Agilent X-Series Signal Generators SCPI Command Reference 359
Digital Signal Interface Module Commands
Digital Subsystem—Option 003 and 004 ([:SOURce])
total power and carrier power are dependent variables set by the total noise
power, C/N and the rest of the noise settings. The total power and carrier power
will change as any noise parameter is adjusted to keep the total noise power and
the C/N at their last specified values.
N Channel In this mode the total noise power and C/N are independent variables and the
total power and carrier power are dependent variables set by the total noise
power, C/N and the rest of the noise settings. The total power and carrier power
will change as any noise parameter is adjusted to keep the total noise power and
the C/N at their last specified values.
Default Total
Key Entry Total C arrie r Tota l Noi se
:DIGital:DATA:INPut:NOISe:POWer:NOISe:CHANnel
Supported N5172B/82B with option 004
:DIGital:DATA:INPut:NOISe:POWer:NOISe:CHANnel <value>
:DIGital:DATA:INPut:NOISe:POWer:NOISe:CHANnel?
This command sets the power within the channel bandwidth. The instrument power is changed in
relation to this setting if AWGN is turned on. The channel noise power is only settable from the front
panel when the Power Control mode is set to channel noise power.
The variable <value> is expressed in units of dBm.
The query returns the current noise power across the carrier bandwidth in dBm.
Example
:DIG:DATA:INP:NOIS:POW:NOIS:CHAN 10DBM
The preceding example sets the power in the channel bandwidth to 10 dBm.
*RST Depends on model and options.
Key Entry Channel Noise Power
:DIGital:DATA:INPut:NOISe:POWer:NOISe:TOTal
Supported N5172B/82B with option 004
:DIGital:DATA:INPut:NOISe:POWer:NOISe:TOTal (value)
:DIGital:DATA:INPut:NOISe:POWer:NOISe:TOTal?
This command sets the current total noise power level if noise is on.
In the NOISe control mode, the total power will be adjusted to achieve the specified total noise
power and the total noise power level will be maintained regardless of changes to the other noise
parameters. A change to the total power will change the total noise power setting appropriately to
maintain the C/N ratio.
In the TOTal control mode, this will adjust the total power once for the specified total noise power
level, after which the total noise power could change if any noise parameters are adjusted or the
total power is adjusted.
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