DC
Offset Accuracy
This procedure tests the
HP
E1440A
DC
offset accuracy when
an
AC
with
AC
Functions
function output is present.
-
Specifications
DC
+
AC, up to
1
MHz:
1.2%
For ramps up to
10
kHz:
2.4%
DC
+
AC, from
1
MHz to
20
MHz:
3%
Equipment Required
DC Digital Voltmeter
5052
Feedthru Termination
Procedure
1.
Connect the equipment as shown in Figure
C-12,
and set the
voltmeter to measure DC voltage.
Voltmeter
(HP3456Fl)
50
Ohm Fccdthru ~crmlnaior/
1
Figure
C-12.
DC
Offset Test Set-Up
2.
Set the HP
E1440A
output
as
follows, and calibrate:
High-Voltage Output Off
Function
Sine
Frequency
21
MHz
Amplitude
1
VP-P>
DC Offset
t4.5
V
OUTPUT Vxi
;
"
:
OUTP
:
AMPL OFF
;
:FUNC S1N;:FREQ 2.1E7;
:VOLT
:
AMPL 1
;
:VOLT:OFFS 4.5;
:
CAL? I'
3.
After amplitude calibration (approximately
2
seconds) the
voltmeter reading should be
+4.350
to
+4.650
Vdc.
4.
Change the
HP
E1440A
DC offset to
-4.5
V
OUTPUT Vxi;":VOLT:OFFS -4.5"
5.
The voltmeter reading should be
-4.350
to
-4.650
Vdc.
C-34
Performance tests
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