Agilent Technologies 8156A manual Using your Attenuator as a Variable Back Reflector

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Figure 4-1

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Using your Attenuator as a Variable Back Reflector

Configuring the Hardware

4.1 Configuring the Hardware

To use the attenuator as a back reflector, you need to set up the hardware as shown in the figure below.

If this your first time to use the attenuator as a back reflector, you first need to make some measurements. These require other setups before setting up the hardware as shown below (see “Setting Up the Software” on page 60).

The Hardware Configuration for the Back Reflector

Before using the instrument, you should make sure that it is properly warmed up. The instrument is properly warmed up when it has been switched on for a minimum of 45 minutes. Failure to do this can cause errors of up to 0.04dB in the attenuation.

If you are not using option 201, the connector interfaces you need depends on the connector type you are using. Option 121 or option 221 (the monitor output) is of no use when using the attenuator as a back reflector. The disruption to the back reflection performance by leaving this output open is negligible, though you may want to terminate it to eliminate any small effect it might have.

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