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Содержание 4934A

Страница 1: ...truments with serial numbers prefixed 3648U For additional important information about serial numbers see INSTRUMENTS COVERED BY MANUAL in Chapter 3 HEWLETT PACKARD HP Part No 04934 90054 Printed in U K November 1998 Copyright Hewlett Packard Ltd 1998 ...

Страница 2: ...HP 4934A Transmission impairment Measuring Set and Accessories Supplied ...

Страница 3: ...easurements directly on leased lines or on dial up lines It has loop holding capability a monitor speaker and butt in connection useful for talking to the far end of the test line There are four permanently stored frequencies 404 Hz 1004 Hz 2804 Hz and 2713 Hz Any other four frequencies may be temporarily assigned or stored by the user J The HP 4934A can test circuits using single frequency SF sig...

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Страница 5: ...t Circuit 2 1 Dial and Hold 2 2 Dialing using the HP 4934A and a Bott in 2 3 Receiving an Incoming Call and Holding the Line 2 4 Level and Frequency 2 5 Principles 2 5 Instrument Operation 2 7 Message Circuit Noise 2 10 Principles 2 10 How it is Measured 2 11 Instrument Operation 2 12 Noise with Tone Notched Noise 2 13 Principles 2 13 How it is Measured 2 13 Instrument Operation 2 14 Signal to Noi...

Страница 6: ...2 23 Principles 2 23 How it is Measured 2 23 Instrument Operation 2 24 3 General Information Introduction 3 1 About this Version 3 1 Specification 3 2 Safety Information 3 2 General 3 2 Safety Symbols 3 3 Statement of Compliance 3 5 Electromagnetic Compatibility EMC Information 3 5 Instruments Covered by Manual 3 7 Options Available 3 8 Accessories Supplied 3 9 Accessories Available 3 9 Specificat...

Страница 7: ...4 4 Operating Environment 4 4 Cleaning 4 4 Noise Declaration 4 5 Storage and Shipment 4 5 Environment 4 5 Packaging 4 5 5 Performance Tests Introduction 5 1 Calibration Cycle 5 1 Recommended Test Equipment 5 2 Operational Verification 5 3 Receiver Frequency 5 4 Receiver Level 5 5 Weighting Filters 5 6 Impulse Noise Count 5 9 Loss of Holding Tone 5 10 Hold Circuit 5 11 Dynamic Hold Circuit 5 13 Per...

Страница 8: ... 5 34 Notch Filter Rejection 5 36 Signal to Noise Ratio Accuracy 5 37 Impulse Noise Threshold Accuracy 5 39 Noise to Ground Accuracy 5 41 Peak to Average Ratio P AR Accuracy 5 43 6 Software Downloading Introduction 6 1 Quick Download Procedure 6 2 About the DOWNLOAD Program 6 3 7 Remote Control Introduction 7 1 The Serial Port 7 2 Serial Port Type 7 2 Baud Rates 7 2 Cable Pinout 7 3 Null Modem 7 3...

Страница 9: ...ctivating Remote Mode 7 4 Control Commands 1 5 Query Commands 7 8 Results Display DISP Format 7 8 Range Error Messages 7 9 A Service Accessory 1 SAl 20 dB Amplifier 4 kHz Filter Performance Test A 1 B Service Accessory 2 SA2 Power Splitter Adder Performance Test B 1 ...

Страница 10: ...Contents ...

Страница 11: ...tch on the HP 4934A by pressing the ON STBY key The instrument automatically does a self test check at power on takes approximately 10 seconds During this time all front panel indicators and displays will light except for the CHARGING and BATTERY indicators When the self test is complete the instrument starts measuring LEVEL FREQ Both display windows momentarily blank then a minus sign and period ...

Страница 12: ...harging 2 HOLD RCV connects the receive hold circuit to the RCV port when testing dial up lines 3 HOLD TRMT connects the transmit hold circuit to the TRMT port when testing dial up lines 4 BRDG selects a high input impedance 50 kO for testing lines that are already terminated In BRDG bridged mode it is still necessary to use the RCV key to select the terminating impedance for the line you are test...

Страница 13: ...reference when you press LEVEL ZERO All subsequent results are relative to this reference The displayed results are a measure of loss that is a higher level than the reference is indicated by a sign This is standard in the telephone industry 13 SF SKIP prevents the instrument from transmitting signaling frequencies in the range 2600 Hz 150 Hz If SF SKIP is enabled the instrument automatically prev...

Страница 14: ...easurement modes C MSG 3 kHz FLAT 15 kHz FLAT PRGM SOkBIT 20 MONITOR VOLUME controls the volume of the monitor speaker 21 In the LEVEL FREQ mode the blue keys FI to F4 select preset frequencies At switch on these frequencies are FI 404 Hz F2 1004 Hz F3 2804 Hz F4 2713 Hz New frequencies can be assigned to FI to F4 see Page 2 9 1 4 Getting Started ...

Страница 15: ...ation 1 A single tone measurement with the transmitter set to 10 dBm and the fre quency set to 1804 Hz 6 5 1 Use MEAS to select LEVEL FREQ TRANSMITTER 2 Use the TRMT key to set the transmitter impedance to 600 1 3 Display the transmitted level and frequency u sing the DISPLAY key TRMT indicator lit 4 Use the OUTPUT LEVEL control to adjust the transmitted level to 10 dBm 5 Change the transmitted fr...

Страница 16: ...E W TONE TRANSMITTER 2 Display the transmitted level and frequency using the DISPLAY key TRMT indicator lit Level in dBm is in the left window The frequency fixed at 1004 Hz is in the right window 3 Set the level to 13 dBm using the OUTPUT LEVEL control RECEIVER 4 Display the received noise level using the DISPLAY key RCV indicator lit 5 Select the C MSG filter using the FILTER key 6 Read the weig...

Страница 17: ...ty see Service Manual Err 7 Received holding tone level too high or too low check transmitted level or circuit under test Err 8 Impulse Noise threshold set too high adjust sign in right Loss of holding tone during pulse Noise measurement only window a warning the instrument continues counting Getting Started 1 7 ...

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Страница 19: ...a Transmitter output or Receiver input Pressing the REVERSE key causes the function of the two 310 type jacks to be reversed The current function of the ports is indicated by the indicators below the REVERSE key 2 If the line to be tested is already terminated press BRDG 3 Select the receiver input impedance using the RCV key 135 150 600 900 or 12000 When operating in BRDG bridged mode still ensur...

Страница 20: ...Hold The HP 4934A can be used with a butt in to dial up lines or for talking along a line The HP 4934A can hold lines which require a DC current to maintain the connection once the butt in is disconnected The diagram below shows how the hold dial and reverse functions work 2 2 Making Measurements ...

Страница 21: ...butt in for voice communication 6 To continue to hold the line and connect the HP 4934A transmitter to it select TRMT HOLD then DIAL You can now transmit test signals along the line To re establish the speech path press DIAL To drop the line press TRMT HOLD 7 Alternatively to continue to hold the line and connect the HP 4934A receiver to it select RCV HOLD then REVERSE You can now receive test sig...

