Leader Electronics Corp. LDC-823A Instruction Manual Download | Manualshive

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MODE L

L DC

-

823A

DIGITAL COUNTER

INSTRUCTION MANUAL

LEADER ELECTRONICS CORP.

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Summary of Contents for LDC-823A

Page 1: ...MODE L L DC 823A DIGITAL COUNTER INSTRUCTION MANUAL LEADER ELECTRONICS CORP...

Page 2: ...period of ewing Readout miscounts are reduced by zero blanking unit display kHz MHz mS and ove ange display The use of LSI and MSI in the internal circuit assures reliable performance and less over c...

Page 3: ...ment fluorescent display overflow indication gate indication and zero blanking O C _ 40 C 32 F l04 F lOOV 117V 200V 234V 10 50Hz 60Hz Voltage change is accomplished by change on tap of trans former Ap...

Page 4: ...he multiplier factors Each range is as follows GATE TIME MULTI RESET Switch 0 1 1 and 10 sec X 10 X 100 and X 1000 By pressing this switch the counter stops its operation When released the display is...

Page 5: ...t the indicator shows MHz at 2S0MHz Freq Range and kHz at 80MHz Freq Range mS is displayed in the case of period measurements Display It is a 8 digit 7 segment fluorescent display In accordance with t...

Page 6: ...AC power source of LDC 823A at 50 60Hz within 10 of rating voltage Caution Excessively large or small AC voltages may induce erroneous operation 3 In replacing the fuse use the designated 0 3A fuse 4...

Page 7: ...voltage of the DC component of the input signal is 100Y DC When the input signal is not a continuous sine wave or is modulated the following values are the maXU11um allowable AC input voltages permitt...

Page 8: ...sensitivity of LDC 823A is approx 15 mVrms so it might be pos sible to mis attribute even if the noise voltage of about 45mVp p is present Attention should be paid specially when spike like noise fro...

Page 9: ...being 50 Also when the duty ratio becomes below 10 the measurement may not be able to be done even when input voltage is increased This is due to the noise present and the lower limit will be about 10...

Page 10: ...O lS Frequency Period MULTI Display 10Hz 100Hz lOOmS 10mS X10 100 0OmS lO OOmS 100Hz 1kHz 10mS 1mS X100 10 000mS 1 000mS 1kHz 10kHz lmS O lmS X1000 1 0000mS 0 1000mS Table 4 6 1 When the measuring tim...

Page 11: ...ALAR 2SDMHZ 10 S H ApER GAT E FP E J FLUORESCENT DISPLAY e DIGIT OVERFLOw UNIT DISPLAY DRivER COUN TER LATCH L __ __ __ _ l T IME BASE SELECTOR PER I 00 J 0 r 1 YtD OOKH l O O K H L _ _ _ _ II 0 I HL...

Page 12: ...splays 10MHz If you read other than 10MHz adjust the trimmer capacitor with the screw driver through the hole for adjustment provided at the rear panel of the LDC 823A in order to make exact accurate...

Page 13: ...R 166 IKn r R C 7 r T 5V IK l R168 2 2K Q 105 W 5 SC HEMATI C c 2 5 Moae I LDC 8 234 DISPLAY COUNTER U I II I T T 0 1073 LEADER ELECTRONICS CORP T r...

Page 14: ...M 0 SIGNAL I O lS IC9 C O O OI JF J 1 LS02 I D I _ II _ ______ _ __ ____ ______ ____ _ ______ ____ __ __ lJiQ 11 L _ ____ __ ____ ______ ____ __ __ __ __ ____ __ __ __ R15 loon SCHEMATIC t if I llHhl...

Page 15: ...j l n Q403 250235 0 12v X301 10MHZ D 11 2 302 33PF 68KCl 1 I 2i C30S mloop tj 6 R406 47 7 ______________ __ ____________ ______________________ ____ __ __________ ________ ____________ L ___ _ __ _ __...

Page 16: ...ORP 2 6 33 TSUNASHIMA HIGASHI KOHOKU KU YOKOHAMA JAPAN PHONE 045 541 2121 TELEX J47780 JPLEADER LEADER INSTRUMENTS CORP 3800SER AVENUE HAUPPAUGE N Y 11788 U S A PHONE 516 231 6900 TELEX 510 227 9669 L...

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