
Agilent X-Series Signal Generators SCPI Command Reference
357
Digital Signal Interface Module Commands
Digital Subsystem—Option 003 and 004 ([:SOURce])
Default
Carrier to Noise Ratio Format C/N
Key Entry
Carrier to Noise Ratio Format C/N E
b
/N
o
:DIGital:DATA:INPut:NOISe:EBNO
Supported
N5172B/82B with option 004
:DIGital:DATA:INPut:NOISe:EBNO <ebno in dB>
:DIGital:DATA:INPut: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 (
:DIGital:DATA:INPut: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
:DIGital:DATA:INPut:NOISe:CNFormat
command.
The query returns the value of EBNO.
Example
:DIG:DATA:INP:NOIS:EBNO
The preceding example enables the direct measurement of the carrier contribution to the total power.
Default
0 dB
Range
100 to 100 dB
Key Entry
E
b
/N
o
:DIGital:DATA:INPut:NOISe:MUX
Supported
N5172B/82B with option 004
:DIGital:DATA:INPut:NOISe:MUX SUM|CARRier|NOISe
:DIGital:DATA:INPut: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
:DIG:DATA:INP:NOIS:MUX CARR
The preceding example enables the direct measurement of the carrier contribution to the total power.
Default
Noise
Key Entry
Noise
|
Carrier
|
Noise
Содержание 72B
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