 30 48 83 90 In Germany TTC Friedrichsdorf 0 6172 77055 TTC Munich 0 89 907874 In Ireland TTC Ireland 353 18 251 355 In the UK TTC UK Ltd 44 293 617700 In Hong Kong TTC Hong Kong 852 529 0356 ext 288 ...

Page 226: ...9 9 8 INTERCEPTOR 147 2 Mbit s and Data Analyzer Maintenance and Service ...

Page 227: ...tor at one end to plug into the test instrument s PRINTER REMOTE CONTROL port and a 25 pin male D type connector at the other end to plug into the printer or the remote controller When connected to a printer or remote controller the INTERCEPTOR 147 acts as a DCE The pins used on the PRINTER REMOTE CONTROL interface and their associated functions are listed below Pin Number Pin Number on 8 pin on 2...

Page 228: ...Printer Remote Control Interface A 2 A INTERCEPTOR 147 2 Mbit s and Data Analyzer ...

Page 229: ... and data leads are used depending on setup selections B 1 DATA COMMUNICATION LEADS The Data communication interface leads that can be used are listed below RTS Request to Send LL Local Loop Loops up the closest DCE RL RemoteLoop LoopsupthefarthestDCE DTR Data Terminal Ready CTS Clear to Send TM Test Mode RLSD Received Line Signal Detector DSR Data Set Ready RS Request to Send CS Clear to Send TR ...

Page 230: ...4 V 35 V 11 X 21 114 Transmit Clock DCE TC ST 103 Transmit Data TD SD T 113 Transmit Clock DTE XTC TT 104 Receive Data RD RD R 115 Receive Data RC RT S Figure B 1 DCE to DTE Interface Diagram B 3 PIN ASSIGNMENTS FOR DATA COMMUNICATION INTERFACES The tables in this subsection indicate the pin assignments for the cables used for the indicated data interfaces In all the tables CCITT pin number 108 re...

Page 231: ...E Crossover Cable Pin Assignments Description CCITT V 24 To 147 To DTE Ref Name DB25 DB25 Male Female Shield 1 1 Tx Data 103 TD 2 3 Rx Data 104 RD 3 2 Request to Send 105 RC 4 8 Clear to Send 106 CTS 5 18 Data Set Ready 107 DSR 6 20 Signal Ground 102 SGND 7 7 Rx Line Signal 109 RLSD 8 4 Detector Tx Signal 114 TC 15 24 Element Timing DCE Local Loopback 141 LL 18 DTE Ready 108 DTR 20 6 Remote 140 RL...

Page 232: ...ale Shield 1 1 ST DCE DCE ST A 3 5 SCT DCE Send Data 103 SD A 4 6 Send Timing 114 ST A 5 17 DCE Source Receive Data 104 RD A 6 4 Request to Send 105 RS A 7 13 Clear to Send 106 CS A 9 10 Local Loop 141 LL 10 9 Data Mode 107 DM A 11 12 Terminal Ready 108 TR A 12 11 Receiver Ready 109 RR A 13 7 Remote Loopback 140 RL 14 18 Terminal Timing 113 TT A 17 8 DTE Source ST DCE DCE ST B 21 23 SCT DCE Send D...

Page 233: ...e B 2 V 11 DCE Crossover Cable Pin Assignments Continued Description CCITT V 11 To 147 To DTE Ref Name DB50 DB37 Male Female Terminal Ready 108 TR B 30 29 Receiver Ready 109 RR B 31 25 Signal Ground 102 SG 40 19 RC 44 20 Terminal Timing 113 TT B 46 26 DTE Source Test Mode 142 TM 49 14 ...

Page 234: ... DB50 DTE Male V 35 Protective 101 Prot Gnd 1 A Ground Serial Clock 114 DCE 3 Y Transmit A SCT A Send Data A 103 SD A 4 R Serial Clock 114 SCT A 5 U Transmit A Received 104 RD A 6 P Data A Request to Send 105 RS 7 F Clear to Send 106 CS 9 L Local Loop 141 LL 10 D Data Set Ready 107 DSR 11 H Data Terminal 108 DTR 12 E Ready Received Line 109 RLSD 13 C Signal Detector Remote Loop 140 RL 14 NN Serial...