Страница 22: ...priate measurement 4 To transmit test signals while continuing to hold the line press TRMT HOLD then REVERSE 5 To drop the line press the appropriate HOLD key With a Butt ln ifyou want to talk 6 Connect the TRMT port to the test line 7 Connect the butt in to the T and R DIAL binding posts and press DIAL to connect the butt in through to the TRMT port The DIAL indicator will light 8 When you receiv...

Страница 23: ...Hz Loss This measurement is used to determine the point to point loss or gain of a channel at 1004 Hz 1004 Hz is transmitted instead of 1000 Hz to avoid mea surement errors caused by signals which are submultiples of the 8 kHz PCM sample rate 1 The transmitter sends 1004 Hz at the nominal data level usually 13 dBmO 2 The receiver measures the level and frequency of the received signal The loss is ...

Страница 24: ...ng the flatness of a channel using only three frequencies two of which are close to the edges of the channel band width The level measured at 1004 Hz is the reference level then the attenu ation is measured at 404 Hz and 2804 Hz relative to the reference level Frequency Frequency shift can occur over facilities such as FDM carrier systems and is measured by comparing the frequency sent into the ch...

Страница 25: ... LEVEL control the level in dBm is in the left window NOTE In some systems it is not desirable to transmit levels above 13 dBmO as interference with other channels may occur Decide whether you want to use a preset frequency or some other frequency Preset Frequency In the LEVEL FREQ mode the blue keys give single keystroke access to four preset frequencies The normal preset frequencies are 404 Hz 1...

Страница 26: ...GND Some Other Frequency 6 Change the value of the transmitted frequency in the right window using the STEP UP and STEP DOWN keys Single Frequency SF Signaling 7 Press SF SKIP to prevent the instrument from transmitting signaling frequencies in the range 2600 Hz 150 Hz Changing the SF Skip Center Frequency 8 Disconnect the transmit side of the line from the test set first to avoid dropping the cir...

Страница 27: ... reading from an absolute value in dBm in the left window to a relative attenuation value in dB All subsequent received level readings will be relative to this value A negative reading indicates a level higher than the reference level Pressing LEVEL ZERO a second time changes the level reading back to absolute units in dBm To change the transmitted frequency return to step 2 N OT E Error Codes wil...

Страница 28: ...ter By performing a 3 kHz measurement after a C Message measurement the effect of low frequency noise 60 Hz commer cial power 20 Hz ringing etc can be determined RESPONSE OF C MESSAQE FILTER RESPONSE OF 3KHz FLAT FILTER 1C IL z 20 i a 40 1 1 J 200 i00 1000 2000 3000 3000 FREQUENCY lH l 200 300 1000 2000 3000 50C 0 FREQUENCY iHzt 15 kHz Flat This filter is used when measuring noise on program chann...

Страница 29: ...ER How it is Measured RAN ou et ERMIKATION TELEPi lONE CIROJiT RECEIVER MONITOR SPEAKER 1 At one end of the line the transmitter provides a quiet termination of the appropriate impedance 2 At the other end the receiver measures the noise via a weighting filter Noise levels are displayed in dBm OdBm 90dBm When the C Message filter is selected the noise is in units of dBmC Making Measurements 2 11 ...

Страница 30: ...Instrument Operation ...

Страница 31: ...nsmitter sends a 1004 Hz holding tone at the nominal data level 2 The receiver notches out the 1004 Hz holding tone and what is left is measured via a weighting filter C Message 3 kHz Flat 15 kHz Flat Program or 50 kBit The measured noise level is displayed in dBm 0 dBm 90 dBm When the C Message filter is used the result is in units of dBmC The notch attenuates all frequencies in the range 995 Hz ...

Страница 32: ...s fixed at 1004 Hz 3 Set the transmitted level to the nominal data level using the OUTPUT LEVEL control RECEIVER 4 Display the received noise level using the DISPLAY key the RCV indicator will be lit 5 Select the required filter using the FILTER key 6 Read the weighted noise in dBm in the left window If the C Message filter is selected the result is in dBmC The received frequency is displayed in t...

Страница 33: ... transmitter receiver I EL S GN NOISE compare 1004 Hz lter OMLY How it is Measured 1 The transmitter sends a 1004 Hz holding tone at the nominal data level 2 The receiver notches out the 1004 Hz holding lone and what is left is measured via a filter C Message 3 kHz Flat 15 kHz Flat Program or 50 kfiit then compared with the original signal plus noise The computed ratio is displayed in dB Making Me...

Страница 34: ...d at 1004 Hz is in the right window 3 Set the transmitted level to the nominal data level using the OUTPUT LEVEL control RECEIVER 4 Display the received signal to noise ratio using the DISPLAY key the RCV indicator will be lit 5 Select the required filter using the FILTER key 6 Read the signal to noise ratio in dB in the right window and the level of the received tone in dBm in the left window 2 1...

Страница 35: ...noise measurement counts the number of noise spikes against 3 threshold levels simultaneously The low level threshold is selectable the medium and high thresholds are fixed at 4 dB and 8 dB above the low thresh old The waveform b below illustrates a received holding tone or test tone that includes interfering impulse noise spikes a TRANSMITTED HOLDING TONE b RECEIVED HOLDING TONE WITH IMPULSE NOIS...

Страница 36: ...mpulse Noise with a holding tone go to step 2 To measure Impulse Noise without a holding tone go to step 5 Impulse Noise with a Holding Tone 2 Select either the C Message or 3 kHz Flat Filter using the FILTER key 3 Display the transmitted level and frequency using the DISPLAY key the TRMT indicator will be lit Level in dBm is in the left window The frequency fixed at 1004 Hz is in the right window...

Страница 37: ...tone exists on the line To maintain measurement accuracy the impulse low threshold should be no more than 25 dB below the holding tone level 11 Use the Impulse Noise DISPLAY key to display the resulting MID and HIGH threshold values These are 4 dB and 8 dB greater than the low threshold value up to a limit of 109 dBm Starting Stopping the Measurement 12 Press START RESET to set the impulse noise c...

Страница 38: ... is set to TIMER again 14 When the measurement is complete the impulse noise count is in the right window the CNTS indicator will be lit A sign in the right window indicates a loss of received holding tone impulse noise with holding tone measurement only NOTE Selecting a new filter during the measurement causes the measurement to stop running 2 20 Making Measurements ...

Страница 39: ...is primarily as a benchmark measurement to show up degradations with time in the transmission quality of a line A deviation of more than 4 P AR units from the benchmark value usually indicates that some characteristic of the channel has changed significantly KEY FREQUENCY KEY FREQUENCY A 140 625 Hz 2140 825 Hs B 380 825 J 2390 625 0 640 626 K 2640 625 D S80 625 L 2890 625 E 114 J S M 3140 625 F 13...

Страница 40: ...dicates no signal degradation Instrument Operation 2 4 3 1 Use MEAS to select P AR there will be a 10 second delay before the HP 4934A starts measuring TRANSMITTER 3 Display the transmitted P AR signal level in dBm in the left window using the DISPLAY key the TRMT indicator will be lit Set the transmitted level to the nominal data level using the OUTPUT LEVEL control RECEIVER 4 Display the receive...

