User`s guide

72 N9320A Spectrum Analyzer

4 Key Reference

Amplitude

Press hardkey to activate the reference level function

and access the amplitude softkey menu.

The softkey menu selections are described as follows:

Ref Level Softkey sets the reference level. This function is activated

when is pressed. The reference level is the amplitude

power or voltage represented by the top line of the graticule

on the display. Setting the reference level changes the

absolute amplitude level (in the selected amplitude units) of

the top graticule line.

Key access:

Attenuation

Auto Man

Softkey toggles the input attenuation between Auto and Man.

The attenuation level can be set in as little as 1 dB

increments when Man is selected. The analyzer input

attenuator is normally coupled to the reference level control,

it reduces the power level of the input signal at the input

mixer. Selecting Auto re- couples the attenuator. Change the

attenuation by using the arrow keys, the knob, or the

numeric keypad.

Key access:

Scale/Div Softkey sets the logarithmic units per vertical graticule

division on the display. The Scale/Div function is available

only when the Scale Type key is set to Log.

Key access:

Scale Type

Log Lin

Softkey scales the vertical graticule divisions in logarithmic

units when Log is selected. The valid logarithmic units are 1,

2, 5 and 10 dB per division. When Lin is underlined, the

vertical divisions are linearly scaled with default amplitude

units of volts. The top of the graticule represents the

reference- level value; the bottom of the graticule represents

zero volts. (Each division is one- tenth of the reference level.)

Key access:

Amplitude