GORMAN-REDLICH MANUFACTURING
257 WEST UNION STREET
ATHENS, OH 45701



EAS ENCODER/DECODER REAR PANEL TERMINAL DESCRIPTION


DECODER      1/14/97			Description

Term. Label

1-12  Audio In-Monitors #1...#6		Six pairs of audio inputs are each coupled to the 			
					decoder by 600 ohm to 600 ohm isolation 				
					transformers. These six audio sources are 				
					scanned for EAS alert messages.


13-14 Audio Out - 600 Ohm Sel.		Balanced 600 ohm continuous audio output from 			
					an operator selected monitor input channel 				
					#1 - #6.

15-16 Audio Out - 8 ohm sel.		Balanced 8 ohm continuous audio output from 			
					an operator selected monitor input channel 				
					#1 - #6. This will be the same audio as on 13-14.

17-18  Audio Out - 600 Ohm Alert		Balanced 600 ohm audio output from the 				
					channel carrying the alert message.  This 				
					output is gated on when the alert takes place.

19-22 Control Out - Alert			Two contact closure outputs can be used 
*					to signal remote control equipment, 			
					automation equipment or to activate a			
					remote bell or lamp.  If one of the				
					contact closures goes to automation, do 			
					not put any other circuits on this 				
					set of contacts.  This relay energizes 			
					for 1 second when an incoming 				
					message EOM is completed.




ENCODER


Term. Label					Description

23-24 Console Muting			These terminals allow console muting of the					
				panel speaker when the unit is installed in 					
				an on/air room

25-32 Audio IN/OUT - Prgm A/B	Eight terminals for balanced 600 ohm 					
				stereo program audio lines. Via these					
				inputs and outputs, the encoder interrupts 					
				the program audio to insert the alert message.

			
33-34 Control Out - Send Alert		Contact closure which can complete the
*			circuit for an external relay coil for a coaxial
			relay during the time the encoder is sending
			an alert signal. This will allow a low
			impedance (600 ohm) coaxial alert feed directly into
			a transmitter exciter circuit, thus bypassing all audio
			processing. It can also be used to energize
			an external relay to interrupt the program audio on an 
			AM transmitter.

35-36 Control Out - EAS Complete	One second contact closure output to signal 		  		
*				automation equipment that the EAS 						
				interruption is completed.

37-38 Control In - Delete Audio		A momentary contact closure input for deleting the 
				853/960 attention signal and the audio message portion of 				
				a received alert message.  The encoder will send only the				
				FSK (frequency shift keying) header and EOM (end of 				
				message) portions. The momentary contact closure would 				
				be supplied by remote switch or remote control 
				equipment contacts.

39-40 Control In - Send Alert		A momentary contact closure input to tell encoder to 
				send a stored  alert message now.


41-42 Control In - Manual			A momentary contact closure input to switch the encoder				
				from automatic to manual control.  You must wait for a 5 				
				second delay, if you want to toggle back and forth.

43-44 Control In - EOM			A momentary contact closure input to remotely send EOM 				
				(end of message). FSK CODE

45-46 Control In - RWT			A momentary contact closure input to remotely send RWT 				
				(require weekly test). FSK header code and FSK EOM code.

47-48 Control In - RMT			A momentary contact closure input to remotely send RMT
				(required monthly test). FSK header code and dual tones.
			
49-50 Data In/Out - RS485 		Serial data option for future remote control equipment.

51-52 Spare terminals			Can be used to supply battery backup power to the unit.


*  USE LOW VOLTAGE D.C. CIRCUIT ON THESE CONTACTS WITH A BACK BIASED DIODE 
	TO KILL ANY INDUCTIVE KICK FROM THE EXTERNAL CIRCUIT