HP 8560E Service Manual

406 Chapter8
IF Section
Introduction
Introduction
The IF Section contains the A4 Log Amplifier/Cal Oscillator and A5 IF
assemblies.
Troubleshooting Using the TAM........................................ page 408
Troubleshooting the Log Amplifier with the TAM.......... page 409
Troubleshooting A5 with the TAM................................... page 409
Troubleshooting the Cal Oscillator with the TAM.......... page 413
Automatic IF Adjustment................................................... page 415
Parameters Adjusted ........................................................ page 416
Requirements .................................................................... page 417
Performance Test Failures.................................................. page 419
IF Gain Uncertainty Performance Test ........................... page 419
Scale Fidelity Performance Test....................................... page 420
Resolution Bandwidths Performance Tests..................... page 420
Log Amplifier Assembly (P/O A4)....................................... page 421
Log Amplifier..................................................................... page 421
Linear Amplifiers.............................................................. page 422
Video Offset....................................................................... page 423
Video Output..................................................................... page 424
Frequency Counter Prescaler/Conditioner...................... page 425
AM/FM Demodulator........................................................ page 425
4.8 kHz IF Filters.............................................................. page 426
10.7 MHz IF Filters........................................................... page 426
4.8 kHz and 10.7 MHz IF Filters ..................................... page 427
10.6952 MHz VCXO.......................................................... page 428
Input Switch...................................................................... page 428
LO Switch.......................................................................... page 428
Synchronous Detector....................................................... page 429
Limiter............................................................................... page 429
Isolation Amplifier ............................................................ page 430
Detector/Mixer................................................................... page 430
Log Offset/Gain Compensation ........................................ page 430
Log Offset Compensation.................................................. page 430
Log Gain Compensation.................................................... page 430
Video MUX ........................................................................ page 431
A5 IF Assembly................................................................... page 432
IF Signature...................................................................... page 433
Common IF Signature Problems...................................... page 441
1 MHz Resolution Bandwidth Problems.......................... page 445
30 kHz Resolution Bandwidth Problems......................... page 447
3 kHz and 10 kHz Resolution Bandwidth Problems....... page 448
Step Gains ......................................................................... page 449
Cal Oscillator Assembly (P/O A4) ...................................... page 450
Cal Oscillator Unlock at Beginning of IF Adjust............. page 451
Inadequate CAL OSC AMPTD Range ............................. page 452
300 Hz to 3 kHz Resolution Bandwidth Out of Specification...page 453

HP 8560E Specifications

General

Brand	HP
Model	8560E
Category	Measuring Instruments
Language	English