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OPERATION

 

3.12.6 MESSAGE 

FORMAT

 

 
The message format can be divided into several subdivisions: 
 
 a. 

ASCII/BCD 

 b. 

Baud 

Rate* 

 c. 

Stop 

Bit* 

 d. 

Parity* 

 

e. 

Word Length (ASCII only) 

 f. 

Preamble 

 

g. 

Postamble (Not selectable in ASCII) 

 h. 

Quality 

Indicator 

 i. 

Data 

Format 

 

j. 

Loss & Error Data Bits 

 

Note: 

The asterisk (*) after the baud rate, stop bits and parity indicate that  
when these values are changed, the UART needs to be reloaded.  There are three ways to 
load the UART:   
 
a. 

Power down the TM7000 and power it up again.   

b. 

Disconnect the RS-232 cable and reconnect it.   

c. 

Move SW4-8 to the ON position and then back OFF.   

 

*** CAUTION *** 

 

If one of these steps are not done the UART will not reconfigure to the new settings. 

 

The user should select the appropriate settings for their needs.  A brief description of each of the 
subdivisions follows. 

 

A. 

ASCII/BCD FORMAT (Switch S1)

 

 

When the ASCII format is selected, each byte will be an ASCII character as 
detailed in Table One and One-A.  The last two bytes are always CR and LF.  The 
preamble byte and the two quality bytes are optional.  This format is simple to 
process, since all characters are ASCII, but each digit requires a full byte. 

 

When one of the various BCD formats is selected, two digits are packed into each 
byte. These formats are more difficult to process, since each decimal digit must be 
masked and extracted from the byte, but the time message can be transmitted 
faster, since fewer bytes are required. 

 
 

The word length and the data in each byte are shown in the tables in Section 
3.12.8. 

Symmetricom, Inc. 

TM7000 TymMachine TCG/T (Rev D) 

3-45

 

Содержание TM7000

Страница 1: ...TM7000 TymMachine Time Code Generator Translator Revision D User s Guide 8500 0101 March 2006 ...

Страница 2: ...N 1 2 1 4 SPECIFICATIONS 1 4 1 4 1 INPUTS 1 4 A AC POWER POWER ENTRY MODULE J1 1 4 B RS 232 INPUT OUTPUT 9 PIN D CONNECTOR J2 1 5 C HIGH STABILITY EXT TIME BASE INPUT BNC J5 1 5 D PULSE 1PPS INPUT BNC J6 1 6 E CODE INPUT BNC J8 1 6 1 4 2 OUTPUTS 1 7 A MISCELLANEOUS OUTPUTS 15 PIN D CONNECTOR J3 1 7 B MULTICODE DC CODE OUTPUT BNC J4 1 7 C 10MHZ SINE WAVE OUTPUT BNC J5 1 8 D AGC OUTPUT BNC J7 1 8 E ...

Страница 3: ...GURATION 2 3 2 3 RACK MOUNTING PROCEDURE 2 3 2 3 1 TMRA 2 4 2 3 2 ELEVATED OPERATING AMBIENT TEMPERATURE 2 4 2 3 3 REDUCED AIR FLOW 2 4 2 3 4 MECHANICAL LOADING 2 4 2 3 5 CIRCUIT OVERLOADING 2 4 2 3 6 RELIABLE EARTHING 2 4 2 4 CONNECTIONS 2 5 2 5 OPTION CARD INSTALLATION PROCEDURE 2 6 CHAPTER THREE OPERATION 3 0 INTRODUCTION 3 1 3 1 CONTROLS AND INDICATORS 3 1 3 2 CONTROLS 3 1 3 2 1 POWER SWITCH 3...

Страница 4: ... AND SET UP 3 14 3 7 12 SETTING GENERATOR OUTPUTS 3 15 3 7 13 SELECTING ID OR DAYS 3 16 3 7 14 SELECTING LS LEAP SECONDS 3 16 3 7 15 SELECTING GENERATOR SPEED UP MULTI CODE ENCODER 3 16 3 7 16 SELECTING GENERATOR RE GEN MULTI CODE ENCODER 3 17 3 7 17 RS 232 I O OPERATION CONFIGURATION 3 18 3 8 TRANSLATOR OPERATION 3 20 3 8 1 TRANSLATOR CODE INPUT SELECTION 3 21 3 8 2 TRANSLATOR IRIG CODE INPUT SEL...

Страница 5: ...ROL 3 34 H TRANSPORT CONTROL PARAMETERS 3 35 3 11 8 PROGRAMMING TIME OUTPUT REQUESTS 3 35 A TIME OUTPUT REQUEST 3 35 3 11 9 PROGRAMMING STATUS OUTPUT REQUESTS 3 35 A GENERATOR TIME VALUES 3 36 B PROPAGATION DELAY COMPENSATION 3 36 C REQUEST MULTICODE STATUS 3 36 D TRANSLATOR TIME VALUES 3 36 E TRANSLATOR CONTROL SETTINGS 3 37 F TAPE SEARCH START STOP TIME VALUES 3 38 G TAPE TRANSPORT CONTROLS 3 38...

Страница 6: ...9 4 8 7 TRANSLATOR AGC 4 11 4 9 8 STCG TRANSLATOR μP 4 12 4 10 9 TRANSLATOR FILTS 4 14 4 11 10 RS 232 TALKER 4 14 4 12 12 RS 232 I O 4 14 4 13 13 MULTI ENCODER 4 15 4 14 14 MULTI ENCODER PLL 4 15 4 15 DISTRIBUTION BOARD 100008 4 15 4 16 DISPLAY ASSEMBLY 100009 4 15 CHAPTER FIVE OPERATION MAINTENANCE AND ADJUSTMENTS 5 0 INTRODUCTION 5 1 5 1 TOOLS AND TEST EQUIPMENT REQUIRED 5 1 5 2 PREVENTATIVE MAI...

Страница 7: ...LTER ADJUSTMENTS 5 12 5 5 8 PLL CARRIER FILTER TESTS 5 13 5 6 FIRMWARE SOFTWARE UPGRADING 5 14 APPENDIX A OPTION DESCRIPTIONS TM Opt 02A Tape Search with AUX DIP Relays A 1 TM Opt 04B Fast Parallel Outputs BCD A 11 TM Opt 07A RS 232 Interface A 14 TM Opt 14 Serial Encoder A 28 TM Opt 15 Multi Code Serial Encoder A 30 TM Opt 17 Read DC Code A 34 TM Opt 18 Slow Code A 41 TM Opt 27 Video Time Inserte...

Страница 8: ...pters A CHAPTER ONE GENERAL INFORMATION This chapter includes a general description of the TM7000 and provides technical specifications B CHAPTER TWO INSTALLATION Describes initial inspection preparation for use and installation C CHAPTER THREE OPERATION Describes both local and remote RS 232 I O operation of the unit D CHAPTER FOUR THEORY OF OPERATION Provides information on logic description and...

Страница 9: ...or relies upon an input Serial Time Code for its time base This code is typically a member of the IRIG family The carrier frequency of the time code is used for the clock and the time information is automatically set into the major time counter of the Translator Chapter Four Theory of Operation in this User s Guide gives a more detailed description of the Translator The terms derived from both the...

Страница 10: ... OUT IRIG B DC OUT MULTI CODE AC CODE OUT MISCELLANEOUS OUTPUTS MULTI CODE DC CODE OUT EXT TIME BASE IN OR 10MHz SINE WAVE OUT PULSE 1PPS INPUT AGC OUTPUT CARRIER CODE INPUT 1 4 SPECIFICATIONS Refer to the following paragraphs and tables for the specifications applicable to the TymMachine Changes or additions to these specifications if any are listed in Appendix A 1 4 1 INPUTS A AC POWER POWER ENT...

Страница 11: ... 1 lists the connector pin assignments Table 1 1 RS 232 I O J2 Pin Number Designation Pin 1 Not Used Pin 2 RX Pin 3 TX Pin 4 DTR Pin 5 Ground Pin 6 DSR Pin 7 RTS Pin 8 CTS Pin 9 Not Used C HIGH STABILITY EXTERNAL TIME BASE INPUT BNC J5 This external frequency input can be used to supply a high stability time base for the unit The unit will use this external input if connected in place of the inter...

Страница 12: ... DESCRIPTION Note In order for this feature to operate an internal jumper must be properly selected See Operation Chapter Three J22 1 2 3 EXT OSC INPUT ENABLED Symmetricom Inc TM7000 TymMachine TCG T Rev D 1 5 ...

Страница 13: ...pecifications for each which are accepted by this unit Table 1 4 Carrier Code Inputs J8 Formats IRIG A B E G H NASA 28 36 XR3 2137 1892 AN GSQ 53 Carrier Frequencies IRIG A 10kHz IRIG B 1kHz IRIG E 1kHz or 100Hz IRIG G 100kHz IRIG H 1kHz or 100Hz NASA 28 100Hz NASA 36 1Khz XR3 250Hz 2137 1kHz 1892 1kHz AN GSQ 53 250Hz Use XR3 AN GSQ 53 1kHz Use 2137 Modulation Ratio 2 1 to 6 1 Input Signal Level 0...

Страница 14: ... Not Used 14 Not Used 15 Not Used Note 1 Outputs will drive a minimum of 4 0V into a 1K resistor to ground or a maximum of 0 4V into a 1K resistor to 5V All Pulse Rates are 50 50 duty cycle positive edge on time Input Threshold LOSS is adjustable from 0 5 to 10V P P with a carrier frequency of 100Hz 100kHz B MULTICODE DC CODE OUTPUT BNC J4 This output produces a DC level shift serial code that con...

