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Panasonic VP-7722A User Manual

Panasonic VP-7722A
110 pages
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Panasonic VP-7722A Specifications

General IconGeneral
BrandPanasonic
ModelVP-7722A
CategoryMeasuring Instruments
LanguageEnglish

Summary

3. CIRCUIT DESCRIPTION

3.1 POWER SUPPLY A4

Details the power supply system for the digital circuit, oscillator, and analyzer.

3.2 OSCILLATOR A5, A6

Covers the oscillator sections A5 and A6, including amplitude control.

3.3 PREAMPLIFIER A7

Discusses the preamplifier boards A7 for L and R channels and their functions.

3.3.1 Input connector A7-1

Describes input connectors for balanced and unbalanced measurements.

3.3.2 Input attenuator A7-1

Explains the operation of the input attenuator when activated by signal level.

3.3.3 Preamplifier A7-1

Details the preamplifier circuit, amplification factors, and input conditioning.

3.3.4 Average detector A7-2

Describes the average detector for signal level measurements and its data conversion.

3.3.5 IMD measurement filter A7-2

Explains the IMD measurement circuit block diagram and its components.

3.4 1ST, 2ND NOTCH BOARDS A8, A9

Covers the 1st and 2nd notch boards for fundamental wave rejection.

3.4.1 1st NOTCH board

Details the components and block diagram of the 1st notch filter circuit.

4. ADJUSTMENT

EQUIPMENT REQUIRED

Lists the necessary equipment for performing adjustments and maintenance.

4.1 PREPARATION

Details preparations required before starting adjustment procedures.

4.3.2 80 MHz VCO

Adjustment and check procedures for the 80 MHz VCO.

4.4 OSCILLATOR BOARD A6

Details adjustments for the oscillator board A6.

4.4.1 Offset of oscillator amplifier

Procedure for adjusting the offset of the oscillator amplifier.

4.4.2 ALC

Adjustment and check procedures for the Automatic Level Controller (ALC).

4.5 ATTENUATOR BOARD A5

Procedures for checking and adjusting the attenuator board A5.

4.5.5 Attenuation check

Procedure for checking the attenuation factor of the attenuator.

4.6 PREAMPLIFIER (L CHANNEL) A7

Adjustments for the Preamplifier (L Channel) board A7.

4.6.1 Offset adjustment of preamplifier

Procedure to adjust the offset of the preamplifier.

4.6.4 B input preattenuator

Setup and adjustment procedure for the B input preattenuator.

4.7 PREAMPLIFIER (R CHANNEL) A7

Adjustments for the Preamplifier (R Channel) board A7.

4.8.1 Offset adjustment of 2nd notch amplifier(A9)

Procedure for offset adjustment of the 2nd notch amplifier.

4.8.3 Offset adjustment of auto tuning circuit (A9)

Adjustment procedure for the auto tuning circuit.

4.8.4 Offset of 1st notch amplifier

Procedure for adjusting the offset of the 1st notch amplifier.

4.8.5 Fundamental wave rejection circuit

Adjustment procedure for the fundamental wave rejection circuit.

4.8.6 80 kHz fundamental wave rejection

Adjustment and check procedures for 80 kHz fundamental wave rejection.

4.9 2ND NOTCH BOARD A9

Procedures for the 2nd Notch Board A9.

4.9.1 HPF offset

Adjustment procedure for the High-Pass Filter (HPF) offset.

4.9.2 PSOPHO offset

Adjustment procedure for the PSOPHO offset.

4.9.3 Offset amplifier 2

Adjustment procedure for offset amplifier 2.

4.9.4 Gain and offset of average response

Procedures for adjusting gain and offset of average response.

4.9.5 PSOPHO gain

Adjustment procedure for PSOPHO gain.

4.10 1ST NOTCH BOARD A8

Procedures for the 1st Notch Board A8.

4.10.1 Deviation of 1 kHz 2nd harmonic

Procedure for adjusting deviation of 1 kHz 2nd harmonic.

4.10.2 Deviation of 100 kHz 2nd harmonic

Procedures for adjusting deviation of 100 kHz 2nd harmonic.

4.10.3 Fundamental wave rejection circuit

Procedures for the fundamental wave rejection circuit.

4.11 A/D CONVERTER BOARD A11

Adjustment procedure for the A/D Converter Board A11.

4.12 TROUBLESHOOTING FLOW CHART

Troubleshooting flowchart for identifying issues with the VP-7722A.

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