> Sweep
> The Sweep 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) menu 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 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) menu 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) menu key.

> 2. | Press Sweep Type to switch between Single and Continuous.

> RF Immunity
> The instrument defaults to RF Immunity High. This setting protects the instrument from stray signals generated by nearby or co-located transmitters that can affect frequency and DTF measurements. The algorithm used to improve instrument’s ability to reject unwanted signals slows down the sweep speed. If the instrument is used in an environment where immunity is not an issue, the RF Immunity key can be set to Low to optimize sweep speed. Use this feature with caution, as the introduction of an interfering signal might be mistaken for a problem with the antenna or cable run. If Immunity is set to Low during a normal Return Loss or VSWR measurement, the instrument will be more susceptible to interfering signals. Interfering signals can make the measurement look better or worse than it really is.

> 1. | Press the Sweep (3) menu key.

> 2. | Toggle RF Immunity between High and Low.

> RF Pwr In Hold
> This setting determines if the RF output power at the RF Out/Reflect In port stays on or is turned off when the instrument’s Run/Hold setting is toggled to Hold. When RF Pwr In Hold is Off, the power at the port is turned off when the instrument is placed in Hold mode and not sweeping.
> Power at the port is resumed when the Run/Hold setting is toggled back to Run.
> This is useful for users who may not want a signal radiating out of the port at all times.