HP 8904A - Page 226

Model 8904A Performance Tests
Procedure
AC Amplitude Accuracy
1. On the Multifunction Synthesizer, press SHIFT PRESET. After the instrument presets, key in
fl (Channel Config.)
NEXT
SHIFT FLOAT 1 ON
2. Connect the Multifunction Synthesizer OUTPUTS 1 HIGH and LOW outputs to the multimeter’s
high-impedance floating inputs through a
600R feedthrough termination. Use two BNC-to-
dual-banana plug adapters and
two BNC-to-single-banana plug adapters (supplied with the
Multifunction Synthesizer)
as necessary to maintain a floating output.
3. Set the digital multimeter to read ac volts.
4. Set the Multifunction Synthesizer’s amplitude and frequency as indicated in the following table.
For each setting, the amplitude as read on the digital multimeter should be within the limits
shown.
Multifunction Synthesizer Settings
Frequency (Hz)
30
100
1
000
10 000
20 000
100 000
30
100
1 000
10 000
20
000
100 000
30
100
1 000
10 000
20 000
100 000
Amplitude (Vrms)
10
10
10
10
10
10
1
1
1
1
1
1
0.1
0.1
0.1
0.1
0.1
0.1
AC Amplitude Flatness
5. On the Multifunction Synthesizer, key in
FREQ 1 kHz
AMPTD 10 V
INCR SET 10 mV
Voltage Reading Limits (Vrms)
Lower
Actual
9.4
9.4
9.4
9.4
9.4
8.8
0.94
0.94
0.94
0.94
0.94
0.88
0.094
0.094
0.094
0.094
0.094
0.088
10.6
10.6
10.6
10.6
10.6
11.2
1.06
1.06
1.06
1.06
1.06
1.12
0.1 06
0.1 06
0.106
0.1 06
0.1 06
0.112
Performance Test 4 4-15
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