Bill_H
Well Known Member
Surely this will be an easy problem to fix...
This is on N412BR, the first E-LSA Skyview RV12 with the original conversion wiring harnesses shipped, but no earlier avionics installed (one of the "waiting for Skyview" folks.)
Simple question, then the details.
The AV5000A box comes with an empty DB-9 plug for the ADSB receiver or a GPS. Pins 2 and 3 on that plug SHOULD be connected to one of the 5 Skyview serial ports.
a> Is this true?
b> Which serial port? 1, 2, or 4? (Port 3 is used for the Dynon transponder and 5 is used for the Dynon GPS module)
Here's what I did and the symptoms.
I purchased the ADSB module, antenna, coax, and wiring harness from Steinair. The 4-wire wiring harness comes with a mail DB9 pre-installed on one end and pre-attached pins on the other. The 4 wires are:
Pin 1 - Red - power
Pin 2 - White - ADSB470 box RX
Pin 3 - White - ADSB470 box TX
Pin 4 - Black - Ground
I checked continuity of these wires before I started, good, no shorts.
Note that Stein supplies these wires with the TX-RX-Ground wire shields connected with little green jumpers at one end only - the end with the loose pins. The Skyview manual does not indicate that is needed.
I mounted the 470 receiver on the back bulkhead to the pilot side of the bulkhead opening. I attached the wiring harness and ran the wires forward through snap bushings added on the pilots side, the wire running right below the longeron. It will be covered by the interior panels. I ran it up through the bottom of the panel right forward of the ignition module/master switch box. I put the four wires into a DB9 and plugged it into the AV5000A box into the empty ADSB socket. I put a 2A fuse in the panel in its empty ADSB socket (it draws 0.2a). I also mount and connect the supplied antenna in the tailcone.
I pull the fuel pump fuse and power on the plane.
NOTE: You must also engage the AVIONICS switch for power to go to the ADSB470. This is proper.
The 470 has an LED on it that is now blinking slowly. According to the manual this indicates that the module is operating but is not fully communicating with Skyview. So far, so good - the Skyview has to be told what is connected to the serial ports - it does not auto-sense that.
I go to Setup>Local Display Setup> Serial Port Setup.
There are are only 3 unused serial port choices; they indicate NONE as the connected device - ports 1-2-4. (This is how they are, I did not have to change that.) Port 3 is the Dynon Transponder, Port 5 is the Dynon GPS. I have no idea how the AV5000 is wired so I figure it is easy enough to try all three.
TRY PORT 1:
Following the installation instructions, I assign port 1 to the ADSB470 (picked from a list) and hit ACCEPT. I navigate to the SETUP MENU>ADSB-STATUS and it says "NOT FOUND." (Note - on the ground you might expect to see "NO SIGNAL" once you do find the right serial port...)
I go back to Port 1 and reset it to NONE, hit Accept.
TRY PORT 2:
I assign port 2 to the ADSB470 and hit ACCEPT. I navigate to the SETUP MENU>ADSB-STATUS and it says "NOT FOUND." I go back to Port 2 and reset it to NONE, hit accept.
TRY PORT 4:
I assign port 4 to the ADSB470 and hit ACCEPT. I navigate to the SETUP MENU>ADSB-STATUS and it says "NOT FOUND."
I go back to Port 4 and reset it to NONE, hit Accept.
Hmmmm. I think that maybe the TX-RX wires are reversed.
I swap those two pins in the DB-9 connected to the AV5000A box - one end of the cable only.
I repeat the above procedure, again assigning the 470 to ports 1, 2, and 4 and checking status. The same results - NOT FOUND on any port.
Suggestions???
My next step could be to only use pins 1 and 4 to the AV5000A box (power/ground) and send the other two RX-TX wires directly into the main connector on the Skyview D-1000. But I would like it to work as designed...
EDITED ADDED NOTE: I knocked off for the day but I will also check to be sure that adding the pins to the other DB9 didn't introduce a short-to-shield in a TX or RX wire.
N412BR "Sweetie" undergoing its first annual inspection! Gear mod is next...
