4 continued airworthiness, 5 accessories required but not supplied – Northern Airborne Technology AA95-766 User Manual
Page 16
AA95-766 Single Channel Audio Controller Manual
SM95-766 Rev. 2.00
2.3.7.2
Cautions
Although in-line PTT cordsets can be used conveniently to address a number of
requirements for microphone and PTT control, they can also be a source of trouble if
incorrectly configured, or improperly shielded.
Many in-line PTT cordsets use the PHONE LO connection as the ground reference for
the ICS and TX PTT keylines. The PHONE LO connection in the AA95-766 is floating,
which will lead to incorrect keying of the intercom and radio systems if this type of
cordset is used.
In-line PTT cordsets can be a very real source for crosstalk, if the MIC wire pair in the
cordset is not shielded. The source of the crosstalk is the high level Phones audio
being coupled on to the MIC HI/LO pair in the in-line PTT cordset, because of the lack
of shielding for this wire pair. Once the mic line is contaminated, the undesired audio
can be sent into the audio system as ‘mic audio’, then processed and distributed to all
other audio controllers via the ICS Tie Line.
2.4
Continued Airworthiness
Maintenance of the AA95-766 Single Channel Audio Controller is ‘on condition’ only.
Periodic maintenance of this product is not required.
2.5
Accessories Required But Not Supplied
Installation kit AA90-IKC (Nat Part # D50S37SL-IKC) is required to complete the installation.
It consists of one 50-Pin D-min Female Crimp Kit (D50SL-IKC) and one 37-Pin D-min
Female Crimp Kit (D37SL-IKC)
NAT Part #: D50SL-IKC
Quantity
Description
NAT Part #
1
D-min 50 Socket Housing
20-21-050
50
MS Crimp Socket
20-26-901
1*
Jack Screw Set
20-27-002
1*
Lock Clip Set
20-27-004
1
50 Pin Connector Hood
20-29-051
NAT Part #: D37SL-IKC
Quantity
Description
NAT Part #
1
D-min 37 Socket Housing
20-21-037
37
MS Crimp Socket
20-26-901
1*
Jack Screw Set
20-27-002
1*
Lock Clip Set
20-27-004
1
37 Pin Connector Hood
20-29-038
* Use as required.
Page 2-6
Dec 6, 2004
ENG-FORM: 805-0106.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.