
User Manual 155
5.2.1
Demod Type
Analog modulation analysis includes AM, FM, PM modulation.
Command format
[:SENSe]:ADEMod:STYLe
[:SENSe]:ADEMod:STYLe?
Instructions
Sets the analog demodulation type
Get analog demodulation type (cannot be queried when not analog
demodulation)
Parameter type
Enumeration
Parameter Range
AM: analog AM
FM: analog frequency modulation
PM: Analog phase modulation
Return
Enumeration
:
AM|FM|PM
Example
:ADEMod:STYLe AM
5.2.2
IFBW
The IFBW specifies the size of the IF bandwidth of the analyzed signal. If the setting is incorrect, it
will affect the accuracy of the measurement results. The intermediate frequency bandwidth IFBW
should be as small as possible, which can improve the signal-to-noise ratio of demodulation. IFBW
can be set to: 1.2MHz, 960kHz, 600kHz, 480kHz, 300kHz, 240kHz, 120kHz, 96kHz and 60kHz.
For "AM" modulation analysis, the IFBW should be more than twice the modulation frequency; for
"FM" modulation analysis, the IFBW should be more than twice the sum of the frequency offset
plus the modulation frequency.
Command format
:CALCulate:IFBW:INDEx
:CALCulate:IFBW:INDEx?
Instructions
Set the analog demodulation if bandwidth
Obtain analog demodulation intermediate frequency bandwidth
Parameter type
Enumeration
Parameter Range
0-8
Return
0-8
Example
:CALCulate:IFBW:INDEx 5
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