What arethe side affects to doing this?  I have already ordered the new atenna.  Are there positive or negative side affects?
----- Original Message -----
From: Craig Hughes
To: General mailing list for gumstix users.
Sent: Tuesday, August 07, 2007 1:58 PM
Subject: Re: [Gumstix-users] Starting the GPS

You can modify the GPSstix to work with a passive antenna instead of an active one, fairly easily.  You should see on top of the board a white stenciled box, which has 2 set of pads in it: "zero ohm passive" which is not populated by default, and "ten ohm active" which is populated.  If you use a knife to pop off the ten ohm resistor, then solder a piece of wire across the zero ohm pads, the board will then work with a passive antenna.

C

On Aug 7, 2007, at 10:56 AM, Michael Caughey wrote:

I have the wrong antenna.  Its not an active one.  I got the one I have from Sparkfun.  Actually I have two in case anyone wants them.  They just don;t work with the GPSStix.
 
I also found the NMEA Sentence definitions by Glenn Baddeley.
Thanks for your help, I think once the new Antenna is in I'll be good to go.
 
-michael
----- Original Message -----
Sent: Tuesday, August 07, 2007 1:47 PM
Subject: Re: [Gumstix-users] Starting the GPS

I think that's saying it's only seeing one satellite (number 18):

GSV - GPS Satellites in View

The number of satellites in view, together with each PRN (SV Id), elevation and azimuth, and C/No (Signal/Noise Ratio) value. Only four satellite details are transmitted in one message. There are up to 4 messages used as indicated in the first field NoMsg.

$GPGSV,NoMsg,MsgNo,NoSv,{,sv,elv,az,cno}*cs<CR><LF>
Name
ASCII String
Units
Description
Format
Example

$GPGSV
string
$GPGSV
 
Message ID
GSV protocol header
NoMsg
1 digit
3
 
Number of Messages
Total number of GPGSV messages being output
MsgNo
1 digit
1
 
Message Number
Number of this message
NoSv
numeric
10
 
Satellites in View
 
sv
numeric
23
 
Satellite ID
SV ID (GPS: 1-32, SBAS 33-64 (33=PRN120))
elv
numeric
38
degree
Elevation
Maximum 90
az
numeric
230
degree
Azimuth
Range 0 to 359
cno
numeric
44
dBHz
C/No
Range 0 to 99, null when not tracking
...
 
 
 
...
Data of 2nd, 3rd Satellite (same as above)
sv
numeric
29
 
Satellite ID
SV ID (Range 1 to 32)
elv
numeric
71
degree
Elevation
Maximum 90
az
numeric
156
degree
Azimuth
Range 0 to 359
cno
numeric
47
dBHz
C/No
Range 0 to 99, null when not tracking
...
 
 
 
...
 
cs
hexadecimal
*7F
 
Checksum
 
 
 
 
 
<CR> <LF>
End of message

C


On Aug 7, 2007, at 10:13 AM, Michael Caughey wrote:

$GPGSV,1,1,01,18,,,27*74





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