HP 8340B Manual page 288

5-15.
ALC ADJUSTMENTS
Reference
Performance Test: Maximum Leveled Output
Power
and Accuracy
Service Section:
RF Section
LOGGER TEMPERATURE COMPENSATION
Description
NOTE
The
following logger
temperature compensation procedure
should only
be done
if
either
A11
or A12
Detector is
replaced.
The logger in
A25 has temperature compensation
in both
high and low bands. This procedure
calcu¬
lates the values for the four factory-selected resistors in
the temperature compensation circuit.
DIGITAL VOLTMETER
I°^^^^H
WER SUPP
»
Ea
00 -.OO
0 fl
+
r
0.
I
"F
'
„,„„„,„
)
000000.
°^
S
LY
1
1
<
1
1
IMa
'
SMB
M
T
•
ADA
r^—^
i i
;
i i
i i
i i
0 BNC F
PTER
3—i—»'l
i
•
1——»J
-
W26
i-^-e—
W2?
r
>
,
c
:
•
• ;
'
•
i
i
i
i
i
i
i
BANC
DETE
A1
rr
L—
HIGH
DETE
A1
rr
;
) 0
CTOR
2
•~1
1
1
.J
BANDS
CTOR
1
'"I
L--J
Figure 5-45. Logger Temperature Compensation Test
Setup
HP B340B/41B
Adjustments 5-89