Instruction manual

Robertson AP11 Autopilot

92 20220513E

5.4 Hardware check

To confirm that the NMEA hardware of the Junction Unit is

O.K., it is possible to make a loop-back test. Connect TX1+

to RX1+ and TX1- to RX1- for port no. 1 (J3000X) and similar

for port no. 2 (J300X).

The display will give the message "OK" if hardware is O.K.

and "--" if something wrong.

If a Dataline Databox is connected to one of the ports, it will

automatically do a loopback test without any hardwiring.

5.5 Signal monitor

On the Junction unit input it is possible to monitor the

incoming signal by observing corresponding "RX" LED on

the input circuit. Port 1 on Main Board, port 2 (J300X) on

Power Board.

Flickering LED indicates that signal is received.

However, there may still be a problem with baudrate,

polarity and stop bits.

Note ! The Junction unit also has a NMEA "TX" LED that will

flicker whenever the autopilot is on. (Sending heading

and rudder angle data.) Make sure this "TX" LED is not

mixed up with the "RX" LED when checking for

incoming data.

Press > to proceed to the System Status check.

5.6 System status

Rudder

Rudd er

Rudder

XX - Power Board Revision

YY - Main Board Revision

MODE