LMR Master™ S412E Programming Manual : VNA Commands : :DISPlay Subsystem
 
:DISPlay Subsystem
This subsystem provides commands that modify the display of data for the user. They do not modify the way in which data are returned to the controller.
:DISPlay[:WINDow]:TRACe TRACe|MEMory|BOTH
:DISPlay[:WINDow]:TRACe?
Description
Sets the display type for the current active trace. Setting the display type to TRAC will display the trace only. Setting the display type to MEM will display the trace memory only. Setting the display type to BOTH will display both the trace and memory.
Cmd Parameter
<char> TRACe|MEMory|BOTH
Query Response
<char> TRAC|MEM|BOTH
Default Value
TRAC
Front Panel Access
Shift 5 (Trace), Display
:DISPlay[:WINDow]:TRACe:FORMat SINGle|DUAL|TRI|QUAD
:DISPlay[:WINDow]:TRACe:FORMat?
Description
Defines the display trace format. The query version of this command returns “SING” if the trace format is set to Single, “DUAL” if set to dual, “TRI” if set to Tri, and “QUAD” if set to Quad.
Syntax
:DISPlay[:WINDow]:TRACe:FORMat SINGle|DUAL|TRI|QUAD
:DISPlay[:WINDow]:TRACe:FORMat?
Cmd Parameter
<char> SINGle|DUAL|TRI|QUAD
Query Response
<char> SING|DUAL|TRI|QUAD
Default Value
QUAD
Example
To set the display trace format to Dual:
:DISPlay:TRACe:FORMat DUAL
Front Panel Access
Measure, Trace Format
:DISPlay[:WINDow]:TRACe:FORMat:FIELd <Measurement Type>
:DISPlay[:WINDow]:TRACe:FORMat:FIELd?
Description
Defines the measurement type for the current active trace. This command is valid only for Field mode with display type set to either single or dual. <Measurement Type> is the measurement type to which the specified trace is set, and it must be one of the following values:
VSWR for VSWR
RETLoss for Return Loss
CABLoss for Cable Loss
2PTGain for Insertion Loss
1PTPhase for 1-port Phase
2PTPhase for 2-port Phase
1PTSmith for 1-port Smith
DTFRetLoss for DTF Return Loss
DTFVswr for DTF VSWR
The query returns the short form of the measurement type of the active trace.
Syntax
:DISPlay[:WINDow]:TRACe:FORMat:FIELd <Measurement Type>
:DISPlay[:WINDow]:TRACe:FORMat:FIELd?
Cmd Parameter
<char> VSWR|RETLoss|CABLoss|2PTGain|1PTPhase|2PTPhase| 1PTSmith|DTFRetLoss|DTFVswr
Query Response
<char> VSWR|RETL|CABL|2PTG|1PTP|2PTP|1PTS|DTFR|DTFV
Example
To set the active trace measurement type to VSWR:
:DISP:TRAC:FORM:FIEL VSWR
Front Panel Access
Measure, Measurement Type
:DISPlay:WINDow:TRACe:Y[:SCALe]:BOTTom <value>
:DISPlay:WINDow:TRACe:Y[:SCALe]:BOTTom?
Description
Sets the display bottom value for the current active trace. Command is valid in field mode only.
Syntax
:DISPlay:WINDow:TRACe:Y[:SCALe]:BOTTom <value>
:DISPlay:WINDow:TRACe:Y[:SCALe]:BOTTom?
Cmd Parameter
<NR3> <value> (depends on display type)
Query Response
<NR3> <value> (depends on display type)
Default Value
Insertion Loss: 0 dB, Max 110, Min -110
VSWR: 101, Max 101, Min 1
1-Port Phase: 180°, Max 180°, Min -180°
2-Port Phase: 180°, Max 180°, Min -180°
Cable Loss: 0 dB, Max 30, Min -30
Return Loss: 0 dB, Max 110, Min -110
DTF Return Loss: 0 dB, Max 110, Min -110
DTF VSWR: 101, Max 101, Min 1
Note: Although these values are not used for 1 Port Smith Chart, when you query or set through SCPI, the instrument always returns a value. For Smith Chart, use:
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:SMCHart 0|10|20|
Default Unit
Current active value unit
Example
:DISPlay:WINDow:TRACe:Y:BOTTom 1
Front Panel Access
Scale, Bottom
:DISPlay:WINDow:TRACe:Y[:SCALe]:GDAPerture <integer>
:DISPlay:WINDow:TRACe:Y[:SCALe]:GDAPerture?
