Table of Contents
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FREQUENCY COUNTER
USER MANUAL
⎯ i ⎯
FREQUENCY COUNTER
USER MANUAL
CONTENTS
1.
PRODUCT INTRODUCTION.............................................
1-1.Description.......................................................
1-2.Feature............................................................
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.....................
3-4.General Preparation............................................
4.
PANEL INTRODUCTION......................................... 5
5.
APPLICATION.......................................................
5-1.Sensitivity.........................................................
5-2.Input Sensitivity Characteristic..............................
5-3.Maximum Input Voltage.......................................
5-4.Typical Applications............................................
6.
CIRCUIT DESCRIPTION..........................................
6-1.Theory of Operation.............................................
6-2.Frequency Measurement Accuracy.........................
7.
MAINTENANCE.....................................................
7-1.Standard Method for Calibration...........................
7-2.Cleaning............................................................
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Summary of Contents for GW Instek GFC-8010H
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Page 1: Table Of Contents
FREQUENCY COUNTER FREQUENCY COUNTER USER MANUAL USER MANUAL CONTENTS PAGE PRODUCT INTRODUCTION..........1-1.Description………………………………………………. 1-2.Feature…………………………………………………... TECHNICAL SPECIFICATION…………………………... 2 PRECAUTIONS BEFORE OPERATION…….…………... 3-1.Unpacking the Instrument………………….…………... 3-2.Checking the Line Voltage…………………..…………. 3-3.Equipment Installation and Operation………………... 3-4.General Preparation…………………………………….. PANEL INTRODUCTION……………………..…………… 5 APPLICATION………………………………………………. 5-1.Sensitivity………………………………………………… 5-2.Input Sensitivity Characteristic………………………... 5-3.Maximum Input Voltage………………………………... -
Page 2: Product Introduction
FREQUENCY COUNTER FREQUENCY COUNTER USER MANUAL USER MANUAL 1. PRODUCT INTRODUCTION 2. TECHNICAL SPECIFICATIONS 1-1. Description 10Hz~10MHz 15mV The GFC-8010H frequency counter is a general-purpose counter Sensitivity 10MHz~40MHz 20mV with a measurement range from 0.1Hz~120MHz and 20mVrms (rms) 40MHz~80MHz 35mV 80MHz~120MHz 50mV high input sensitivity. -
Page 3: Precautions Before Operation
FREQUENCY COUNTER FREQUENCY COUNTER USER MANUAL USER MANUAL 3-3.Equipment Installation, and Operation 3.PRECAUTIONS BEFORE OPERATION Ensure there is proper ventilation for the vents in the case. If this 3-1.Unpacking the Instrument equipment is used not according to the specification, the protection The instrument has been fully inspected and tested before shipping from provided by the equipment may be impaired. -
Page 4: Panel Introduction
FREQUENCY COUNTER FREQUENCY COUNTER USER MANUAL USER MANUAL Front Panel 4. PANEL INTRODUCTION (1). Counter Input BNC type connector. (2). ATT, 1/1, 1/10 Attenuation button of input sensitivity. 1/1 : Directly connect input signal to input amplifiers. 1/10: Attenuate input signal by a factor of 10. (3). -
Page 5: Application
FREQUENCY COUNTER FREQUENCY COUNTER USER MANUAL USER MANUAL 5. APPLICATION As refer to Fig. 2, when input voltage is at V+, the output voltage is high 5-1. Sensitivity ), while input voltage is at V , the output voltage is low (V ). -
Page 6: 5-2.Input Sensitivity Characteristic
FREQUENCY COUNTER FREQUENCY COUNTER USER MANUAL USER MANUAL The erroneous counting can be prevented by satisfying two conditions below: a) To make peak-to-peak value of the noise voltage smaller than V b) When peak-to-peak value of unknown signal is larger than V , perform measurements by first setting SENSITIVITY to 1/10, then set it to 1/1 range to protect the input circuit and avoid erroneous counting. -
Page 7: 5-3.Maximum Input Voltage
FREQUENCY COUNTER FREQUENCY COUNTER USER MANUAL USER MANUAL 2).Measurement can also be easily performed when calibrating the 5-3. Maximum input voltage oscillation frequency of a grid dip meter by merely connecting the one The maximum input voltage Vs frequency characteristics is shown as turn clip cord. -
Page 8: Circuit Description
FREQUENCY COUNTER FREQUENCY COUNTER USER MANUAL USER MANUAL 6. CIRCUIT DESCRIPTION 6-2. Frequency Measurement Accuracy 6-1. Theory of Operation Measurement Accuracy In order to get the most benefit from the frequency counter, it’s useful to Frequency measurement accuracy is determined by the following two comprehend the circuit thoroughly. - Page 9 FREQUENCY COUNTER FREQUENCY COUNTER USER MANUAL USER MANUAL The temperature stability of the crystal oscillator is: 2×10 (temperature 0~60℃) with 25℃ as reference. The temperature of 0~60℃ is given here because the High Accuracy Measurement internal temperature rise is approximately 20 ℃ and the 0~40 ℃ ambient The accuracy of the time base oscillator is almost completely determined by the characteristics of the crystal oscillator.
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Page 10: Maintenance
FREQUENCY COUNTER FREQUENCY COUNTER USER MANUAL USER MANUAL 7.MAINTENENCE In actual practice, the worst case conditions described above are almost never The following instructions are executed by qualified personnel only. To encountered, and furthermore, the high accuracy state is maintained. An example avoid electrical shock, do not perform any servicing other than the operating of rise characteristics given in Fig.
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