Rohde & Schwarz SMBV100A, Manual

Page: 515 / 780

Remote Control Commands
R&S
®
SMBV100A
498 Operating Manual 1407.6062.32 ─ 08
[:SOURce<hw>]:AWGN:CNRatio <CnRatio>
This command sets the carrier/interferer ratio. The value range depends on the selected
AWGN mode (
AWGN:MODE ADD|ONLY|CW
).
●
"Reference Mode Carrier" (
AWGN:POW:RMOD CARRier
)
The noise level is adjusted to the set C/N ratio and the carrier level is kept constant.
●
"Reference Mode Noise" (
AWGN:POW:RMOD NOISe
)
The carrier level is adjusted to the set C/N ratio and the noise level is kept constant.
This command is available for modes "Additive Noise" and "CW Interferer"
(
SOUR:AWGN:MODE ADD|CW
).
Parameters:
<CnRatio> float
Range:
-50.00 to 40.00
Increment: 0.01
*RST:
0
Default unit: dB
Example:
AWGN:CNR 10
sets a carrier/noise ratio of 10 dB.
[:SOURce<hw>]:AWGN:DISP:MODE <Mode>
Selects the display mode to Bseband or RF.
Parameters:
<Mode> RF | BB
*RST:
RF
Example: AWGN:DISP:MODE RF
sets the display mode to RF
[:SOURce<hw>]:AWGN:ENRatio <EnRatio>
This command sets the ratio of bit energy to noise power density in "Additive Noise"
mode.
Depending on the selected reference mode either the noise level (
AWGN:POW:RMOD
NOISe
) or the carrier level (
AWGN:POW:RMOD CARRier
) is adjusted to the set E
b
/N
0
ratio.
●
"Reference Mode Carrier" (
AWGN:POW:RMOD CARRier
)
the noise level is adjusted to the set E
b
/N
0
ratio and the carrier level is kept constant.
●
"Reference Mode Noise" (
AWGN:POW:RMOD NOISe
)
the carrier level is adjusted to the set E
b
/N
0
ratio and the noise level is kept constant.
For Digital Standard signals, the bit rate used for calculation of E
b
/N
0
value from C/N
value can be entered with command
SOUR:AWGN:BRAT.
SOURce Subsystem