13. Sweep, DAC, and Main Coil Driver Adjustments
Offset
and
YTO
DAC
15. Perform this step only if the Al6 Scan Generator is P/N
Adjustments
85660-60134 or 85660-60034. (HP 85660AB with serial number
prefix 2235A or below.)
a.
b.
C.
d.
e.
f.
8.
h.
i.
j.
k.
1.
m.
n.
Connect DVM to
A16TP3
and DVM ground to A16TPl GND.
Key in
(jZZi%J
SWEEP (SINGLE), (SHIFT)
(RES)r
(forces
spectrum analyzer to reset Scan Ramp to 0 Vdc after each
single sweep).
Press SWEEP
(ZiYZXQ.
After sweep has completed, adjust
A16R74
Scan Reset
OFFSET for stable DVM indication of
0.0000
f0.0005 Vdc.
Repeat steps c through d until no further adjustment is
necessary.
Connect DVM to
A16TP5
and DVM ground to Al6TP6 GND.
Key in
[W]
(iEZT)),
[CENTER FREQUENCY) 4
GHz,
(FREQUENCY SPAN) 2.4
GHz,
[SAVE)
1,
(FREQUENCY SPAN) 260 MHz,
@EJ
2,
@~EENCY
SPAN)
240 MHz,
m
3, [FREQUENCY SPAN)
80 MHz,
IsAvE_]
4.
Key in
(-1
1 and note stable DVM indication after sweep
has completed.
Key in
(jj]
2 and note change in stable DVM indication
from previous step.
Adjust
A16R75
Scan Width DAC OFFSET while alternating
between
(-1
1 and
[RECALL_)
2 so that stable DVM
indication varies less than 1
mVdc.
Connect DVM to
A16TP8
and DVM ground to
A16TP7
GND.
Key in
C-1
3 and note stable DVM indication after sweep
has completed.
Key in
@ZXiIiJ
4 and note change in stable DVM indication
from previous step.
Adjust
A16R76
Integer Number Attenuator OFFSET while
alternating between
[mj
3 and
(j-1
4 so that stable
DVM indication varies less than 1
mVdc.
16. Perform this step only if the Al6 Scan Generator is
P/N
85660-60188, 85660-60198, or 85660-60247. (HP 85660AB with
serial number prefix 2240A or above.)
a. Connect DVM to Al6TP8 and DVM ground to
A16TP7.
b. Key in
(2--22j,
SWEEP
[SINGLE],
CSHIFT)
(REsBWr
(forces
instrument to reset Scan Ramp to 0 Vdc after each single
sweep).
c. Press SWEEP
[SINGLEI).
d. After sweep is completed, adjust
A16R62
RAMP OFFSET for
stable DVM indication of 0.0000
f0.0005
Vdc.
e. Repeat steps c through d until no further adjustment is
necessary.
3-l 18 Adjustments
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