258 Agilent X-Series Signal Generators SCPI Command Reference
Arb Commands
Dmodulation Subsystem–N5172B/82B with Option 431 ([:SOURce]:RADio:DMODulation:ARB)
Example
:RAD:DMOD: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 431 and 403
[:SOURce]:RADio:DMODulation:ARB:NOISe:EBNO <ebno in dB>
[:SOURce]:RADio:DMODulation: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) 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 E
b
/N
0
.
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 431 and 403
[:SOURce]:RADio[1]:DMODulation:ARB:NOISe:MUX SUM|CARRier|NOISe
[:SOURce]:RADio[1]:DMODulation: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:DMOD:ARB:NOIS:MUX CARR
The preceding example enables the direct measurement of the carrier contribution to the total power.
Default Carrier+Noise
Key Entry Carrier+Noise | Carrier | Noise
:NOISe:POWer:CARRier
Supported N5172B/82B with Option 431 and 403
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