Страница 15: ... Note In order for this feature to operate an internal jumper J22 must be properly selected as shown below J22 1 2 3 10MHz OUTPUT ENABLED D AGC AUTOMATIC GAIN CONTROL OUTPUT BNC J7 This code output is identical to the code input J8 except that the amplitude is normalized at 2 volts peak to peak no load and 1 volt peak to peak into 50 ohms E RS 232 TIME WORD OUTPUT TALKER 9 PIN D CONNECTOR J9 This ...

Страница 16: ...ications of the IRIG B AC Serial Time Code output Table 1 9 IRIG B B120 BCD Time of Year J10 Carrier Frequency 1kHz sine wave Amplitude Adjustable from 0 to 5V Peak to Peak on the Mark Pulse Modulation Ratio Adjustable 3 1 nominal External Load 50Ω minimum G IRIG B DC CODE OUTPUT BNC J11 Connector J11 the IRIG B B000 Serial DC Level Shift Time Code output from the Generator contains Time of Year p...

Страница 17: ...or at multiple speeds Table 1 11 shows the specifications of the Multicode AC Serial Time Code output Table 1 11 Multicode AC Code Output J12 Carrier Frequency Dependant on code selected Amplitude Adjustable from 0 to 5V Peak to Peak on the Mark Pulse Modulation Ratio Adjustable 3 1 nominal External Load 50Ω minimum 1 4 3 INTERNAL TIME BASE This unit can have one of two internal time bases dependi...

Страница 18: ...4 dBc Hz 100 KHz 133 dBc Hz Harmonics 10dBc max Spurious Noise 66dBc B LOW NOISE OVEN OSCILLATOR with the following specifications Output Frequency Waveform 10MHz Sine Wave Aging Rate 5 x 10 10 per day 5 x 10 8 per year Temperature Stability 1 x 10 8 over a temperature range of 20ºC to 75ºC Note This temperature range applies only to the crystal The TCG T is rated at 0o to 50o C Mechanical Frequen...

Страница 19: ...5 Relative Long Term Storage 1 year 20o C to 35o C Because the TM7000 contains a battery when storing for more than 1 year charge at least once a year i e turn on the unit and let it run for at least 24 hours to prevent battery leakage and deterioration in performance due to self discharging 1 4 5 SIZE AND CONFIGURATION Table 1 13 shows the physical size and configuration of the TymMachine Table 1...

Страница 20: ...er input voltage and voltages within the Power Supply The following CAUTION label will appear in this manual where precautionary measures should be taken CAUTION The AC Power input module utilizes a power supply which has an input range of 85 to 264 volts This voltage is only exposed to personnel when the Top Cover of the unit is removed This High Voltage exists in the right rear corner of the uni...

Страница 21: ...CHAPTER ONE This Page Intentionally Left Blank 1 14 TM7000 TymMachine TCG T Rev D Symmetricom Inc ...

Страница 22: ... any changes this can most conveniently be done before installation See the Top Assembly Drawing for the location of assemblies The Top Cover of the unit needs to be removed to access any of the jumpers or internal switches 2 2 1 POWER SUPPLY The Power Supply in this unit has an input operation range of 85 to 264 Volts AC 47 to 440 Hz therefore no jumpers are required 2 2 2 SYNCHRONIZED TIME CODE ...

Страница 23: ...URATION JUMPER R88 R96 and R97 PLL ADJUSTMENTS FACTORY ONLY R86 R100 and R101 IRIG B RATIO PHASE and AMPLITUDE ADJUSTMENTS J21 RS 232 TALKER CONFIGURATION JUMPER RS 232 TALKER CONFIGURATION SWITCHES J23 FOR DEVELOPMENT FACTORY ONLY R184 10MHz OUTPUT AMPLITUDE ADJUSTMENT R132 LOSS OF SIGNAL THRESHOLD ADJUDTMENT 2 2 TM7000 TymMachine TCG T Rev D Symmetricom Inc ...

Страница 24: ... the translated time or in the automatic mode to output the time displayed on the LED Display Note The factory default setting for this jumper is Automatic 1 2 3 4 1 2 3 4 GENERATOR TRANSLATOR J21 AUTOMATIC 1 2 3 4 Note The mode number of bits in the output word BAUD rate parity etc of the RS 232 Talker should be changed at this time if desired Refer to Chapter Three 2 3 RACK MOUNTING PROCEDURE Th...

Страница 25: ...at rise if sufficient air flow is not available Installation should be such that the amount of air flow required for safe operation of the equipment is not compromised 2 3 4 MECHANICAL LOADING Mounting of the equipment in the rack should be such that a hazardous condition is not achieved due to an uneven mechanical loading 2 3 5 CIRCUIT OVERLOADING Consideration should be given to the connection o...

Страница 26: ...ided b Make appropriate connections to TymMachine Input Output connectors to the rear panel of the TymMachine as well as any Option Assemblies Note Input Output cable assemblies are not supplied and must be fabricated using the connector plugs supplied with the TymMachine Refer to Chapter One and the Option Description s for connector type J numbers and pin assignments c Connect a Carrier Modulate...

Страница 27: ...r panel option areas labeled M1 to M4 Remove the six screws that hold the Rear Panel Option Plate and the Option Plate Blanks to the chassis Refer to Figure 2 4 c Configure and verify the settings of the option card Refer to the Option Description supplied with the card or furnished in Appendix A of this User s Guide d Insert the module into the selected option slot being careful that the componen...

Страница 28: ...he operator 3 1 CONTROLS AND INDICATORS With the exception of the POWER switch located on the rear panel Power Entry Module all of the normal operating controls of the TM7000 are located on the front panel Their purposes and functions are described in the following paragraphs Note The outputs jumper selections potentiometers etc described in this Operation Chapter are derived from and located on t...

Страница 29: ...EV switches See Figure 3 1 are used to make the selections within a menu Most menus have a function on the top line and selections on the bottom line The bottom line thereby identifies the purpose of the SELECT switches The purpose of these switches change when the menu changes When two or more switches are below a legend any one of them may be used for that selection 3 2 5 INTERNAL JUMPERS LOCATE...

Страница 30: ... 1 2 3 10MHz OUTPUT ENABLED J22 1 2 3 EXT OSC INPUT ENABLED Note The factory default setting for this jumper is Ext Osc Input Enabled 3 3 INDICATORS The following paragraphs give an explanation of the indicators used in this unit 3 3 1 LCD DISPLAY The LCD Display is used to display menus for operator prompting instrument status and the function of the select switches The LCD Display is located on ...

Страница 31: ...ect on the internal backup time keeping circuitry although POWER must be ON to charge the backup battery When power is first applied to the unit a self test and diagnostic procedure is performed During the several seconds this takes the condition of the displays are indeterminate Following self test the Versatile Display Function Menu as shown in Figure 3 5 1 will be displayed on the LCD Display T...

Страница 32: ...ing Message shown in Figure 3 6 1 will appear to remind the user of a mode change Warning Message Figure 3 6 1 WARNING This selection will change time Output and LED display PROCEED YES NO The unit will only proceed to a different mode if YES is selected from this menu If NO is selected the unit will revert to the previous menu and the mode will remain intact In this chapter each menu will be depi...

Страница 33: ...cess to the SET UP Generator menu screen will appear on the LCD Display Pressing either of the switches directly below OPERATE will select the OPERATE Generator menu screen to appear on the LCD Display Pressing the NEXT switch will advance the LCD display to the Select Versatile Display Function Menu screen shown in Figure 3 6 4 1 3 6 4 VERSATILE DISPLAY FUNCTION MENU This display the Versatile Di...

Страница 34: ...e so you can go directly to the SETUP menu and preset the time Conversely if the Generator is running it may be desirable to go to the OPERATE menu and stop the Generator before presetting time It is not necessary to stop the Generator to preset time so a shift to daylight savings time for example can be easily accomplished Select Generator Mode Menu Figure 3 7 1 Select generator MODE SET UP OPERA...

Страница 35: ...ph 3 7 4 Sync Verify Operation for an explanation of the Sync Verify selection Selecting 1PS TRACKING will change the LCD Display to the 1PPS Tracking Control Menu See Paragraph 3 7 5 and Figure 3 7 5 1 3 7 2 ADVANCE RETARD OPERATION Selecting ADV RET from the menu screen shown in Figure 3 7 1 1 changes the LCD to the ADV RET Menu Screen shown in Figure 3 7 2 1 This menu provides the controls for ...

Страница 36: ...e DISC ON OFF switches control the function The SYNC GEN must be enabled for disciplining to operate in the SYNC GEN mode Disciplining provides an analog voltage for control of the internal oscillator It will not work with the external oscillator DISC ON OFF also functions with 1PPS Tracking if enabled The internal oscillator may be adjusted while tracking to minimize the tracking rate See Chapter...

Страница 37: ...hronizing to the input code and synchronized will appear momentarily when synchronization is complete The LCD Display will then return to the SYNC Select Menu Figure 3 7 1 2 If the input is bad or has not been properly selected a fault message will appear Pressing the NEXT or PREV switch changes the LCD Display to the Generator Operate Menu Figure 3 7 1 1 3 7 5 1PPS TRACKING OPERATION See SYNC Sel...

Страница 38: ...lay to the SYNC Select Menu Figure 3 7 1 2 3 7 6 GENERATOR SET UP Selecting SET UP from the Select Generator Mode Menu Figure 3 7 1 leads to the Generator Set Up Menu screen shown in Figure 3 7 6 1 This menu provides a selection of other menus to set up the Generator and the Computer I Os Generator Setup Menu Figure 3 7 6 1 Set up generator INPUTS OUTPUTS RS232 488 BUS GPIO Selecting NEXT will rev...

Страница 39: ...ME Selecting TIME from the Set Up Generator Inputs Menu Figure 3 7 7 1 by pressing a switch below TIME will generate the Preset Time Display Menu shown in Figure 3 7 8 1 on the LCD Display Preset Time Display Menu Figure 3 7 8 1 PRESET GENERATOR 0 LY X XXX XX XX XX 0 1 2 3 4 5 6 7 8 9 CURSOR This menu is used for setting Time of Year into the Generator Presetting is accomplished by using the switc...

