380 Agilent X-Series Signal Generators SCPI Command Reference
Real–Time Commands
Custom Subsystem–Option 431([:SOURce]:RADio:CUSTom)
:BBT
Supported N5172B/82B with Option 431
[:SOURce]:RADio:CUSTom:BBT <val>
[:SOURce]:RADio:CUSTom:BBT?
This command changes the bandwidth- multiplied- by- bit- time (BbT) filter parameter.
The filter BbT value can be set to the maximum level (1) or in between the minimum level (0.100)
and maximum level by using fractional numeric values (0.101–0.999).
*RST
+5.00000000E001
Range 0.100–1.000
Key Entry Filter BbT
Remarks This command is effective only after choosing a Gaussian filter. It does not have an
effect on other types of filters.
To change the current filter type, refer to “:FILTer” on page 388.
:BRATe
Supported N5172B/82B with Option 431
[:SOURce]:RADio:CUSTom:BRATe <val>
[:SOURce]:RADio:CUSTom:BRATe?
This command sets the bit rate in bits per second (bps–Mbps). The maximum bit rate depends on the
modulation type as shown in the following tables.
The IQ digital data stream is shaped by a FIR filter.
To change the modulation type, refer to “:MODulation[:TYPE]” on page 392.
When the bit rate is changed, the signal generator reconfigures the baseband generator. The time
required to reconfigure the baseband generator is inversely proportional to the bit rate: lower bit
rates require more time.
*RST
+2.00000000E+006
The following table lists the range for PRAM or external serial data in the Custom format.
Range
Bits/Symbo
l
Min Bit
Rate
N5172B Opt
653
Max Bit Rate
N5172B Opt
655
Max Bit Rate
N5182B Opt
656
Max Bit Rate
N5182B Opt
657
Max Bit Rate
1 1 bps 37.5 Mbps 50 Mbps 50 Mbps 50 Mbps
2 2 bps 37.5 Mbps 50 Mbps 50 Mbps 50 Mbps
3 3 bps 37.5 Mbps 50 Mbps 50 Mbps 50 Mbps
4 4 bps 37.5 Mbps 50 Mbps 50 Mbps 50 Mbps