Страница 41: ...asured using the 3 kHz Flat filter Common mode noise can be converted to transverse noise in the circuit by line imbalance fe CRCL r tCEiyER 10 FLTSR DETECTOR i How it is Measured The measurement technique is similar to the message circuit noise measure ment but the input configuration is designed to respond to longitudinal sig nals The ground used as the signal reference is the sleeve of the test...

Страница 42: ...VER 1 Use the MEAS key to select N T GND there will be a 10 second delay before the HP 4934A starts measuring 2 Select the required filter using the FILTER key 3 Display the received noise level using the DISPLAY key the RCV indicator will be lit The noise level in dBm is in the left window If you select the C Message filler the result is in dBmC 2 24 Making Measurements ...

Страница 43: ...easily identified by the presence ofa 9 pin RS 232 serial port on the right side above the AC connector Some functions of older 4934As or units running earlier versions of the software may operate differently some functions oftest sets running later software versions may not be covered by this supplement Be sure to refer to any additional user manual supplements or release notes that came with you...

Страница 44: ...to make the instrument dangerous Intentional interruption is prohibited DO NOT operate the product in an explosive atmosphere or in the presence of flammable gasses or tumes DO NOT use repaired fuses or short circuited fuseholders For continued protection against fire replace the line fuse s only with fuse s of the same voltage and current rating and type DO NOT perform procedures involving cover ...

Страница 45: ...r service and repair to ensure the safety features are maintained Safety Symbols The following symbols on the instrument and in the manual indicate precautions which must be taken to maintain safe operation of the instrument Safety Symbols A The Instruction Documentation Symbol The product is marked with this symbol when it is necessary for the user to refer to the instructions in the supplied doc...

Страница 46: ... could result in damage to or destruction of the instrument Do not proceed beyond a warn ing note until the indicated conditions are fully understood and met C The CE mark shows that the product complies with all relevant European legal Directives accompanied by a year it s when the design was proven ISM 1 A This is a symbol of an Industrial Scientific and Medical Group 1 Class A product Tlie CSA ...

Страница 47: ...ormation and warnings which must be followed by the user to ensure safe operation and to maintain the instrument in a safe condition Electromagnetic Compatibility EMC Information This product has been designed to meet the protection requirements of the European Communities Electromagnetic Compatibility EMC directive 89 336 EEC In order to preserve the EMC performance of the product any cable which...

Страница 48: ...3 6 General Information ...

Страница 49: ...tes the instrument is different from those described in this man ual The manual for this new instrument is accompanied by a Manual Changes supplement This supplement contains change information that explains how to adapt the manual to the new instrument In addition to change information the supplement may contain information for correcting errors in the manual To keep this manual as current and ac...

Страница 50: ...tion Manual an two copies of the Service Manual Option 915 Used for ordering a copy of the Service Manual to enable a service trained person to troubleshoot and repair the instrument Option W30 3 year Extended Support W30 is an extended hardware support agreement It provides 2 year extended hardware support beyond the standard 1 year return to bench warranty Option 1A3 For Bell Operating Companies...

Страница 51: ...oose so that you can fix it to a location of your choice The location should be a flat clean dry surface To fix the label remove the protective backing then carefully position the label on the flat surface Accessories Available The following accessories are available and may have been ordered with the HP 4934A HP 18182A 1 5m 60 inch test cord with a 310 male connector and alligator clips HP 15678A...

Страница 52: ...s meet IEEE standards 743 1984 Transmitter Frequency Range Resolution Accuracy 20 to 99999 Hz 1 Hz 50 ppm lOOtoHOkHzt 10 Hz 120 ppm t Wideband option expands range to 200 kHz Additional Transmitter Functions SF Skip Transmitter skips 2600 150 Hz Four Preset Frequencies Normally 404 1004 2804 and 2713 Hz User can temporarily change these and the SF Skip center fre quency Receiver Frequency Range Re...

Страница 53: ...k 110kt 10to 13 1 2 5 ifl 3 0 5 0 7 2 0 40 to 10 1 5 0 3 0 5 0 6 2 0 t Wideband option expands range to 200 kHz Distortion dB down from fundamental typical Frequency Hz Level dBm 30 100 100 4k 4k 110kt 10to 13 20 45 45 Oto 10 20 50 45 30 too 40 45 40 40 to 30 40 43 33 t Wideband option expands range to 200 kHz At 1004 Hz 0 dBm THD typically 65 dB down from fundamental Generaiinformatlon 3 11 ...

Страница 54: ...150 ohm terminations Receiver accuracy specified when Transmitter frequency is 110 kHz t Frequency range 110k 200k applicable when Wideband option 021 is installed Message Circuit Noise Receiver Transmitter off and terminated Range 0 to 100 dbm 135 150 ohm 10 to 100 dBm Resolution 1 dB Detector Type Quasi RMS Accuracy For 135 and 150 ohms 3 dB from 10 to 15 dBm 1 dB from 15 to 100 dBm For 600 900 ...

Страница 55: ... 10 dBm Ratio Range 10 to 45 dB Ratio Resolution 1 dB Accuracy signal 30 to 10 dBm S N 10 to 40 dB 1 dB S N 40 to 45 dB 2 dB Detector Types noise Quasi RMS tone Average 3 Level Impulse Noise Receiver Transmitter C Message or 3 kHz Flat receive filter selected 1004 Hz tone Any other receive filter off and terminated Level Range 40 to 10 dBm Notch Filter 50 dB rejection of levels 5 dBm 40 dB rejecti...

Страница 56: ...o 130 dBm Resolution 1 dB Accuracy 1 5 dB 60 130 dBrn 2 5 dB 50 60 dBm Filters and Detector See message circuit noise P AR Transmitter Signal 16 frequencies in range 140 to 3890 Hz Level range 40 to 0 dBm Resolution 1 dB Receiver P AR Range 0 to 120 units Resolution 1 unit Accuracy 30 to 110 units 2 units Level Range 40 to 3 dBm RMS 135 and 160 ohm 30 to 3 dBm RMS Resolution 1 dB General Maximum D...

Страница 57: ...RMS 48 to 66 Hz and 198 to 264 Vac RMS 48 to 66 Hz 20 VA maximum Battery Supply option 001 Nominally 6 hours 4 hours minimum operation at 25 C Complete recharge typically in 14 hours with unit in standby mode RS 232 port DB 9S connector DTE baud rates 300 1200 2400 9600 19200 38400 8 bits no parity 1 stop bit hardware flow control Temperature range without batteries Operating 0 to 50 C Storage 40 ...

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Страница 59: ... cush ioning material is damaged it should be kept until the contents of the ship ment have been checked for completeness and the instrument has been checked mechanically and electrically Procedures for checking electrical performance are given in Chapter 5 of this manual If the contents are incomplete if there is mechanical damage or defect or if the HP 4934A does not pass the Performance Tests n...

