[ICOM] RTTY Filters in IC-756PROII
Ekki Plicht
ep at plicht.de
Sat Jan 15 16:53:40 EST 2005
On Saturday 15 January 2005 22:37, Tapani Juhola wrote:
> I have used ICOM 756P2 nearly 3 years on RTTY successfully as I did not
> have to bother to change any default values for RTTY: 170 Hz shift,
> 2125 Mark, Normal, USOS=ON etc. which complied with my modem
> settings. Pressing the RTTY FIL button on the front panel brings
> in use the favorite RTTY filter (with or w/o TPF)nicely. I use TPF
> seldom to pull up the weak station under extreme conditions .
>
> Now I got to check another modem (PK-232) with 200 Hz shift, Low tones
> (1275 Mark). Again all five standard RTTY filters co-operated, but pressing
> the RTTY FIL knob on the front panel seems to return the settings to the
> default values (170/2125). So e.g. TPF is unusable or at least cumbersome
> to use.
>
> What am I doing wrong? Or do the settings to activate TPF have to be only
> default?
Hi Tapani,
you are doing nothing wrong, that's just how it is.
The RTTY filter in the 756Pro series (any) defaults to 2125 (high) tones, no
way to change it. If your modem is wired or set up for low tones you just
cannot use this filter. That's all.
So either check if the PK-232 can be set to high tones/170Hz shift, or don't
use the TPF with the PK-232.
73,
Ekki, DF4OR
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