Boonton 4540 Peak Power Meter User Manual - Manual (Page 87)

Boonton 4540 Series RF Power Meter
Operation 4-39
4.5.22 Channel > Extensions Pg 2 > Alarms Menu (Statistical Mode)
The Alarms menu provides controls for enabling alarms and adjusting alarm limits (trip points). Controls the power limit
alarm operation. When alarm operation is enabled, the ―primary measurement‖(average power in CW or Modulated modes,
average power between markers in Pulse mode) is monitored, and compared to preset upper and lower power limits. If the
power is beyond either of these limits, a red-filled up
▲ or down ▼ arrow will appear in the main text (Modulated mode)
display above the units to indicate an out-of-limit measurement. After an alarm condition has happened, an outline of an
arrow will remain. The arrow indicators can be cleared by changing the limit level or changing the type of alarm enabled.
Remote interface flags are set to save a trip condition even if the power has returned to within the normal limits. The Multi-
IO can also be set to output TTL high if an alarm condition exists.
Main > Channel > Channel 1 | 2 > Extensions Pg 2 > Alarms > Enable
Description: Set the alarm system state for the selected channel.
When the lower alarm, high alarm, or both is selected,
the measured average power is compared to the
applicable preset power limit, and an error flag is set if
out of range. When it is OFF, no action occurs if the
power is out of range.
Menu Type: Selection.
Choices: Off, Both, Hi Alarm, Low Alarm
SCPI Commands: CALCulate[1|2]:LIMit:UPPer:STATe <Boolean>
CALCulate[1|2]:LIMit:LOWer:STATe <Boolean>
CALCulate[1|2]:LIMit[:BOTH]:STATe <Boolean>
Main > Channel > Channel 1 | 2 > Extensions Pg 2 > Alarms > High Limit
Description: Set the upper limit power level for the selected channel.
When the measured average power is above the upper
limit, an up arrow
▲
will appear on the display above
the units on the main text screen in modulated mode,
and flag bits are set in the remote mode alarm register.
Menu Type: Numeric value.
Range: -300.000 to 300.000 dBm
SCPI Command: CALCulate[1|2]:LIMit:UPPer[:POWer]
<numeric_value>
Fig. 4-33 Alarms Menu