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180 Service Procedures
Appendix D
AC Amplitude Adjustment (High-Z)
The function generator stores twenty-two calibration constants related to
HIGH Z output, and sixteen calibration constants related to 50 Ω output. The
constants are calculated from the adjustment value entered. The calibration
constants are stored following completion of SETUP 22 (HIGH Z output)
and the calibration procedure may be aborted after that point. No calibration
constants are stored if the procedures are aborted at any other setup.
1. Use a DMM to measure the function generator ACrms output voltage
for SETUP 08. These adjustments use a HIGH Z output termination.
2. Send the CAL:VALue <measured Vac> to the function generator.
3. Send CAL? command to the function generator to initiate calibration.
4. Repeat steps 1, 2 and 3 for SETUP 09 through 29.
5. Perform the “AC Amplitude Verification” on page 169.
Table D-13. AC Amplitude (High Z) Adjustment Setups
Nominal Output
SETUP FREQUENCY AMPLITUDE Adjustment for:
08 1 kHz 5.5 V rms 2 dB Output Attenuator
09 1 kHz 4.4 V rms 4 dB Output Attenuator
10 1 kHz 3.5 V rms 6 dB Output Attenuator
11 1 kHz 2.8 V rms 8 dB Output Attenuator
12 1 kHz 2.2 V rms 10 dB Output Attenuator
13 1 kHz 1.7 V rms 12 dB Output Attenuator
14 1 kHz 1.4 V rms 14 dB Output Attenuator
15 1 kHz 1.1 V rms 16 dB Output Attenuator
16 1 kHz 0.88 V rms 18 dB Output Attenuator
17 1 kHz 0.70 V rms 20 dB Output Attenuator
18 1 kHz 0.55 V rms 22 dB Output Attenuator
19 1 kHz 0.44 V rms 24 dB Output Attenuator
20 1 kHz 0.35 V rms 26 dB Output Attenuator
21 1 kHz 0.28 V rms 28 dB Output Attenuator
22 1 kHz 0.22 V rms 30 dB Output Attenuator
23 1 kHz 5.5 V rms 2 dB Pre-attenuator
24 1 kHz 4.4 V rms 4 dB Pre-attenuator
25 1 kHz 3.5 V rms 6 dB Pre-attenuator
26 1 kHz 2.8 V rms 8 dB Pre-attenuator
27 1 kHz 2.2V rms 10 dB Pre-attenuator
28 1 kHz 1.7 V rms 12 dB Pre-attenuator
29 1 kHz 1.4 Vrms 14 dB Pre-attenuator