488 Chapter10
Controller Section
Introduction
Introduction
The controller section includes the A2 controller assembly, A19 GPIB
assembly, and BT1 battery. The presence of a display (graticule and
annotation) verifies that most of A2 controller assembly is operating
properly.
Page
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. Figure 10-1 on page 489 shows the
location of the A2 test connectors.
Frequency Count Marker Problems .................................page 503
Frequency Counter ...........................................................page 505
Video Input Scale Ampli ers and Limiters .......................page 509
12-Bit Flash ADC .............................................................page 511
32 K-Byte Static RAM.......................................................page 512
Reference Clock ................................................................page 513
16 MHz Harmonic Filter ...................................................page 514
State- and Trace- Storage Problems..................................page 515
Keyboard Problems...........................................................page 516
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