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Chapter 4 Calibration Procedures
Low Frequency Flatness Adjustment
4
Low Frequency Flatness Adjustment
The Low Frequency Flatness adjustment calculates the flatness response
of 3 attenuator paths with the Elliptical filter and 2 attenuator paths
with the Linear Phase filter.
1 Set the DMM to measure Vrms. Make the connections shown on page 78.
2 Use the DMM to measure the output voltage for each of the setups in the
table below.
* Constants are stored after completing this setup.
3 Using the numeric keypad or knob, adjust the displayed voltage at each
setup to match the measured voltage. Select ENTER VALUE.
4 After performing setup 43:
a. If your calibration procedures require you to verify the adjustment just
made, exit the calibration menu and perform “Low Frequency Flatness
Verification”, on page 62.
b. If you are making all the adjustments and then verifying the instrument’s
performance, continue with the next procedure in this chapter.
Nominal Signal
Setup Frequency Amplitude
34* 1 kHz 0.56 Vrms Flatness for 0 dB, Elliptical Filter
35* 100 kHz 0.56 Vrms Flatness for 0 dB, Elliptical Filter
36* 1 kHz 0.56 Vrms Flatness for 0 dB, Linear Phase Filter
37* 100 kHz 0.56 Vrms Flatness for 0 dB, Linear Phase Filter
38* 1 kHz 1.7 Vrms Flatness for +10 dB, Elliptical Filter
39* 100 kHz 1.7 Vrms Flatness for +10 dB, Elliptical Filter
40* 1 kHz 5.6 Vrms Flatness for +20 dB, Elliptical Filter
41* 100 kHz 5.6 Vrms Flatness for +20 dB, Elliptical Filter
42* 1 kHz 5.6 Vrms Flatness for +20 dB, Linear Phase Filter
43* 100 kHz 5.6 Vrms Flatness for +20 dB, Linear Phase Filter
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