Eventide ARGUS 5000 - Page 227

ADF/REMOTE Switch Installation Details
The ADF/REMOTE switch allows the Argus, with a limited number of connector pins,
to accept data from either the ADF receiver or from the remote switches. The pilot
uses this switch to select which feature he wishes to have available at any given time..
In the ADF position, Argus connector 1P1 pins 1 and 2 are connected to the ADF X
and Y signal source through the ADF/REMOTE switch. Argus connector 1 PI pin 3
is connected either to the ADF reference voltage (about 4.5 V) of a DC model ADF or,
in the case of an AC model, to the Argus 5-volt output, 1P1 pin 23, in which case there
is also about 4.5 volts on 1P1 pin 3. This voltage tells the Argus to interpret the
voltage at pins 1 and 2 as ADF inputs.
In the REMOTE SWITCH position, Argus connector 1P1 pins 1 and 2 are connected
to the REMOTE SWITCHES through the ADF/REMOTE switch. In this case, Argus
connector 1P1 pin 3 is connected through a 2.2K resistor to 1P1 pin 11, which
provides a 12 volt output that biases pin 3 to approximately 7 volts. This voltage tells
the Argus to regard pins 1 and 2 as the remote switch inputs. At the same time, the
other two 2.2K resistors bias pins 1 and 2 above ground, so that closing either remote
switch produces a voltage change at these pins that can be detected by the Argus.
Note that the presence of the remote switches must be registered in the SETUP mode
in order for them to be recognized. In an installation in which the ADF/REMOTE
switch is used, correct operation of ADF and improper operation of the remote
switches or vice versa almost inevitably points to defective wiring or external
hardware, as they both use the same set of Argus inputs.
July 1999 Argus 5000/7000 Ver. 5.xx Reference Manual Part#141003 223