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  FREQUENCY COUNTER

USER MANUAL

CONTENTS PAGE
1.

PRODUCT INTRODUCTION.............................................

  1

2.

TECHNICAL SPECIFICATION…………………………...

  2

3.

PRECAUTIONS BEFORE OPERATION…….…………...
3-1.Unpacking the Instrument………………….…………...
3-2.Checking the Line Voltage…………………..………….
3-3.Equipment Installation and Operation………………...

  4
  4
  4
  5

4.

PANEL INTRODUCTION……………………..……………

  6

   

5.

APPLICATION……………………………………………….

 9

6.

MAINTENANCE……………………………………………..
6-1.Standard Method for Calibration………………………
6-2.Cleaning…………………………………………………...

11
11
12

  FREQUENCY COUNTER

USER MANUAL

1

1. PRODUCT INTRODUCTION

The intelligent counters are measuring frequency and period from

the range of 0.01Hz to 120MHz on channel A, and 50MHz to

1.3(2.7)GHz on channel B.

The products also provide special features of high resolution and

sensitivity for value reading expediency.

Summary of Contents for GFC-8131H

Page 1: ...n 4 4 4 5 4 PANEL INTRODUCTION 6 5 APPLICATION 9 6 MAINTENANCE 6 1 Standard Method for Calibration 6 2 Cleaning 11 11 12 FREQUENCY COUNTER USER MANUAL 1 1 PRODUCT INTRODUCTION The intelligent counters are measuring frequency and period from the range of 0 01Hz to 120MHz on channel A and 50MHz to 1 3 2 7 GHz on channel B The products also provide special features of high resolution and sensitivity ...

Page 2: ... 700MHz 15mVrms Max to 1GHz 25mVrms Max to 1GHz 25mVrms Max to 2GHz 40mVrms Max to 1 3GHz 50mVrms Max to 2 7GHz FREQUENCY COUNTER USER MANUAL 3 Coupling AC Impedance 50Ω Max Input Level 3Vrms sine wave General Resolution Gate time displays at least 7 digits for 1s 6 digits for 100ms 5 digits for 10ms respectively The maximum resolution for frequency measurement is 100nHz for 1Hz and 0 1Hz for 100M...

Page 3: ...cated in the label attached on the real panel to replace correct fuses WARNING To avoid electrical shock the power cord protective grounding conductor must be connected to ground When line voltages are changed replace the required fuses shown as below Line voltage Range Fuse Line voltage Range Fuse 100V 120V 90 110V 108 132V T200mA 250V 220V 230V 198 242V 207 253V T100mA 250V WARNING To avoid pers...

Page 4: ...level by setting on the TRIG LEVEL 9 TRIG LEVEL KNOB Pull the knob the TRIGGER LEVEL control will be variable over 2 5V ATT and push the knob to proceed auto set function 10 LPF ON Insert a 100kHz low pass filter into input A 11 ATT 1 20 Select attenuation for input A 1 Directly connect input signal to input amplifiers 20 Attenuate input signal by a factor of 20 12 COUP DC AC Select DC or AC coupl...

Page 5: ... TIME adjustment affects the sampling rate and the resolution of the reading Turn the knob counterclockwise for updating faster reading or turn it clockwise for more resolution digital display Pulling out the GATE TIME knob to freeze the latest displayed reading for being written down Then return the counter to normal operation by pressing back the knob When the instrument is starting measurement ...

Page 6: ...6 MAINTENENCE The following instructions are executed by qualified personnel only To avoid electrical shock do not perform any servicing other than the operating instructions unless you are qualified to do so 6 1 Standard method for calibration 1 Input offset voltage adjustment Push the TRIG LEVEL knob and turn it to the central position Connect a 10MHz sine wave to channel A input BNC Adjust SVR1...

Page 7: ...in a solution of mild detergent and water Do not spray cleaner directly onto the instrument because it may leak into the cabinet and cause damage Do not use chemicals containing benzine benzene toluene xylene acetone or similar solvents Do not use abrasive cleaners on any portion of the instrument ...

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