Sanden SN3500, Installation Manual, Page: 43 / 150

Installation
82005-IM-K Sandel SN3500 Installation Manual Page 3-8
P2-4: ADF-2 AC-X or AC/DC-SIN Input / TACAN 1 429/419 A
P2-34: ADF-2 AC-Y or AC/DC-COS Input / TACAN 1 429/419 B
Inputs from ADF2 Receiver. Selection of AC/DC operation is on the ADF
maintenance page. For DC use P2-20 as the DC reference input. For AC
inputs Z is grounded. 24 AWG twisted shielded pair wire is recommended for
these functions.
P2-20: ADF2 DC Ref
Used when DC Sin/Cos inputs are used.
P2-5: ADF2 Valid
Discrete ADF Valid input used if available.
P2-19: VHF Nav2 ILS Energize Input
Control the enabling of the Vertical Deviation Bar when NAV2 selected
P2-35: VHF NAV2 429A/Composite
P2-21: VHF NAV2 429B
Primary 429 input from VHF NAV2, or composite input from analog receiver
for VOR bearing pointer. Composite is normally .5v VOR / .33v LOC. For 3V
inputs a series resistor is required, see the installation drawings. When using
the composite input for LOC deviation, the calibration procedure found in
section 7.1.5 must be followed for each specific LOC input. 24 AWG shielded
wire is recommended for these connections. Note: When using the composite
signal for the localizer deviation input, the calibration procedure found in
section 7.1.5 must be performed after the installation prior to release for flight.
P2-6: DME1 Data, Analog DME DC+/429A
P2-36: DME1 CLK, Analog DME DC-/429B
P2-22: DME1 Sync
P2-7: DME1 Hold
Serial data inputs for either ARINC 429 / 568 serial protocols to support
ARINC DME’s as selected within the DME Maintenance page (Low speed
only), Bendix/King DME’s using King Serial Digital protocol. See the
installation drawings. 24 AWG twisted shielded triple conductor is required for
these functions. Note: This is DME1.
Analog DME input (40mV/mile) may also be used.
P2-37: OBS Resolver DC ref Input
P2-23: OBS Resolver H Input
P2-8: OBS Resolver SIN Output
P2-38: OBS Resolver COS Output
OBS resolver connections for NAV or GPS receivers. The input frequency
range is 20Hz to 500Hz, and calibration is done on the NAV maintenance
page. The resolver is electrically zeroed at zero degrees plus the calibration
value in the NAV maintenance page. For normal use this calibration value will
be –60 degrees (equaling 300 degrees electrical zero). This is the factory