User`s guide

70 N9320A Spectrum Analyzer

4 Key Reference

Amplitude

Press activates the reference level function and

accesses the amplitude softkeys.

Ref Level 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

Toggles the input attenuation between Auto and Man and set

the attenuation level in 5 dB increments when Man is

selected. The analyzer input attenuator, which is normally

coupled to the reference level control, reduces the power

level of the analyzer 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 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

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