Racal Instruments 9902 User Manual Download

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Summary of Contents for 9902

Page 1: ......

Page 2: ...902 and 9906 RACAL DANA INSTRUMENTS LIMITED Duke Street Windsor Berks England Tel Windsor 6981 1 Telex 847013 Prepared by Group Technical Handbooks Racal Group Services Limited The Electronics Group R...

Page 3: ...Universal Counter Timers 9902 and 9906...

Page 4: ...REQUENCY STANDARD 1 3 CARRYING HANDLE 1 3 MAINTENANCE 1 3 CHAPTER 2 PREPARATION FOR USE AC SUPPLY VOLTAGE SELECTION 2 1 POWER FUSE 2 4 LINE CORD 2 4 SELF CHECK 2 4 CONNECTION OF EXTERNAL FREQUENCY STA...

Page 5: ...ouble Line Time Interval Single and Double Line Time Interval Averaging Totalizing 9906 Frequency Manual Single and Multiple Period Single and Multiple Ratio Single and Double Line Time Interval Singl...

Page 6: ...r m s up to 8MHz decreasing to 60V r m s at lOMHz 9906 lOOV r m s up to IMHz decreasing to 36V r m s at lOMHz Maximum Input Level The d c level peak signal level must not exceed 1 OOV 9902 or 200V 99...

Page 7: ...m s ac input with 40 dB S N ratio Bandwidth Automatically reduced to 10 MHz 3 dB when on AC with Period selected 6 TIME INTERVAL SINGLE AND DOUBLE LINE Input channel Single Line Channel B Double Line...

Page 8: ...r to Options 04A 04B and 04C on page Tech Spec 9 Normally 04C will be fitted Frequency standard output 1 MHz rectangular waveform at rear panel BNC socket When using internal standard the output level...

Page 9: ...d over a minimum of 10 days after 3 months continuous operation Warm up Time Better than 2 parts in 10 within 6 minutes Temperafure stability Better than 3 parts in 10 per C averaged over the range 10...

Page 10: ...Connectors FUNCTION AND TIMEBASE LOGIC CODES Function Data Function information format 3 lines coded as follows The table gives the logic available at the edge connector The inverse levels are applied...

Page 11: ...ay information V 9 Overflow for 10 10 10 and 10 digits on pins D E 4 and 5 respectively 10 Decimal point position in kHz units plus overflow information for 10 digit via pin 5 ID KHi SYNC PIN FI 1 1 1...

Page 12: ...o consult the handbook for further details CHECK FACILITIES 1 MHz Readout 1 3 When CHECK mode is selected the 1 MHz internal reference signal is fed through the instrument to provide an operational ch...

Page 13: ...instrument is set Six pairs of voltage ranges are obtainable by appropriate arrangement of a link and tappings on the transformer tag board A two position slide switch on the rear panel enables the u...

Page 14: ...V M 188 212V SWITCH TO A 1 200 225viSWITCH TO 0 Line Voltage Selection i CONTINUED ON FIG 3b 9902 9906 Vol 1 SWITCH L N 200 225V SWITCH TO A 212 238V SWITCH TO B l L 1 I 1 C H 1 0 100 112 A 0 0 O SWI...

Page 15: ...9902 9906 9902 9906 1 1 ms 001000 00001000 000001 As 9902 but 10 10 ms 01000 0 0001000 0 00001 0 two additional 10 100 ms 1000 00 001000 00 0001 00 O s at left 10 1 sec 000 000 01000 000 001 000 hand...

Page 16: ...re Supply Fig 4 9902 9906 Vol 1 2 6 FITTING RACK MOUNTING KIT OPTION TYPE 11 1 126 2 11 1 Remove the bench type handle assembly by carefully prising off the plastic caps from the handle pivots and the...

Page 17: ...9902 9906 Vol 1 3 1 Function Push Button Switch Bank Cont d 9906 VHF and HF Modes The AUTO manual facility is not fitted Instead these switches are marked VHF and HF and serve as frequency range sele...

Page 18: ...he frequency is less than 10 MHz 9902 9906 Vol l 3 3 CHECIVOPERAT HOLD Switch OPERATE is normal setting CHECK provides a 1 MHz readout of the internal reference frequency on Frequency and Period for s...

Page 19: ...acent to the switch shows the voltage range selected 9902 9906 Vol 1 3 5 POWER SUPPLY CHAPTER 4 0_P_E_R_A T l_N G_ J N_S_T_R_U C T I 0_N S 4 1 Before operating a new Instrument or at a new location ch...

Page 20: ...interval may be controlled by successive events on a single line such as pulse widths in which case Input B is used with the B B A switch set to B B 4 6 For timing events on separate lines the B B A s...

Page 21: ...6 If on HOLD press the RESET button for a new reading 7 To obtain the true ratio the displayed reading must be divided by the factor n indicated above the selected Timebase button TOTALIZE n 4 1 1 In...

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