Страница 40: ...nu Set Propagation Delay Screen Figure 3 7 9 1 Select desired PROP DELAY mS XXX XXXX 0 1 2 3 4 5 6 7 8 9 CURSOR Any propagation delay or advance compensation between 4 999mS and 997 0000 mS milliseconds may be selected Moving the cursor left through the sign or will change it The Generator must be stopped to enter a Propagation Delay When this menu is selected the cursor will be on the far left di...

Страница 41: ...he LCD Display to show Control Function Bits 9 through 17 which allows for setting Control Function Bits 9 through 17 Pressing the NEXT switch while Control Function Bits 9 through 17 are shown will change the Control Function Bits to 18 through 26 allowing them to be changed Pressing the PREV switch while any of the above screens are shown will change the LCD Display to the last previous screen s...

Страница 42: ...be used to start the TM7000 is accomplished by using a switch located below the desired edge to be used either Pos or Neg The selected edge will be displayed on the LCD Display in uppercase letters Pressing the switch under ARM will cause a decimal point on the TENS of HOURS LED on the LED Time of Year Display to illuminate indicating the unit is armed It will then start the Generator on the selec...

Страница 43: ... Figure 3 7 12 2 will allow the generator speed up rate to be selected as shown in Figure 3 7 15 1 below Select Generator Speed Up Menu Figure 3 7 15 1 Select Desired Generator Speed up X1 X2 X4 X8 X16 X32 X64 The SPEED UP menu relates to the generator only When sped up most generator functions are inhibited including the parallel outputs video time insertion and J10 J11 serial code output START S...

Страница 44: ...ssed from the above menu using the NEXT button under the LCD display Only installed channel numbers are displayed Multiple encoders may be assigned the same channel number during installation or each encoder may be assigned a different channel number Channels are numbered in hex from 1 to C All other numbers are illegal Set ups are stored and remembered through power outages The term re generation...

Страница 45: ... 1 stop bit Select BAUD Rate Figure 3 7 17 1 Select Baud Rate SLOWER 1200 FASTER Pressing a switch under either SLOWER or FASTER will increase or decrease the BAUD rate from that currently displayed Available baud rates are 50 75 110 134 5 150 300 600 1200 1800 2400 3600 4800 7200 9600 19200 and 38400 The receiver and transmitter are always set to the same baud rate Pressing the PREV switch will r...

Страница 46: ...h is always eight bits if PACKED BCD output format is selected while either seven bit or eight bit character length may be selected if the ASCII output format is used Naturally the input character length is always the same as the output character length Select a word length of seven and the ASCII word output format SEVEN Figure 3 7 17 7 Word Length Word Output Format SEVEN eight ASCII packed bcd S...

Страница 47: ...play Function Menu Figure 3 8 1 Select VERSATILE DISPLAY function GENERATOR TRANSLATOR TAPE SEARCH Warning Message Figure 3 8 2 WARNING This selection will change time Output and LED display PROCEED YES NO The unit will only proceed to a different mode if YES is selected from this menu If NO is selected the unit will revert to the previous menu and the mode remains intact Selecting YES from the Wa...

Страница 48: ... SELECTION The following menus and descriptions are used to allow the user to select type of Serial Time Code being input to the Translator Select Desired Code Family Menu Figure 3 8 1 1 Select Desired Code Family IRIG NASA XR3 2137 OTHER Selecting IRIG by pressing the switch below IRIG leads to the Select Desired IRIG Code Menu as shown in Figure 3 8 2 1 on the LCD Display allowing the user to se...

Страница 49: ...e in Appendix A 3 8 3 TRANSLATOR NASA CODE INPUT SELECTION The Select Desired NASA Code Menu Figure 3 8 2 1 is used to select the NASA code to be translated If the code has previously been selected skip to the Translating Menu Figure 3 8 5 1 by pressing NEXT To select a code push the corresponding switch Pressing the PREV switch while the Translating Menu is shown on the LCD Display will return it...

Страница 50: ...enu is shown on the LCD Display will return it to the Select Desired Code Family Menu Figure 3 8 1 1 3 8 5 TRANSLATING MENU This menu is normally displayed while translating It shows the code being translated and the Filter Direction and Polarity selected Translating Menu Figure 3 8 5 1 FILTER DIRECTION Translating SEL CODE IN OUT rev auto FWD Pol NORM inv When any switch under FILTER IN OUT is se...

Страница 51: ...ay to the Select Versatile Display Function Menu Figure 3 8 1 allowing the user to select the TM7000 operating mode in which to operate 3 8 6 FILTERS The Select Filters LCD Display as shown in Figure 3 8 6 1 provides for the enabling and disabling of independent filters for the Envelope and Carrier of the input code When the IN below CARRIER FILTER is selected IN will be displayed in upper case le...

Страница 52: ...rier Filter have to be selected IN Play Search Speed Menu Figure 3 8 6 2 PLAY SPEED RATIO SEARCH SPEED RATIO SLOWER 1 1 FASTER SLOWER 1 1 FASTER This menu provides for selecting the frequency of the filters during Playback operation and optionally Search operation Filters are selected as a multiple of the real time rate in accordance with the previously selected code If only the Envelope Filter is...

Страница 53: ... jumper J22 must be selected as shown below J22 1 2 3 EXT OSC INPUT ENABLED Note This rear panel BNC is also used for 10MHz Sine Wave Output Operation See Section 3 10 so it is important that the above jumper be selected for the desired feature External Oscillator Input Enabled is the factory default setting for this jumper 3 10 10MHZ SINE WAVE OUTPUT On rear panel BNC connector J5 the TM7000 can ...

Страница 54: ...could lead to erroneous or incompatible commands It should also be noted that after having used the RS 232 I O for set up control this configuration can be overwritten by the local controls Note The handshake lines DTR DSR RTS AND CTS are used in this assembly If not required by the user DTR and RTS both options must be pulled up through a jumper to pin 11 in the connector Terms followed by design...

Страница 55: ... the TM7000 is a string of six ASCII characters which always begins with two slash characters The sixth character is often followed by a data character as in the case of setting the time of the generator 3 11 3 TO ENTER SETUP AND CONTROL DATA a The computer DTE initiates the handshake by asserting DTR The TM7000 responds by asserting DSR b The computer then asserts RTS The TM7000 responds by asser...

Страница 56: ...mand is to be sent Alternatively the computer may remove RTS but continue to assert DTR in anticipation of a later command transmission Note If RTS is removed by the computer prior to completion of a time or status output message the TM7000 will finish the current character if one is in progress and then pause until RTS is asserted again at which time the output message will be completed If DTR is...

Страница 57: ...ENABLED k102 Synchronized Time Code Generator DISABLED B SLOW CODE FRAME PERIOD SELECTION k000 1 Second k004 5 Seconds k008 10 Seconds k010 60 Seconds k018 600 Seconds C SET TIME CODE GENERATOR TIME kk00 Stop the Generator kk99 Start the Generator k70YL Set Leap Year YL is 0 1 2 or 3 0 Leap Year k60DH Set Hundreds of Days digit DH 0 9 k5DTDU Set Tens and Units of Days digits DT 0 9 DU 0 9 k4HTHU S...

Страница 58: ... RATIO Playback Search Playback Record Ratio L000 L100 1 128 Slow Playback L001 L101 1 64 Slow Playback L002 L102 1 32 Slow Playback L003 L103 1 16 Slow Playback L004 L104 1 8 Slow Playback L005 L105 1 4 Slow Playback L006 L106 1 2 Slow Playback L007 L107 1 1 Realtime Playback L008 L108 2 1 Fast Playback L009 L109 4 1 Fast Playback L00j L10j 8 1 Fast Playback L00k L10k 16 1 Fast Playback L00L L10L...

Страница 59: ...nslate L220 Select forward direction L201 Select reverse direction L221 Select Auto direction kL41 Carrier filter on Envelope filter off kL81 Envelope filter on carrier filter off kLL1 Both filters on kL01 Both filters off 3 11 7 PROGRAMMING THE TAPE SEARCH CONTROL OPTION The TM7000 can be programmed to automatically search for any number of Tape Search Intervals up to a maximum of ten In the foll...

Страница 60: ...econd B SELECT PROGRAMMED TAPE SEARCH INTERVAL jL0X Select Last Interval first interval is always interval 0 jm0X Select spcific single interval C SELECT TAPE TRANSPORT DELAY j301 1 Second j302 2 Seconds j304 4 Seconds j308 8 Seconds j30L 12 Seconds j310 16 Seconds j312 18 Seconds j314 20 Seconds D EARLY CLOSURE DELAY SELECTION j500 0 Delay j501 1 Second j502 2 Seconds j503 3 Seconds j506 6 Second...

Страница 61: ... j602 Single Cycle Single Interval Mode j604 Single Cycle Multiple Interval Mode j607 Auto Record j609 Recycle Mode j60j Start Search j60L Stop G MANUAL SEARCH TAPE MOTION CONTROL j700 Forward j701 Fast Forward j702 Reverse j703 Fast Reverse j704 Stop j705 Record Note To record first send Record j705 command followed by the appropriate direction j700 or j702 command 3 34 TM7000 TymMachine TCG T Re...

Страница 62: ...ntary Direction First Speed Momentary 3 11 8 PROGRAMMING TIME OUTPUT REQUESTS A TIME OUTPUT REQUEST komn Generator Time Word Output komo Translator Time Word Output Time is output as either a string of ASCII characters or as Packed BCD characters Please see Figures One and Two for the output format definitions 3 11 9 PROGRAMMING STATUS OUTPUT REQUESTS Each status requests returns a single 8 bit ch...

