Garmin GDL 82 available?

[greghughespdx]

Steve and team -

With the GDL82 SBAS (which is the model currently shipping, with the built in GPS and antenna), can one choose to not use the antenna and go to the GTN or GNS navigator instead? I see the GNS480 is on the list of approved position sources with the latest software, but wanted to be sure the shipping unit with built in GPS capability also has that option? Thx.

[g3xpert]

Originally Posted by greghughespdx

Steve and team -

With the GDL82 SBAS (which is the model currently shipping, with the built in GPS and antenna), can one choose to not use the antenna and go to the GTN or GNS navigator instead? I see the GNS480 is on the list of approved position sources with the latest software, but wanted to be sure the shipping unit with built in GPS capability also has that option? Thx.

Hello Greg,

Yes, you may use an external source of ADS-B+ from a GNS/GTN instead of installing the provided antenna and using the GDL 82 built-in GPS receiver.

As shown in section 7.3 of the GDL 82 installation manual, the PC configuration tool allows you to specify whether the GPS source is Internal or External.

Thanks,
Steve

[wookiemail]

got ours 1/18 ordered about 3 weeks ago. Anyone have theirs working yet? BH

[flytoday]

First power-up for the GDL 82 today, although not securely installed yet in the plane. Only powered-up after making connections to the Sandia 165 transponder and the Comant Blade Antenna to make sure the 82 did not transmit an RF signal down a cable without an proper antenna/attenuator/load.

It isn't clear to me that the 82 can be safely powered up to run the Install Tool software on the shop bench without a transponder and an antenna connection.

Connected a Dell Laptop to the 82, via USB, and launched the GDL 82 Install Tool software. After a few seconds the laptop recognizes the new USB connection, and the Software indicates a GDL 82 is present.

Initially it took a few minutes for the 82 to determine the location using the Internal GPS. The GPS did determine the location a bit quicker after later power cycles, but still takes longer than the typical car or hiking GPS, requiring maybe 3-4 minutes. The rough guess, from observing the satellite status page, is that the 82 "accepts" the GPS position accuracy only after locking-in GPS Differential signals on 5 or so satellites.

While still searching for satellites the Software Tool indicates a Fault. The tool actually displays a Fault count, another fault can be that the transponder is either off or in standby mode. Interesting that these Faults do not turn on the Failure Annuciator light. Therefore it does not appear that the pilot has any information that the Internal GPS has captured enough satellite signals to have a valid position.

The Failure Annunciator light is turned on momentarily during power up. At least the multimeter chirped to indicate a momentary continuity to aircraft ground.

During Anonymous mode testing the unit changed from displaying my N number and HEX address to VFR as my Flight ID and another HEX address. It took a couple of power cycles for that "random" HEX address to actually change to a different HEX value. Just cycling the Anonymous switch does not change the "random" HEX value.



Once the 82 is powered the 165 indicated a very regular interrogation rate. It appears that the interrogate light blink can no longer accurately indicate if just ATC radar is interrogating the transponder.

My ground test location today did not have direct ground-level ATC radar coverage. Foreflight and a GDL 39 never displayed my position/squawk/flight id/etc.

Your Mileage May Vary!

Carl
..

[Caveman]

got ours 1/18 ordered about 3 weeks ago. Anyone have theirs working yet? BH

There are couple in the Oklahoma RV contingent installed and working, with two more that I know of in progress.

Once the 82 is powered the 165 indicated a very regular interrogation rate. It appears that the interrogate light blink can no longer accurately indicate if just ATC radar is interrogating the transponder. Carl

I can verify that the reply indication on my GTX 327 does not flash any longer. This concerned me at first but I have asked center for a transponder check on my test flight and yesterday on a lunch fly out I was in contact with Vance approach and they confirmed radar contact as well. I assume this is normal. My unit passed the ADSB FAA flight test on the first try and I received an email stating the rebate is on the way.
When our flight of two split up yesterday, we tried the anonymous mode and it took a few minutes before the displays switched from showing our N-number to VFR but it did work.

Joe

[uk_figs]

One of the other installs in Okie land, finished except for hooking up the GPS puck (the two TNC connectors I ordered for the RG142 shipped a week ago USPS from Missouri, currently tracked to St. Louis, MO, then to Charlotte NC, then to Memphis TN, and now to GKW??). I would like to fire up the unit to check out the configuration etc. but not sure it would be OK to do so without the GPS puck attached.
Assuming the USPS delivers in the next couple of days I hope to fly the check ride this week.

Biggest install issue was figuring where to mount the unit as it was longer than I expected particularly with the connector and getting behind the panel on a -7 slider is no fun. Also the data wires on the usb pigtail are very small wires and it is easy to break off the pin when crimped
Figs

[flytoday]

Originally Posted by flytoday

My ground test location today did not have direct ground-level ATC radar coverage. ForeFlight and a GDL 39 never displayed my position/squawk/flight id/etc.

Completed more GDL 82 ground testing today. The GDL 39 and ForeFlight did momentarily display my N number and Altitude Difference 0 before syncing as "ownship". When ForeFlight determines the ADS-B data is "ownship" Foreflight stops displaying Flight Id and Altitude Difference. Then using ForeFlight/More/Devices/Ownship provided a display of the 82's and the Mode C transponder parameters. Not as much data as the 82 Install Tool, but still many data parameters.

Selecting Anonymous Mode seems to cause ForeFlight to temporarily drop "ownship" status and displays VFR and Altitude Difference on the map for a few seconds. Then "ownship" status resumes and the display of VFR and Altitude Difference on the map terminates.

BTW using a Scout and ForeFlight on an airliner has provided a relaxed environment to experiment with ForeFlight and discover the ADS-B IN system interaction with ForeFlight.

Carl
..

[uk_figs]

Finished the install and flew the test flight yesterday, 43 minutes in the system, 12998 data points and zero errors. System appears to work as advertised.

[nomocom]

Originally Posted by g3xpert

Hello Stan,

No, the GDL 82 doesn't currently output any GPS data, but we haven't totally ruled out providing ADS-B+ like the GNS/GTN/GTX 335/345 w/GPS.

Thanks,
Steve

Thanks for the reply. Yep, please pass on my vote to the team, having the WAAS quality data stream would be helpful. The ADS-B GPS data is better than none or the non-waas stream from older gps units.

[uk_figs]

For all practicable purposes how would the waas gps output from the GDL 82 compare to my current 796 gps output that feeds the GDL 39, autopilot, D100 etc.
Figs