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Insertion Loss - Keithley 7711 User Manual

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Figure 10
VSWR and insertion loss verification

Insertion loss

1. Connect cables as shown in
2. Close channel 1.
3. Select S12 or S21 measurement on the analyzer.
4. Display Log Magnitude plot on the network analyzer.
5. Verify specifications.
For the Model 7711, verify at 100MHz, 500MHz, 1GHz, 1.5GHz, and 2GHz.
For the Model 7712, verify at 500MHz, 1GHz, 2.5GHz, and 3.5GHz.
Refer to the Insertion Loss section of the Model 7711 or 7712 specifications values for acceptable limits.
6. Repeat procedure for remaining channels. Change the network analyzer connection to Port 2 to OUT B when verifying
channels 5–8.
Network analyzer
Port 1 Port 2
Figure
10.
Model 7711/7712
Ch1
Ch2
OUT A
Ch3
Ch4
Ch5
Ch6
OUT B
Ch7
Ch8
23

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