Installation Instructions

GTN 6XX/7XX AML STC Installation Manual 190-01007-A3
Page E-37 Rev. 4
ALL WIRES 24 AWG OR LARGER UNLESS OTHERWISE SPECIFIED.
GROUND DESIGNATIONS: SHIELD BLOCK GROUND AIRFRAME GROUND
THE
500 OHM AUDIO OUTPUTS ARE BALANCED OUTPUTS, AND THE LO OUTPUTS MUST BE CONNECTED. IF
THE AUDIO PANEL DOES NOT HAVE A LO INPUT
, THE LO OUTPUT SHOULD BE CONNECTED TO A GROUND
LUG AT THE AUDIO PANEL.
REFER TO MANUFACTURER’S DOCUMENTATION FOR COMPLETE PINOUT AND INTERCONNECT
INFORMATION. PINOUTS OF OTHER UNITS SHOWN FOR REFERENCE ONLY.
SHIELDS FOR AUDIO CABLES SHOULD BE GROUNDED AT ONE END (WITH LEADS LESS THAN 3
.0 INCHES)
AND LEFT FLOATING AT THE OTHER END.
IF SHIELDED AUDIO CABLE IS CARRIED THROUGH A
DISCONNECT, CARRY THE SHIELD GROUND THROUGH THE DISCONNECT ON A SEPARATE PIN
.
CONNECTING TWO MICROPHONES TO MIC AUDIO HI/LO AT THE SAME TIME MAY RESULT IN WEAK OR
DISTORTED AUDIO. MIC ISOLATION RELAYS ARE RECOMMENDED SO THAT ONLY ONE MIC IS ACTIVE AT A
TIME.
SPLICE 500Ω COM AUDIO LO AND MIC AUDIO IN LO TOGETHER INTO THE SAME PIN ON AUDIO PANEL.
IT IS ACCEPTABLE TO USE OTHER AVAILABLE UNSWITCHED, UNMUTED INPUTS. IF AUDIO PANEL DOES
NOT HAVE AN AVAILABLE UNSWITCHED INPUT, AUDIO FROM THE GTN 6XX/7XX MUST BE MIXED WITH AN
EXISTING AUDIO SOURCE USING RESISTORS TO ISOLATE THE AUDIO OUTPUT FROM EACH LRU. A TYPICAL
VALUE FOR MIXING RESISTORS IS
390Ω ¼ W. THE AUDIO LEVELS OF EXISTING AUDIO SOURCES WILL
HAVE TO BE RE-EVALUATED AFTER MIXING RESISTORS ARE INSTALLED.
FOR GMA 35
INTERCONNECT WIRING SEE APPENDIX F.
THE RS-232
CONNECTION TO THE GMA
350/350H IS FOR FUTURE USE. THIS CONNECTION CAN ONLY BE
MADE TO ONE GTN PER INSTALLATION. IT IS RECOMMENDED TO MAKE THIS CONNECTION TO THE #1 GTN.
ANY AVAILABLE RS-232 PORT MAY BE USED. REFER TO SECTION 5.5.1.2 FOR RS-232 CHANNEL
SETTINGS.
1
2
3
4
5
6
7
8
9
10
11
NOTES:
s
Figure E-14. GTN 6XX/7XX Audio Panel Interconnect
Sheet 3 of 3