Page 235: ...E B 46 X Transmit External B Test Mode 142 TM 49 N X 21 DCE Crossover Cable The table below lists the pin assignments for the X 21 DCE crossover cable The X 21 DCE crossover cable is a 15 pin D type male to a a 15 pin D type female Table B 4 V 21 DCE Crossover Cable Pin Assignments Description CCITT X 21 To 147 To DTE Ref Name DB15 DB15 Male Female Shield FGND 1 1 Tx Data A 103 T A 2 4 Rx Data A 1...

Page 236: ...to 105 C B 10 12 Send B Receiver 109 106 I B 12 10 Ready B Rx Signal 115 S B 13 14 13 Element Timing B 64k G 703 Adapter Cable The table below lists the pin assignments for the 64k G 703 adapter cable The 64k G 703 adapter cable is a 50 pin D type male to dual 3 pin Siemens Table B 5 64k G 703 Adapter Cable Pin Assignments Description Signal To 147 To DCE Name DB50 3 pin Male Siemens Transmit T 47...

Page 237: ...e male special connector to a a 37 pin D type male connector Table B 6 V 11 DTE Adapter Cable Pin Assignments Description CCITT V 11 To 147 To DCE Ref Name DB 50 DB37 Male Male Shield 1 1 ST DTE DTE ST 3 3 SCT DTE A Send Data 103 SD 4 4 A Send Timing 114 ST A 5 5 DTE Source Receive Data 104 RD A 6 6 Request to Send 105 RS A 7 7 Receive Timing 115 RT A 8 8 DTE Source Clear to Send 106 CS A 9 9 Loca...

Page 238: ... Loopback 140 RL 14 14 Terminal Timing 113 TT A 17 17 DCE Source ST DTE DTE ST B 21 21 SCT DTE Send Data 103 SD B 22 22 Send Timing DTE Source 114 ST B 23 23 Receive Data 104 RD B 24 24 Request to Send 105 RS B 25 25 Receive Timing 115 RT B 26 26 DTE Source Clear to Send 106 CS B 27 27 Data Mode 107 DM B 29 29 Terminal Ready 108 TR B 30 30 Receiver Ready 109 RR B 31 31 Signal Ground 102 SG 40 19 R...

Page 239: ...le Table B 7 V 35 DTE Adapter Cable Pin Assignments Description CCITT Signal To 147 To DCE Ref Name DB50 V 35 Male Male Protective 101 Prot 1 A Ground Gnd Serial Clock 114 DTE 3Z Transmit A Send Data A 103 SD A 4 P Serial Clock 114 SCT A 5 Y Transmit A Received 104 RD A 6 R Data A Request to Send 105 RS 7 C Serial Clock 115 SCR A 8 V Receive A Clear to Send 106 CS 9 D Local Loop 141 LL 10 L Data S...

Page 240: ...12 H Ready Received Line 109 RLSD 13 F Signal Detector Remote Loop 140 RL 14 N Serial Clock 115 SCTE A 17 U Transmit External A Serial Clock 114 DTE 21 BB Transmit B SCT B Send Data B 103 SD B 22 S Serial Clock 114 SCT B 23 AA Transmit B Received Data B 104 RD B 24 T Serial Clock 115 SCR B 26 X Receive B Signal Ground 102 SGND 40 B Signal Ground SGND 44 EE Serial Clock 115 SCTE 46 W Transmit B Ext...

Page 241: ...cable Rcv Clk selections on the INTERCEPTOR 147 see the figures in this section In the figures the shaded lines indicate the clock source for the specified selections DTE INTF For a figure of the signal leads used when Emulate is set to DTE and Gen Clk is set to INTF see Figure B 2 Figure B 2 DTE INTF Diagram DCE INTERCEPTOR 147 emulating a DTE SYNTH CLK DATA RX GEN CLK SEL DATA TX INTF INTRL TC F...

Page 242: ...EL DATA TX INTF INTRL TC From DTE TC From DCE TD TD RC RD INTERCEPTOR 147 emulating a DTE Figure B 3 DTE INTRNL Diagram DCE INTRNL TT For a figure of the signal leads used when Emulate is set to DCE Gen Clk is set to INTRNL and Rcv Clk Sel is set to TT see Figure B 4 Figure B 4 DCE INTRNL Diagram DTE DATA RX SYNTH CLK RCV CLK SEL DATA TX INTF INTRL TC From DTE TD TC From DCE RC RD GEN CLK SEL TT S...

