Source Spur Avoidance Tracking Adjustment
Required Equipment and
‘Idols
BNC
AIIigator
Clip
Adapter
..................................
HP P/N
8120-1292
BNC-to-BNC Cable
...........................................
.HP P/N 8120-1840
Antistatic Wrist Strap
........................................
HP P/N 9300-1367
Antistatic Wrist Strap Cord
..................................
HP P/N 9300-0980
Static-control Table Mat and Earth Ground Wire
............
HP
P/N
9300-0797
Anulgzer
warmup time: 30 minutes.
This adjustment optimizes tracking between the YO (YIG oscillator) and the
cavity
oscillator
when they are frequency offset to avoid spurs. Optimizing
YO-cavity oscillator tracking reduces potential phase-locked loop problems.
1. Mate the adapter to the BNC cable and connect the BNC connector end to
AUX INPUT on the HP 8753E rear panel. Connect the BNC center conductor
alligator-clip
to All
TPlO
(labeled
4
ERR); the shield clip to All
TPl
(GND)
as shown in Figure 3-24.
BROWN
Al
lTP1
Al
lip10
GND
@ERR
UNLK
CAV ADJ
A3
Source
Figure 3-24. Location of All
Test
Points and
A3
CAV ADJ Adjustments
3-58 Adjustments and Correction Constants