HP 3325A Calibration Manual page 19

(8) Remove 50 feedthrough termination from equipment setup.
(9) Press SIGNAL key on.
(10) Enter 20 VOLT using DATA keys. Multimeter will indicate between 19.775
and 20.225 V dc.
(11) Enter -20 VOLT using DATA keys. Multimeter will indicate between -19.775
and -20.225 V dc.
b. Adjustments. No adjustments can be made.
18. Dc Offset with Ac
a. Performance Check
(1) Connect SIGNAL to multimeter INPUT HI and LO using 50
termination.
(2) Press keys and enter values using DATA keys as listed in (a) through (i) below:
(a) SIGNAL off (option 002 not lit).
(b) FUNCTION sine wave.
(c) ENTRY FREQ.
(d) 20.999 999 999 MHz.
(e) ENTRY AMPTD.
(f) 1 VOLT.
(g) ENTRY DC OFFSET.
(h) 4.5 VOLT.
(i) AMPTD CAL.
(3) Multimeter will indicate between 4.35 and 4.65 V dc.
Table 5. Dc Offset - Continued
Test instrument
DC OFFSET
settings
14.99 mV
-14.99 mV
4.999 mV
-4.999 mV
1.499 mV
-1.499 mV
Perform (8) through (11) below for option 002 only.
Multimeter indications
(V dc)
Min
0.01493
-0.01505
0.004979
-0.005019
0.001479
-0.001519
NOTE
TB 9-6625-2049-35
Max
0.01505
-0.01493
0.005019
-0.004979
0.001519
-0.001479
feedthrough
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