Страница 63: ...e ko02 0 1 Sec 0 01 Sec ko01 0 001 Sec 0 0001 Sec ko00 0 00001 Sec 0 000001 Sec C REQUEST MULTICODE STATUS nX00 00 Generate IRIG B nX00 06 Generate IRIG A nX00 0 Generate IRIG G nX00 3 Generate 2137 nX00 42 Generate NASA 36 nX00 5 Generate XR3 250 nX00 60 Generate ANGSQ53 250 Note X equals the channel encoder number The basic STCG is number 1 Optional plug ins can be any number from 1 7 D TRANSLAT...

Страница 64: ...ating IRIG C 100 ko8o 30 Translating IRIG C 1K ko8o 3L Translating 2137 or GSQ53 1K ko8o 42 Translating NASA 36 ko8o 4n Translating NASA 28 ko8o 54 Translating 1892 ko8o 5j Translating XR3 or GSQ53 250 kok7 00 Normal Code Polarity kok7 99 Inverted Code Polarity L500 01 Forward direction L500 20 Reverse direction L500 21 Auto direction kL02 0 Both filters on KL02 4 Envelope filter on kL02 8 Carrier...

Страница 65: ... Units of Minutes LoX2ST SU Stop Time Tens Units of Seconds LoX1S 1 S 01 Stop Time tenths hundredths of Seconds LoX0S 001 0 Stop Time milliseconds G TAPE TRANSPORT CONTROLS Response values are Hex Command Status Response Loj3 01 TTD 1 Second Loj3 02 TTD 2 Seconds Loj3 04 TTD 4 Seconds Loj3 08 TTD 8 Seconds Loj3 0C TTD 12 Seconds Loj3 10 TTD 16 Seconds Loj3 12 TTD 18 Seconds Loj3 14 TTD 20 Seconds ...

Страница 66: ...he Search Interval 1 Outside the Search Interval Bit 2 0 Early Interval Start Time Forward Playback mode 1 Not Early Interval Bit 3 0 Forward command is asserted 1 Forward command is not asserted Bit 4 0 Reverse command is asserted 1 Reverse command is not asserted Bit 5 0 Record command is asserted 1 Record command is not asserted Bit 6 0 Stop command is asserted 1 Stop command is not asserted Bi...

Страница 67: ... 8 4 2 1 0 0 0 0 Bit Index Byte 1 2 3 4 5 6 7 Packed BCD Format Time Word Output TABLE 3 1 Notes a Word 1 is output first b When Translator Time is output ERR indicates an error in the input code and LOS indicates a low time code input amplitude c When Generator Time is output ERR and LOS have no meaning d The bits marked X have no meaning and should be ignored 3 40 TM7000 TymMachine TCG T Rev D S...

Страница 68: ...eed 0 0 0 0 X X E R R L O S ASCII Format Time Word Output Bit Index Byte 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 TABLE 3 2 Notes a Word 1 is output first b When Translator time is output ERR indicates an error in the input code and LOS indicates a low time code input amplitude c When Generator Time is output ERR and LOS have no meaning d The bits marked X have no meaning and should be ignored Symmetri...

Страница 69: ... and Data Terminal Equipment DTE The major differences between the two configurations are their rules and pin assignments DTE is designated as the initiator of the commands DCE is designated as the responder to the commands This terminal talker is configured as DCE It is important to remember that most computer RS 232 communication ports are set up in the DTE configuration which dictates that this...

Страница 70: ...age output Rate once every second The operation of an individual switch is When a switch in this example Switch 1 is set to the ON position the voltage for that selected line is low or 0 volts This equates to a binary 0 ON 1 When a switch in this example Switch 1 is set to the OFF position the voltage for that selected line is high or 5 volts This equates to a binary 1 ON 1 A SYNCHRONOUS MODE Swit...

Страница 71: ...e asynchronous mode the time output rates described in Synchronous Mode will be ignored The user must select an 8 bit character any hex value from 00 to FF as a time demand character The user sends the selected character to this unit which causes a time message to be output in response ON 8 7 6 5 4 3 2 1 S4 SW SW POSITION DESCRIPTION 1 ON 0 ASYNCHRONOUS OFF 1 SYNCHRONOUS DEFAULT 2 ON 0 7 BIT WORD ...

Страница 72: ...tings The user should select the appropriate settings for their needs A brief description of each of the subdivisions follows A ASCII BCD FORMAT Switch S1 When the ASCII format is selected each byte will be an ASCII character as detailed in Table One and One A The last two bytes are always CR and LF The preamble byte and the two quality bytes are optional This format is simple to process since all...

Страница 73: ...le settings for parity none odd and even The settings are valid in both ASCII and BCD message formats If parity is set to odd or even then the parity will be added to the output word For example if the UART is set to 8 data bits 1 stop bit and odd parity then the entire transmitted word is 11 bits in length 1 start bit 8 data bits 1 parity bit 1 stop bit 11 bits E WORD LENGTH Switch S4 The word le...

Страница 74: ... 0 1 DEFAULT ON 0 OFF 1 1 OFF 1 ON 0 1 5 OFF 1 OFF 1 2 SW 7 SW 8 PARITY ON 0 ON 0 NONE ON 0 OFF 1 ODD OFF 1 ON 0 EVEN OFF 1 OFF 1 NONE DEFAULT In the above example the BAUD rate is 9600 with 1 stop bit and odd parity F PREAMBLE Switch S1 The preamble is always a hex 02 character ASCII character STX Start of Text If enabled this will be the first byte out in either the ASCII or BCD message format G...

Страница 75: ...nput signal Quality 2 byte is set to ASCII E hex 46 indicating an error in the input time code An ASCII space hex 20 is set in both Quality 1 and 2 if there are no errors ON 8 7 6 5 4 3 2 1 S1 SW SW POSITION DESCRIPTION 6 ON 0 PREAMBLE OFF 1 NO PREAMBLE SW SW POSITION DESCRIPTION 7 ON 0 QUALITY INDICATOR OFF 1 NO QUALITY INDICATOR SW SW POSITION DESCRIPTION 8 ON 0 POSTAMBLE OFF 1 NO POSTAMBLE DEFA...

Страница 76: ...ree modes Automatic The time that is displayed on the front panel is the time that is output Generator Only the generated time will be output Translator Only the translated time will be output Note If the talker is selected to output translator time and there isn t a code input to the unit the time output will be invalid Time data jumper selection J21 AUTOMATIC 1 2 3 4 1 2 3 4 1 2 3 4 GENERATOR TR...

Страница 77: ...8 4 2 1 0 0 1 1 TS 4 2 1 0 0 1 1 US 8 4 2 1 0 0 1 1 0 0 1 1 8 4 2 1 0 0 1 1 4 2 1 0 0 TH 2 1 UH TM 0 0 1 0 0 1 1 0 0 0 0 0 0 1 0 1 0 0 0 0 0 1 1 0 1 0 1 0 0 0 1 0 1 In order to output the format shown in Table 3 3 set the RS 232 select switches as follows Specific configurations such as Mode and BAUD rate etc aren t shown SWITCH LOCATION AND SECTION SWITCH POSITION DESCRIPTION S1 section 5 ON 0 AS...

Страница 78: ...2 Word 3 Word 4 0 0 Word 5 Word 6 Word 7 0 0 1 1 TM 4 2 1 0 0 0 1 1 UD 8 4 2 1 0 0 1 1 UM 8 4 2 1 0 0 1 1 TS 4 2 1 0 Word 8 Word 9 Word 10 Word 11 Word 12 Word 13 30H Word 14 CR Word 15 LF 0 0 1 1 US 8 4 2 1 0 0 1 1 tS 8 4 2 1 0 0 1 1 hS 8 4 2 1 0 0 1 1 mS 8 4 2 1 0 0 1 1 0 0 0 0 0 0 0 0 1 1 0 1 0 0 1 1 1 0 1 0 Symmetricom Inc TM7000 TymMachine TCG T Rev D 3 51 ...

Страница 79: ...4 2 1 TD 8 4 2 1 UD 8 4 2 1 Word 4 Word 5 Word 6 Word 7 Word 8 Word 9 Quality Word 10 Postamble tS 8 4 2 1 mS 8 4 2 1 0 0 TH 2 1 0 4 2 1 0 TM TS 4 2 1 0 0 0 0 0 0 0 0 0 0 L E 1 1 0 1 1 0 1 0 Optional Optional In order to output the format shown in Table 3 5 set the RS 232 select switches as follows Specific configurations such as Mode and BAUD rate etc aren t shown SWITCH LOCATION AND SECTION SWIT...

Страница 80: ... 3 6 set the RS 232 select switches as follows Specific configurations such as Mode and BAUD rate etc aren t shown SWITCH LOCATION AND SECTION SWITCH POSITION DESCRIPTION S1 section 5 OFF 1 BCD selected on S1 section 6 OFF 1 Preamble selected off S1 section 7 OFF 1 Quality Indicator selected off S1 section 8 OFF 1 Postamble selected off S4 section 2 OFF 1 8 Bit Word selected S4 section 5 ON 0 Form...

Страница 81: ... HD 1 2 4 8 In order to output the format shown in Table 3 7 set the RS 232 select switches as follows Specific configurations such as Mode and BAUD rate etc aren t shown SWITCH LOCATION AND SECTION SWITCH POSITION DESCRIPTION S1 section 5 OFF 1 BCD selected on S1 section 6 OFF 1 Preamble selected off S1 section 7 OFF 1 Quality Indicator selected off S1 section 8 OFF 1 Postamble selected off S4 se...

Страница 82: ... 3 8 set the RS 232 select switches as follows Specific configurations such as Mode and BAUD rate etc aren t shown SWITCH LOCATION AND SECTION SWITCH POSITION DESCRIPTION S1 section 5 OFF 1 BCD selected on S1 section 6 OFF 1 Preamble selected off S1 section 7 OFF 1 Quality Indicator selected off S1 section 8 OFF 1 Postamble selected off S4 section 2 OFF 1 8 Bit Word selected S4 section 5 ON 0 Form...