Страница 60: ...mmon terminal is connected to the neutral pole of the power source C The power cable plug shall only be inserted into a socket outlet provided with a protective earth contact The protective action must not be negated by the use of an extension cord without a protective conductor grounding Power Requirements The instrument requires a power source of 90 to 126 V AC 48 to 66 Hz single phase If necess...

Страница 61: ...he battery terminals it may cause serious personal injury The battery should only be changed by service trained personnel Do not incinerate or otherwise mutOate the battery It might burst or release toxic materials causing personal injury For operator protection during battery operation connect the cha is terminal on the side panel to earth ground The instrument will run with a fully charged batte...

Страница 62: ...ated in environments with humidity up to 95 at 40 degrees centigrade However the instrument should also be protected from temperature extremes which may cause condensation within the instmment Altitude The instmment may be operated at altitudes up to 4 600m 15 000 ft Air Flow To provide adequate cooling an air gap of approximately 3 inches should be maintained around the instrument Cleaning To cle...

Страница 63: ...Humidity 90 Altitude 15 300m 50 000 ft The instrument should also be protected from temperature extremes which may cause condensation within the instrument Packaging Tagging for Service If the instrument is being returned to Hewlett Packard for service please complete one of the blue repair tags located at the front of the service manual if you have one or give details on a label then attach the t...

Страница 64: ...rvice center attach a tag indicat ing type of service required return address model number and full serial number b Use strong shipping container A double walled carton of 35 poimd test material is adequate c Use a layer of shock absorbing material 70 to 100 mm 3 to 4 inch thick around all sides of the instrument to provide firm cushioning and prevent movement inside the container Pro tect the con...

Страница 65: ...s full warranted specification Full Performance Test Ensures that the instrument is operating to its full warranted specification Results of the Performance Test may be recorded on the Test Record at the end of Chapter 5 or on the Abbreviated Test Record at the end of the Opera tional Verification procedures Calibration Cycle Results recorded on the Test Record at incoming inspection can be used f...

Страница 66: ...2 digit resolution HP 3456A DC Power Supply Dual output range 0 to 48 V HP 6234A Frequency Counter Range 20 Hz to 10 MHz 001 Hz resolution at20 Hz HP5315A Decade Transformer Attenuation 0 to 85 dB Model DT72A DEKATRAN 600fl Resistor 0 01 0 25W HP 0811 3502 lOOO Resistor 1 0 25W HP 0757 0178 20 dB Amplifier and 4 kHz low pass filter Details of the specification and construction are in Appendix A wh...

Страница 67: ... 19 at the foUoNving frequencies 20Hz 1000Hz 50kHz andllO kHz Transmitter Level Carry out the Performance Test on Page 5 20 Receiver Frequency CaiTy out the procedure on Page 5 4 Receiver Level Carry out the procedure on Page 5 5 Weighting Filters Carry out the procedure on Page 5 6 Message Circuit Noise Carry out the Performance Test on Page 5 34 Impulse Noise Carry out steps 1 to 17 in the Perfo...

Страница 68: ...ency 0 dBm 20 Hz 3 Set the Display Mode to RCV Check the displayed frequency is between 19 and 21 Hz 4 Set the transmitter frequency Display Mode TRMT to each ofthe values in the following table and check that the displayed receiver frequency Display Mode RCV is within limits Transmitter Frequency Receiver Frequency 1 000 Hz 998 to 1002 Hz 50 000 Hz 49 99 to 50 01 kHz 110 000 Hz 109 99 to 110 01 k...

Страница 69: ... RCV Impedance Display Mode Transmitter Level Frequency LEVEL FREQ 600a 6000 TRMT 0 dBm 1004 Hz 3 Set the Display Mode to RCV Check the displayed level is between 0 2 and 0 2 dBm 4 Set the transmitter level to 19 dBm Display Mode TRMT 5 Check that the received level Display Mode RCV reading is between 19 2 and 18 8 dBm Performance Tests 5 5 ...

Страница 70: ...t the HP 4934A as follows Measurement Transmitter TRMT Impedance Receiver RCV Impedance Display Mode Filter NOISE 6000 600i2 RCV C MSG 3 Set the AC Calibrator output level to 0 7746 V then switch on the OUTPUT Do not adjust the AC Calibrator output level during the remainder of this test 4 Set the AC Calibrator to each of the frequencies listed in the following table and check the HP 4934A noise r...

Страница 71: ... the frequencies in the following table and check the HP 4934A noise readings AC Calibrator Frequency HP 4934A Noise Reading 400 Hz 88 to 92 dBm 1 000 Hz 89 to 91 dBm 15 000 FIz 84 to 90 dBm 30 000 Hz 74 to 82 dBm Program Filter 9 Select the PRGM filter 10 Set the AC Calibrator to each ofthe frequencies in the following table and check the HP 4934A noise readings AC Calibrator Frequency HP 4934A N...

Страница 72: ...r 11 Select the 50 kBit filter 12 Set the AC Calibrator to each of the frequencies in the following table and check the HP 4934A noise readings AC Calibrator Frequency HP 4934A Noise Reading 5 8 Performance Tests ...

Страница 73: ...600Q Display Mode RCV Filter 15 kHz FLAT Period NON STOP Impulse Noise Display LOW SET 3 Set the AC Calibrator output level to 0 7746 V at 2 000 Hz then switch on the OUTPUT 4 Set the LOW SET threshold to 75 dBm 5 Press START RESET to start the measurement 6 Wait 60 seconds then press STOP 7 Check the reading on the HP 4934A display is 480 48 counts 8 Select the MID threshold Check the reading on ...

Страница 74: ...3 Set the Display Mode to RCV and remove the cable from the RCV port 4 Err 7 should be displayed in the right window 5 10 Performance Tests ...

Страница 75: ...DC Voltmeter HP 3456A DC Power Supply HP 6234A lOOQ 1 Resistor HP 0757 0178 WECO 310 Connector HP 1252 0695 PROCEDURE 1 Connect the equipment as shown in the following figure 2 Set the HP 4934A as follows Measurement Transmitter TRMT Impedance Receiver RCV Impedance Transmit Hold Select Receive Hold Select LEVEL FREQ 600n 6000 TRMT HOLD RCV HOLD Performance Tests 5 11 ...

Страница 76: ...ts C and D shown in the previous figure and note the reading 6 Calculate the hold current as follows Hold Current Voltage noted in step 5 100 The specification of the hold current is nominally 26 mA 7 Switch off the DC Power Supply 8 Reverse the polarity of the connections to the DC Power Supply 9 Switch on the DC Power Supply 10 Repeat steps 5 to 7 Receiver Hold Circuit 11 Press REVERSE 12 Repeat...

Страница 77: ...s Function Sine Frequency 1004 Hz Adjust the Function Generator output level until the HP 4934A RCV display reads 0 dBm approx 10 8 dBm on the HP 3325A Do not adjust the Function Generator output level for the remainder of this test 4 Select RCV HOLD on the HP 4934A 5 Set the Function Generator DC Offset level to 3 9V 6 Check the reading on the HP 4934A RCV display is 0 0 3 dBm 7 Set the Function ...

