Boonton 4530 Peak Power Meter User Manual - Manual (Page 53)

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Boonton Electronics Chapter 3
4530 Series RF Power Meter Operation
Horizontal Horizontal markers appear as horizontal bars, and measure the percent at a particu-
lar power level in Statistical mode. Horizontal markers may also be used in Pulse
mode graph display as “reference lines”, to indicate certain power levels. In this
case they are strictly visual tools, and no marker measurements can be performed.
Remote Command: MARKer:MODe <OFF, VERT, HORZ>
Main Menu > Markers > [Mrk1 Pos, Mrk2 Pos]
Sets the position of Marker 1 or Marker 2. The function and parameter range for this menu item are dependent
on marker mode and measurement mode.
Vertical Markers, Pulse Mode: Sets the marker position in time relative to the trigger. Note that time markers
must be positioned within the time limits of the trace window in the graph display. If any attempt is
made to position them outside these limits, they will be forced back into the range of the trace
window. Note that if timespan, trigger delay, or trigger position settings are changed, the marker
positions on the graph display will remain unchanged, but their times relative to the trigger will
change. For this reason, it is a good idea to set all timing and trigger parameters before setting the
marker times. Time limits are: TrigDly - (TimeSpan / 2) < MarkerTime < TrigDly + (TimeSpan / 2).
Vertical Markers, Statistical Mode: Sets the marker position in percent probability. Note that the power
value returned for each marker will depend on the setting of CALCulate:MODe . When set to CDF,
the highest power levels are towards the right side of the screen, with maximum (highest peak) power
occurring at 100%. For CCDF (1-CDF), the highest levels are towards the left, with peak power at 0%.
Horizontal Markers: Sets the marker position in absolute power. Note that horizontal markers may be
positioned at any power level, regardless of the vertical span setting, and will not necessarily appear
on the graph display.
Range: -150.0 to 150.0 sec (Vert Markers, Pulse Mode - see restrictions above)
0.000 to 100.000 % (Vertical Markers, Statistical Mode)
-99.99 to +99.99 dBm (Horizontal Markers)
Remote Command: MARKer:POSition[1|2]:TIMe <n> (Vertical Markers, Pulse Mode)
MARKer:POSition[1|2]:PERcent <n> (Vertical Markers, Statistical Mode)
MARKer:POSition[1|2]:POWer <n> (Horizontal Markers)
3.11.4 Trig/Time Menu
The Trig/Time menu is used to configure trigger and timing settings for time domain measurements. In pulse
mode, the timebase and trigger settings are very similar to those of a digital storage oscilloscope for a familiar
operating feel. They control selection of hardware trigger source and polarity, setting a trigger level, config-
uring delay and holdoff timing, and setting the trigger position on the display. The Time Span setting also
controls the graph mode display for Modulated and CW modes, although it has no effect on the measurement.
Main Menu > Trig/Time > TimeSpan
Select the horizontal time span of the display for Pulse, CW and Modulated modes. The 4530 has fixed
timespan settings in a 1-2-5 sequence. Note that trigger delay and holdoff settings are restricted to certain
values based on the timespan setting, and marker positions must always fall within the trace window. It is
always a good idea to set the timespan before setting any other parameters when in Pulse mode. In CW or
Modulated mode, this setting affects the display only, and has no effect on the measurement.
Range: 2.5e-6 to 5.0 seconds (Pulse), 1.0 to 3600 seconds (CW, Modulated)
Default: 0.001 second (Pulse), 1 second (CW, Modulated)
Remote Command: DISPlay:TSPAN <n>