HP 85108, System Manual

Page: 87 / 136

5
Adjustments
Introduction
This section con tains the pro cedures for adjusting the pulse detector b oards (A3 and A4) in
the HP 85102 IF detector. These b oards m ust b e adjusted for minimum circularity error when
they are replaced, sw app ed with eac h other, or when the HP 85102 IF detector is upgraded to
include pulsed-RF capabilit y (using the HP 8511B Upgrade kit).
Equipment Required
The follo wing equipmen t is required (in addition to the system instrumen ts) to p erform the
pulse detector adjustmen ts.
Item HP P art/Mo del Numb er
RF Source
(CW sinew a v e, 20.1 Mhz,
-10 to -15 dBm)
HP 3324A, 3325, 8340/41B, 8360 series
1
T est Cable
(required for the adjustmen t pro cedure,
included in the HP 85111A/B upgrade kits)
85111-60001
Adapters
2
T yp e-N (m) to BNC (f ) 1250-0780
SMA (m) to BNC (m) 1250-1787
BNC (f ) to BNC (f ) 1250-0080
T yp e-N (m) to BNC (m) 1250-0077
1 Only those that will provide 20.1 MHz.
2 Some com bination of these adapters ma y b e required to use the test cable with your source in the
adjustment pro cedure.
Adjustments 5-1