Page 243: ... a figure of the signal leads used when Emulate is set to DCE Gen Clk is set to INTRNL and Rcv Clk Sel is set to ST see Figure B 5 DTE INTERCEPTOR 147 emulating a DCE DATA RX SYNTH CLK RCV CLK SEL DATA TX INTF INTRL TC From DTE TD TC From DCE RC RD GEN CLK SEL TT ST Figure B 5 DCE INTRNL ST Diagram ...

Page 244: ...s set to DCE Gen Clk is set to INTF and Rcv Clk Sel is set to TT see Figure B 6 DTE INTERCEPTOR 147 emulating a DCE DATA RX SYNTH CLK RCV CLK SEL DATA TX INTF INTRL TC From DTE TD TC From DCE RC RD GEN CLK SEL TT ST Figure B 6 DCE INTF TT Diagram DCE INTF ST Setting Emulate to DCE Gen Clk to INTF and Rcv Clk Sel to ST is not a valid combination ...

Page 245: ...yteRegister EventStatusRegister TestSummary Register Remote Alarms Register AIS Alarms Register and Line History Register see Figure C 1 Figure C 1 INTERCEPTOR 147 Registers Each group of registers captures specific events Within each group of registers is a status register composed of 8 bits representing up to 8 events When a specific event occurs thecorrespondingbitissetto1 Theusermayread each s...

Page 246: ... an associated query Users may use an associated command to write a value to enable registers The CLS command clears all event registers buffers and queues except the output queue Register Operation Example In Figure C 2 the value 36 has been written to Enable Register 1 This value sets bits 2 and 5 of Enable Register 1 Sincebit5ofbothStatusRegister1andEnableRegister 1 is set the summary bit is se...

Page 247: ... by using the STATUS PRINT query The Error Buffer is an internal buffer used to store the last generated error message The Error Buffer is read using the STATUS ERROR query and is cleared using the STATUS CLEAR_ERR command When an error message is present in the Error Buffer the Error Available indicator bit0oftheStatusByteRegister issetto1 Error messages are also transmitted directly to the termi...

Page 248: ...ned as a Master Summary Status MSS When the Status Byte Register is read a binary weighted integer is returned This integer represents the decimal equivalent of the enabled bits in the register Convert the returned value to binary to determine the status of the bits in the Status Byte Register Bit 7 Not Defined Always set to 0 Bit 6 MSS Master Status Summary Represents the summary of all other bit...

Page 249: ...lable Indicates that a printout is available in the remote control print queue See the STATUS PRINT remotecontrolcommand Bit 0 EAV Error Message Available Indicates that an error message is available in the error buffer See the STATUS ERROR and STATUS CLEAR_ERR remote control commands The Status Byte Enable Register is an 8 bit register that determines which bits of the Status Byte Register can ca...

Page 250: ...vents to each of the bits within the register A bit is set in the Event Status Register when the event that corresponds to that bit has occurred since the register was last read or cleared This register is cleared each time it is read Bit 7 PON Power On Power has been cycled OFF and ON since the last time the Event Status Register was read Bit 6 URQ User Request Not used Always reads 0 EVENT STATU...

Page 251: ... INTERCEPTOR 147 output queue when nothing was available to be read or that data in that queue has been lost Bit 1 RQC Request Control Not used Always reads 0 Bit 0 OPC Operation Complete Reports that all pending operations are complete Seethe OPCcommoncommand TheEventStatusEnableRegister ESE isan8 bitregister that allows the controller to enable or disable each bit in the Event Status Register Wh...

Page 252: ...ts are used Figure C 5 Test Summary Register Bit 7 Not defined Always set to 0 Bit 6 Not defined Always set to 0 Bit 5 Not defined Always set to 0 Bit 4 Not defined Always set to 0 Bit 3 Not defined Always set to 0 Bit 2 Not defined Always set to 0 Bit 1 Alarm Status Summary Bit Bit 0 Line Status Summary Bit TEST SUMMARY REGISTER status test TEST SUMMARY ENABLE REGISTER status test_en ALARM SUMMAR...

