13. Sweep, DAC, and Main Coil Driver Adjustments
15. Perform this step only if the Al6 Scan Generator is P/N
85660-60134 or 85660-60034. (HP
with serial number
prefix 2235A or below.)
a.
b.
C.
d.
e.
f.
h.
i.
k.
1.
m.
n.
Connect DVM to
and DVM ground to
GND.
Key in
SWEEP (SINGLE), (SHIFT)
(forces
spectrum analyzer to reset Scan Ramp to 0 Vdc after
each
single sweep).
Press SWEEP
After sweep has completed, adjust
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
and DVM ground to
GND.
Key in
[
CENTER FREQUENCY
)
4
(
FREQUENCY SPAN
)
2.4
[SAVE)
1,
(
FREQUENCY SPAN
)
260
MHz,
2,
SPAN
)
240
MHz,
3,
[
FREQUENCY SPAN
)
80
MHz,
4.
Key in
1 and note stable DVM indication after sweep
has completed.
Key in
2 and note change in stable DVM indication
from previous step.
Adjust
Scan Width DAC OFFSET while alternating
between
1 and
2 so that stable DVM
indication varies less than 1
Connect DVM to
and DVM ground to
GND.
Key in
3 and note stable DVM indication after sweep
has completed.
Key in
4 and note change in stable DVM indication
from previous step.
Adjust
Integer Number Attenuator OFFSET while
alternating between
3 and
4 so that stable
DVM indication varies less than 1
16. Perform this step only if the Al6 Scan Generator is
85660-60188, 85660-60198, or 85660-60247. (HP
with
serial number prefix 2240A or above.)
a. Connect DVM to
and DVM ground to
b. Key in
SWEEP
(forces
instrument to reset Scan Ramp to 0 Vdc after each single
sweep).
c. Press SWEEP
d. After sweep is completed, adjust
RAMP OFFSET for
stable DVM indication of 0.0000
Vdc.
e. Repeat steps c through d until no further adjustment is
necessary.
3-l 18 Adjustments
