Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: Two Way GPS Units  (Read 763 times)
K2GW
Member

Posts: 535


WWW

Ignore
« on: April 03, 2008, 11:53:09 AM »

I'm trying to compile a list of all GPS units that easily provide two way data communication so as to show the location of other APRS equiped vehicles directly on their internal map display.  So far I know of the

AvMap G5
Garmin GPS III+
Garmin GPS V

Any others for this list?  Please don't add units that just send data out to report your location; that's pretty much a given for most units.

Thanks & 73

Gary, K2GW
Logged
AA4PB
Member

Posts: 12669




Ignore
« Reply #1 on: April 03, 2008, 06:58:59 PM »

Are you sure that the Garmin units can plot GPS positions received in NMEA format from the serial port onto the map display? I know the two-way communications allows the uploading of new maps and way-points (in proprietary Garmin format) but was not aware that it could plot positions received via the serial port.
Logged
K0JEG
Member

Posts: 631




Ignore
« Reply #2 on: April 03, 2008, 08:14:13 PM »

My old, reliable Garmin Vista has a serial port mode called "NMEA w/Waypoint support" that sorta plots received APRS data from my D-700 on the map. However, it truncates the first letter of the callsign, and it only displays nearby waypoints at an high zoom level. This limits it's usefulness, but I can search for waypoints just like any other.
Logged
K2GW
Member

Posts: 535


WWW

Ignore
« Reply #3 on: April 04, 2008, 07:35:20 AM »

>Are you sure that the Garmin units can plot GPS positions received in NMEA format from the serial port onto the map display?

Those two specific units do so. I have Garmin III which doesn't and a Garmin III+ which does when connected to my Kenwood TH-7 HT.  The APRS positions show up as waypoints truncated to the first six characters of the callsign.

It is a little funky as the map display blanks momentarily as a "waypoint" for a mobile station is updated with new coordinates and moves.

The Garmin V is effectively a Garmin III+ with a finer resolution display and more memory.  A review of it here on eHam by a ham says it does show callsigns similarly for him.

I'm still looking for other models that do the same.  Anyone know of any?

73

Gary, K2GW
Logged
KE7DGM
Member

Posts: 4




Ignore
« Reply #4 on: April 05, 2008, 04:11:34 PM »


Another model that will plot the position of the received waypoint is the Garmin GPSmap 76C.  This model will plot the waypoint name with a 9 digit callsign.  Note there is a bug in firmware versions higher than 4.0.  With the newer firmware, when a subsequent position report is received from a station that was already plotted, the GPS will plot a second waypoint with a nonsense character added to the waypoint name.  The desired behavior is to adjust the exsting waypoint to the new location.

The Garmin GPSmap 60C, 60CS, 76C and 76CS all share the same electronics and firmware, just different form factor, so all should work the same for your purposes.

I have heard rumors that the newer models the GPSmap 76CSX, also suffer from the waypoint plotting bug.

By the way,  I also have a Garmin III+  and can confirm that it plots the received waypoint with 6 digit name as you have already described.

Bob Nolan
AJ4GN  (formerly KE7DGM)
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!