Northern Airborne Technology RS08 - Manual (Page 33)

SM15 Rev. 4.00 RS08 Remote Switch Manual
Nov 24, 2003 Page 3-1
ENG-FORM: 809-0106.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Section 3.0 Operation
3.1 Introduction
Information in this section consists of the functional and operating procedures for the
RS08 Remote Switch.
3.2 Mode Annunciation
A dual annunciator is provided for the pilot's reference, and indicates that the transfer
has been accomplished to the selected source. Provision is also made to allow
dimming of the annunciation by an external toggle switch. Because the ‘ILS Interlock’
can force a transfer of the system, the pilot should always take his cue from the
annunciators, not the transfer switch itself. If a lighted pushbutton switch with dual
legends is used, there will be no ambiguity.
3.3 NAV Selection
If at the time of installation, a NAV receiver was selected for connection to the ILS
interlock, and then is channeled to an ILS station, the RS08 will return the indicator to
the VOR/ILS mode irrespective of any other command. Care should be taken to not
preset any such station while navigating from the secondary NAV source or the
presentation will be switched back to the primary NAV system.
3.4 Annunciator Lighting
Since the annunciators must be readable in sunlight, power to these is not normally
taken from the aircraft lamp dimmer circuit, which would be off during daylight flying.
Instead, provision is made for a switched dimmer (full/half bright) control, to be mounted
by the annunciators. If a lamp test switch has been installed, it will light both lamps at
full brightness.
3.5 Fault Indications
3.5.1 Loss of Power
If power is lost to the RS08, both annunciators will be dark, and the system will return to
the VOR/ILS display. The lamps will NOT test OK. The pilot should confirm correct
data display by channeling the radio in question, or offsetting the radial, and checking
for the correct presentation.