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Sandel
Avionics
SN3308 Navigation Display
Installation Manual
90106-IM-G(4) Installation Manual W SIG.doc
Page 36
P2-30: GPS SELECTED Input
This input is used when the SN3308 is set up for slave mode so an
external
GPS switch can be used to switch to an external GPS receiver. Causes
proper mode switching and annunciation on the SN3308 display. This input is
active only when enabled in the System maintenance page.
P2-13: Reserved for Future Use
P2-32: OBS-/LEG, HLD-/AUTO or PAR TRK- Annunciator Input
For selected GPS-1 receiver with OBS/LEG mode (or HOLD/AUTO), this input
when low senses and annunciates OBS or HOLD on the SN3308 display and
changes the mode of the course pointer from auto-slew to manual control.
Otherwise, this is used as a PAR TRK input for other types of receivers, based
on the selection in the LNAV maintenance page.
P2-14: External Switch 2 In.
See P2-22.
P2-33: Spare Input 1
Reserved for future use.
P2-15: Inner Marker Beacon Input
P2-16: Outer Marker Beacon Input
P2-34: Middle Marker Beacon Input
Marker beacon receiver inputs. Normally connected to the external lamp
drivers on the marker beacon receiver, see the installation drawings. Most
marker beacon receivers use “DC” ground referenced outputs driven by
transistor drivers. All such receivers are compatible as shown on the
installation drawings. Some very old designs may use transformer outputs
which are AC coupled. In such an instance call Sandel for installation
guidance.
P2-17: ADF-1 AC-X or DC-SIN Input
P2-35: ADF-1 AC-Y or DC-COS Input
Inputs from ADF-1 Receiver. Selection of AC/DC operation is on the ADF
maintenance page. For DC use P2-18 as the DC reference input. For AC
inputs Z is grounded. 24 AWG twisted shielded pair wire is recommended for
these functions.
P2-18: ADF-2 AC-X or ADF-1 DC Ref
P2-36: ADF-2 AC-Y or ADF-2 DC Ref
Used as DC REF inputs when DC Sin/Cos ADF is used as ADF-1 or ADF-2.
Used as AC X/Y if ADF-2 is AC. The DC function is activated when ADF-1 is
selected as a DC receiver in the ADF-1 maintenance page. For AC inputs Z is
grounded.
P2-19: ADF-2 DC-SIN or 400Hz Diff. Resolver SIN
P2-37: ADF-2 DC-COS or 400Hz Diff. Resolver COS