[chirp_users] Odd splits....

Jim Unroe rock.unroe at gmail.com
Fri Jun 13 02:48:16 PDT 2014


On Thu, Jun 12, 2014 at 10:56 PM, Forrest <wfj at usa.com> wrote:

> I asked a while back, but got no response.  Since there has been a bit of
> a conversation about transmitting, I thought I would ask again….
>
> Using CHIRP (latest stable or daily) I find that I can specify odd splits
> (not just +/- .6), but the software doesn’t seem to save them correctly.
>  Anyone notice this besides me?  If I set it up in CHIRP, it will hold long
> enough to program the radio, but it reverts to some odd mixture of either +
> or - in that column if I try to save and reload the spreadsheet.  I have to
> reset the correct transmit freq every time I use it.
>
> I’m famous for oddball issues, so if this affects no one else, I’ll just
> live with it, but I would call it a bug worth noting to the software
> developer(s).  BTW, I’m using the Mac version, but I don’t think it
> matters.  Seems like I had the same issue when I tried a Win version.
>
> TIA,
> Forrest
>

Forrest,

What you are describing is normal behavior when the RX and TX frequencies
are in the same band and within the OFFSET range of the radio. CHIRP will
examine the 2 frequencies, calculate the difference and update the entry
using the Duplex (- or +) and OFFSET equivalent. Try these examples.

1. Enter a standard VHF repeater using split
Frequency = 146.840
Duplex = split
Offset = 146.240

Now press the [Go] button (or save to an .img file or upload to the radio).
The cells will be changed to
Duplex = -
Offset = 0.600000

2. Enter a standard UHF repeater using split
Frequency = 444.900
Duplex = split
Offset = 449.900

Now press the [Go] button (or save to an .img file or upload to the radio).
The cells will be changed to
Duplex = +
Offset = 5.000000

3. Enter a made up split
Frequency = 137.000
Duplex = split
Offset = 177.000

Now press the [Go] button (or save to an .img file or upload to the radio).
The cells will be changed to
Duplex = +
Offset = 40.000000

All three examples are change to their correct and equivalent -/+ Duplex
and OFFSET values.

Jim KC9HI
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