Measurement Settings - Agilent Technologies PSA Series Manual

Making Measurements
FM Deviation Measurement

Measurement Settings

To adjust measurement settings press
IF BW
Allows the IF Bandwidth to be changed. Pressing this key automatically sets the
to .
BW Type Man
Range is 1 kHz to 10 MHz.
IF BW Type
Selections are or
Auto Man
Default setting is .
Auto
performs an occupied bandwidth measurement on the modulated signal. This
Auto
measurement occurs at the start of any modulation measurement, and will
determine the final IF bandwidth used to analyze the signal. Measurement
throughput can be affected since extra time is required during measurement
initialization to perform the bandwidth measurement. Auto is usually sufficient for
most measurements.
(Manual) allows the experienced user to select a bandwidth for demodulation.
Man
The value must be chosen with care since a value too low may result in inaccurate
results and a value too high will result in unwanted noise and increase the
measurement time. In Man mode, measurement throughput is increased over Auto
mode since the initialization occupied bandwidth measurement is not
automatically performed. When measurements of low rate or high deviation
FM/PM signals are necessary, select
the IF BW key.
To change the average number between
When setting to , enter the number. The default average setting is
On
default number is 25 when switching to
during the average period, wait until the averaging is done or the next averaging
period starts.
To change the average mode, toggle the
The default average mode is
Trigger Source
Requires PSA firmware revision A.11.08 or above, or Option 23A.
Available trigger sources are
, or .
Front Ext Rear
Default is .
Free Run
When trigger source
Video
adjust, press the hardkey, then
Trig
88
.
Meas Setup
.
type and manually set the IF BW using
Man
and , press the
On Off
. When the input signal is changed
On
key between
Avg Mode
.
Repeat
,
Free Run (immediate) Video (IF Envlp)
is selected, the default trigger level is − 6 dBm. To
.
Level
IF
key.
Avg Number
and the
Off
and .
Exp Repeat
, ,
RF Burst Ext
Chapter 3