R&S SMJ100A, Operating Manual

Page: 591 / 874

Remote Control Commands
R&S
®
SMJ100A
575 Operating Manual 1403.7458.32 ─ 14
the carrier power is adjusted to the set E
b
/N
0
ratio and the noise power is kept con-
stant.
For Digital Standard signals, the bit rate used for calculation of E
b
/N
0
value from C/N
value is defined with command
SOUR:AWGN:BRAT.
For Custom Digital Mod signals the bit rate used for calculation of E
b
/N
0
value from
C/N value is determined by the selected standard (
SOURce:BB:DM:STANdard
) and
cannot be changed.
Parameters:
<EnRatio> float
Range:
-50 to depends on hardware
Increment: 0.01
*RST:
15.84
Default unit: dB
Example: AWGN:ENR 10
sets a ratio of bit energy to noise power density of 10 dB
Manual operation: See "E
b
/N
0
- AWGN" on page 298
[:SOURce<hw>]:AWGN:FREQuency:RESult?
In CW inerferer mode, queries the actual frequency of the sine.
The actual frequency may differ from the desired frequency, since the resolution is limi-
ted to 0.7 Hz.
Return values:
<Result> float
Range:
-40E6 to 40E6
Increment: 0.01
*RST:
0
Example: AWGN:FREQ:RES?
queries the actual frequency of the interfering sine
Usage: Query only
Manual operation: See "Resulting CW Frequency - AWGN" on page 296
[:SOURce<hw>]:AWGN:FREQuency:TARGet <Target>
Sets the desired frequency of the sine in
AWGN:MODE CW
mode.
The resulting frequency may differ from the desired frequency because of the limited
frequency resolution of 0.7 Hz.
Parameters:
<Target> float
Range:
-40E6 to 40E6
Increment: 0.01
*RST:
0
SOURce Subsystem