3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
Turn on Marker 1 as a band density marker:
:CALC:MARK:FUNC BDEN
Turn off marker functions for Marker 1:
:CALC:MARK:FUNC OFF
Return the current band function for marker 1. For Marker Noise, returns NOIS, for Band Power
returns BPOW, and for Band Density returns BDEN:
:CALC:MARK:FUNC?
Return the y-axis value of marker 1, which means it returns the Band Function value if a Band Function
is on for Marker 1. Note that the delta value when the Y axis unit is Watts is the square of the delta
value when the Y axis unit is Volts. For example, when the percent ratio with Y axis unit in Volt is 0.2,
the percent ratio with Y axis unit in Watt is 0.22 = 0.04. When you read the value out remotely, you
must know whether your Y Axis Unit is log (dB), linear (V or A), or power (W)
:CALC:MARK:Y?
Notes The zero-width case and the case of a width less than .499 buckets is treated as one bucket wide
although it shows a width of 0
When the trace the marker is on crosses domains, the width crosses domains as well, to remain the
same percentage of the traceSending this command selects the specifies marker
The marker function result is queried in the same way as the Marker Result, as outlined in the Marker
section, with :CALC:MARK:Y?
Dependencies Fixed markers: It is not possible to change the Band Function for a Fixed marker; so, the Band
Function selections are grayed-out for a Fixed marker
If a marker function was already on when the marker became Fixed, then the selected Band Function
is shown but cannot be changed. Therefore, you cannot directly set the X or Y value of a Fixed marker
that has a marker function turned on. To turn off the function, turn off the marker
Average detector and Power Averaging are auto selected when Marker Noise on
If the selected (specified) marker is Off, selecting Marker Noise via front panel or SCPI turns the
marker on
Couplings When you choose any Band Function and Band Span Auto/Man is in the Auto state, the Band Span is
set to 5% of the screen width
Adjusting the Band Span sets Band Span Auto/Man to Man
While in Marker Noise and with Band Span Auto/Man in the Auto state, if the analyzer Span is
changed, Band Span stays at 5% of the new span
If the selected (specified) marker is off, selecting a Band Function via front panel or SCPI turns the
marker on
If the detector mode for the detector on the marker’s trace is set to Auto, the AVERage detector is
selected. If the Average type is set to Auto, Power Averaging is selected. Other choices for the
detector or Average type may cause measurement inaccuracy
Preset
OFF
State Saved The band function for each marker is saved in instrument state
Annunciation The band function for the selected marker appears in the Marker Result block and in the Marker Table
Spectrum Analyzer Mode User's &Programmer's Reference 343
To Next Page
Loading...
Need help?
General
