TB 9-6625-1356-24
setting. If multimeter does not indicate within limits recorded in (9) through (11) above for
+ (plus) and - minus perform b below.
CAUTION
Adjust AMPLITUDE controls for minimum output when
changing FREQUENCY RANGE switch setting.
Table 5. Frequency Response
Test instrument
Multimeter indications
FREQUENCY RANGE
FREQUENCY
Hewlett-Packard
All other
switch settings
dial settings
model 651A
models
3%
2%
X10
2
3%
2%
X10
1
2%
1%
X100
1
2%
1%
X1K
5
2%
1%
X10K
5
2%
1%
X100K
5
2%
1%
X1M
1
4%
2%
X1M
4
4%
2%
X1M
6
4%
2%
X1M
8
4%
2%
X1M
10
b. Adjustments
(1) Adjust A2C14 (fig. 1) fm best overall flatness between 1 and 10 MHz.
(2) Set FREQUENCY RANGE switch to X1M and turn FREQUENCY dial to 10.
(3) Adjust AMPLITUDE controls for multimeter indication recorded in a (5) above.
(4) Adjust A1C15 (fig. 1) for a 2.40 V indication on TI meter (R).
11. Expand Monitor Flatness (Model 652A (SG-763/U) Only)
a. Performance Check
(1) Connect multimeter to TI using a 50 feedthrough termination.
(2) Position controls as listed in (a) through (f) below:
FREQUENCY RANGE switch to X100.
(a)
FREQUENCY dial to 4.
(b)
AMPLITUDE controls for a 3.00 V indication on multimeter.
(c)
NORMAL-EXPAND switch to EXPAND.
(d)
REF SET control for a 0 indication on TI meter expand scale.
(e)
NOTE
Do not change REF SET controls throughout remainder of test.
(f) AMPLITUDE controls for minimum output.
(3) Substitute thermal converter for 50 feedthrough termination.
Adjust
AMPLITUDE controls for 0 indication on TI meter expand scale. Record multimeter
indication.