VNA Master™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 changes 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)
Range
5 kHz to 20 GHz for MS2028C, MS2038C
5 kHz to 15 GHz for MS2027C, MS2037C
5 kHz to 6 GHz for MS2026C, MS2036C
Default Value
10000002500 Hz for MS2028C, MS2038C
7500002500 Hz for MS2027C, MS2037C
3000002500 Hz for MS2026C, MS2036C
Default Unit
Hz
Front Panel Access
Freq/Time/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 changes 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)
Range
0 Hz to 19999995000 Hz for MS2028C, MS2038C
0 Hz to 14999995000 Hz for MS2027C, MS2037C
0 Hz to 5999995000 GHz for MS2026C, MS2036C
Default Value
19999995000 Hz for MS2028C, MS2038C
14999995000 Hz for MS2027C, MS2037C
5999995000 Hz for MS2026C, MS2036C
Default Unit
Hz
Front Panel Access
Freq/Time/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.
Note 
The span returned by this command is for the Transmission response. The span for Reflection response is half of this value.
Syntax
[:SENSe]:FREQuency:DSPAn?
Cmd Parameter
NA (query only)
Query Response
<NR3> <freq> (hertz)
Default Unit
Hz
Front Panel Access
Freq/Time/Dist, Additional Dist Setup, Distance Info
Time Suggested Frequency Span
[:SENSe]:FREQuency:TSPAn?
Description
This command returns the suggested frequency span based on the start and stop time.
Note 
The span returned by this command is for the Transmission or the Reflection (Round‑Trip) response. The span for Reflection (One‑Way) response is half of this value.
Syntax
[:SENSe]:FREQuency:TSPAn?
Cmd Parameter
NA (query only)
Query Response
<NR3> <freq> (hertz)
Default Unit
Hz
Front Panel Access
Freq/Time/Dist, Time Info
 
Start Frequency
[:SENSe]:FREQuency:STARt
Description
Sets the start frequency. Note that changing the value of the start frequency also changes 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)
Range
5 kHz to 20 GHz for MS2028C, MS2038C
5 kHz to 15 GHz for MS2027C, MS2037C
5 kHz to 6 GHz for MS2026C, MS2036C
Default Value
5000 Hz
Default Unit
Hz
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/Time/Dist (or Freq), Start Freq
 
Stop Frequency
[:SENSe]:FREQuency:STOP
Description
Sets the stop frequency. Note that changing the value of the stop frequency changes 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)
Range
5 kHz to 20 GHz for MS2028C, MS2038C
5 kHz to 15 GHz for MS2027C, MS2037C
5 kHz to 6 GHz for MS2026C, MS2036C
Default Value
20000000000 Hz for MS2028C, MS2038C
15000000000 Hz for MS2027C, MS2037C
6000000000 Hz for MS2026C, MS2036C
Default Unit
Hz
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/Time/Dist (or Freq), Stop Freq
 
Get Frequency List
:SENSe<Tr>:FREQuency:DATA?
Description
Producers 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 Unit
Hz
Related Command
:CALCulate<Tr>:TRANsform:TIME:DATA?
:CALCulate<Tr>:TRANsform:DISTance:DATA?
Front Panel Access
NA