Basic Function Commands
Vector Modulation Subsystem—N5172B/82B ([:SOURce]:IQ)
:OUTPut:IMPairments:AWGN:POWer:SIGNal
[:SOURce]:IQ:OUTPut:IMPairments:AWGN:POWer:SIGNal <value>
[:SOURce]:IQ:OUTPut:IMPairments:AWGN:POWer:SIGNal?
Sets the current signal power level if noise is on. In the "Signal" control mode,
the total power will be adjusted to achieve the specified signal power and the
signal power level will be maintained regardless of changes to the other noise
parameters. A change to the total power will change the signal power setting
appropriately to maintain the S/N ratio.
In the other control modes, this will adjust the total power once for the
specified signal power level, after which the signal power could change if any
noise parameters are adjusted.
The range varies based on the bounds of the total power that results from the
noise settings.
:OUTPut:IMPairments:AWGN:SBRate
[:SOURce]:IQ:OUTPut:IMPairments:AWGN:SBRate <value>
[:SOURce]:IQ:OUTPut:IMPairments:AWGN:SBRate?
This value adjusts the signal bit rate (gross bit rate) for purposes of calculating
the Eb/No (energy per bit over noise power density at the receiver). Adjusting
this parameter will have an immediate impact on the SNR as appropriate for
the last specified Eb/No. The signal bit rate is a saved instrument state that is
recorded in the waveform header for Arb waveforms.
This value is only used if
[:SOURce]:IQ:OUTPut:IMPairments:AWGN:SNRFormat is EBNO and the
application currently on does not define a reference channel for Eb/No.
124
Key Entry
Total Noise Power
Supported
N5172B with Option 653 or 655, N5182B with Option
656 or 657
Range
Varies based on the bounds of the total power that
results from the noise settings
Key Entry
Signal Power
Supported
N5172B with Option 653 or 655, N5182B with Option
656 or 657
Range
1 bps to 999 Mbps
Key Entry
Reference Signal Bit Rate
Keysight EXG and MXG X-Series Signal Generators SCPI Command Reference
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