152 Agilent N5181A/82A MXG Signal Generators SCPI Command Reference
Component Test Digital Commands
Dual ARB Subsystem–Option 651/652/654 ([:SOURce]:RADio[1]:ARB)
:NOISe:CBWidth
Supported N5182A with Option 403
[:SOURce]:RADio[1]:ARB:NOISe:CBWidth <value><unit>
[:SOURce]:RADio[1]:ARB:NOISe:CBWidth?
This command selects the carrier bandwidth over which the additive white gaussian noise (AWGN) is
applied. The noise power will be integrated over the selected bandwidth for the purposes of
calculating carrier to noise ratio (C/N). The carrier bandwidth is limited to the ARB sample rate, but
cannot exceed 125 MHz. For more information, refer to “:NOISe[:STATe]” and “:NOISe:BANDwidth”.
*RST +1.00000000E+000
Range 1Hz–100 MHz
Key Entry Carrier Bandwidth
:NOISe:CN
Supported N5182A with Option 403
[:SOURce]:RADio[1]:ARB:NOISe:CN <value><unit>
[:SOURce]:RADio[1]:ARB:NOISe:CN?
This command sets the carrier to noise ratio (C/N) in dB. The carrier power is defined as the total
modulated signal power without noise power added. The noise power is applied over the specified
bandwidth of the carrier signal. For more information, refer to “:NOISe:CBWidth” on page 152.
Example
:RAD:ARB:NOIS:CN 50DB
The preceding example sets the carrier to noise ratio to 50 dB.
*RST +0.00000000E+000
Range –100 to 100 dB
Key Entry Carrier to Noise Ratio
:NOISe[:STATe]
Supported N5182A with Option 403
[:SOURce]:RADio[1]:ARB:NOISe[:STATe] ON|OFF|1|0
[:SOURce]:RADio[1]:ARB:NOISe[:STATe]?
This command enables or disables adding real- time additive white gaussian noise (AWGN) to the
carrier modulated by the waveform being played by the dual ARB waveform player.
Maximum bandwidth cannot exceed 125 MHz.
Example
:RAD:ARB:NOIS ON
The preceding example applies real- time AWGN to the carrier.
*RST 0
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