VNA Masterâ„¢Programming Manual : VNA Commands : [:SENSe]:FREQuency Subsystem
 
[:SENSe]:FREQuency Subsystem
Commands in this subsystem pertain to the frequency settings of the instrument.
 
Center Frequency
[:SENSe]:FREQuency:CENTer
Description
Sets the center frequency. Note that changing the value of the center frequency will change the value of the coupled parameters: Start Frequency and Stop Frequency. It may also change the value of the span.
Syntax
[:SENSe]:FREQuency:CENTer <freq>
[:SENSe]:FREQuency:CENTer?
Cmd Parameter
<NRf> <freq> (hertz)
Query Response
<NR3> <freq> (hertz)
Default Value
2000250000 Hz for MS2024B, MS2034B
3000250000 Hz for MS2025B, MS2035B
Default Units
Hz
Range
500 kHz to 4 GHz for MS2024B, MS2034B
500 kHz to 6 GHz for MS2025B, MS2035B
Front Panel Access
Freq/Dist (or Freq), Center Freq
 
Frequency Span
[:SENSe]:FREQuency:SPAN
Description
Sets the frequency span. Setting the value of <freq> to 0 Hz is the equivalent of setting the span mode to zero span. Note that changing the value of the frequency span will change the value of coupled parameters: Start Frequency and Stop Frequency, and may change the Center Frequency.
Syntax
[:SENSe]:FREQuency:SPAN <freq>
[:SENSe]:FREQuency:SPAN?
Cmd Parameter
<NRf> <freq> (hertz)
Query Response
<NR3> <freq> (hertz)
Default Value
3999500000 Hz for MS2024B, MS2034B
5999500000 Hz for MS2025B, MS2035B
Default Units
Hz
Range
0 Hz to 3.999500 GHz for MS2024B, MS2034B
0 Hz to 5.999500 GHz for MS2025B, MS2035B
Front Panel Access
Freq/Dist (or Freq), Span
 
Distance Suggested Frequency Span
[:SENSe]:FREQuency:DSPAn?
Description
This command returns the suggested frequency span based on the start and stop distance.
Syntax
[:SENSe]:FREQuency:DSPAn?
Cmd Parameter
NA (query only)
Query Response
<NR3> <freq> (hertz)
Default Value
At preset, DSpan is 1999750000 Hz for MS2024B, MS2034B
At preset, DSpan is 2999750000 Hz for MS2025B, MS2035B
Default Units
Hz
Range
0 Hz to 1.999750000 GHz for MS2024B, MS2034B
0 Hz to 2.999750000 GHz for MS2025B, MS2035B
Front Panel Access
Freq/Dist, Additional Dist Setup, Distance Info
 
Start Frequency
[:SENSe]:FREQuency:STARt
Description
Sets the start frequency. Note that changing the value of the start frequency will also change the value of coupled parameters: Center Frequency and Span.
Syntax
[:SENSe]:FREQuency:STARt <freq>
[:SENSe]:FREQuency:STARt?
Cmd Parameter
<NRf> <freq> (hertz)
Query Response
<NR3> <freq> (hertz)
Default Value
500000 Hz for all 4 models
Default Units
Hz
Range
500 kHz to 4 GHz for MS2024B, MS2034B
500 kHz to 6 GHz for MS2025B, MS2035B
Example
Sets the start frequency to 10000 HZ:
:SENSe:FREQuency:STARt 10000
Sets the start frequency to 5 MHz:
:SENSe:FREQuency:STARt 5MHZ
Sets the start frequency to 1 GHz:
:SENS:FREQ:STAR 1GHZ
Front Panel Access
Freq/Dist (or Freq), Start Freq
 
Stop Frequency
[:SENSe]:FREQuency:STOP
Description
Sets the stop frequency. Note that changing the value of the stop frequency will change the value of coupled parameters: Center Frequency and Span.
Syntax
[:SENSe]:FREQuency:STOP <freq>
[:SENSe]:FREQuency:STOP?
Cmd Parameter
<NRf> <freq> (hertz)
Query Response
<NR3> <freq> (hertz)
Default Value
4000000000 Hz for MS2024B, MS2034B
6000000000 Hz for MS2025B, MS2035B
Default Units
Hz
Range
500 kHz to 4 GHz for MS2024B, MS2034B
500 kHz to 6 GHz for MS2025B, MS2035B
Example
Sets the stop frequency to 10000 Hz:
:SENSe:FREQuency:STOP 10000
Sets the stop frequency to 5 MHz:
:SENSe:FREQuency:STOP 5MHZ
Sets the stop frequency to 1 GHz:
:SENS:FREQ:STOP 1GHZ
Front Panel Access
Freq/Dist (or Freq), Stop Freq
 
Get Frequency List
:SENSe<Tr>:FREQuency:DATA?
Description
Produces the frequency list in Hz for the given trace. <Tr> is the trace number in the range 1 to 8 (1 to 4 for Traces TR1 to TR4 and 5 to 8 for Memory M1 to M4). If no trace number is specified, then the <Tr> parameter defaults to trace number 1. The response begins with an ASCII header that specifies the number of data bytes. It appears in the format #AX, where A is the number of digits in X, and X is the number of bytes that follow the header. Each frequency point is in scientific notation and separated by a comma delimiter.
Syntax
:SENSe<Tr>:FREQuency:DATA?
Cmd Parameter
NA (query only)
Query Response
<char> <freq> (returns block data in hertz)
Default Units
Hz
Related Command
:CALCulate<Tr>:TRANsform:DISTance:DATA?
Front Panel Access
NA