R&S FSW Series, Руководство пользователя

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Remote Commands
R&S
®
FSW
1193 User Manual 1173.9411.02 ─ 43
Parameters:
<Distance> Distance of the temporary markers to the reference marker in
dB.
For a positive offset, the markers T1 and T2 are placed
below
the active reference point.
For a negative offset (for example for notch filter measure-
ments), the markers T1 and T2 are placed
above the active ref-
erence point.
*RST:
6dB
Default unit: DB
Example: CALC:MARK:FUNC:NDBD 3dB
Sets the distance to the reference marker to 3 dB.
CALCulate<n>:MARKer<m>:FUNCtion:NDBDown:FREQuency?
This command queries the position of the n dB down markers on the x-axis when mea-
suring in the frequency domain.
To get a valid result, you have to perform a complete measurement with synchroniza-
tion to the end of the measurement before reading out the result. This is only possible
for single sweep mode.
See also
INITiate<n>:CONTinuous
on page 835.
Suffix:
<n>
.
irrelevant
<m> irrelevant
Return values:
<Frequency> <frequency 1>
absolute frequency of the n dB marker to the left of the reference
marker in Hz
<frequency 2>
absolute frequency of the n dB marker to the right of the refer-
ence marker in Hz.
Example: INIT:CONT OFF
Switches to single sweep mode.
CALC:MARK:FUNC:NDBD ON
Switches on the n dB down function.
INIT;*WAI
Starts a sweep and waits for the end.
CALC:MARK:FUNC:NDBD:FREQ?
This command would return, for example, 100000000,
200000000, meaning that the first marker position is at 100
MHz, the second marker position is at 200 MHz
Usage: Query only
Manual operation: See "n dB down Value" on page 541
Analyzing Measurements (Basics)