[chirp_users] Chirp incorrectly defaults to Narrow band on 220 mhz amateur band.
1.25 M (220 Mhz) Amateur band incorrectly defaults to Narrow band. All amateur frequencies are Wide band. Please correct.
1.25 M (220 Mhz) Amateur band incorrectly defaults to Narrow band. All amateur frequencies are Wide band. Please correct.
First off, "all amateur frequencies are wideband" is demonstrably false.
Second, what chirp calls WFM is 100kHz broadcast FM, like what is available in your car or on several models with 88-106MHz broadcast receivers.
I just opened a new chirp page and put in 221.5MHz and it defaulted to FM, which is 5kHz deviation, and what public safety types would call "wideband".
See here for more details:
http://chirp.danplanet.com/projects/chirp/wiki/MemoryEditorColumns#Mode
Are you seeing it default to something other than 'FM' for 220?
--Dan
On 2/6/2017 14:33, Dan Smith wrote:
1.25 M (220 Mhz) Amateur band incorrectly defaults to Narrow band. All amateur frequencies are Wide band. Please correct.
First off, "all amateur frequencies are wideband" is demonstrably false.
Second, what chirp calls WFM is 100kHz broadcast FM, like what is available in your car or on several models with 88-106MHz broadcast receivers.
I just opened a new chirp page and put in 221.5MHz and it defaulted to FM, which is 5kHz deviation, and what public safety types would call "wideband".
See here for more details:
http://chirp.danplanet.com/projects/chirp/wiki/MemoryEditorColumns#Mode
Are you seeing it default to something other than 'FM' for 220?
Yes... Every 220 capable radio I've programmed defaults to NFM... Not "FM" the Baofeng UV-82X and the UV-5X3, as well as the Wouxun KG-UVD1p (220 version)
The US amateur band is 222-225 Mhz..
On 2/6/2017 14:33, Dan Smith wrote:
1.25 M (220 Mhz) Amateur band incorrectly defaults to Narrow band. All amateur frequencies are Wide band. Please correct.
First off, "all amateur frequencies are wideband" is demonstrably false.
I just opened a new chirp page and put in 221.5MHz and it defaulted to FM, which is 5kHz deviation, and what public safety types would call "wideband".
Your test frequency of 221.500 DOES default to "FM" in Chirp...
Try a different frequency, like 223.650. you'll see what I mean. Defaults to NFM, (incorrectly) and adds (correctly) a repeater split.
Yes... Every 220 capable radio I've programmed defaults to NFM... Not "FM" the Baofeng UV-82X and the UV-5X3, as well as the Wouxun KG-UVD1p (220 version)
CHIRP's behavior here is not radio-specific, FYI.
The US amateur band is 222-225 Mhz..
Ah, yep, indeed, I always forget about the missing chunk :)
http://www.arrl.org/files/file/Regulatory/Band%20Chart/Hambands_color.pdf
So yes, agree that it should default to "FM" in that range.
--Dan
On 2/6/2017 14:53, Dan Smith wrote:
Ah, yep, indeed, I always forget about the missing chunk :)
http://www.arrl.org/files/file/Regulatory/Band%20Chart/Hambands_color.pdf
So yes, agree that it should default to "FM" in that range.
--Dan
Awesome :) Thanks :)
On Mon, Feb 6, 2017 at 11:26 AM, John Wilkerson jl_wilkerson@att.net wrote:
1.25 M (220 Mhz) Amateur band incorrectly defaults to Narrow band. All amateur frequencies are Wide band. Please correct.
It looks like the author of the bandplans used NFM for all FM sections. Can you confirm that all IARU regions use 5 KHz deviation FM on all amateur frequencies, or is this only a North American problem?
Tom KD7LXL
On 2/6/2017 14:44, Tom Hayward wrote:
On Mon, Feb 6, 2017 at 11:26 AM, John Wilkerson jl_wilkerson@att.net wrote:
1.25 M (220 Mhz) Amateur band incorrectly defaults to Narrow band. All amateur frequencies are Wide band. Please correct.
It looks like the author of the bandplans used NFM for all FM sections. Can you confirm that all IARU regions use 5 KHz deviation FM on all amateur frequencies, or is this only a North American problem?
My references to "narrow" and "wide" may have initially confused.
For sake of Chirp, I mean "Wide" for what Chirp calls "FM" and narrow for what Chirp calls "NFM". In the USA, we use "FM"
Most of the world's amateurs are not in the USA.
On 06 February 2017 at 14:59 John Wilkerson jl_wilkerson@att.net wrote:
In the USA, we use "FM"
On 2/6/2017 15:03, Nigel A. Gunn G8IFF/W8IFF wrote:
Most of the world's amateurs are not in the USA.
But, does most of the world have a 1.25M amateur band?
My apologies if I offended. This concern I raised is specific to the 1.25M amateur band only, as used in the USA.
Most of the world's amateurs are not in the USA.
That may be, but CHIRP has different band plans for different regions, as selected from the menus. And we're talking about the NA bandplan here.
The only reason we're discussing Europe here is that the author of this (incorrect) NA band plan happened to be from Europe, which we're speculating is related to why it's wrong.
--Dan
Europe is 2.5KHz deviation to fit in with 12.5KHz channel spacing, the same as commercial users.
On 06 February 2017 at 14:44 Tom Hayward tom@tomh.us wrote:
On Mon, Feb 6, 2017 at 11:26 AM, John Wilkerson jl_wilkerson@att.net wrote:
1.25 M (220 Mhz) Amateur band incorrectly defaults to Narrow band. All amateur frequencies are Wide band. Please correct.
