R&S FSV-K7, Operating Manual, Page: 133 / 262

Analog Demodulation Option R&S FSV–K7
R&S
®
FSV-K7/K7S
133 Operating Manual 1176.7561.02 ─ 06
The offset thus determined differs from the one calculated by the
CALCulate<n>:
MARKer:FUNCtion:ADEMod:FERRor[:RESult<t>]?
on page 87 command since,
for determination of the frequency deviation, the modulation is removed by means of
low pass filtering,producing results that are different from those obtained by averaging.
Parameters:
<Type> <result type> | IMMediate | AVERage
IMMediate
The current measurement results will be used for calculating the
FM offset
AVERage
The measurement results that were averaged over the given #
of measurements will be used for calculating the FM offset
If no average measurement was active during the last measure-
ment sequence only the
[SENSe:]ADEMod:FM:OFFSet
IMMediate
command (see
[SENSe:]ADEMod:FM:OFFSet
on page 132) will return a correct result (data to calculate the off-
set are taken from the last measured data set).
[SENSe:]ADEMod:FM:OFFSet AVERage
will cause a query
error in this case.
Example:
ADEM:SET 8MHz,32000,EXT,POS,-500,30
, see
[SENSe:
]ADEMod:SET
on page 138
Sets up demodulator parameters to execute 30 measurements
ADEM:FM AVER,OFF,OFF
Selects FM results to perform averaging
ADEM:AM OFF,OFF,OFF
Switches off AM demodulation
ADEM ON
, see
[SENSe:]ADEMod[:STATe]
on page 121
Switches on analog demodulator
INIT; WAI
Starts measurement and waits for sync
ADEM:FM:OFFS? IMM
Reads FM offset of last measurement of the sequence of 30
ADEM:FM:OFFS? AVER
Reads FM offset averaged over 30 measurements
Mode: ADEMOD
[SENSe:]ADEMod:MTIMe <Time>
This command defines the measurement time for analog demodulation.
Parameters:
<Time> *RST: 62.5us
Example: ADEM:MTIM 62.5us
Sets the measurement time to 62.5 µs.
Mode: ADEMOD
Manual operation: See "Meas Time" on page 31
Remote Commands of the Analog Demodulation (R&S FSV–K7)