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186 Service Procedures
Appendix D
1. Use a broadband ACrms voltmeter to measure the ACrms output
voltage of the function generator for SETUP 64 in table D-19 then go
to step 3 to enter that value. Go to step 2 if using a power meter.
2. A. If you are using a broadband ACrms voltmeter, proceed to step 3.
B. If you are using a power meter capable of measurements at 1 kHz,
use the power meter to measure the function generator output for
SETUP 83 in table D-20 then go to step 3 to enter that value. (If your
power meter does not measure to 1 kHz, see the transfer measurement
procedure below).
Power Meter Transfer Measurement Procedure (> 1 kHz)
If you are using a power meter not capable of measurement to 1 kHz,
you can perform the transfer measurement at a different frequency.
For example, the Agilent 437A Power Meter with the Agilent 8482A
probe and 20 dB attenuator are specified to a low frequency of 100
kHz. To use this measurement device, perform step 1, then use SETUP
65 (instead of SETUP 64) to obtain a 100 kHz output. Measure the
output with the power meter, record the measured value, perform
SETUP 83 and enter the recorded value from SETUP 64 (not a new
measurement). Then, perform step 3 (you will use SETUP 65 twice).
This procedure assumes the function generator output is flat from
1 kHz to 100 kHz.
C. If you are using a Thermal Voltage Converter (TVC), use the TVC
to measure the function generator output and enter the measure- ment
for SETUP 84 in table D-21. (TVC values entered are in mVDC).
Table D-19. AC Flatness Adjustment Setup (broadband AC Voltmeter)
Nominal
Output
+
SETUP FREQUENCY AMPLITUDE Reference for:
64 1 kHz 3.0 V rms 1 kHz flatness DAC gain
Table D-20. AC Flatness Adjustment Setup (power meter)
Nominal Out-
put
+
SETUP FREQUENCY AMPLITUDE Reference for:
83 1 kHz 3.0 V rms V rms, dBm
Table D-21. AC Flatness Adjustment Setup (thermal converter)
SETUP FREQUENCY AMPLITUDE Reference for:
84 1 kHz 3.0 V rms Thermal Voltage Converter