Страница 78: ... Hz 1000 05 Hz 50 000 Hz 49 997 5 Hz 50 002 5 Hz 110 000 Hz 109 986 8 Hz 110 013 2 Hz Transmitter Level Accuracy 5 21 Step 4 OdBm 0 7657 V 0 7836 V Step 5 5 dBm 0 4306 V 0 4406 V 10 dBm 0 2421 V 0 2478 V 19 dBm 0 0859 V 0 0879 V Receiver Frequency 5 4 Step 3 20 Hz 19 Hz 21 Hz Step 4 1000 Hz 998 Hz 1002 Hz 50 000 Hz 49 99 kHz 50 01 kHz 110 000 Hz 109 99 kHz 110 01 kHz Receiver Level 5 5 Step 3 OdBm...

Страница 79: ...1 dBm 5000 Hz 57 dBm 65 dBm 3 kHz Flat Filter 400 Hz 88 dBm 92 dBm 1000 Hz 89 dBm 91 dBm 3000 Hz 84 dBm 90 dBm 6000 Hz 74 dBm 82 dBm 15 kHz Flat Filter 400 Hz 88 dBm 92 dBm 1000 Hz 89 dBm 91 dBm 15 000 Hz 84 dBm 90 dBm 30 000 Hz 74 dBm 82 dBm Program Filter 100 Hz 61 dBm 67 dBm 500 Hz 81 dBm 85 dBm 1000 Hz 88 dBm 92 dBm 2000 Hz 92 dBm 98 dBm 7000 Hz 92 dBm 100 dBm 10000 Hz 76 dBm 86 dBm Performanc...

Страница 80: ...9 dBm Impulse Noise 5 9 Step 7 Low Count 432 528 Step 8 Mid Count 432 528 Step 9 High Count 432 528 Noise to GroundAccuracy 5 42 Step 4 65 17 V 127 dBm 130 dBm Step 5 8 2049 V 109 dBm 112 dBm 0 8205 V 89 dBm 92 dBm 82 049 mV 69 dBm 72 dBm 9 2061 mV 50 dBm 53 dBm Peak to Average Ratio 5 43 Step 3 23 dBm 98 102 Step 4 20 dBm 98 102 40 dBm 98 102 Loss ofHolding Tone 5 10 Step 4 Err 7 displayed 5 16 P...

Страница 81: ...Table 1 Operation Verification Test Record Page No Test Description Result 5 12 Hold Current Step 6 Current nominally 26 mA Min Actual Max Performance Tests 5 17 ...

Страница 82: ...listed in Chapter 3 If any of the following tests fail carry out the adjustments described in Chapter 5 of the Service Manual If this fails to correct the problem refer to the troubleshooting section in Chapter 8 of the Service Manual or return the instrument to the nearest HP Service Office 5 18 Performance Tests ...

Страница 83: ...ce 6000 Display Mode TRMT Transmitter Output Level Frequency 0 dBm 20 Hz 2 Connect the HP 4934A TRMT port to the Frequency Counter input 3 Check the reading on the Frequency Counter is between 19 999 and 20 001 Hz 4 Set the HP 4934A transmitter frequency to each of the values in the following table and check the Frequency Counter reading Transmitter Frequency Frequency Counter Reading 1000 Hz 999 ...

Страница 84: ... port to the AC Voltmeter input 3 Set the HP 4934A as follows Measurement LEVEL FREQ Transmitter TRMT Impedance 6000 Display Mode TRMT Transmitter Frequency 1004 Hz 4 Set the HP 4934A transmitter output level to amaximum by turning the OUTPUT LEVEL control fully clockwise The reading on the AC Voltmeter should be greater than 3 42 V 5 Set the HP 4934A transmitter output level to a minimum by turni...

Страница 85: ... input 2 Connect the HP 4934A TRMT port to the AC Voltmeter input 3 Set the HP 4934A as follows Measurement Transmitter TRMT Impedance Display Mode Transmitter Level Frequency LEVEL FREQ 6000 TRMT 0 dBmyi004 Hz 4 Check the reading on the AC Voltmeter is between 0 7657 and 0 7836 V 5 Set the HP 4934A transmitter output level to each of the values in the following table and check the AC Voltmeter re...

Страница 86: ...sistor HP 0811 3502 PROCEDURE 1 Connect the 6000 resistor across the AC Voltmeter input 2 Coimect the HP 4934A TRMT port to the AC Voltmeter input 3 Set the HP 4934A as follows Measurement Transmitter TRMT Impedance Display Mode Transmitter Frequency LEVEL FREQ 6000 TRMT 1004 Hz 4 Adjust the HP 4934A transmitter output level until a reading of 2 4495 V is obtained on the AC Voltmeter 5 Set the HP ...

Страница 87: ...smitter Frequency AC Voltmeter Reading 20 Hz 2 1831 to 2 7484 V 200 Hz 2 3937 to 2 5065 V 5 kHz 2 3937 to 2 5065 V 15 kHz 2 3937 to 2 5065 V 30 kHz 2 3125 to 2 5946 V 85 kHz 2 3125 to 2 5946 V Performance Tests 5 23 ...

Страница 88: ...C Voltmeter The amplifier provides a 600Q termina tion and is powered from a separate DC Power Supply If a high input impedance amplifier is used a 600Q termination is required Variations in the gain of the 20 dB Amplifier are compensated for at each of the test frequencies in the following procedure EQUIPMENT AC Voltmeter AC Calibrator 20 dB Amplifier Dual Output DC Power Supply PROCEDURE CAUTION...

Страница 89: ...he AC Voltmeter 6 Set the HP 4934A as follows Measurement LEVEL FREQ Transmitter TRMT Impedance 600Q Display Mode TRMT Transmitter Frequency 1000 Hz 7 Disconnect the AC Calibrator from the input of SAl 8 Connect the HP 4934A TRMT port to the input of SAl 9 Adjust the HP 4934A transmitter output level until the reading on the AC Voltmeter is the same as that noted in step 5 Do not change the HP 493...

Страница 90: ... the AC Voltmeter at each frequency 13 Use the AC Voltmeter readings and the table on Pages 5 27 to 5 29 to check the flatness This is best explained by the following example If the frequency is 20 Hz and the AC Voltmeter reading in step 12 were 71 0 mV Look up 71 mV in the Vq column then check the 20 Hz column for the allowable voltage range when the HP 4934A is connected to the AC Voltmeter If t...

Страница 91: ... 2 to 67 0 72 7 to 64 8 69 0 77 4 to 61 5 70 6 to 67 4 73 1 to 65 1 69 4 77 9 to 61 9 71 0 to 67 8 73 5 to 65 5 69 8 78 3 to 62 2 71 4 to 68 2 73 9 to 65 9 70 2 78 8 to 62 6 71 8 to 68 6 74 4 to 66 3 70 6 79 2 to 62 9 72 2 to 69 0 74 8 to 66 7 71 0 79 7 to 63 3 72 7 to 69 4 75 2 to 67 0 71 4 80 1 to 63 6 73 1 to 69 8 75 6 to 67 4 71 8 80 6 to 64 0 73 5 to 70 2 76 1 to 67 8 72 2 81 0 to 64 3 73 9 t...

