Rohde & Schwarz FSVA - Page 688

Remote Control
R&S
®
FSVA/FSV
688Operating Manual 1176.7510.02 ─ 09
The level value of marker 1 is regarded as the carrier level. On activating the function,
marker 2 and marker 3 are automatically set as delta markers symmetrically to the car-
rier to the adjacent maxima of the trace.
If the position of delta marker 2 is changed, delta marker 3 is moved symmetrically with
respect to the reference marker (marker 1). If the position of delta marker 3 is changed,
fine adjustment can be performed independently of delta marker 2.
The power at the marker positions is calculated from the measured levels.
The AM modulation depth is calculated from the ratio of power values at the reference
marker and the delta markers. If the two AM sidebands differ in power, the average
value of the two power values is used for calculating the AM modulation depth.
Suffix:
<n>
.
Selects the measurement window.
<m> irrelevant
Parameters:
<State> ON | OFF
*RST: OFF
Example:
CALC:MARK:X 10MHZ
Sets the reference marker (marker 1) to the carrier signal at 10
MHz.
CALC:MARK:FUNC:MDEP ON
Switches on the modulation depth measurement.
CALC:DELT2:X 10KHZ
Sets delta markers 2 and 3 to the signals at 10 kHz from the car-
rier signal.
CALC:DELT3:X 9.999KHZ
Corrects the position of delta marker 3 relative to delta marker 2.
Manual operation: See "AM Mod Depth" on page 313
See "AM Mod Depth" on page 410
CALCulate<n>:MARKer<m>:FUNCtion:NDBDown <Distance>
This command defines the distance of the n dB down markers to the reference marker.
The temporary markers T1 and T2 are positioned n dB below the active reference
marker. The frequency and time position of these markers can be queried with
CALCulate<n>:MARKer<m>:FUNCtion:NDBDown:FREQuency? and
CALCulate<n>:MARKer<m>:FUNCtion:NDBDown:TIME?. The bandwidth between
the markers can be queried with CALCulate<n>:MARKer<m>:FUNCtion:NDBDown:
RESult?.
Suffix:
<n>
.
Selects the measurement window.
<m> irrelevant
Remote Control – Commands