292 Agilent X-Series Signal Generators SCPI Command Reference
Arb Commands
Dual ARB Subsystem–N5172B/82B ([:SOURce]:RADio:ARB)
:NOISe:CNFormat
Supported N5172B/82B with Option 403
[:SOURce]:RADio:ARB:NOISe:CNFormat CN|EBNO
[:SOURce]:RADio:ARB:NOISe:CNFormat?
This command selects either the Carrier to Noise Ratio (C/N) or energy per bit over noise power
density at the receiver (E
b
/N
0
) as the variable controlling the ratio of carrier power to noise power in
the carrier bandwidth.
Example
:RAD:ARB:NOIS:CNF EBNO
The preceding example sets the carrier to noise ratio format to E
b
N
o
.
Default Carrier to Noise Ratio Format C/N
Key Entry Carrier to Noise Ratio Format C/N E
b
/N
o
:NOISe:EBNO
Supported N5172B/82B with Option 403
[:SOURce]:RADio:ARB:NOISe:EBNO <ebno in dB>
[:SOURce]:RADio:ARB:NOISe:EBNO?
This command allows the C/N to be set using the E
b
/N
0
(energy per bit over noise power density at
the receiver) form. This requires that the carrier bit rate ( :NOISe:CBRate on page 290) be set
properly. The range of E
b
/N
0
is limited to the range that is equivalent to –100 to 100 dB of C/N. This
value is only effective when E
b
/N
0
has been enabled by the :NOISe:CNFormat command.
The query returns the value of EBNO.
Default 0 dB
Range –100 to 100 dB
Key Entry Carrier to Noise Ratio Format E
b
/N
o
:NOISe:MUX
Supported N5172B/82B with Option 403
[:SOURce]:RADio[1]:ARB:NOISe:MUX SUM|CARRier|NOISe
[:SOURce]:RADio[1]:ARB:NOISe:MUX?
This command enables diagnostic control of additive noise, such that only the noise, only the carrier,
or the sum of both the noise and the carrier are output from the internal baseband generator. With
the ALC off, this feature enables direct measurement of just the carrier or the noise contributions to
the total power. The system will still behave as if both the noise and the carrier are present on the
output when it comes to determining the Auto Modulation Attenuation and the RMS level for RMS
Power Search.
Example
:RAD:ARB:NOIS:MUX CARR
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