Boonton 4500B Peak Power Meter - Manual (Page 294)

Boonton 4500B RF Peak Power Analyzer
Remote Operation 5-94
TRIGger:LEVel
Description: Set or return the trigger level for synchronizing data acquisition with a pulsed input signal or
external trigger pulses. The internal trigger level entered should include any global offset and will
also be affected by the frequency Cal-factor. The available internal trigger level range is sensor
dependent. For internal trigger, the trigger level is set and returned in channel units. The external
trigger has two ranges, 5 and 50 volts. Note that there is a small amount of hysteresis built into
the trigger system, and the signal should have at least one dB greater swing in each direction past
the trigger level setting, and somewhat more at low levels. Note that explicitly setting the trigger
level while TRIGger:MODE is set to AUTOPKPK will cancel the AUTOPKPK setting, and force
the trigger mode back to AUTO. In AUTOPKPK the Trigger Level menu will display ―AUTO
LEVEL‖.
Syntax: TRIGger:LEVel <n>
Argument: <n> = -39.9 to +20 dBm (plus offset, if any) (internal trigger)
<n> = 5.0 volts or 50 volts (external trigger)
Valid Modes: Pulse, Statistical (gated) and Modulated (triggered) modes only
TRIGger:MODE
Description: Set or return the trigger mode for synchronizing data acquisition with pulsed signals. NORM
mode will cause a sweep to be triggered each time the power level crosses the preset trigger level
in the direction specified by TRIGger:SLOPe. If there are no edges that cross this level, no data
acquisition will occur. AUTO mode operates in much the same way as NORM mode, but will
automatically generate a trace if no trigger edges are detected for a period of time (100 to 500
milliseconds, depending on timebase). This will keep the trace updating even if the pulse edges
stop. The AUTOPKPK mode operates the same as AUTO mode, but will adjust the trigger level
to halfway between the highest and lowest power or voltage levels detected. This aids in
maintaining synchronization with a pulse signal of varying level. Note that a setting of PKTOPK
will be overridden and forced back to AUTO if a TRIGger:LEVel is set. The FREERUN mode
force traces at a high rate to assist in locating the signal.
Syntax: TRIGger:MODE <asc>
Argument: <asc> = {AUTO, AUTOPKPK, NORMAL, FREERUN}
Valid Modes: Pulse and gated Statistical modes only
TRIGger:MODUlated:MODE
Description: Set or return the trigger mode for Modulated signals. The normal mode is FREERUN, which
results in continuous data acquisition. The TRIGGERED mode is used to start data acquisition
when the trigger level and slope conditions are met. After a single start event, data is acquired
continuously until stopped.
Syntax: TRIGger:MODUlated:MODE <asc>
Argument: <asc> = {FREERUN, TRIGGERED}
Valid Modes: Modulated mode only.