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Instruction Manual

Model 1856D 3.7GHz Frequency Counter

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Summary of Contents for 1856D

Page 1: ...1 Instruction Manual Model 1856D 3 7GHz Frequency Counter...

Page 2: ...ovided by our service center or sales outlet free of charge We charge customers for repairs after the one year warranty period has expired We charge for repairs regardless of the warranty period if fa...

Page 3: ...sion com Safety Summary Please take a moment to read these operating instructions thoroughly and completely before operating this instrument Pay particular attention to WARNINGS concerning conditions...

Page 4: ...11 3 OPERATION 3 1 Controls Indicators and Connectors 11 3 2 Operating Instructions 14 3 3 Frequency Measurements 14 3 4 Period Measurements 16 3 5 Total Measurements 16 3 6 RPM Measurements 16 3 7 Us...

Page 5: ...olutions Per Minute Measuring Function l External Frequency Standard Input with 9 Digit LED Display l Attenuator l Period l Total l Low Pass Filter l Line Filter Also provided is a self test function...

Page 6: ...Display Digits 5 6 6 7 7 8 8 9 Frequency Input A RESOLUTION 0 1 Hz 0 99 Hz 10 uHz 1 uHz 1 uHz 0 1 uHz 0 1 uHz 10nHz 10nHz 1nHz 1 Hz 9 9 Hz 0 1mHz 10 uHz 10 uHz 1 uHz 1 uHz 0 1 uHz 0 1 uHz 10nHz 10 Hz...

Page 7: ...to 600 x 106 RPM OVER FLOW OF g INPUT C CHARACTERISTICS h FREQUENCY RANGE 80 MHz to 3 5 GHz h SENSITIVITY 15mV from 80 MHz to 2000 MHz 20mV from 2000 MHz to 3 0 GHz 30mV from 3 0GHz to 3 2GHz 50mV fr...

Page 8: ...age variation h TEMPERATURE STABILITY 5 PPM from 0 C to 50 C h MAX AGING RATE 5 PPM year h INT STD OUT 10 MHz Internal Standard Frequency Output LEVEL 1 V p p or more TTL 10TTL CAPACITANCE 15pF h EXT...

Page 9: ...Equipment Ratings l Power 115VAC 10 50 60 Hz 9 W l Plug and Socket 3 wire ac power plug and 3 wire outlet l Fuse 500 mA 250V F type l Operating Environment TEMPERATURE 0 C to 40 C Accuracy Specified...

Page 10: ...ugh a 3 conductor AC power cable to be plugged into a three contact electrical outlet to secure grounding If adapted into a 2 conductor cable use the ground terminal on the rear panel for grounding th...

Page 11: ...F UNCT I ON 19 18 15 16 10 12 9 2 3 1 4 5 6 14 8 G A T ET I M E M UL T I P L I E R H OLD TOTALR E SE T OF F L P F I NP UTA COUP L E AC AT T 1 1 ON DC 1 1 0 20 50 FIG 2 FRONT PANEL GATE INDICATOR The g...

Page 12: ...ect on the C input COUPLE SWITCH This switch is used to select the input coupling mode AC or DC INPUT A Use this input for frequency measurements below 100 MHz and all period measurements Female BNC c...

Page 13: ...R VI CI NG T O DI SCONNE CTP OW E RSUP P LYBEFOREREP L ACI NG F USE 1 I NTST D OUT QUAL I F I E D P E RSONNE L E XTST D I N TOP REVENTE L E CTRI C SHOCK H A Z ARD AND F I R E RS 232C W A RNI NG 6 5 2...

Page 14: ...R THAN THE LIMITS LISTED IN THE SPECIFICATIONS SECTION MAY DAMAGE THE COUNTER BEFORE APPLYING ANY SIGNAL TO THE INPUTS MAKE CERTAIN THAT IT DOES NOT EXCEED THESE SPECIFIED MAXIMUMS 2 FREQUENCY COUNTER...

Page 15: ...y minimizing effects of high frequency noise that may accompany the signal h When making measurements near the lower cut off frequency of input A 10 Hz or less use DC coupling Push in the DC COUPLING...

Page 16: ...ignal to be measured at input A The accumulated counts will be displayed continuously to a maximum count of 999999999 If this is exceeded the overflow message OF will be displayed c The ATTENUATOR LPF...

Page 17: ...0BPS 1 start bit 0 8 data bit 1 stop bit 1 NONE PARITY 2 To Frequency counter Command Parameter Terminate Code H HOLD 0 OFF 1 ON 2 TOGGLE CR 0DH G GATE 0 0 01 SEC 1 0 1 SEC 2 1 SEC 3 10 SEC CR 0DH D D...

Page 18: ...ive power source b Unscrew the fuse holder with a screwdriver c Remove the defective fuse d Install a new fuse of the SAME SIZE AND RATING e Screw the fuse holder back in CAUTION REPLACEMENT FUSES MUS...

Page 19: ...y keeping cable lengths short or eliminated by providing a proper termination RG58 cable for example has a characteristic impedance of 50 The proper termination for this cable would therefore be a 50...

Page 20: ...the LOW PASS FILTER the ATTENUATOR and or the 10 1 probe is recommended WARNING USE CAUTION WHEN MEASURING THE LINE FREQUENCY OF AN AC OUTLET USE THE PROBE TIP ONLY AND MEASURE BOTH SIDES OF THE LINE...

Page 21: ...arranty card to B K Precision Corp 22820 Savi Ranch Parkway Yorba Linda CA 92887 within fifteen 15 days from proof of purchase Exclusions This warranty does not apply in the event of misuse or abuse o...

Page 22: ...device Customers not on open account must include payment in the form of a money order or credit card For the most current repair charges contact the factory before shipping the product Return all mer...

Page 23: ...23 22820 Savi Ranch Parkway Yorba Linda CA 92887 USA TEL 714 921 9095 FAX 714 921 6422 PN 481 532 9 001 Printed in Korea...

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