Hey
Got Alt readout with one wire... Nice. But not knowing the posibility, I bought converter. I am not sure, if converter will in future have som usefull funktion.
Had a avionics technician looking at the converter and SkyView.
He wrote:
ATT:
To whom at Dynon Avionics it might concern.
Subject:
Suspected faulty Serial-to-Grey Code Converter (Dynon P/N 100362-000)
Fault description:
A Dynon Serial-to-Grey Code Converter fed by a Dynon SV-1000D Skyview Display, fails to feed a Garmin GTX-328 transponder with valid Mode-C Altitude Grey Code.
Observations:
The Garmin GTX-328 transponder detects all 9 Grey-Code discretes (A1,A2,A4,B1,B2,B4,C1,C2,C4) from the Dynon Serial-to-Grey converter, as steady "OPEN" state.
This has been re-confirmed, at all times, by measuring aprox 4,8 Volt's on each of the Grey-Coded outputs mentioned above.
Disconnecting the Serial-to-Grey Code Converter from the Skyview Display serial port, results in no change of the Converter Grey-Code output discretes. (all still "high/open")
The Garmin GTX-328 transponder runs flawless when provided with Grey-Code from an Amer-King AK-350 Altitude Encoder.
System Scenario:
The Dynon Serial-to-Grey Code converter are connected to Serial Port 1 of a Dynon SV-1000D Skyview Display, as per the SV-1000D instruction manual Page 9-12, Figure 25.
SV-D1000 37 pin D-Sub male. (see Instruction manual Page 12-6, Table 25)
Pin 3 Serial RX - connects to Dynon Serial-to-Grey Code converter Transmit GREEN Wire.
Pin 4 Serial TX - connects to Dynon Serial-to-Grey Code converter Receive BLACK Wire.
SV-D1000 Serial Port No°1 has been choosen, and Encoder Format has been setup as per the instruction manual Page 9-11, mid text-section.
Serial 1 IN Device: NONE
Serial 1 IN FUNCTION: NONE
Serial 1 IN/OUT BAUD RATE: 1200
Serial 1 OUT DEVICE: DYNON CONVERTER
The Dynon Serial-to-Grey Code Converter are provided with power by means of a switched Voltage from the Garmin GTX-328 transponder.
The presence of this voltage has been re-confirmed by measuring 12V DC between the Red (posistive) and Black (negative) wires going
to the Dynon Serial-to-Grey Converter. The power are present whenever the Garmin GTX-328 transponder are switched ON.
Both Dynon Skyview Display and Garmin GTX-328 transponder are grounded at a common Avionics power ground point.
Conclusion:
We have no means of checking if the Serial RS-232 Data Bus transmitted from the Skyview Display are valid/present - except from beeing
able to re-confirm a presence of an alternating current on the Bus, by means of a simple Digital multimeter.
The TX-Counter on the Skyview Display Serial Port 1 setup page, are observed as steadily advancing in number.
This leads us to suspect the Dynon Serial-to-Grey Code Converter as beeing unserviceable/faulty.
