Northern Airborne Technology AMS50 User Manual
Page 26
AMS50-000 Stereo Audio Panel with Marker Manual
SM50 Rev. 4.00
2.3.7.2
MUSIC SOURCE Selection
The MUSIC SOURCE switch allows the user to input music from either a portable
cassette/CD player (phone output) or CD changer/am/fm cassette player (line out).
Select this switch to the right (PTBL) to accept music from the ‘phone’ output of a
portable cassette/CD player. Select this switch to the left (CHG) to accept music from a
CD changer/am/fm cassette player. When using a portable cassette/CD player, NAT
recommends that the phone output is used for interface to increase tone control and
volume. (The ‘line out’ output lacks volume and tone control.) Start with the volume
about half way to confirm operation then adjust as desired.
CAUTION
Certain aircraft installations may use a car type, am/fm cassette or CD
player with no ‘line out’ output. To use the ‘speaker’ outputs from the stereo
unit, a floating ground adapter and input attenuation network (resistors) may
be required to provide the correct system interconnect and to prevent
damage to the music input(s) of the AMS50 and the speaker output circuits
of the music source. Set the MUSIC SOURCE switch to the left (CHG).
2.3.7.3
Speaker output (SPKR)
The speaker audio is adjustable between 0-7 W into a 4 Ω load by rotating the SPKR
pot on the rear of the unit.
CAUTION
The speaker is a bridged output. DO NOT ground either of the output leads.
The speaker output does not need to be loaded if a speaker is not installed.
2.3.7.4
Backlighting and Indicator Intensity Adjustments
The intensity of the backlighting (BACK LIGHT) and indicators (IND) can be adjusted to
match neighbouring avionics by rotating the respective pots on the bottom of the unit.
2.3.7.5
Marker adjustments.
The MKR HI, MKR LO and MKR LEVEL switches should only be used in conjunction
with the Acceptance Test Procedure AMS50\614-0 found in the Maintenance Section
(Section 5) of this manual.
Page 2-8
Nov 12, 2003
ENG-FORM: 805-0104.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.