Yto Main Coil Driver Adjustments Setup - HP 8566B Adjustment Manual

13. Sweep, DAC, and Main Coil Driver Adjustments
C.
Key in @Z?XiYj 1 (to set YTO Pretune DAC to 0).
d. Adjust A19R50 for DVM indication of + 10.0000 f0.0005 Vdc.
e. Connect DVM to A19TP2 (DVM ground to A19TP3).
f. Key in [RECALL] 2 (to set YT.0 Pretune DAC to 4095).
After sweep has completed, adjust A19R9 for stable DVM
indication of -18.6000 f0.0005 Vdc.
h. Key in [RECALL_) 3 (to set YTO Pretune DAC to 293).
i. After sweep has completed, adjust A19R19 Summing Amplifier
OFFSET for a stable DVM indication of -6.9010 f0.0005 Vdc.
Repeat steps f through i until no further adjustments are
necessary.
k. Key in (ml 4 and note stable DVM indication after sweep
has completed.
1. Key in (RECALL) 5 and note change in stable DVM indication
from previous step.
m. Adjust A19R56 2.5 GHz SPAN OFFSET while alternating
between (RECALL_) 4 and (m) 5 so that stable DVM
indication varies less than 1 mVdc.
n. Key in [RECALL) 4 and note stable DVM indication after sweep
has completed.
0.
Key in (jj] 6 and note change in stable DVM indication
from previous step.
Adjust A19R41 25 GHz SPAN OFFSET while alternating
between (RECALL) 4 and [Wj 6 so that stable DVM
indication varies less than 1 mVdc.
19.
Jumper A20TP5 GND to A21TP2 and disconnect DVM from
Disconnect the cable 8 (grey) from All YTO Loop Assembly at
21.
Connect frequency counter to front-panel 1ST LO OUTPUT as
shown in Figure 3-61.
Figure 3-61. YTO Main Coil Driver Adjustments Setup