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Chapter 4 Calibration Procedures
AC Amplitude Flatness Adjustment
This procedure can be performed with one of three types of measurement device; a broadband ACrms voltmeter, a power meter, or a thermal voltage converter. The procedure differs slightly depending upon the type of measurement device used. These adjustments us a 50W output termination.
1Use a DMM to measure the ACrms output voltage of the function generator and enter the measurement value for the setup in the table below.
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SETUP | FREQUENCY | AMPLITUDE | Reference for: |
64 | 1 kHz | 3.0 V rms | 1 kHz flatness DAC gain |
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2a. 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 and enter the value for the setup in the table below. (If your power meter does not measure to 1 kHz, see the transfer measurement procedure below.)
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SETUP | FREQUENCY | AMPLITUDE | Reference for: |
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83 | 1 kHz | 3.0 V rms | V rms, dBm |
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Transfer Measurement Procedure
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 E4418A 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 to obtain a 100 kHz output. Measure the output with the power meter and record the measured value. Perform setup 83 and enter the recorded value (not a new measurement). Then, perform step 3 (you will use setup 65 twice). This procedure assumes the output of the function generator 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 measurement for the setup in the table below (TVC values entered are in mVdc).
| Nominal Output |
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SETUP | FREQUENCY | AMPLITUDE | Reference for: |
84 | 1 kHz | 3.0 V rms | Thermal Voltage Converter |
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