[Icom] Pro2 question RTTY filter

[Doug Faunt N6TQS +1-510-655-8604]

   From: "WA9ALS - John" <wa9als@starband.net>
   Date: Wed, 27 Feb 2002 22:35:01 -0500

   > On Thu, 28 Feb 2002 00:13:41 +0100 "Ekki Plicht" 
   > <ekki@plicht.de> writes:
   > > Hi all,
   > > does the new IC-756Pro2 allow to choose which tones (hi or low) are
   > > used when the RTTY filter is turned on? 
   > 
   > Hi Ekki
   > 
   > I looked through my manual and saw no reference to that 
   > selection.   It
   > does indicate the pass band tuning knob becomes an IF shift 
   > funtion during RTTY operation but in trying that it only give 
   > you about 160 Hz shift.

   YES - you CAN choose LOW or HIGH tones!  Go into the menu, Exit/Set
   (hold)|Others - Find RTTY Mark Frequency - As you turn the main dial,
   you can set MARK to 1275, 1615, or 2125, and the RTTY shift width can be
   set to 170, 200, or 425.

   > If the RTTY FILTER button is on, there are no options to 
   > select different filters.  That is fixed, apparently as part 
   > of the decoder circuitry.  

   If you HOLD the RTTY filter button in, you get a screen where you can
   choose filter widths of 1000, 500, 350,300, or 250 Hz.

   Helpful, or did I miss the point?  73

Does the filter actually move?  If I do the same thing on a PRO (not a
II), as soon as I change the MARK frequency, the RTTY Filter indicator
goes off, and if I turn that filter on, MARK goes back to 2125.

If the PROII behaves differently, that's a win.

73, doug