256 Agilent X-Series Signal Generators SCPI Command Reference
Arb Commands
Dmodulation Subsystem–N5172B/82B with Option 431 ([:SOURce]:RADio:DMODulation:ARB)
Key Entry I Gain
:MPOLarity:MARKer1|2|3|4
Supported N5172B/82B with Option 431
[:SOURce]:RADio:DMODulation:ARB:MPOLarity:MARker1|2|3|4 NEGative|POSitive
[:SOURce]:RADio:DMODulation:ARB:MPOLarity:MARKer1|2|3|4?
This command sets the polarity for the selected marker. For a positive marker polarity, the marker
signal is high during the marker points. For a negative marker polarity, the marker signal is high
during the period of no marker points.
*RST POS
:NOISe:BANDwidth
Supported N5172B/82B with Option 431 and 403
[:SOURce]:RADio:DMODulation:ARB:NOISe:BANDwidth <value><unit>
[:SOURce]:RADio:DMODulation:ARB:NOISe:BANDwidth?
This command selects the flat noise bandwidth value of the real–time noise for an ARB waveform.
Typically, this value is set slightly wider than the carrier bandwidth.
*RST +1.00000000E+000
Key Entry Noise Bandwidth
:NOISe:CBRate
Supported N5172B/82B with Option 431 and 403
[:SOURce]:RADio:DMODulation:ARB:NOISe:CBRate <1bps - 999Mbps>
[:SOURce]:RADio:DMODulation: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
. For DMODulation
(ARB Custom) 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.
Example
Key Entry Marker 1 Polarity Neg Pos Marker 2 Polarity Neg Pos Marker 3 Polarity Neg Pos
Marker 4 Polarity Neg Pos
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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