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 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.

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85330A Multiple Channel Controller

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Agilent Technologies service manual Rear Panel Features, 85330A Rear Panel Connectors