Страница 83: ...CHAPTER THREE This Page Intentionally Left Blank 3 56 TM7000 TymMachine TCG T Rev D Symmetricom Inc ...

Страница 84: ...u back to the source of that signal In each of the schematics there will be a number such as U4 U8 U11 etc These numbers refer to the physical location on this assembly for that particular integrated circuit element In order to determine a physical location of an integrated circuit one would merely refer to the Top Assembly drawing On this drawing each assembly contained within the Basic instrumen...

Страница 85: ...izes the time accumulators Minor Time and includes switches to select and enter the Time of Day into the Major Time Accumulator Parallel to Serial Converter This section consists of scan gates that serialize the contents of the accumulator into a continuous pulse train Formatter This section uses pulse rates from the Minor Time Counter to obtain the pulse widths and index pulses required to provid...

Страница 86: ...vides the terms necessary to index the digital data contained in the input code This allows the locating of each code bit and the proper assignment to accumulator storage They also provide a 1PPS signal to update the Time Accumulator Time Accumulator This counter stores the value being read from the input code It is updated with the 1PPS signal from the Frequency Dividers and is permuted to count ...

Страница 87: ...d are Operator controls Display The Power Supply and Chassis are shared SERIAL TO PARALLEL CONVERTER TIME ACCUMULATOR DISPLAY SCAN TERMS 1PPS INPUT AMPLIFIER f t SYNC READ GEN FORMATTER OUTPUT AMPLIFIER Figure 4 1 3 Typical Time Code Generator Translator MINOR TIME MAJOR TIME COUNTER CONTROL FREQUENCY GENERATOR FREQUENCY DIVIDER FREQUENCY DIVIDER PARALLEL TO SERIAL CONVERTER 4 4 TM7000 TymMachine ...

Страница 88: ...performed by a mixture of hardware and firmware A functional block diagram of the TM7000 TymMachine may be found in Figure 4 2 1 The TymMachine is a Microprocessor based system The Microprocessor used a 65C02 has an eight bit data bus and a non multiplexed 16 bit address bus The processor in the GENERATOR assembly is used as a system controller for handling internal and external Optional I O as we...

Страница 89: ...0013 AC CODE OUTPUT PROPAGATION DELAY U14 18 23 PULSE INPUT MODULATOR VIA U15 UART U19 J2 RS 232I O RS 232 INTERFACE GENERATOR TRANSLATOR J3 MISCELLANEOUS OUTPUTS PLD U17 ROM U11 PLL U9 MUX U10 DAC U6 AC CODE OUT MULTI ENCODER P O PLD U23 UART U22 J9 RS 232 TALKER RS 232 TALKER OP ASSEMBLY M1 TION M4 CODE OUTPUT DC CODE OUT AC INPUT DC CODE OUTPUT FIGURE 4 2 1 STCG BLOCK DIAGRAM U50 Y2 3 J5 J22 U3...

Страница 90: ...d J5 The level may be adjusted with R184 U14 is a programmable counter which measures the time between the generated 1PPS and the reference from translator or external 1PPS to start or steer the generator U18 is a digitally programmable one shot used to implement vernier 100nS propagation delays U25 holds the configuration data for the PLD U23 4 5 6 STCG GENERATOR CODE This logic includes derivati...

Страница 91: ...ns the program which the Microprocessor executes When an address of 1000 Hex or more is on the address bus the ROM outputs to the data bus while 2 is high The RAM U16 is used for temporary storage of data and variables The RAM used in the TymMachine is a combination of static RAM SRAM and electrically erasable PROM E2 PROM The internal configuration provides a byte of E2 PROM for every byte of RAM...

Страница 92: ...to debounce the Keyboard VUSR PB0 outputs W which is used to write to the LED Display VUSR PB1 outputs ENL which enables the LCD Display VUSR CA2 is used as a Power Fail FP output during the Power Down sequences to prevent multiple sequencing VUSR PB4 is used as a Clock Inhibit C1H for the Backup Clock VUSR PB5 is used as an input to sample the Power On PON status during Power Down and Power Up se...

Страница 93: ...splay connected The LCD Display is a Microprocessor based subsystem which must interact with the Generator Microprocessor for correct operation Also note that the pin numbers shown at J103 on 5 do not correspond to the LCD Display manufacturer s data This is because different numbering systems are used Finally VCOM CB1 and CB2 are used to shift out the DC envelope DCC of the IRIG B Serial Time Cod...

Страница 94: ...ly This logic contains the input amplifier AGC and the code strippers required to normalize the input and to derive the necessary clock signals for the decoder The AGC amplifier is wide band to make the unit operational where variations of input signal frequency as well as amplitude are experienced such as in Tape Search applications Generally if a Translator is used as a single purpose unit such ...

Страница 95: ... crossing detector with hysteresis on the negative edge The positive on time edge coincides with the positive zero crossing of the input code C detector U44 pins 9 10 and 12 detects the Mark Amplitude cycles of the input code B and C are used by the decoders which are located in U23 C is also used by the activity sensing circuitry described above A secondary function of the activity sensor is to i...

Страница 96: ...oup has been assembled U27 outputs Byte Ready Enable TBREN TBREN is synchronized and then input to U31 a Versatile Interface Adapter VIA TBRDY latches the time data into the VIA It also latches U27 outputs TBA0 TBA3 into the VIA TBA0 TBA3 are validating bits When these bits are latched the VIA issues an interrupt to the Microprocessor which then performs the firmware part of the decoding process O...

Страница 97: ...0 4CAR is used to clock U23 which outputs TCAR90 The Analog Switches U40 are used to select the frequency and range of the Phase Locked Loop See Chapter Five Maintenance in this manual for testing of the LPF Envelope Filter and the Carrier Filter PLL Adjustments to the PLL are also found in Chapter Five 4 11 10 RS 232 TALKER The RS 232 talker is used to burst time out periodically U23 provides the...

Страница 98: ... is used to select appropriate parts for the loop filter in accordance with the selected frequency and dividers INH SEL0 and SEL1 are written by U24 through U17 to U12 4 15 DISTRIBUTION BOARD 100008 The TymMachine contains one 100008 Distribution Board Assembly Option Plug in Assemblies are installed into the Distribution Board Assembly This assembly has provisions for installing up to four single...

Страница 99: ...CHAPTER FOUR This Page Intentionally Left Blank 4 16 TM7000 TymMachine TCG T Rev D Symmetricom Inc ...

Страница 100: ...Your equipment which comes in contact with finished units should be properly grounded to prevent random voltage spikes This section describes the general techniques for maintenance of timing equipment Special maintenance information if required is included with the option descriptions 5 1 TOOLS AND TEST EQUIPMENT REQUIRED No tools or equipment are supplied with this unit The following is a list of...

Страница 101: ...To clean the display surface dampen a soft cloth slightly with clean water and wipe gently Do not use organic solvents such as alcohol b To check the inside of the unit for excessive dust or foreign matter first remove the AC Power and then remove the top cover c If the internal component surfaces and or components have and excessive amount of dust deposited on them use a soft brush or low pressur...

Страница 102: ...oblems and possible causes When the user attempts to access an optional assembly and gets the Selection Not Installed Display as shown in Figure 5 3 1 the option is either not available not properly installed or has failed and should be replaced Selection Not Installed Display Figure 5 3 1 Selected option is not installed Call your DATUM representative In the event this message is displayed the us...

Страница 103: ...ISPLAY function GENERATOR TRANSLATOR TAPE SEARCH Table 5 1 Self Test Fault Pass Table Indication Test Passed 1 VCOM ORB U29 2 VUSR ORA U13 3 VCOM ORA U29 4 U23 5 LCD DISPLAY As each test is passed the number of that test is displayed 5 will be displayed momentarily at the end of a successful test For example if the Self Test failed and an 4 was displayed it would indicate that the LCD test failed ...

Страница 104: ...loading down the power supply If bad replace Power Supply Check for a 5 Volt output at pin 3 of A1 a Three Terminal Regulator See Figure 5 3 3 at the end of this table LED and LCD displays illuminate and all Power Supply Voltages are present on STCG Assembly However the LED display updates slowly or not at all This assumes the generator is started Check for presence of a 10MHz signal at the center...

Страница 105: ...perate Replace LCD Display Unit will not Translate or Sync to the Code input at J8 Possibly wrong input code or filter selected Check Input Code selected Possible AGC Code Stripper problem Check TP4 for a CMOS level square wave at the rate of the selected Code Input Check TP3 for a C signal Check the AGC Stripper circuitry TP2 if there are no signals at TP4 and TP3 Table 5 3 J32 Power Connector Pi...

Страница 106: ...Plug in options can be readily replaced by removing the power source removing the option and replacing it if a spare is available If an option has failed and cannot be replaced it should nonetheless be removed with power turned OFF to prevent possible effects on the rest of the unit The following procedure should be adhered to when removing and reinstalling any option card assembly Refer to Figure...

Страница 107: ...emove the screws or nuts which secure the module to the chassis Modules are replaced by reversing the above procedure Take special care that all cables are correctly connected or the unit could be damaged 5 5 ADJUSTMENTS AND TESTS The following are adjustment and tests used to check adjustments if applicable The adjustments have been divided into two categories Those that are routine adjustments a...

Страница 108: ...ABLE e Adjust the COARSE oscillator adjustment with an insulated tuning tool for the most stable display possible It should not drift either left or right B OPTIONAL OVEN OSCILLATOR ADJUSTMENT location Y3 if applicable a If the generator isn t running start it From the Versatile Display function menu select GENERATOR OPERATE START b Remove the dust cap screw from the side of oscillator c Sync one ...

