470 Chapter9
Controller Section
Introduction
Introduction
The controller section includes the A2 controller assembly, A19 HP-IB
assembly, and BT1 battery. The presence of a display (graticule and
annotation) verifies that most of the A2 controller assembly is operating
properly.
Troubleshooting Using the TAM (8560E).......................... page 471
Blank Display (8560E)...................................................... page 471
Digital Signature Analysis − DSA (8560E)........................ page 474
Display Problems (8560E) .................................................. page 475
Line Generators ................................................................ page 475
Blanking ............................................................................ page 476
Display Jumbled or Trace Off Screen .............................. page 478
Intensity ............................................................................ page 482
Bad Characters or Graticule ............................................ page 483
Long Lines Dimmer than Short Lines............................. page 483
Analog Zero-Span Problems (8560E) ................................ page 486
Frequency-Count Marker Problems................................... page 487
Frequency Counter.............................................................. page 489
State- and Trace-Storage Problems ................................... page 499
Keyboard Problems............................................................. page 500
NOTE When measuring voltages or waveforms, make ground connections to
A2TP3. The metal board-standoffs are not grounded and should not be
used when taking measurements.
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