In the bistable mode the channel is triggered or 'set' and remains in that state until 'reset' by the negative NIM compatible "RESET" input or the "RESET" pushbutton. The "TRIGGER" and "OR" inputs are inhibited from 'setting' the channel when "RESET" is at logic '1'. The "RESET" I/P is enabled only in the bistable mode. "INHIBIT" is a negative NIM compatible input. All outputs are forced to their quiescent state whenever "INHIBIT" is logic '1'. "GATE" transitions resulting from "INHIBIT" do not generate "DELAY" outputs.

A special feature of the Model 794 is the analog "PROGRAMMING" input. Enabled by program jumpers, each input accepts 0 to +10 Volt levels and produces a 5% to 105% adjustment of the selected range. The analog voltage is received differentially to relieve the noise and common mode offsets associated with long cable runs.

OUTPUT DESCRIPTION

Each channel has five (5) outputs. "GATE", "GATE', and "DELAY" are negative NIM current source outputs governed by the trigger rules described above. "TTL" is a TTL com- patible output which can be assigned to either the "GATE" or "DELAY" function. A second jumper associated with TTL provides a 'true' or 'complement' feature. "ECL" is a differential ECL output conforming to CERN note EP 79-01 and is jumper programmed to be identical to either "GATE" or "DELAY".

BIN GATE DESCRIPTION

The model 794 is capable of driving the 'bin gate' of the host bin. A switch mounted on the rear panel enables or disables the "BIN GATE" feature. Individual channels are selected to supply this gate signal via program jumpers. More than one channel may be selected resulting in a '.bin gate' which is the logical OR of the selected channels.

MANUAL CONTROL SUMMARY Range Switch
A ten position rotary switch selects one of eight 'full scale' times for the 'monostable' mode. The remaining two positions are for 'bistable' mode. RANGE positions are: 1 uSec, 10 uSec, 0.1 mSec, 1 mSec, 10 mSec, 0.1 Sec, 10 Sec, FF and FF.

Trigger Pushbutton
Provides a manual 'trigger' function. 'Single trigger' mode is implemented by pressing and releasing in less than 0.5 seconds. 'Retrigger' mode is implemented pressing and holding for more than 0.5 seconds. Reset Pushbutton
Provides a manual 'reset' function.

Time Vernier Potentiometer
Adjusts the monostable time-base form approximately 5.0% to 105.0% of the selected range in 'local' programming mode. The potentiometer is disable in 'remote, programming and 'bistable' modes.

Delay Width
Adjusts the width of the delay output from 10 nSec to 100 nSec.