Страница 109: ...he code output on an oscilloscope adjust R100 labeled PHASE for minimum discontinuity at the modulation points of the code This is the point where the sine wave goes from a Mark amplitude to a Space near the zero crossing point c Amplitude Adjustment While observing the code output on an oscilloscope adjust R101 labeled LEVEL for a 3 0 2 Volts peak to peak or desired amplitude d Modulation Ratio A...

Страница 110: ...W slowly adjust CW until the signal at J3 Pin 11 LOS goes true then turn CCW until LOS goes false 5 5 6 MULTI ENCODER CODE OUTPUT ADJUSTMENTS Routine Adjustments a From the Select VERSATILE DISPLAY Function menu select sequentially GENERATOR SET UP OUTPUTS RE GEN b Select B or other desired code by pressing the switch directly below it and observe it to blink c Connect the rear panel BNC connector...

Страница 111: ...EED RATIO screen to appear e The PLAY SPEED RATIO must be set to 1 1 If it is not set to 1 1 it may be set to 1 1 by pressing a switch under slower or faster until 1 1 is shown f Connect an IRIG B 1 1 Modulated Serial Time Code input to rear panel BNC connector J8 the Code Input BNC g The adjustment potentiometers R96 R97 and R88 are located near U40 Adjust R96 labeled RANGE 1 fully Clockwise h Co...

Страница 112: ...A r Connect an IRIG A 1 1 Modulated Serial Time Code input to rear panel BNC connector J8 the Code Input BNC s Connect the Ground lead of the Digital Voltmeter to the COM2 Test Point which is ground t Connect the Positive lead of the Digital Voltmeter to Pin 9 of IC U37 u Adjust Potentiometer R88 labeled FREQA to produce 2 Volts 0 1 Volt at Pin 9 of IC U37 5 5 7 PLL CARRIER FILTER TESTS a Set up t...

Страница 113: ...provided is marked with a two letter prefix DT followed by five digits and then a revision letter Example DT10024A d Carefully remove the existing EPROM in location U21 on the STCG Synchronized Time Code Generator Assembly and install the new one Be careful to observe orientation when installing the new EPROM in the socket e Replace the top cover and install the fifteen screws f Re connect the pow...

Страница 114: ...per side Interconnect to the recorder reproducer Apply power 1 2 SPECIFICATIONS Momentary closures are about 250 milliseconds To provide overlap with forward and reverse RECORD is about 330 milliseconds When FAST and a direction are output the FIRST is about 250 milliseconds and the last is about 330 milliseconds starting simultaneously Timing is altered slightly when modified to operate with Mode...

Страница 115: ... Pulse Positive 5 Stop Pulse Negative 6 Interval DC 7 GND 8 Early N C 9 Early C 10 Early N O 11 Interval N C 12 Interval C 13 Interval N O 14 15 GND 16 17 GND 18 19 GND 20 REAR VIEW OF CARD EDGE CONNECTOR 19 1 20 2 Figure1 See Figure 2 Tape Control Relays for Tape Search Control Relay connections when using the 20138 assembly See Figures 2 Tape Control Relays and Figure 3 Tape Speed Relay connecti...

Страница 116: ...s Option after paragraph heading Using Tape Search Menus The Stop Relay is configured to output a stop closure when power fails and at power up This is a continuous closure even if momentary has been selected It may be overcome by entering the MAN S or AUTO S menu and issuing a STOP command If the unit will be used to control a Model 90 or 97 Tape Transport remove R9 and R15 before the installatio...

Страница 117: ... menu and the mode remains intact If YES is selected the LCD Display will change to the Tape Search Mode Select Menu as shown in Figure 6 Tape Search Mode Select Menu Select Tapesearch Mode SET UP AUTO S MAN S REMOTE Figure 6 Selecting SET UP from this menu by pressing a switch under SET UP will cause the TM7000 LCD Display screen to change to the SET UP Menu shown in Figure 7 Pressing a switch un...

Страница 118: ...under INT results in the Interval Menu Figure 8 being displayed on the LCD Display Interval Menu ST SP 0 1 2 3 4 5 6 7 8 9 CURSOR Figure 8 This menu is used for setting up the Tape Search intervals Up to ten intervals numbered zero through nine may be preset When this menu first appears the cursor is at the interval number in the top left corner The interval may be changed by entering a number zer...

Страница 119: ...r Early closure outputs may be then used to ready external equipment prior to the beginning of an interval The amount of Early Closure Delay ECD is selected by pressing the switch under the desired number of real time seconds The selected delay is indicated by the cursor ECD should be adequate to enable translation before reaching a Start Time so that the beginning of the interval will be recogniz...

Страница 120: ...ct Menu is shown This menu is used to set up parameters unique to the Tape Transport Set Up Transport Menu Set up Transport Params Mom M Cont C SPEED M c COMMAND M c DIR FIRST last Figure 12 The Play Speed command can be selected momentary or continuous by using the switches under SPEED M c M will be in upper case letters when momentary is selected and c will be in upper case letters if continuous...

Страница 121: ... SP STS SCY MULT AUTOREC RCY START STOP Figure 14 This is the Auto Search Operating Menu The Interval Number top left and Start ST and Stop SP times are displayed on the top line Operator controls are displayed on the bottom line Pushing the switch below a command initiates that command The current tape position is automatically considered in determining whether to go forward or reverse when searc...

Страница 122: ...ORD Used in conjunction with a real time code input It is used to initiate forward record at interval Start Time and stop the recorder at interval Stop Time 1 7 5 RCY RECYCLE This is like SCY except at the end of SCY another SCY is begun To stop RCY use the STOP switch 1 7 6 START START is for use following STS 1 7 7 STOP STOP may be used at any time during any cycle to stop the transport Stop sho...

Страница 123: ...d When an interval has not been preset question marks are displayed Do not attempt to search an interval with any question marks present Once entered intervals are retained through power outages FWD and FFWD are used to play and search in the forward direction respectively REV and FREV are used to play and search in the reverse direction respectively REC followed by a direction command FWD or REV ...

Страница 124: ... to select the speed up ratio of the input code using the translator envelope filter select when using tape search select both search and play speeds Selection of the output automatically follows the operating mode so that the time displayed on the PTS LED is output in the parallel word unless a forcing option is used See E1 E2 E3 1 3 SPECIFICATIONS Output drivers are 74HC type TTL compatible Data...

Страница 125: ...validity of time May be used to clock external equipment The pulse may be inverted by installing a jumper between E4 and E5 E5 E6 is provided for storage The pulse rate is selectable from 1pps 100Kpps See Table Three 1 3 5 JUMPERS E1 E2 E3 Placing a jumper from E1 to E2 forces output of generated time Placing a jumper from E2 to E3 forces output of translated time Without a jumper time follows the...

Страница 126: ... 10 UD8 41 hS1 11 UD4 42 mS8 12 UD2 43 mS4 13 UD1 44 mS2 14 TH2 45 mS1 15 TH1 46 tmS8 16 UH8 47 tmS4 17 UH4 48 tmS2 18 UH2 49 tmS1 19 UH1 50 hmS8 20 TM4 51 hmS4 21 TM2 52 hmS2 22 TM1 53 hmS1 23 UM8 54 SAMPLE 24 UM4 55 N C 25 UM2 56 N C 26 UM1 57 N C 27 TS4 58 N C 28 TS2 59 FRZ 29 TS1 60 ENOUT 30 US8 61 GND 31 US4 62 GND Symmetricom Inc TM7000 TymMachine TCG T Rev D A 13 ...

Страница 127: ...e major differences between the two configurations are their rules and pin assignments DTE is designated as the initiator of the commands DCE is designated as the responder to the commands This module is capable of three different output configurations RS 232 DCE Configuration see Figure One RS 232 DTE Configuration see Figure Two RS 422 DCE Configuration see Figure Three Notice that the following...

Страница 128: ... active If CTS goes inactive while a time message output is in progress the time message output will be paused until CTS returns to active at which time the time message will resume A partial message can be cleared by setting DSR inactive 1 4 MODE OF OPERATION There are two modes of operation possible with this module Synchronous burst and asynchronous demand response The synchronous mode provides...

Страница 129: ...ll be an ASCII character as detailed in Table One and One A The last two bytes are always CR and LF The preamble byte and the two quality bytes are optional This format is simple to process since all characters are ASCII but each digit requires a full byte The BCD format packs two digits into each byte as shown in Tables Two and Two A The preamble postamble and quality byte are optional This forma...

Страница 130: ...message format 1 5 7 POSTAMBLE The postamble is automatically inserted into the ASCII format It is optional in the BCD format The postamble comprises hex 0D hex 10 ASCII CR LF at the end of the message 1 5 8 QUALITY INDICATOR The quality indicator can be enabled in either ASCII or BCD format In the BCD format a binary one in bit position one indicates an error in the input time code while a binary...

Страница 131: ...in Assignments See Figures One Two and Three 1 8 1 RS 232 Input Impedance 3 7KΩ Input Voltage Range 25V maximum 0 5V minimum Output Voltage Between 5V to 15V into a load of 3 7KΩ 1 9 MAINTENANCE No routine maintenance is required 1 10 SETUP CHECKLIST Please see the next page 1 10 1 TERMINAL SELECT AND HANDSHAKE SELECT Box Pin Jumpers J3 DCE With Full Handshake 1 A and B through 6 A and B A B C 1 2...

Страница 132: ...shake 1 B and C through 6 B and C A B C 1 2 3 4 5 6 J3 DTE Full Handshake DCE with No Handshake 1 A and B 2 A and B 3 and 4 C 5 and 6 C A B C 1 2 3 4 5 6 J3 DCE No Handshake Factory Default Symmetricom Inc TM7000 TymMachine TCG T Rev D A 19 ...

