Giga-tronics 58542 - Instrument Triggering; Figure 2-7: Trigger Subsystem Command Tree

Operation
Publication 21555, Rev. E, September 2002 2-21
2.5.14 Instrument Triggering
■ *TRG
■ TRIGger[:IMMediate]
■ TRIGger:SOURce
■ TRIGger:MODE
■ TRIGger:DELay
■ TRIGger:COUNt
■ INITiate:CONTinuous
■ INITiate[:IMMediate]
■ *WAI
These SCPI commands trigger the measurement cycle. They do not configure or provide triggering for
Peak Power Sensors. Those commands are defined in Section 2.5.19. For power meter operation, the
TRIGger Subsystem is divided into two sections; Instrument Measurement Event Triggering, and
Special Triggering Configuration commands for the fast reading buffered data, Burst, and Swift modes.
EXT triggering is performed with the rear panel BNC connector and functions only in the BURSt and
SWIFt Modes. EXT triggering is not available in the NORMal Mode. Provision has been made for a
hardware ready for new trigger type handshaking capability using the analog output.
BUS triggering is available for all operating modes, BURSt, SWIFt and NORMal.
IMMediate triggering allows the 58542 to free run and perform continuous measurements. This is the
default setting. To INITiate on IMMediate to increase measurement speed. During Normal Mode, with
both of these controls set to IMM, power measurements can be read with MEAS, READ, or FETCh.
IMMediate triggering is not compatible with the BURSt Mode. To send the CALC#:MODE BURS
command to enter the BURSt Mode, IMM instrument triggering for NORMal Mode will automatically
be switched to TRIG:SOUR BUS. To send the CALC#: MODE SWIF command to enter the SWIFt
Mode, IMM instrument triggering will remain IMM but a device-specific error will be generated
whenever specifying a TRIG:COUN# higher than 1.
Figure 2-7: TRIGger Subsystem Command Tree