Page 253: ...rs is used to detect the state of the signal presence indicator the various FAS Sync indicators the pattern slip indicator and an alarm indicator See Figure C 6 Figure C 6 Line Status Register Group LINE HISTORY REGISTER status line_hist LINE ENABLE REGISTER status line_en LINE STATUS SUMMARY TEST SUMMARY REGISTER status test LINE STATUS REGISTER status line HDB3 CRC PATTERN INVERT PATTERN SYNC MF...

Page 254: ...e INTERCEPTOR 147 has detected pattern inversion Bit 3 PATTERN SYNC Set to 1 when the INTERCEPTOR 147 has detected pattern sync Bit 2 MFAS SYNC Set to 1 when the INTERCEPTOR 147 has detected MFAS Sync Bit 1 FAS SYNC Set to 1 when the INTERCEPTOR 147 has detected FAS Sync Bit 0 SIGNAL PRESENT Set to 1 when the INTERCEPTOR 147 detects that an input signal is present The Line History Register provide...

Page 255: ...ndicatesthatPATTERNSyncwaslostsince this register was last read Bit 2 MFAS SYNC Indicates that MFAS Sync was lost since this register was last read Bit 1 FAS SYNC Indicates that FAS Sync was lost since this register was last read Bit 0 SIGNAL PRESENT Indicates that signal presence was lost since this register was last read The Line Enable Register is used to determine how the Line Status Summary b...

Page 256: ...esenceindicator thevariousFASSyncindicators the pattern slip indicator and an alarm indicator The Alarm Status Register is read with the query STATUS ALARM The bit grouping is as follows Bit 7 Not Used Always set to 0 Bit 6 Not Used Always set to 0 Bit 5 Not Used Always set to 0 Bit 4 Not Used Always set to 0 ALARM HISTORY REGISTER status alarm_hist ALARM ENABLE REGISTER status alarm_en ALARM STAT...

Page 257: ...e Alarm History Register was last read A set bit generally indicates that an error has occurred or synchronization was lost during the interval since the register was last read The Alarm History Register is read using the query STATUS ALARM HIST Bit 7 Not Used Always set to 0 Bit 6 Not Used Always set to 0 Bit 5 Not Used Always set to 0 Bit 4 Not Used Always set to 0 Bit 3 MFAS Distant Indicates t...

Page 258: ...s that AIS was detected since this register was last read The Alarm Enable Register is used to determine how the Alarm Status Summary bit of the Test Summary Register is set The Alarm Status Summary bit is set when corresponding bits in the Alarm History Register and the Alarm Enable Register are set ...

Page 259: ... Theperformanceresults availableintheINTERCEPTOR 147 s PERFORMANCE results category are derived by observing the received bit error counts and received bit counts at 1 second intervals and classifying each 1 secondintervalasavailable unavailable severelyerrored orerrorfreeseconds Thisdivisionoftesttimeisillustrated in Figure D 1 Further calculations yield the number and percentage of degraded minu...

Page 260: ...avlSec totalsecondsafterinitial pattern synchronization After initial pattern synchronization seconds are consideredtobeavailabletime theAvlSecsbegincounting seconds that occur before initial pattern synchronization are not included in performance analysis These seconds continue to be counted until 10 consecutive seconds each with a BER greater than 10 3 occur A sliding window 10 seconds in length...

Page 261: ...3 are also included in the count of severely errored seconds SES which are those seconds with a BER greater than 10 3 that occur in available time A signal loss second or a second in which pattern synchronization is lost is also considered to be a second with a BER greater than 10 3 Therefore the current test result values for the Avl Sec count 29 the SES count 3 and the Unavl Sec count 0 Figure D...

Page 262: ...secutivesecondseachhaving a BER worse than 10 3 At this point the transition is made to unavailable time Those 10 seconds which had been counted as Avl Sec are deducted from the Avl Sec count and are added to the Unavl Sec count the Avl Sec count becomes 79 and the Unavl Sec count becomes 10 Those same 10 seconds were also included in the SES count However SES is limited to only those seconds in a...

Page 263: ...ailable time A BER less than 10 3 also occurs for the 152nd through the 160th seconds Since there are now 10 consecutive seconds with aBERlessthan10 3 thetransitionismadefromunavailable time to available time As each of these 10 seconds occurred it was added to the Unavl Sec count Unavl Sec 81 Avl Sec 79 and SES 3 Now that those consecutive seconds have triggered the transition to available time t...

