Agilent Technologies PSA Series Manual page 104

Making Measurements
Modulation Distortion Measurement
The Modulation Distortion measurement is used in conjunction with the following
NOTE
three measurements:
• "AM Depth Measurement" on page 82
• "FM Deviation Measurement" on page 87
• "PM Deviation Measurement" on page 93
First run one of these three measurements, then press the
key. Or Manually select the modulation by pressing
Modulation Mode
Step 6. To adjust measurement settings, press
1. To change the IF BW, press the
unit. Meanwhile, the
setting is
2. To change the IF BW Type, press the
and
When you need to measure low rate signals, you can select
actual signal bandwidth by pressing
to the
If you specify a Low Pass Filter, it's recommended to select Min:
NOTE
IF BW > 2 * LP Filter
3. To change the average number between
When setting to
default number is 25 when switching to
during the average period, wait until the averaging is done or the next
averaging period starts.
4. To change the average mode, toggle the
Repeat
Step 7. To adjust the detector, press
1. Pressing the
2. Pressing the
positive and negative peak readings.
3. Pressing the
4. Toggle the
Step 8. To adjust the filters, press
1. Press
2. Press
104
among ,
AM FM
IF BW Type
.
100 kHz
. Usually Auto mode is sufficient for most measurement conditions.
Min
.
Low Pass Filter
, enter the number. The default average setting is
On
. The default average mode is
Det/Demod
or
PEAK− PEAK+
key allows you to display the average value of the
PEAK+-/2
key allows you to select the average detector.
RMS
key between
Peak Hold
Det/Demod
to select a value.
High Pass Filter
to select a value.
Low Pass Filter
Modulation Distortion
Det/Demod
and .
PM
, then:
Meas Setup
key and enter the bandwidth value and
IF BW
will be automatically set to
key to select from
IF BW Type
. type sets the
IF BW Min
and , press the
On Off
. When the input signal is changed
On
key between
Avg Mode
.
Repeat
, to select a detector:
Detector
key allows you to check modulation symmetry.
and . The default setting is
On Off
, then:
and toggling
. The default
Man
,
Auto Man
mode to set the
Man
according
IF BW
key.
Avg Number
and the
Off
and
Exp
.
Off
Chapter 3