Internal Second Source

The following PNA models include an internal second source.

How to use the second source

• Set frequency using the Frequency Offset Opt 080 dialog.

• Set power using the Advanced Power dialog.

• Source power calibration of the second source is performed as usual.

• Using FCA, click the LO button to set frequency and power.

• The specifications of the second source are the same as source 1.

Benefits / Uses of the second source

• Up to five times faster than stepping an external source.

• Measure Mixers with internal swept or fixed LO.

• Measure TOI or Intermodulation distortion.

Internal Second Source Restrictions

Source 1 and Source 2 are available at specific ports as follows:

4-port models

• Source 1 power is available at Port 1 OR Port 2; NOT at both ports simultaneously.

• Source 2 power is available at Port 3 AND Port 4; BOTH ports simultaneously. (Although it is possible, the PNA firmware typically prevents both ports from sweeping simultaneously for measurement integrity purposes.)

• Other routing configurations are possible using the RF Path Configurator.

PNA-X  Opt 224 (PNA-X 2-port model):

• Source 1 power is available at Port 1 OR Port 2; NOT at both ports simultaneously.

• Source 2 (SRC 2) power is available at Out 1 AND Out 2; BOTH ports simultaneously.

• Other routing configurations are possible using the RF Path Configurator.

Remotely Accessing the Internal Second Source

See Remotely Specifying a Source Port.

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