DC
Offset
Accuracy
This procedure tests the
HP
E1440A
DC
offset accuracy when no
AC
(DC
only)
function output is present.
Specifications
1%
of full range
f
0.02 mV
Equipment Required
DC Digital Voltmeter
500 Feedthru Termination
Procedure
1. Connect the HP E1440A signal output directly to the 500
feedthru termination and then with a cable to the DC digital
voltmeter input.
2.
Set the output so that only the DC output is present.
OUTPUT Vxi
;
I'
:
FUNC DC"
3.
Set the HP E1440A DC offset to 5 V, and calibrate.
OUTPUT Vxi
;
I'
:VOLT
:
OFFS
5
;
:
CAL?
I'
4.
The voltmeter reading should be between +4.950 and +5.050
V.
5. Change the HP E1440A DC offset to
-5
V.
OUTPUT Vxi
;
"
:VOLT
:
OFFS
-5
;
6.
The voltmeter reading should be between -4.950 and -5.050
V.
Attenuator Test.
This procedure continues from the previous one.
7.
Set the DC offset to the positive and negative voltages below.
The digital voltmeter reading should be within the tolerances
shown for each voltage.
C-32
Performance tests
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