Nrl Normalized Reference Level; Figure 7-196 Nrl Syntax - Agilent Technologies 8560E User Manual

Agilent technologies 8560 e-series and ec-series spectrum analyzers

Table of Contents

Language Reference

NRL Normalized Reference Level

Figure 7-196

The NRL command sets the normalized reference level. It is intended to

be used with the NORMLIZE command. When using NRL, the input

attenuator and IF step gains are not affected. This function is a

trace-offset function enabling the user to offset the displayed trace

without introducing hardware-switching errors into the

stimulus-response measurement. The unit of measure for NRL is dB.

In absolute power mode (dBm), reference level (RL) affects the gain and

RF attenuation settings of the instrument, which affects the

measurement or dynamic range. In normalized mode (relative power or

dB-measurement mode), NRL offsets the trace data on-screen and does

not affect the instrument gain or attenuation settings. This allows the

displayed normalized trace to be moved without decreasing the

measurement accuracy due to changes in gain or RF attenuation. If the

measurement range must be changed to bring trace data on-screen,

then the range level (see RL) should be adjusted. Adjusting the

range-level in normalized mode has the same effect on the instrument

settings as does reference level in absolute power mode (normalize off).

A normalization error will occur when the NRL command is executed if

the current spectrum analyzer state is not the same as the state stored

by the last execution of the STORETHRU or STORESHORT command.

This can happen when several open/short or thru calibrations are