316 Agilent X-Series Signal Generators SCPI Command Reference
Arb Commands
Multitone Subsystem–N5172B/82B ([:SOURce]:RADio:MTONe:ARB)
• To enable the AWGN, refer to “:NOISe[:STATe]” on page 320.
*RST +1.00000000E+000
Key Entry Noise Bandwidth
:NOISe:CBRate
Supported N5172B/82B with Option 403
[:SOURce]:RADio:MTONe:ARB:NOISe:CBRate <1bps - 999Mbps>
[:SOURce]:RADio:MTONe:ARB:NOISe:CBRate?
This command sets a value of the carrier bit rate (gross bit rate) for purposes of calculating the
E
b
/N
0
(energy per bit over noise power density at the receiver). When the carrier to noise ratio
format is set to E
b
/N
0
(refer to the :NOISe:CNFormat command), the adjustment of the carrier bit rate
will have an immediate impact on the carrier to noise ratio as specified by E
b
/N
0
. The carrier bit rate
is derived from the symbol rate and bits per symbol of the modulation. The carrier bit rate is a saved
instrument state that is recorded in the waveform header.
The query returns the current carrier bit rate setting.
Default 1.000 bps
Range 1 bps to 999 Mbps
Key Entry Carrier Bit Rate
:NOISe:CBWidth
Supported N5172B/82B with Option 403
[:SOURce]:RADio:MTONe:ARB:NOISe:CBWidth <1Hz-80MHz>
[:SOURce]:RADio:MTONe:ARB:NOISe:CBWidth?
This command selects the carrier bandwidth over which the AWGN (additive white gaussian noise) is
applied. The noise power will be integrated over the selected bandwidth for the purposes of
calculating C/N (carrier to noise ratio). For more information refer to “:NOISe[:STATe]” on page 320.
*RST +1.00000000E+000
1.0 Hz
Range 1 Hz – 125 MHz (Minimum increment is .001 Hz)
Key Entry Carrier Bandwidth
:NOISe:CN
Supported N5172B/82B with Option 403
[:SOURce]:RADio:MTONe:ARB:NOISe:CN <-100dB - 100dB>
[:SOURce]:RADio:MTONe:ARB:NOISe:CN?
Range Option 653 1 sa to 75 Msa
Option 655 1 sa to 150 Msa
Option 656 1 sa to 100 Msa
Option 657 1 sa to 200 Msa
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