User`s guide

Key Reference 4

N9320A Spectrum Analyzer 71

Int Preamp

On Off

(Option PA3) Toggles the internal pre- amplifier function

between on and off. Pressing Int Preamp (On) results in a

correction being applied to compensate for the gain of the

preamp. Amplitude readings then represent the signal value

at the input connector. When the preamp is on, a “PA”

indication appears on the left side of the display. The

preamp operates over a range of 100 kHz to 3 GHz.

Key access:

Y Axis Accesses the softkeys that change the amplitude units

(logarithmic or linear). Change the amplitude units by

pressing dBm, dBmV, dBuV, dBuA, Watts, Volts, and Amps.

Key access: > More

Ref Lvl Offset Adds an offset value to the displayed reference level.

Reference- level offsets are only entered by using the numeric

keypad. Entering an offset does not affect the trace or the

attenuation value. Reference- level offsets are used when gain

or loss occurs between a device under test and the analyzer

input. Thus, the signal level measured by the analyzer may

be referred to as the level at the input of an external

amplitude- conversion device. When an amplitude offset is

entered, its value appears on the left side of the display

under Offst (as opposed to frequency offsets which appear

at the bottom of the display). To eliminate an offset, press

Ref Lvl Offst > 0 > dB.

Key access: > More

Ext Amp Gain Adds a positive or negative preamplifier gain value, which is

subtracted from the displayed signal. (Use negative values

for gain and positive values for loss.) The function is similar

to the Ref Lvl Offset function, however with the Ext Amp Gain

function, the attenuation may be changed depending on the

preamplifier gain entered. A preamplifier gain offset is used

for measurements that require an external preamplifier or

long cables. The offset is subtracted from the amplitude

readout so that the displayed signal level represents the

Amplitude