It looks like the author of the bandplans used NFM for all FM sections. Can you confirm that all IARU regions use 5 KHz deviation FM on all amateur frequencies, or is this only a North American problem?
Tom KD7LXL _______________________________________________ chirp_users mailing list chirp_users@intrepid.danplanet.com http://intrepid.danplanet.com/mailman/listinfo/chirp_users This message was sent to Nigel Gunn, W8IFF at nigel@ngunn.net To unsubscribe, send an email to chirp_users-unsubscribe@intrepid.danplanet.com
On 2/6/2017 15:01, Nigel A. Gunn G8IFF/W8IFF wrote:
Europe is 2.5KHz deviation to fit in with 12.5KHz channel spacing, the same as commercial users.
True.. but does Europe have a 1.25M amateur band?
No but they've got 4M.
On 06 February 2017 at 15:13 John Wilkerson jl_wilkerson@att.net wrote:
On 2/6/2017 15:01, Nigel A. Gunn G8IFF/W8IFF wrote:
Europe is 2.5KHz deviation to fit in with 12.5KHz channel spacing, the same as commercial users.
True.. but does Europe have a 1.25M amateur band? _______________________________________________ chirp_users mailing list chirp_users@intrepid.danplanet.com http://intrepid.danplanet.com/mailman/listinfo/chirp_users This message was sent to Nigel Gunn, W8IFF at nigel@ngunn.net To unsubscribe, send an email to chirp_users-unsubscribe@intrepid.danplanet.com
All VHF/UHF amateur frequencies SHOULD be narrow band. The repeaters are.
On 06 February 2017 at 14:26 John Wilkerson jl_wilkerson@att.net wrote:
1.25 M (220 Mhz) Amateur band incorrectly defaults to Narrow band. All amateur frequencies are Wide band. Please correct. _______________________________________________ chirp_users mailing list chirp_users@intrepid.danplanet.com http://intrepid.danplanet.com/mailman/listinfo/chirp_users This message was sent to Nigel Gunn, W8IFF at nigel@ngunn.net To unsubscribe, send an email to chirp_users-unsubscribe@intrepid.danplanet.com
Not in the USA.
On 2/6/2017 12:59 PM, Nigel A. Gunn G8IFF/W8IFF wrote:
All VHF/UHF amateur frequencies SHOULD be narrow band. The repeaters are.
On 06 February 2017 at 14:26 John Wilkerson jl_wilkerson@att.net wrote:
1.25 M (220 Mhz) Amateur band incorrectly defaults to Narrow band. All amateur frequencies are Wide band. Please correct. _______________________________________________ chirp_users mailing list chirp_users@intrepid.danplanet.com http://intrepid.danplanet.com/mailman/listinfo/chirp_users This message was sent to Nigel Gunn, W8IFF at nigel@ngunn.net To unsubscribe, send an email to chirp_users-unsubscribe@intrepid.danplanet.com
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On Feb 6, 2017, at 14:59, Nigel A. Gunn G8IFF/W8IFF nigel@ngunn.net wrote:
. The repeaters are.
No they are not….!
99% of the analog repeaters in North America are 5 khz deviation. Call it wide.
NFM is 2.5 khz. You can still copy it with a “wide” receiver. Crank up the volume knob.
For an old fart like me, the confusion is easy to understand.
When I first got on FM (1969), we used 15kHz (36F3) deviation and the channels were 60kHz apart.
Later on, we started moving to 5kHz deviation (16F3) and we started calling that narrow-band. There was a big discussion at repeater councils in region 2 whether to go with 20 kHz channels or 15 kHz and some places went one way, others the other! In region 1 they use 12.5 kHz channels. When I move dthere I have to change the master xtal in my IC900 and re-tune the PLL on 430 MHz to make the change. Now rigs come with all channels spacings built-in.
So to people my age that is narrow band. The commercial world, and, apparently, the amateur world in region 1, has gone one step further and is using 2.5 kHz deviation (11F3?)
We continually tell people in my city to make sure their rigs are set for wide-band, or normal FM, instead of narrow so we can hear them. The rigs seem all to come now form the factory set for narrow.
The previous poster's idea is not practical if you have a round robin and are lisetening ot them in the mobile, since continually turning the cvolume up and down is a distraction. Also, with a modulation index of less than 1, you no longer have the FM effect so you might as well be using AM!
I hope this helps to clear up the confusion.
73 de Nigel ve3id/g4ajq
On 06/02/17 15:56, r norris via chirp_users wrote:
On Feb 6, 2017, at 14:59, Nigel A. Gunn G8IFF/W8IFF nigel@ngunn.net wrote:
. The repeaters are.
No they are not….!
99% of the analog repeaters in North America are 5 khz deviation. Call it wide.
NFM is 2.5 khz. You can still copy it with a “wide” receiver. Crank up the volume knob.
chirp_users mailing list chirp_users@intrepid.danplanet.com http://intrepid.danplanet.com/mailman/listinfo/chirp_users This message was sent to Nigel Johnson ve3id at nw.johnson@ieee.org To unsubscribe, send an email to chirp_users-unsubscribe@intrepid.danplanet.com
participants (7)
-
Dan Smith -
John Wilkerson -
Nigel A. Gunn G8IFF/W8IFF -
Nigel Johnson MIEEE -
r norris -
Tom Hayward -
Trevor Holyoak