Страница 133: ...1 2 3 1 2 3 1 2 3 Time Select Automatic Factory Default Time Select Generator Time Select Translator J2 J2 J2 1 11 MODE OF OPERATION Asynchronous SW4 1 ON Synchronous SW4 1 OFF Asynchronous Mode Character Selection SW3 1 through SW3 8 1 MSB 8 LSB ON 0 OFF 1 Mandatory Switch Setting SW4 3 ON A 20 TM7000 TymMachine TCG T Rev D Symmetricom Inc ...

Страница 134: ...11 5 BAUD RATE 50 SW2 1 ON SW2 2 ON SW2 3 ON SW2 4 ON 75 SW2 1 ON SW2 2 ON SW2 3 ON SW2 4 OFF 110 SW2 1 ON SW2 2 ON SW2 3 OFF SW2 4 ON 134 5 SW2 1 ON SW2 2 ON SW2 3 OFF SW2 4 OFF 150 SW2 1 ON SW2 2 OFF SW2 3 ON SW2 4 ON 200 SW2 1 ON SW2 2 OFF SW2 3 ON SW2 4 OFF 300 SW2 1 ON SW2 2 OFF SW2 3 OFF SW2 4 ON 600 SW2 1 ON SW2 2 OFF SW2 3 OFF SW2 4 OFF 1200 SW2 1 OFF SW2 2 ON SW2 3 ON SW2 4 ON 1800 SW2 1 ...

Страница 135: ... 2 SW2 5 OFF SW2 6 OFF 1 11 7 PARITY None SW2 7 ON SW2 8 ON Odd SW2 7 ON SW2 8 OFF Even SW2 7 OFF SW2 8 ON None SW2 7 OFF SW2 8 OFF 1 11 8 PREAMBLE Preamble SW1 6 ON None SW1 6 OFF 1 11 9 QUALITY INDICATOR Quality On SW1 7 ON None SW1 7 OFF A 22 TM7000 TymMachine TCG T Rev D Symmetricom Inc ...

Страница 136: ...ity 2 Word 16 CR Optional Error Word 17 LF 7 6 5 4 3 2 1 0 0 0 0 0 0 0 1 0 Optional 0 0 1 1 HD 8 4 2 1 0 0 1 1 TD 8 4 2 1 0 0 1 1 UD 8 4 2 1 0 0 1 1 tS 8 4 2 1 0 0 1 1 hS 8 4 2 1 0 0 1 1 mS 8 4 2 1 0 0 1 1 UM 8 4 2 1 0 0 1 1 TS 4 2 1 0 0 1 1 US 8 4 2 1 0 0 1 1 0 0 1 1 8 4 2 1 0 0 1 1 4 2 1 0 0 TH 2 1 UH TM 0 0 1 0 0 1 1 0 0 0 0 0 0 1 0 1 0 0 0 0 0 1 1 0 1 0 1 0 0 0 1 0 1 Symmetricom Inc TM7000 Tym...

Страница 137: ... 2 Word 3 Word 4 0 0 Word 5 Word 6 Word 7 0 0 1 1 TM 4 2 1 0 0 0 1 1 UD 8 4 2 1 0 0 1 1 UM 8 4 2 1 0 0 1 1 TS 4 2 1 0 Word 8 Word 9 Word 10 Word 11 Word 12 Word 13 30H Word 14 CR Word 15 LF 0 0 1 1 US 8 4 2 1 0 0 1 1 tS 8 4 2 1 0 0 1 1 hS 8 4 2 1 0 0 1 1 mS 8 4 2 1 0 0 1 1 0 0 0 0 0 0 0 0 1 1 0 1 0 0 1 1 1 0 1 0 A 24 TM7000 TymMachine TCG T Rev D Symmetricom Inc ...

Страница 138: ... 8 Word 9 Quality Word 10 Postamble tS 8 4 2 1 mS 8 4 2 1 0 0 TH 2 1 0 4 2 1 0 TM TS 4 2 1 0 0 0 0 0 0 0 0 0 0 L E 1 1 0 1 1 0 1 0 Optional Optional Table Two A BCD Format Time Word Output No Options 7 6 5 4 3 2 1 0 0 0 0 0 Word 1 Word 2 Word 3 Word 4 Word 5 Word 6 Word 7 HD 8 4 2 1 UM 8 4 2 1 4 2 1 UH 8 4 2 1 TD 8 4 2 1 US 8 4 2 1 4 2 1 hS 8 4 2 1 tS 8 4 2 1 mS 8 4 2 1 UH 8 4 2 1 0 0 TH 2 1 0 TM ...

Страница 139: ...TS 5 CTS 6 DSR 7 GROUND 8 Not Used 9 MATCH 10 Not Used 11 5VB 12 Not Used 13 Not Used 14 Not Used 15 Not Used 16 Not Used 17 Not Used 18 Not Used 19 Not Used 20 DTR 21 Not Used 22 Not Used 23 Not Used 24 Not Used 25 Not Used A 26 TM7000 TymMachine TCG T Rev D Symmetricom Inc ...

Страница 140: ... 4 CTS 5 RTS 6 DTR 7 GROUND 8 Not Used 9 MATCH 10 Not Used 11 5VB 12 Not Used 13 Not Used 14 Not Used 15 Not Used 16 Not Used 17 Not Used 18 Not Used 19 Not Used 20 DSR 21 Not Used 22 Not Used 23 Not Used 24 Not Used 25 Not Used Symmetricom Inc TM7000 TymMachine TCG T Rev D A 27 ...

Страница 141: ...Hz 19393 6 IRIG H 1 kHz 19393 7 IRIG G 19393 8 XR3 250 Hz 19393 9 2137 1 kHz 19393 10 NASA 36 19393 11 1892 19393 12 NASA 28 19393 13 IRIG C 100 Hz 1 1 INSTALLATION This assembly may be plugged into any available option position Remove power from the TM7000 Plug this assembly into the PTS being careful that components are on the top side Interconnect the modulated output J1 and DC LEVEL SHIFT outp...

Страница 142: ...rving the modulated output J1 on an oscilloscope adjust R15 for the desired ratio The standard modulation ratio for IRIG time codes is 3 1 Levels While observing the modulated output J1 on an oscilloscope adjust R16 for the desired level The standard amplitude for most applications is 3 V p p modulated carrier which is approximately 1 V RMS R21 R18 R19 R20 C11 R17 Q1 C10 R15 R16 R14 J1 J2 TP2 TP1 ...

Страница 143: ...ll switches down nor a value that is greater than C hex 12 1 2 OPERATION The RE GENERATE menu on the SELECT GENERATOR OUTPUTS menu is used to select the output code for each channel regardless of whether the time source for the code is the generator or the translator Channels are selected using the NEXT button under the LCD menu display Only installed channel numbers are displayed Multiple encoder...

Страница 144: ...The Multi Code Serial Encoder may set time information from either the Generator or Translator according to which mode has been selected Or it may be forced by a jumper to output either translator time or generator time regardless of the mode of the PTS Placing a jumper from E2 to E3 forces Translator time output Placing a jumper from E2 to E1 forces the output of Generator time This assembly is s...

Страница 145: ...G NASA 36 XR3 2137 ANG Notes 1 N is the current Encoder channel Advance with the NEXT button 2 Select the desired output code with a button directly under the menu item 3 Only installed channels are displayed SPEED UP Select Desired Generator Speed up X1 X2 X4 X8 X16 X32 X64 A 32 TM7000 TymMachine TCG T Rev D Symmetricom Inc ...

Страница 146: ...gure 1 1 2 3 4 E3 E2 E1 J1 J2 S1 1 2 4 8 R15 R17 DC Code Output AC Code Output Output Level Adjust Mod Ratio Adjust Channel Selector ON OFF Shown with Channel C 12 Selected Symmetricom Inc TM7000 TymMachine TCG T Rev D A 33 ...

Страница 147: ...ear J8 Remove power from the TM7000 Plug this assembly into any unused option slot being careful that components are facing upward Connect the DC code in to J3 of this assembly to the Code Input J8 of the basic unit using the coaxial cable supplied Apply power 1 3 SPECIFICATIONS DC Code Input Impedance 8K Ohms Input Level 1V to 50Vpeak positive negative or bi polar Polarity NORM INV is selected by...

Страница 148: ...f NO is selected the previous menu and mode remains intact Set Up Translator Menu Set up Translator CODE AC dc SLOW CODE Figure 3 Select DC code by depressing the switch directly below DC The selected code will be in upper case letters When DC is in upper case letters AC code translation is inhibited When DC is in uppercase letters translation of DC code is enabled Pressing the PREV switch will re...

Страница 149: ...de has been selected pressing the NEXT switch will cause the Translating Menu Figure 8 to be displayed on the LCD Display If there is not a blinking cursor on this menu no IRIG code has been selected If it is desired to see what input code has been selected press the NEXT switch and the Translating Menu Figure 8 will appear on the LCD Display showing the selected Translator code selected in the up...

Страница 150: ...ode Selecting the correct code is accomplished by pressing the switch beneath the desired code When the new code selection is made the LCD Display will change to that shown in Figure 8 with the selected code being translated shown in the upper right hand corner of the display Selection of 28 1 corresponds to NASA 28 with a carrier frequency of 100 Hz Selection of 28K corresponds to NASA 28 with a ...

Страница 151: ...ng translated and the rate real time versus speed up This can cause a peculiar appearance of the time display If for example the seconds update ten times as fast as the display they would not appear to change Changing the code speed slightly could cause the seconds display to increment or even decrement at a slow rate This phenomenon only occurs at rates much faster than real time Pressing NEXT or...

Страница 152: ... expected When NEXT is pressed while the Select Filters Display is shown on the LCD Display it will change to the Play Search Speed Menu as shown in Figure 10 Note that either or both the Envelope Filter or the Carrier Filter have to be selected IN to get this menu For this option to operate correctly the ratio of playback speed to real time must be entered PB RT using the Play Search Speed Menu T...

