85
Chapter 4 Calibration Procedures
+20 dB Range Flatness Adjustment
4
4
+20 dB Range Flatness Adjustment
Caution Most power meters will require an attenuator (-20 dB) or special power
head to measure the +20 dB output.
Be sure to correct the measurements for the specifications of the
attenuator you use. For example, if the nominal attenuator value
is –20 dB at the specified frequency, you must add 20 dB to the power
meter reading before entering the value.
1 Make the connections as shown below.
2 Use the power meter to measure the output amplitude for each of the
setups in the table on the next page.
Note Setup 80 establishes the power meter reference for all the remaining
setups in this table. You must always perform setup 80 before any of the
following setups.
* Constants are stored after completing this setup.
Continued on next page...
Nominal Signal
Setup Frequency Amplitude
80* 100 kHz 2.8 Vrms 22 dBm Power Meter Reference
81* 200 kHz 2.8 Vrms 22 dBm Flatness for +20 dB, Elliptical Filter
82* 500 kHz 2.8 Vrms 22 dBm Flatness for +20 dB, Elliptical Filter
83* 1.5 MHz 2.8 Vrms 22 dBm Flatness for +20 dB, Elliptical Filter
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