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Sandel
Avionics
SN3308 Navigation Display
Installation Manual
90106-IM-G(4) Installation Manual W SIG.doc
Page 17
1.4.11 UPS GXXX RS232 INTERFACE
Starting with software 2.07, the SN3308 is able to take advantage of the
IIMorrow/UPSAT GX Series Extended Moving Map Data Output. This allows the
CDI, VDI and annunciator information to be received via the RS-232 serial line.
Configuration Notes:
GX Series Notes:
In Setup, enable Extended MovMap Data Format
SN3308 Unit:
Set LNAV selection to IIMorrow GX (RS-232 ENH)
Vertical deviation (if desired) requires the ILS input pin pulled low.
Testing
The GX unit will not output RS-232 data in manual test mode
Upon power on, the GX will go through IFR Output Test Mode and the
following test can be observed:
CDI & Flags
VDI & Flags (if enabled on Sandel)
Annuciators
1.4.12 Pilot-Controlled Switches
Provision has been made for pilot controlled external switch closures (P2-22/14). We
suggest that this wiring be installed but capped and stowed, until the switch functions
are assigned in future versions of software. They may be used for remote map
functions in later versions of software, or for other remote selection functions.
1.4.13 Autopilot Interface
Course and heading datum outputs are provided. These can be selected to be AC or
DC in the Flight Control System (FCS) maintenance page and the direction sense of
these signals can be reversed as required.
A Back-course discrete output is provided for annunciation or AFCS reverse-course
control when required.
For older Century autopilots a Datum Excitation (5Khz) input is provided. However,
an external transformer coupler must be fabricated. See installation drawings.
1.4.14 Brightness Control
A separate brightness control only for the SN3308 must be installed externally. The
SN3308 does not have an internal photocell, so the pilot must be able to adjust the
dimming of the SN3308 separately from the other avionics. This control allows the
pilot to control the brightness of the display from 0% to 100% of normal brightness.