Страница 92: ... 4 to 76 8 83 3 to 74 2 79 0 88 6 to 70 4 80 8 to 77 2 83 7 to 74 6 79 4 89 1 to 70 8 81 2 to 77 6 84 1 to 75 0 79 8 89 5 10 71 1 81 7 to 78 0 84 5 to 75 3 80 2 90 0 to 71 5 82 1 to 78 4 85 0 to 75 7 80 6 90 4 to 71 8 82 5 to 78 8 85 4 to 76 1 81 0 90 9 to 72 2 82 9 to 79 2 85 8 to 76 5 81 4 91 3 to 72 5 83 3 to 79 5 86 2 to 76 8 81 8 91 8 to 72 9 83 7 to 79 9 86 6 to 77 2 82 2 92 2 to 73 3 84 1 t...

Страница 93: ...0 92 2 to 82 1 87 4 98 1 to 77 9 89 4 to 85 4 92 6 to 82 5 87 8 98 5 to 78 3 89 8 to 85 8 93 0 to 82 9 88 2 99 0 to 78 6 90 3 to 86 2 93 4 to 83 3 88 6 99 4 to 79 0 90 7 to 86 6 93 8 to 83 6 89 0 99 9 to 79 3 91 1 to 87 0 94 3 to 84 0 89 4 100 3 to 79 7 91 5 to 87 4 94 7 to 84 4 89 8 100 8 to 80 0 91 9 to 87 8 95 1 to 84 8 90 2 101 2 to 80 4 92 3 to 88 1 95 5 to 85 2 90 6 101 7 to 80 7 92 7 to 88 ...

Страница 94: ...QUIPMENT AC Calibrator DATRON 4707A Frequency Counter HP 5315A PROCEDURE CAUTION Ensure that the AC Calibrator OUTPUT is switched olf or set to the minimum level before proceeding with the following procedure 1 Connect the equipment as shown in the following figure a a ibrator hf 4534a 2 Set the AC Calibrator output level to 0 7746 V then switch on the OUTPUT Set the AC Calibrator frequency to 20 ...

Страница 95: ...the AC Calibrator frequency to each ofthe values given in the following table as observed on the Frequency Counter and check the HP 4934A receiver frequency reading AC Calibrator Frequency HP 4934A Receiver Reading 1 000 Hz 999 to 1001 Hz 10 000 Hz 9 995 to 10 005 Hz 50 000 Hz 49 99 to 50 01 kHz 100 000 Hz 99 99 to 100 01 kHz 110 000 Hz 109 99 to 110 01 kHz Performance Tests 5 31 ...

Страница 96: ...7A PROCEDURE CAUTION Ensure that the AC Calibrator OUTPUT is switched off or set to the minimum level before proceeding with the following procedure 1 Connect the AC Calibrator output to the HP 4934A RCV port 2 Set the HP 4934A as follows Measurement LEVEL FREQ Receiver RCV Impedance 600Q Display Mode RCV 3 Set the AC Calibrator output level to 2 4495 V at 1000 Hz then switch on the OUTPUT 4 Check...

Страница 97: ...P 4934A Receiver Level 50 Hz 10 5 to 11 5 dBm 200 Hz 10 8 to 11 2 dBm 15 000 Hz 10 8 to 11 2 dBm 85 000 Hz 10 5 to 11 5 dBm 10 Set the AC Calibrator output level to 7 746 mV at 20 Hz 11 Check the HP 4934A receiver level reading is between 41 and 39 dBm 12 Set the AC Calibrator to each of the frequencies in the following table and check the HP 4934A receiver level readings AC Calibrator Frequency H...

Страница 98: ...it Noise accuracy is checked using an AC Calibrator and Decade Transformer The Decade Transformer attenuates a test signal from the AC Calibrator EQUIPMENT AC Calibrator DATRON 4707A Decade Transformer Model DT72A DEKATRAN PROCEDURE CAUTION Ensure that the AC Calibrator OUTPUT is switched off or set to the minimum level _ before proceeding with the following procedure 1 Connect the equipment as sh...

Страница 99: ... AC Calibrator output level to 0 7746 V 7 Check the reading on the HP 4934A is between 89 and 91 dBm 8 Set the Decade Transformer to each of the settings listed in the following table and check the HP 4934A noise reading Decade Transformer Settings dB HP 4934A Noise Reading 0 3162278 10 79 to 81 dBm 0 1000000 20 69 to 71 dBm 0 0316228 30 59 to 61 dBm 0 0X00000 40 49 to 51 dBm 0 0031623 50 39 to 41...

Страница 100: ...Connect the AC Calibrator output to the HP 4934A RCV port 2 Set the HP 4934A as follows Measurement NOISE W TONE Filter C MSG Receiver RCV Impedance 600Q Display Mode RCV 3 Set the AC Calibrator output level to 0 7746 V at 995 Hz then switch on the OUTPUT 4 Check the reading on the HP 4934A is less than 40 dBm 5 Set the AC Calibrator to each of the frequencies in the following table and check the ...

Страница 101: ... Signal to Noise Ratio Accuracy 10 to 40 dB l dB 40 to 45 dB 2 dB DESCRIPTION A Synthesizer and Power Adder SA2 are used to check the Signal to Noise Ratio accuracy Signal to Noise Ratio is the amplitude ratio of the holding tone to the background noise An 1800 Hz tone is used to simulate the noise and is added to the HP 4934A 1004 Hz holding tone using the Power Adder EQUIPMENT Synthesizer HP 333...

Страница 102: ...Q TRMT 10 dBm 3 Set the Synthesizer output level to 0 dBm at 1800 Hz 4 Set the HP 4934A Display Mode to RCV then check the signal to noise ratio reading on the display is 10 dB 1 dB 5 Set the Synthesizer output level to each of the values in the following table and check the noise reading on the HP 4934A Synthesizer Level HP 4934A Noise Reading 10 dBm 20 dB l dB 20 dBm 30 dB l dB 30 dBm 40 dB l dB...

Страница 103: ... EQUIPMENT AC Calibrator DATRON4707A CAUTION Ensure that the AC Calibrator OUTPUT is switched olf or set to the minimum level before proceeding with the following procedure PROCEDURE 1 Connect the AC Calibrator output to the HP 4934A RCV input 2 Set the AC Calibrator output level to 1 732 mV at 1000 Hz then switch on the OUTPUT Low Threshold Check 3 Set the HP 4934A as follows Measurement IMPULSE ...

Страница 104: ... less than 5 477 mV 12 Press STOP to stop the Mid threshold check High Threshold Check 13 Set the AC Calibrator output level to 5 477 mV 14 Select the HIGH threshold using the HP 4934A Impulse Noise DISPLAY key 15 Press the START RESET key the displayed count should remain at zero 16 Slowly increase the AC Calibrator output level until the HP 4934A starts counting the AC Calibrator level should be...