Page 264: ...ransition from available time to unavailable time the Deg Min result is unaffected This is because a switch to unavailable time requires 10 consecutive seconds each withaBERgreaterthan10 3 Anysecondinavailabletime with a BER greater than 10 3 is considered to be a severely errored second and therefore not included in the accumulation of seconds used to calculate Deg Min Moving from unavailable tim...

Page 265: ...ter Mode of GRAPH or ASCII when the Printer Mode is ASCII the bars are replaced with columns of asterisks In the sample histogram see Figure E 1 the circled numberscorrespondtothenumbersusedintheexplanations that follow the diagram Figure E 1 Sample Histogram Graph 10K 9K 8K 7K 6K 5K 4K 3K 2K 1K 0 00 00 00 42 01 25 02 07 02 50 03 32 04 15 M B i t E r r s Storage Power Bit Errs vs Time HISTOGRAM PR...

Page 266: ... transition bars indicate changes or transitions that occurred during the histogram period that affect the availability of histogram information The Av T transition bar is included in histograms of one of the performance results SES Err Sec or Unavl Sec if sometime during the histogram period atransitionwasmadeawayfromAvailable Time The Storage transition bar is included in the histogram if someti...

Page 267: ...ors are automatically evenly spread along the X axis ranging from 00 00 to the time set up in the AUXILIARY setup category s Len item To correlate the time with real time add the relative time indicated on the X axis to the real time 8 Information About the Histogram The following information about the histogram is provided Start of Acquisition Time when the histogram buffer was turned on StartofP...

Page 268: ...nute Secondformat coveredby each results bar Two results bars can fit between two consecutive marks on the x axis Last Second of Data DD HH MM SS Timewhenthelastpieceofdatawascollected and reported E 2 UNDERSTANDING HISTOGRAM LISTS Histogram Lists are generally used when you are going to use the histogram information in a spreadsheet The LIST type histogram presents the information in an 80 column...

Page 269: ...1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 5 5 0 2 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 1 5 1 Modechng 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 5 0 0 1 0 0 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 0 5 1 1 5 4 3 2 Figure E 2 Sample List Histogram Print 1 Time and Date of Print At the top of Histogram Print is the time and date when the histogram was cre...

Page 270: ...y after power up 5 Information About the Histogram At the bottom of the List Histogram is a list of information about the histogram This information is the same as is reported with Graph histograms Start Of Acquisition Start Of Print DD HH MM Duration Of Print DD HH MM Seconds Per Bar Seconds Seconds Per Bar DD HH MM SS Last Second Of Data DD HH MM SS 23 49 42 30 Oct 1994 00 00 00 00 04 15 255 00 ...

Page 271: ... kbit s operation 3 4 56K 2M side of a Mux Test 3 7 64 kbit s operation 3 4 64K 2M side of a Mux Test 3 7 64k G 703 interface 3 6 64K Test Mode 3 4 75 Ω Connector 2 4 9V DC Connector 2 22 A ABCD Result 4 11 AC Mains ADAPTER Connector 2 22 Active Timeslots definition 4 11 Active Timeslots Result 4 11 Adjacent FAS Errs item 3 42 ALARM SIGNAL Category 3 34 ALARMS 3 45 Alarms trigger Print 3 45 AMI co...

Page 272: ...Out Procedure 1 6 CLEAR Control 2 21 Clearing histogram buffer 5 6 History LEDs 2 13 memory 3 56 Print buffer 2 21 Code Errs Result 4 6 Code Rate Result 4 6 Configuration recalling 3 54 saving 3 53 CONFIGURATION Category 3 8 Connecting to a Printer 2 23 Connectors data interface 2 8 CONTROLS Control 2 21 Coupling item 3 33 CRC Errs Result 4 7 CRC MF Wrd Result 4 9 CRC Rate Result 4 7 Current Statu...

Page 273: ...AD 3 45 FRAME 3 44 LOGIC 3 45 SIGNAL 3 44 Event item 3 44 Event Prints 3 43 EXTERNAL CLOCK connector 2 7 External power 1 5 F FAS 3 13 FAS Errs Result 4 6 FAS Rate Result 4 6 FAS Results item 3 55 FAS Word Result 4 7 FAS CRC 3 13 FOX pattern 3 22 FRAME 3 44 Frame Slip Result 4 6 Framing FAS 3 13 FAS CRC 3 13 MFAS 3 13 MFAS CRC 3 14 selecting 3 12 Framing item 3 12 Freeze the display 2 17 Freq ppm ...

