5. Log Amplifier Adjustments
20. Adjust
for DVM indication of + 1.000 fO.OOO1 V
dc. See Figure 3-34 for location of adjustment. If unable to adjust
for proper indication, increase or decrease value
of
(If
is fully clockwise, increase the
of
Refer to
3-3 for range of values.
21. Repeat steps 17 through 20, until specifications of steps 18 and 20
are achieved without further adjustment. Because adjustments
and
are interactive, several iterations are
needed.
22. Press the LIN pushbutton. DVM indication at
should be
+ 1.000
V dc
to + 1.020 V dc). If indication is
not within this range, repeat steps 14 through 21. If indication is
within this range, press
[
ENTER
This disables the
IF step gains.
23. Decrease the frequency synthesizer output level 10
Press
(
REFERENCE LEVEL
)
0
and adjust the frequency synthesizer
output level for a DVM indication of + 1.00 f.OO1 Vdc.
24. Verify that attenuator is set at 10
Decrease the frequency
synthesizer output level by 10
Press
LEVEL
)
-60
25. Adjust
for DVM indication of + 1.000 fO.O1O V dc.
See Figure 3-34 location of adjustment. If unable to adjust
for proper indication, increase or decrease
of
Refer to
3-3 for range of values.
26. Decrease the frequency synthesizer output level by 10
27. Key in
(
REFERENCE LEVEL
)
-70
28. Adjust
LG20 for DVM indication of 1.000 fO.O1O
V dc. See Figure 3-34 for location of adjustment. If unable to
adjust LG20 for proper indication, increase or decrease value of
Refer to
3-3 for range of values.
29. Press
to reenable the IF step gains.
3-72 Adjustments
