.HP
8114A Service Guide
Optocoupler
Check for a signal output at TP201,
TP203,
TP204, and TP205 while
varying the output amplitude. In the state of rest (not varying the
output amplitude) there is
+5
VFL present.
Amplifier
DACs
The specified output amplitude range is internally divided into 6
ranges. Eighteen hybrids are necessary to cover the amplitude range.
There are four hybrid groups, each controlled by a DAC. Different
hybrid groups are active or switched off in the
6
amplitude ranges.
Following table shows in which amplitude range which output voltage
is present at, which
DAC:
lhble
5-11.
4.99 v 0.0 v 0.0 v
1.06 V
0.0 v
5.00 v
0.0 v 0.0 v
0.71 v
0.71 v
7.99 v
0.0 v 0.0 v
1.12 v 1.13 v
8.00 v
0.0 v 0.57 v 0.0 v 0.0 v
15.99 v
0.0 v
1.12 v
0.0 v 0.0 v
16.00 V
0.62 V
0.0 v
0.62 V
0.0 v
29.99 v 1.15 v
0.0 v
1.15 v
0.0 v
30.00 v
0.71 v
0.71 V 0.71 v
0.71 v
50.05 v
1.17 v
1.17 v 1.18 v 1.18 V
5.18 Troubleshooting
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