Page 274: ...Inserting Errors 2 5 INT 2048K Clock Source 3 15 INTERCEPTOR 147 Applications 1 2 Key features 1 2 Standard Equipment 1 5 Interface configuring 3 6 INTERNAL Clock Source 3 14 INTF Gen Clk 3 28 Intf item 3 6 INTRNL Gen Clk 3 28 L Language Item 3 40 LCD 2 18 LCD Back light 1 6 Len item 3 52 Level dBnom Result 4 6 Level Vpeak Result 4 6 Level Result 4 12 Liquid Crystal Display 2 18 LIST Historgram Fo...

Page 275: ...t Mode 3 4 N NFAS Word Result 4 7 NORMAL 3 5 Nx56K 2M side of a Mux Test 3 7 Nx64K 2M side of a Mux Test 3 7 Nx64K Test Mode 3 4 O Octet Timing item 3 27 P PANEL LOCK 2 17 6 2 Patt Loss Result 4 3 Patt Slip Result 4 3 Pattern selecting 3 20 Pattern item 3 20 Peak Result 4 12 Percentage EFS Result 4 14 4 15 Percentage of Available Seconds Result 4 13 Percentage of Available Time Result 4 14 Percent...

Page 276: ...MED 3 43 Timed Print 5 4 Program Pattern item 3 23 Program Recall item 3 54 Program Store item 3 53 Prt Type item 3 46 R Rate selecting 3 24 3 25 Rate item 3 24 3 25 Rcv Clk Pol item 3 26 Rcv Clk Sel item 3 25 Rcv Pat Result 4 3 REBE Errs Result 4 9 REBEs Item 3 14 Receive Byte Result 4 11 Receive Pattern Result 4 3 RECEIVER 2 13 BRIDGE mode 2 16 connectors 2 14 control and LEDs 2 14 MON mode 2 14...

Page 277: ... 4 6 CRC Errs 4 7 CRC MF Wrd 4 9 CRC Rate 4 7 Date 4 4 Deg Min 4 14 EFS 4 14 Elpsd Sec 4 3 Err Sec 4 14 Err SES 4 14 FAS Errs 4 6 FAS Rate 4 6 FAS Word 4 7 Frame Slip 4 6 Freq 4 5 Freq ppm 4 5 Level 4 12 Level dBnom 4 6 Level Vpeak 4 6 MFAS Errs 4 7 MFAS Rate 4 7 MFAS Word 4 8 NFAS Word 4 7 Patt Loss 4 3 Patt Slip 4 3 Rcv Patt 4 3 REBE Errs 4 9 RT Delay 4 4 Rx Byte 4 11 Sa6Bits 4 9 SES 4 13 SL Del...

Page 278: ...ing 2 19 SIGNAL 3 44 SIGNAL CODE FAS Results 4 5 Signal Lead Delay Result 4 4 Signaling Bits selecting 3 37 setting 3 37 Site ID Item 3 42 SL Delay Result 4 4 Speaker description 2 20 when active 3 4 Start item 3 51 Starting a new test 2 17 STATUS DATA INTERFACE 2 5 SUMMARY Results 4 1 Causes beeper to beep 3 55 T TERM 2M Ref 3 16 Terminate Mode 2 15 Test restart 1 10 setting 3 3 starting a new 1 ...

Page 279: ...x Idle ABCD item 3 37 Tx MFAS item 3 36 Tx NFAS item 3 35 TX to RX item 3 5 TxTS Transmit Timeslots page 3 32 U Unavl Sec Result 4 13 UNFRAMED 3 13 Unfreeze the display 2 17 Up Down Arrows in display 2 18 V V 11 T U item 3 27 V 11 interface 3 6 V 24 ASYNC 3 6 pattern used for 3 22 V 24 SYNC 3 6 V 24A Data Bits item 3 27 V 24A Parity item 3 26 V 24A Stop Bits item 3 27 V 35 Interface V 35 306 imple...

Page 280: ...Index INDEX 10 INTERCEPTOR 147A 2Mbit s Analyzer ...

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