Agilent Technologies Multiple Channel Controller 85330A - Manual (Page 62)

4-12 85330A Multiple Channel Controller
General Information
Rear Panel Features
Rear Panel Features
Figure 4-2 85330A Rear Panel Connectors
EVENT TRIG
By default, this input accepts a positive or negative-edge TTL trigger from
the positioner controller or other device. The default is positive-edge
triggering. The trigger signal initiates a measurement sequence. Connect
EVENT TRIG to the positioner controller or other TTL trigger source.
You can configure the 85330A so it responds to a negative-edge TTL trigger
signal. Refer to
Chapter 1, “Installation,” for instructions.
MEAS BUSY
Goes TTL HIGH when the EVENT TRIG line is asserted. This line stays
HIGH during the measurement sequence, going LOW after the measurement
sequence is finished. This line is designed to tell external control logic when
the measurement system is busy, and using it is optional.
RCVR TRIG
Sends a 2 to 3 µ s negative-edge pulse to the EVENT TRIGGER input of the
receiver. This causes the receiver to acquire data. The number of parameters
measured by a single trigger pulse is determined by how the receiver
measurement controls are set up. A single parameter (radioed measurement
point) is taken in the FASC, FASD, FASAD (Fast Data Acquisition) modes,
and multiple parameters are measured if you are using the FASMUX mode.