Agilent Technologies PSA Series Manual page 100

Making Measurements
Modulation Rate Measurement
The Modulation Rate measurement is used in conjunction with the following three
NOTE
measurements:
• "AM Depth Measurement" on page 82
• "FM Deviation Measurement" on page 87
• "PM Deviation Measurement" on page 93
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
Usually
need to measure low rate signals, you can select
signal bandwidth by pressing
Selecting
modulation measurement. The minimum IF bandwidth is set as twice wider
than Low Pass Filter.
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
100
IF BW Type
.
100 kHz
.
Min
mode is sufficient for most measurement conditions. When you
Auto
IF BW
type allows you to use the minimum IF bandwidth to perform the
Min
, 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
, 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 to set the actual
Man
.
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:
. The default
Man
,
Auto Man
key.
Avg Number
and the
Off
and
Exp
.
Off
Chapter 3