Страница 153: ...hould be selected IN and the carrier filter should be selected OUT IN R2 R6 R7 J2 J1 J3 DC CODE INPUT AC CODE INPUT DC CODE OUT To Translator J2 THRESHOLD ADJ Figure 12 INPUT OUTPUT AND ADJUSTMENT LOCATION A 40 TM7000 TymMachine TCG T Rev D Symmetricom Inc ...

Страница 154: ...code word Index markers complete the time frame after the time of year word has been read The amplitude and pulse widths of the time frame information are as follows AMPLITUDE Binary 1 5V DC nominal Binary 2 2V DC nominal PULSE WIDTH Reference Marker 100 of bit interval Binary 1 50 of bit interval Binary 0 20 of bit interval 1 2 INSTALLATION This assembly may be plugged into any available option p...

Страница 155: ...od Seconds 1 5 10 30 60 300 600 1800 3600 1 4 SPECIFICATIONS SLOW CODE OUTPUT Format Symmetricom Slow Code Level Adjustable 0 5V peak Impedance Capable of driving a C MOS load a TTL load or a 1K Resistive load Modulation Ratio Nominally 5 2 ADJUSTMENTS Level While observing the modulated output J1 on an oscilloscope adjust R4 for the desired level Figure 1 Slow Code Output Level Adjustment Slow Co...

Страница 156: ... 20 40 1 2 4 8 10 20 40 80 100 200400800 1 2 4 8 10 20 0 1 2 Frame Period 4 5 Frame Period 1 2 3 3 4 5 6 C O D E 1 2 3 4 5 Pulse Rate Frame Period Binary Zero Binary One Frame Ref Pulse 50 PPS 10 PPS 5 PPS 1 PPS 1 P 10s 1 Sec 5 Sec 10 Sec 60 Sec 10 Min 4 mS 20 mS 40 mS 200 mS 2 Sec 10 mS 50 mS 100 mS 500 mS 5 Sec 20 mS 100 mS 200 mS 1 Sec 10 Sec Symmetricom Inc TM7000 TymMachine TCG T Rev D A 43 ...

Страница 157: ...formation will appear in a human readable format superimposed over a portion of the video signal On board controls allow vernier positioning of the inserted characters in both the vertical and horizontal axes control of aspect ratio character height and width insertion or deletion of a shaded mask around the inserted characters progressive deletion one digit at a time of sub seconds information de...

Страница 158: ...e following paragraph and CAUTION note The inserter will accept a variety of 2 1 interlaced video formats having a number of vertical interval timing wave forms refer to the Specifications paragraph When operating with NTSC EIA Specification RS170 CCIR PAL EIA Specification RS330 broadcast format or EIA Specifications RS343 875 line broadcast format time data storage may be made at either the fiel...

Страница 159: ... jitter free performance it will be necessary to feel the thresholds on either side of the desired position and set the positioning control approximately equidistant from each threshold Excessive clockwise operation may adversely affect circuit operation 1 3 2 HORIZONTAL POSITION POTENTIOMETER R24 Used to position the inserted characters horizontally in the video output Clockwise operation moves t...

Страница 160: ...Fractional Seconds S1 1 S1 2 tS hS mS CLOSED CLOSED tS hS OPEN CLOSED tS CLOSED OPEN NONE OPEN OPEN 1 3 7 S1 3 DAYS INSERTION CONTROL Used to control insertion of days data into the video output When S1 3 is closed days data is deleted from the video output To enable days data open S1 3 1 3 8 S2 1 TIME DATA CONTROL Used to control the insertion of the time to the video output When S2 1 is closed t...

Страница 161: ... 1 for E point location CAUTION Only one jumper should be installed or TM7000 operation will be impaired To revert to the as shipped configuration remove and discard the jumper 1 3 13 875 LINE SELECTION To use the 875 Line video format solder an insulated bus wire jumper not supplied between the 875 Line Select E points E4 and E5 Refer to Figure One for E point location Adjust R24 horizontal posit...

Страница 162: ...dered on a case by case basis Testing of this circuit has been performed using a limited number of non interlaced formats The Assembly 20125 2 will accept a 525 line Y C separated luminance and chrominance signals Input Level is One volt 10 peak to peak into a load of 75Ω 10 to ground Through put frequency response is within 3 dB from 25 Hertz to 10 Megahertz The input is terminated with 75Ω 10 to...

Страница 163: ...APPENDIX A Figure One A 50 TM7000 TymMachine TCG T Rev D Symmetricom Inc ...

Страница 164: ...e components on the top side Be sure inputs J1 J5 and J9 if applicable are connected before plugging the assembly in Power up the unit 1 2 OPERATION There are no operator adjustments for this option 1 3 SPECIFICATIONS Table One Input Output Level Load Frequency Detail Input J1 Level Up to 1 5 VRMs Load Greater than 100KΩ Frequency DC to 1 2 MHz Outputs J2 J3 and J4 Level Dependent on input Load 60...

Страница 165: ...UT Using Jumpers E1 E2 E3 and E4 allows the user to use one input and set multiple outputs Table Two Input Jumper Outputs J1 None J2 J3 J4 J5 None J6 J7 J8 J9 None J10 J11 J12 J1 or J5 E1 to E2 J2 J3 J4 J6 J7 J8 J5 or J9 E3 to E4 J6 J7 J8 J10 J11 J12 J1 J5 or J9 E1 to E2 and E3 to E4 All Outputs Figure One E4 E3 E2 E1 J12 J11 J10 J8 J7 J6 J4 J3 J2 J1 J5 J9 Input 3 Input 2 Input 1 Output 3 Output 2...

Страница 166: ...cable are connected before plugging assembly in Power up the unit 1 2 OPERATION There are no operator adjustments for this option 1 3 SPECIFICATIONS Table Three Input Output Level Load Frequency Detail Input J1 Level Up to 1 5 VRMs Load Greater than 100KΩ Frequency DC to 1 2 MHz Outputs J2 J3 and J4 Level Dependent on input Load 50Ω or greater Frequency Same as J1 Input Input J5 Level Up to 1 5 VR...

Страница 167: ...Outputs J1 None J2 J3 J4 J5 None J6 J7 J8 J9 None J10 J11 J12 J1 or J5 E1 to E2 J2 J3 J4 J6 J7 J8 J5 or J9 E3 to E4 J6 J7 J8 J10 J11 J12 J1 J5 or J9 E1 to E2 and E3 to E4 All Outputs Input Output Diagram E4 E3 E2 E1 J12 J11 J10 J8 J7 J6 J4 J3 J2 J1 J5 J9 Input 3 Input 2 Input 1 Output 3 Output 2 Output 1 A 54 TM7000 TymMachine TCG T Rev D Symmetricom Inc ...

Страница 168: ...3188 000 051 424 3188 0000 Quantity Required Quantity Required 3 9 RECOMMENDED CABLES Cable Usage Table 50Ω RG 174 U RG 188 U RG 316 U 70Ω RG 161 U 75Ω RG 179 U RG 187 U RECOMMENDED CRIMPING TOOL Sealectro Corporation 50 000 0090 or 50 000 0091 Symmetricom Inc TM7000 TymMachine TCG T Rev D A 55 ...

Страница 169: ...s via Twinax connectors TM Option 45C 1 1 GENERAL DESCRIPTION This assembly can be built in three configurations and then jumpered to function as a buffer or pulse generator Regardless of the configuration to have this assembly function as a one input three output buffer install a jumper plug between JP1 2 and JP2 2 as shown in Figure One To configure this assembly as a pulse rate generator jumper...

Страница 170: ... using DIP switch SW1 as shown in Table One below Table One SW1 Switch Position Pulse Rate 1 2 3 4 X X X X 1mpps X X X 500kpps X X X 100kpps X X 50kpps X X X 20kpps X X 5kpps X X 2kpps X 500pps X X X 200pps X X 100pps X X 50pps X 20pps X X 10pps X 5pps X 1pps 1ppm 10kpps is generated in lieu of 20kpps if 21057 1 Assembly is used X Closed on Symmetricom Inc TM7000 TymMachine TCG T Rev D A 57 ...

Страница 171: ...usoidal input the transformer coupled outputs have a flat frequency response from approx 100Hz to 250Khz when terminated into a 75Ω resistive load With a four volt peak to peak sinusoidal input the transformer coupled outputs have a flat frequency response from approx 350Hz to 230Khz when terminated into a 75Ω resistive load This assembly is not intended to be used with pulse rates The suggested m...

Страница 172: ...057 2 must be installed in a bottom slot because of the height of the transformers Table Two Jumper Configuration JP1 JP2 JP3 JP4 Buffer Assembly JP1 2 to JP2 2 Not Used Pulse Rate Assembly JP1 1 to JP2 1 JP3 1 to JP4 1 Pulse Rate Assembly 10us Out JP1 1 to JP2 1 JP3 2 to JP4 2 Symmetricom Inc TM7000 TymMachine TCG T Rev D A 59 ...

Страница 173: ...FER MODULE PULSE RATE S N PART NO 172487 ASSY NO 21057 P1 R10 R11 R9 4 3 2 1 R12 T1 T2 T3 C30 R18 R20 C31 U21 R19 E2 E1 C28 R15 R17 C29 U20 R16 E4 E3 R8 R6 C22 C16 U14 R7 E6 E5 R5 R1 R2 R3 C9 C7 U7 JP1 JP2 1 2 3 4 J1 J2 J3 J4 SW1 6 4 1 2 3 4 JP4 JP3 C21 4 40 x 5 16 Pin Head Screw 4011 Far Side A1 4 Split Washer 4048 4 Flat Washer 4049 4 Nut 4053 6 Near Side 21057 Basic Assembly A 60 TM7000 TymMach...

Страница 174: ... symmetricom com www symmetricom com For more information about the complete range of Quality Timing Products from the Symmetricom group of companies call 1 800 544 0233 in the US and Canada Or visit our site on the world wide web at http www Symmetricom com for continuously updated product specifications news and information ...

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