Description
Sets the Group Delay aperture value (which is common to all traces). The query version of this command produces the Group Delay aperture as its output.
Syntax
:DISPlay:WINDow:TRACe:Y[:SCALe]:GDAPerture <integer>
:DISPlay:WINDow:TRACe:Y[:SCALe]:GDAPerture?
Cmd Parameter
<NR1> <integer>
Query Response
<NR1> <integer>
Default Value
2
Range
2 to 20
Front Panel Access
Scale, Aperture
Note 
Graph type must be Group Delay in order to display the Aperture % soft key in the Scale menu.
:DISPlay:WINDow:TRACe:Y[:SCALe]:TOP <value>
:DISPlay:WINDow:TRACe:Y[:SCALe]:TOP?
Description
Sets the display top value for the current active trace. Command is valid in field mode only.
Syntax
:DISPlay:WINDow:TRACe:Y[:SCALe]:TOP <value>
:DISPlay:WINDow:TRACe:Y[:SCALe]:TOP?
Cmd Parameter
<NR3> <value> (depends on display type)
Query Response
<NR3> <value> (depends on display type)
Default Value
Insertion Loss: 0 dB, Max 110, Min -110
VSWR: 101, Max 101, Min 1
1-Port Phase: 180°, Max 180°, Min -180°
2-Port Phase: 180°, Max 180°, Min -180°
Cable Loss: 0 dB, Max 30, Min -30
Return Loss: 0 dB, Max 110, Min -110
DTF Return Loss: 0 dB, Max 110, Min -110
DTF VSWR: 101, Max 101, Min 1
Note: Although these values are not used for 1 Port Smith Chart, when you query or set through SCPI, the instrument always returns a value. For Smith Chart, use:
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:SMCHart 0|10|20|
Default Unit
Current active value unit
Example
To set the 1-Port Phase top to 90 degrees:
:DISP:WIND:TRACe:Y:TOP 90
To set VSWR to 50 degrees:
:DISP:WIND:TRACe:Y:TOP 50
Front Panel Access
Scale, Top
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:PDIVision <value>
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:PDIVision?
Description
Sets the scale per division for the y‑axis. For Group Delay, sets the scale (time/division) for the y‑axis. For Phase, sets the scale (degree/division) for the y‑axis. For Log Magnitude and Log Mag/2, sets the scale (dB/division) for the y‑axis. For all other measurements, the y‑axis is unitless. <Tr> is the trace number in the range 1 to 4. If no trace number is specified, then the <Tr> parameter defaults to trace number 1.
Cmd Parameter
<NRf> <value> (depends on display type)
Query Response
<NR3> <value> (depends on display type)
Default Value
Log Magnitude: 10 dB
Phase: 45 °
SWR: 1
Group Delay: 1 ns
Real: 0.2
Imag: 0.2
Log Mag / 2: 10 dB
Smith Chart: 10
Log Polar: 10 dB
Linear Polar: 0.2
Real Impedance: 10 ohm
Imaginary Impedance: 10 ohm
Default Unit
Current active value unit (For time, the default for setting is seconds, but the query is always returned in nanoseconds (ns).)
Range
Log Magnitude: 0.05 dB to 40 dB
Phase: 0.1 ° to 90 °
SWR: 0.001 to 10
Group Delay: 1 ps to 260 ns
Real: 0.01 to 260
Imag: 0.01 to 260
Log Mag / 2: 0.05 dB to 40 dB
Smith Chart: 1 to 260
Log Polar: 0.05 dB to 40 dB
Linear Polar: 0.001 to 26
Real Impedance: 0.01 ohm to 260 ohm
Imaginary Impedance: 0.01 ohm to 260 ohm
Note 
Although these values are not used for Smith Chart, when you query or set through SCPI, the instrument always returns a value. For Smith Chart, use
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:SMCHart 0|10|20|30|– 3
Front Panel Access
Scale, Resolution Per Div
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:RLEVel <value>
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:RLEVel?
