Performance Verification
2500A Series Operation Manual, 34172 Revision C, March 2008
4.3.3.3.5 Procedure - On/Off Ratio Test
1. Connect the test equipment and UUT as shown in Figure 4-9.
2. Set the Pulse Generator to the following settings:
Pulse Width: 5 msec.
Pulse Interval: 10 msec.
Output: 5 Volts into 50Ω
3. Set the UUT to the following settings:
Power Level: 0 dBm
External PM state: On
Trigger Polarity: Active high
RF Output state: On
4. Set the UUT to the first test frequency shown in Datasheet 10.
5. Set the Spectrum Analyzer to the following settings:
Frequency: Same as the frequency set at the UUT
Span: 0 Hz
Sweep Rate: Set to display two pulses (It might be necessary to adjust the
resolution bandwidth)
Vertical Scale: 10 dB/div
Resolution Bandwidth: 3 kHz
Video Averaging: 100
Trigger type: Video
6. Adjust the Spectrum Analyzer reference level so that the peak level of the pulse is at the top of the
display.
7. Measure the power difference between the on state and the off state of the displayed pulse, and
record the measurement in the “ON/OFF Ratio (dB)” column of Datasheet
10.
8. Repeat steps 5 through 7 for the other frequencies in Datasheet 10.
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