HP 8560E Service Manual

354 Chapter7
ADC/Interface Section
Introduction
Introduction
The ADC/Interface section includes the A1A1 keyboard, A1A2 RPG
(rotary pulse generator), and A3 interface assemblies. In 8560E
instruments with option 007, the A16 fast ADC board is also part of the
ACD circuitry. For an explanation of fast ADC circuitry in 8560EC
instruments see the section on the fast ADC located in chapter 9.
Table 7-1 on page 355 lists signal versus pin numbers for control cable
W2.
Troubleshooting Using the TAM........................................ page 357
Automatic Fault Isolation................................................. page 357
Keyboard/RPG Problems .................................................... page 360
Keyboard Interface............................................................ page 360
RPG Interface.................................................................... page 361
Triggering or Video Gating Problems................................ page 363
Preselector Peaking Control (Real Time DAC).................. page 366
Flatness Control (RF Gain DACs)...................................... page 367
A3 Assembly Video Circuits
Log Offset/Log Expand ..................................................... page 371
Video MUX ........................................................................ page 372
Video Filter........................................................................ page 372
Video Filter Buffer Amplifier............................................ page 374
Positive/Negative Peak Detectors..................................... page 374
Peak Detector Reset.......................................................... page 376
Rosenfell Detector............................................................. page 377
ADC MUX.......................................................................... page 378
Variable Gain Amplifier (VGA) ........................................ page 380
Track and Hold.................................................................. page 380
A3 Assembly ADC Circuits................................................. page 381
ADC Control Signals......................................................... page 381
ADC Start/Stop Control.................................................... page 382
ADC ASM .......................................................................... page 383
ADC.................................................................................... page 383
Ramp Counter................................................................... page 384
A3 Assembly Control Circuits............................................ page 385
Analog Bus Drivers........................................................... page 385
Analog Bus Timing............................................................ page 386
Interface Strobe Select...................................................... page 387
A16 Assembly Fast ADC Circuits (Option 007 in the 8560E)....page 389
Video Input Scaling Amplifiers and Limiter ................... page 389
8-Bit Flash ADC................................................................ page 390
Peak/Pit Detection............................................................. page 391
32 K-Byte Static RAM....................................................... page 392
A16 Assembly Fast ADC Control Circuits (Option 007 in the 8560E page 393
CPU Interface and Control Registers .............................. page 393
Reference Clock................................................................. page 397
Clock and Sample Rate Generator................................... page 397

HP 8560E Specifications

General

Brand	HP
Model	8560E
Category	Measuring Instruments
Language	English