Description
Sets the reference level scale value for the y‑axis. <Tr> is the trace number in the range 1 to 4. If no trace number is specified, then the <Tr> parameter defaults to trace number 1.
Cmd Parameter
<NR3> <value> (depends on display type)
Query Response
<NR3> <value> (depends on display type)
Default Value
Log Magnitude: 0 dB
SWR: 1
Phase: 0 °
Group Delay: 0 ps
Real: 0
Imag: 0
Log Mag / 2: 0 dB
Smith Chart: 10
Log Polar: 0 dB
Linear Polar: 1
Real Impedance: 50 ohm
Imaginary Impedance: 0 ohm
Default Unit
Current active value unit (For time, the default for setting is seconds, but the query is always returned in nanoseconds (ns).)
Range
Log Magnitude: – 120 dB to + 120 dB
SWR: 1 to 10
Phase: – 180 ° to + 180 °
Group Delay: 0 ps to 260 ns
Real: – 10000 to + 10000
Imag: – 10000 to + 10000
Log Mag / 2: – 120 dB to + 120 dB
Smith Chart: 1 to 260
Log Polar: – 120 dB to + 120 dB
Linear Polar: 0.005 to 130
Real Impedance: – 100000 ohm to + 1000000 ohm
Imaginary Impedance: – 100000 ohm to + 1000000 ohm
Note 
Although these values are not used for Smith Chart, when you query or set through SCPI, the instrument always returns a value. For Smith Chart, use
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:SMCHart 0|10|20|30|– 3
Related Command
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:RPOSition
Front Panel Access
Scale, Reference Value
 
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:RPOSition <integer>
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:RPOSition?
Description
Sets the reference line scale value for the y‑axis.
Cmd Parameter
<NR1> <integer>
Query Response
<NR1> <integer>
Default Value
Log Magnitude: 9
SWR: 1
Phase:  5
Group Delay: 5
Real: 5
Imag: 5
Log Mag / 2: 9
Smith Chart: 10
Real Impedance: 5 ohm
Imaginary Impedance: 5 ohm
Range
Log Magnitude: 0 to 10
SWR: 0 to 10
Phase: 0 to 8
Group Delay: 0 to 10
Real: 0 to 10
Imag: 0 to 10
Log Mag / 2: 0 to 10
Smith Chart: 0 to 10
Real Impedance: 0 ohm to 10 ohm
Imaginary Impedance: 0 ohm to 10 ohm
Note 
Although these values are not used for Smith Chart, when you query or set through SCPI, the instrument always returns a value. For Smith Chart, use
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:SMCHart 0|10|20|30|– 3
Related Command
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:RLEVel
Front Panel Access
Scale, Reference Line
 
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:SMCHart 0|10|20|30|-3
:DISPlay:WINDow:TRACe<Tr>:Y[:SCALe]:SMCHart?
Description
Sets the Smith chart display scale type of the given trace number specified by <Tr>. <Tr> is the trace number in the range 1 to 4. If no trace number is specified, then the <Tr> parameter defaults to trace number 1. Setting the value to 0 is equivalent of setting the Smith Chart scale to “Normal” on the front panel. Setting the value to 10 is equivalent of setting the Smith Chart scale to “Expand 10 dB” on the front panel. Setting the value to 20 is equivalent of setting the Smith Chart scale to “Expand 20 dB” on the front panel. Setting the value to 30 is equivalent of setting the Smith Chart scale to “Expand 30 dB” on the front panel. Setting the value to – 3 is equivalent of setting the Smith Chart scale to “Compress 3 dB” on the front panel.
Cmd Parameter
<char> 0|10|20|30|-3
Query Response
<char> 0|10|20|30|-3
Default Value
0 (Normal)
Front Panel Access
Scale