The Sweep Setup menu includes keys to set Data Points, Run/Hold, Sweep Type, and RF Immunity.
Data Points
The number of data points can be set to 130, 259, 517, 1033, or 2065 data points. This can be changed before or after calibration, with one exception (see Note below). The default setting is 259. This is recommended for most measurements. Additional data points slow down the sweep speed but are helpful in DTF, as it enables increased distance coverage for the same distance resolution.
1. Press the Sweep (3) key, then press Data Points.
2. Select 130, 259, 517, 1033, or 2065 data points.
Refer to Sweep Menu for additional information about the Sweep Setup menu and submenus.
Note
Setting Data Points to 2065 will invalidate an active Standard Cal correction that was performed with a lower number of data points. A new calibration is recommended before making measurements.
Run/Hold
This key is used to start and stop line sweeping. When the sweep type is set to single mode, this key triggers a single sweep.
1. Press the Sweep(3) key.
2. Press Run/Hold to start or stop the line sweep.
Sweep Type
Use this key to toggle between single and continuous sweep mode. In single sweep mode, each sweep is initiated with the Run/Hold key.
1. Press the Sweep (3) key.
2. Press Sweep Type to switch between Single and Continuous.
RF Immunity
The RF Immunity setting provides a way to protect the instrument from stray signals generated by nearby or co-located transmitters that can affect frequency and DTF measurements. Interfering signals can make the measurement look better or worse than it is. To improve the instrument’s ability to reject unwanted signals, you can set the RF Immunity to High. However, sweep speed may be slowed as a result.
The Immunity default setting is Low, which makes the instrument more susceptible to interfering signals during a Return Loss or VSWR measurement, but optimizes sweep speed. This is appropriate when the instrument is used in an environment where RF noise is not of great concern.