This is on N412BR, the first E-LSA Skyview RV12 with the original conversion wiring harnesses shipped, but no earlier avionics installed (one of the "waiting for Skyview" folks.)
Simple question, then the details.
The AV5000A box comes with an empty DB-9 plug for the ADSB receiver or a GPS. Pins 2 and 3 on that plug SHOULD be connected to one of the 5 Skyview serial ports.
a> Is this true?
b> Which serial port? 1, 2, or 4? (Port 3 is used for the Dynon transponder and 5 is used for the Dynon GPS module)
Here's what I did and the symptoms.
I purchased the ADSB module, antenna, coax, and wiring harness from Steinair. The 4-wire wiring harness comes with a mail DB9 pre-installed on one end and pre-attached pins on the other. The 4 wires are:
Pin 1 - Red - power
Pin 2 - White - ADSB470 box RX
Pin 3 - White - ADSB470 box TX
Pin 4 - Black - Ground
I checked continuity of these wires before I started, good, no shorts.
Note that Stein supplies these wires with the TX-RX-Ground wire shields connected with little green jumpers at one end only - the end with the loose pins. The Skyview manual does not indicate that is needed.
I mounted the 470 receiver on the back bulkhead to the pilot side of the bulkhead opening. I attached the wiring harness and ran the wires forward through snap bushings added on the pilots side, the wire running right below the longeron. It will be covered by the interior panels. I ran it up through the bottom of the panel right forward of the ignition module/master switch box. I put the four wires into a DB9 and plugged it into the AV5000A box into the empty ADSB socket. I put a 2A fuse in the panel in its empty ADSB socket (it draws 0.2a). I also mount and connect the supplied antenna in the tailcone.
I pull the fuel pump fuse and power on the plane.
NOTE: You must also engage the AVIONICS switch for power to go to the ADSB470. This is proper.
The 470 has an LED on it that is now blinking slowly. According to the manual this indicates that the module is operating but is not fully communicating with Skyview. So far, so good - the Skyview has to be told what is connected to the serial ports - it does not auto-sense that.
I go to Setup>Local Display Setup> Serial Port Setup.
There are are only 3 unused serial port choices; they indicate NONE as the connected device - ports 1-2-4. (This is how they are, I did not have to change that.) Port 3 is the Dynon Transponder, Port 5 is the Dynon GPS. I have no idea how the AV5000 is wired so I figure it is easy enough to try all three.
TRY PORT 1:
Following the installation instructions, I assign port 1 to the ADSB470 (picked from a list) and hit ACCEPT. I navigate to the SETUP MENU>ADSB-STATUS and it says "NOT FOUND." (Note - on the ground you might expect to see "NO SIGNAL" once you do find the right serial port...)
I go back to Port 1 and reset it to NONE, hit Accept.
TRY PORT 2:
I assign port 2 to the ADSB470 and hit ACCEPT. I navigate to the SETUP MENU>ADSB-STATUS and it says "NOT FOUND." I go back to Port 2 and reset it to NONE, hit accept.
TRY PORT 4:
I assign port 4 to the ADSB470 and hit ACCEPT. I navigate to the SETUP MENU>ADSB-STATUS and it says "NOT FOUND."
I go back to Port 4 and reset it to NONE, hit Accept.
Hmmmm. I think that maybe the TX-RX wires are reversed.
I swap those two pins in the DB-9 connected to the AV5000A box - one end of the cable only.
I repeat the above procedure, again assigning the 470 to ports 1, 2, and 4 and checking status. The same results - NOT FOUND on any port.
Suggestions???
My next step could be to only use pins 1 and 4 to the AV5000A box (power/ground) and send the other two RX-TX wires directly into the main connector on the Skyview D-1000. But I would like it to work as designed...
EDITED ADDED NOTE: I knocked off for the day but I will also check to be sure that adding the pins to the other DB9 didn't introduce a short-to-shield in a TX or RX wire.
N412BR "Sweetie" undergoing its first annual inspection! Gear mod is next...
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