Страница 105: ...alibrator is used to check the Noise to Ground accuracy EQUIPMENT AC Calibrator DATRON 4707A WECO 310 Connector HP 1251 0695 PROCEDURE WARNING Hazardous voltages are present during this procedure only service trained personnel aware of the hazards involved should perform the test CAUTION Ensure that the AC Calibrator OUTPUT is switched off or set to the minimum level before proceeding with the fol...

Страница 106: ...5 42 Performance Tests ...

Страница 107: ... port using a short cable 2 Set the HP 4934A as follows Measurement P AR Transmitter TRMT Impedance 6000 Receiver RCV Impedance 6000 Display Mode TRMT Transmitter Level 23 dBm 3 Set the Display Mode to RCV Check the reading on the HP 4934A display is between 98 and 102 P AR Units 4 Set the transmitter level to each of the values in the following table and check the P AR readings in the RCV display...

Страница 108: ...20 Hz 19 999 Hz 20 001 Hz Step 4 1000 Hz 999 95 Hz 1000 05 Hz 10 000 Hz 9 999 5 Hz 10 000 5 Hz 50 000 Hz 49 997 5 Hz 50 002 5 Hz 100 000 Hz 99 994 Hz 100 004 Hz 110 000 Hz 109 986 8 Hz 110 013 2 Hz Transmitter Level Range 5 20 Step 4 Fully clockwise 3 42 V Step 5 Fully anti clockwise 0 00775V Transmitter Level Accuracy 5 21 Step 4 0 dBm 0 7657 V 0 7836 V Steps 5dBm 0 4306 V 0 4406 V 10 dBm 0 2421 ...

Страница 109: ...946 V Transmitter Flatness at 40 dBm 20 Hz to 200 Hz 1 0 dB 200 Hz to 15 kHz 0 2 dB 15 kHz to 85 kHz 0 5 dB Receiver Frequency Range and Accuracy Step 4 20 Hz 19 Hz 21 Hz Step 5 1000 Hz 999 Hz 1001 Hz 10 000 Hz 9 995 Hz 10 005 Hz 50 000 Hz 49 99 kHz 50 01 kHz 100 000 Hz 99 99 kHz 100 01 kHz 110 000 Hz 109 99 kHz 110 01 kHz Receiver Level Accuracy Step 4 1000 Hz 9 9 dBm 10 1 dBm Step 6 20 1 dBm 19 ...

Страница 110: ...000 Hz 10 5 dBm 11 5 dBm Step 11 20 Hz 41 dBm 39 dBm Step 12 50 Hz 40 5 dBm 39 5 dBm 200 Hz 40 2 dBm 39 8 dBm 15 000 Hz 40 2 dBm 39 8 dBm 85 000 Hz 40 5 dBm 39 5 dBm Message Circuit Noise Accuracy 5 35 Step 5 98 dBm 100 dBm Step 7 89 dBm 91 dBm Step 8 79 dBm 81 dBm 69 dBm 71 dBm 59 dBm 61 dBm 49 dBm 51 dBm 39 dBm 41 dBm 29 dBm 31 dBm 19 dBm 21 dBm 9 dBm 11 dBm 2 dBm 8 dBm 5 46 Performance Tests ...

Страница 111: ...curacy Step 4 9dB 11 dB Step 5 19 dB 21 dB 29 dB 31 dB 39 dB 41 dB 43 dB 47 dB Impulse Noise Threshold Accuracy Step 6 Count starts at 3 456mV Step 11 Count starts at 5 477mV Step 16 Count starts at 6 895mV Step 18 60 dBm Low 15 455 mV 19 457mV Mid 24 495 mV 30 837mV High 38 822 mV 48 874mV 80 dBm Low 0 1546 V 0 1946V Mid 0 2449 V 0 3084V High 0 3882 V 0 4887V Performance Tests 5 47 ...

Страница 112: ... Low 1 5455 V 1 9457V Mid 2 4495 V 3 0837V High 3 8822 V 4 8874V Noise to Ground Accuracy 5 42 Step 4 65 17 V 127 dBm 130 dBm Step 5 8 2049 V 109 dBm 112 dBm 0 8205 V 89 dBm 92 dBm 82 049 mV 69 dBm 72 dBm 9 2061 mV 50 dBm 53 dBm P AR Accuracy 5 43 Step 3 23 dBm 98 102 Step 4 20 dBm 98 102 40 dBm 98 102 5 48 Performance Tests ...

Страница 113: ...The basic procedure for downloading software is as follows Check the distribution diskette for readme files Connect a PC to the 4934A using a serial cable Put the 4934A into Download mode and set the baud rate Execute the download command on the PC The following section describes the procedure in detail Software Downloading 6 1 ...

Страница 114: ... 4934A and promptly press the START RESET key during the star tup routine while the serial number is being displayed When the unit is in Download mode the left display shows dl and the right dis play shows the installed software revision 3 Use the RCV key to set the 4934A s baud rate for the download procedure Each time you press RCV the right display shows the currently selected baud rate The bau...

Страница 115: ...wnloaded Operating software files end with the extension OUT If no file is specified the program downloads the first file in the working directory that has the OUT extension Distribution diskettes include only one software file so it is rare that you would need to use the file name in the download command Pn Specifies the COM port to be used on the PC where n is 1 through 4 For example P3 selects ...

Страница 116: ......

Страница 117: ...example a PC running a terminal emulation program the unit can be operated just as if the front panel controls were being used The TIMS is operated using a set of control commands to set parameters execute tests and so forth A set of query commands is used to retrieve measurements for display on the controller device Remote Control 7 1 ...

Страница 118: ...4934A TIMS Serial Port Pinout Pin Number Functions 1 No connection 2 TXD Transmit data output The serial port uses the following communication 3 RXD Receive data input parameters 4 DSR Data set ready input 8 data bits 5 GND Ground 1 stop bit 6 DIR Data terminal ready output Hardware flow control 7 CIS Clear to send input 8 RTS Request to send output 9 No connection Baud Rates The serial port suppo...

Страница 119: ...traight Through Cable PC End Pins 4d34A End Pins 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 Null Modem The following table shows the pinouts for a null modem cable This is the cable to be used when a Vectra is being used as the controller Null Modem Cable Cable Pins Cable Pins Remote Control 7 3 ...

Страница 120: ...he display shows bd in the left display and the current baud rate in the right display The baud rates available are 300 1200 2400 9600 and 19200 NOTE The 4934A always resets to 9600 baud at power up _ The 4934A uses 8 data bits no parity 1 stop bit and hardware flow control Activating Remote Mode The 4934A enters remote control mode when it detects the RMT command at the serial input While the uni...

Страница 121: ... RMT Puts unit into remote mode disable front panel LCL Returns unit to front panel local control TRMT Same as pressing the TRMT key RCV Same as pressing the RCV key NORM Sets input jacks to TRMT RCV configuration as with REVERSE key REV Sets input jacks to RCV TRMT configuration as with REVERSE key 1135 Sets Tx Impedance to 135 ohms as with the TRMT key T150 Sets Tx Impedance to 150 ohms T600 Set...

Страница 122: ...OISE W TONE selection STN Sets MEAS to SIG TO NOISE selection IMN Sets MEAS to IMPULSE NOISE selection PAR Sets MEAS to P AR selection NTG Sets MEAS to N T GND selection CMES Sets FILTER to C MSG selection as with the FILTER key 3K Sets FILTER to 3 kHz FLAT selection 15K Sets FILTER to 15 kHz FLAT selection PROG Sets FILTER to PRGM selection 50KB Sets FILTER to 50 kBIT selection 5M Sets Impulse No...

Страница 123: ...level to nn n dBm range 36 to 13 dBm FREQnnnnnn Acts as frequency selection buttons sets frequency to nnnnnn Hz THRESH nn Acts as Impulse Noise LOW Threshold SET selection ZERON Sets LEVEL ZERO on ZEROFF Sets LEVEL ZERO off SKIPON Sets SF SKIP on SKIPOFF Sets SF SKIP off STORE Same as pressing the STORE key Requires subsequent FI F2 F3 or F4 command to complete action Does not work with SF SKIP F1...

Страница 124: ... the current MEAS measurement mode For LEVEL FREQ NOISE NOISE W TONE SIG TO NOISE IMPULSE NOISE TRMT P AR and N T GND measurement modes the DISP command returns valuel value2 where valuel is the value displayed on the left display and value2 is the measurement displayed on the right display All levels and signaLto noise ratio values include the tenths digit For IMPULSE NOISE RCV measurements the D...

Страница 125: ...nge value entered The ERR returns one of the following responses ERR Responses Response Description No Errors No range errors were detected since the last ERR command Level over range The last LEV value was too high Level under range The last LEV value was too low Frequency over range The last FREQ value was too high Frequency under range The last FREQ value was too low Threshold over range The la...

Страница 126: ......

Страница 127: ...jection at 10 kHz is greater than 10 dB EQUIPMENT AC Calibrator AC Voltmeter Dual Output DC Power Supply PROCEDURE CAUTION Ensure that the AC Calibrator OUTPUT is switched off or set to the minimum level before proceeding with the following procedure 1 Connect the equipment as shown in the following figure AC CAIJBFMTOR SA1 AC VOLTMETER DATRON 4707A HP 3456A HP 6234A Service Accessory 1 SA1 A 1 20...

Страница 128: ...C Voltmeter Reading 50 Hz 0 6517 V to 0 9206 V 200 Hz 0 6517 V to 0 9206 V 1000 Hz 0 6517 V to 0 9206 V 15 kHz 0 6517 V to 0 9206 V 60 kHz 0 6517 V to 0 9206 V 85 kHz 0 6517 V to 0 9206 V 20 dB Gain and Flatness Check 6 Set SAl as follows Gain 20 dB Filter Flat 7 Set the AC Calibrator output level to 7 746 mV at 20 Hz 8 Check that the AC Voltmeter reading is between 65 17 mV and 92 06 mV 9 Set the...

Страница 129: ...10 Set SAl as follows Gain Unity Filter 4kHzL P 11 Set the AC Calibrator frequency to 100 Hz 12 Adjust the AC Calibrator output level until the reading on the AC Voltmeter is 0 7746 V NOTE Do not adjust the AC Calibrator output level for the remainder of the test 13 Set the AC Calibrator frequency to 10 kHz 14 Check that the reading on the AC Voltmeter is less than 0 2450 V Service Accessory 1 SAl...

Страница 130: ...0 3468 C2 Capacitor 0 12 J F 5 0160 3468 C3 Capacitor 10k pF 1 0160 3548 C4 Capacitor Ik pF 1 0160 2387 D1 Diode 2 1901 0040 D2 Diode 1901 0040 R1 Resistor 600Q 0 1 2 0698 7408 R2 Resistor lOkCl 1 4 0757 0442 R3 Resistor 10 kQ 1 0757 0442 R4 Resistor 100kQ l 2 0757 0465 R5 Resistor lOkli 2 0757 0442 A 4 Service Accessory 1 SA1 20 dB Amplifier 4 kHz Fiiter ...

Страница 131: ...2 2 kQ 1 0698 3450 RIO Resistor 2 87 kO l 1 0698 3151 Rll Resistor 6000 0 1 0698 7408 U1 MC3400L 1826 0712 SI Switch 2 3101 0973 S2 Switch 3101 0973 J1 Connector 1 1251 3677 J2 Binding Post 3 1510 0076 J3 Binding Post 1510 0076 J4 Binding Post 1510 0076 J5 BNC Connector 1 1250 1780 Service Accessory 1 SA1 A 5 20 dB Ampilfier 4 kHz Filter ...

Страница 132: ...A 6 Service Accessory 1 SA1 20 dB Amplifier 4 kHz Filter ...

Страница 133: ...B 0 05 dB at 40 Hz to 40 kHz EQUIPMENT AC Voltmeter HP3456A Synthesizer HP 3336B Resistor600a 0 01 HP0811 3502 N OT E Do not uses an AC Calibrator in place of a Synthesizer with a 600Q balanced output or errors will occur PROCEDURE 1 Connect the equipment as shown in the following figure SYNTHESIZER Service Accessory 2 SA2 B 1 Power Spiitter Adder ...

Страница 134: ...etween 0 7702 V and 0 7791 V 6 Connect the AC Voltmeter across J2 and the resistor across J3 then repeat step 5 7 Repeat steps 2 to 6 with the Synthesizer frequency at 40 kHz F 0we r s i r Er adder Replaceable Parts Ref Designator Description Qty HP Part No R1 to R6 Resistor Fxd IOOQO 1 1 8 W 6 0698 6323 JltoJ3 Connector 3 pin 3 1251 2533 MSC Connector single pin 9 1251 0600 MSC Blank Printed Circ...

Страница 135: ... 1 2 HOLD TRMT 1 2 LEVEL ZERO 1 3 MEAS 1 3 ON STBY 2 2 PERIOD 1 3 RCV 1 2 REVERSE 1 3 SFSKIP 1 3 START RESET 1 4 STEP DOWN 1 3 STEP UP 1 3 STOP 1 3 TRMT 1 3 L Level and Frequency Instrument Operation 2 7 2 9 Principles 2 5 2 6 Line Fuse 4 2 Loss 1004 Hz 2 5 Loss of Holding Tone Operational Verifi cation 5 10 M Mating Connectors 4 4 Measurements Impulse Noise 2 17 2 20 Level and Frequency 2 5 2 9 M...

Страница 136: ...in 2 4 Without a Butt In 2 4 Reversing the two 310 Port Connections 2 1 S Safety symbols 3 3 Signal to Noise Accuracy Performance Test 5 37 Instrument Operation 2 16 Principles 2 15 Single Frequency SF Signaling 2 8 Single Point Frequencies 2 8 T Transmitter Flatness at flO dBm Performance Test 5 22 Frequency Accuracy Performance Test 5 19 Level Accuracy Performance Test 5 21 Level Range Performan...

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