Re: [amsat-bb] RE: Station Program es 847

[Bill Richarz <wricharz@xxxxxxxx>]

You can buy a 9 pin null modem adapter at Radio Shack.

de Bill, N4DH

At 10:04 6/21/01 -0500, Estes Wayne-W10191 wrote:
>Maggie wrote:
>
>There's a known issue with early 874s (serial numbers prefixed lower than 
>8G05xxxx) being unable to respond to attempts to *read* the freq/mode 
>status of the radio; any software that depends on that function working 
>will have trouble with the early units. There's a firmware upgrade 
>available from Yaesu to resolve the issue.
>
>Wayne replies:
>
>This is true, but The Station Program doesn't read the frequency from the 
>FT-847.  It only writes frequencies to the FT-847, so it should work fine 
>with early FT-847 firmware.  The Yaesu Doppler tuning algorithm in The 
>Station Program was written for the FT-736 which doesn't have "read 
>frequency" capability in its CAT interface.  The source code for The 
>Station Program was lost before the FT-847 came on the market, so VP9MU 
>was not able to add "read frequency" capability to his Yaesu tuning algorithm.
>
>I once had a serial problem with my FT-847 when I used a home-made serial 
>cable that only connected the 3 wires specified in the FT-847 manual.  It 
>worked fine on one computer, but it didn't work on a different 
>computer.  The symptom was the same as what KQ6EA reported.  The CAT icon 
>would light up, but the radio wouldn't tune.  I still don't know why, but 
>I solved the problem by making a cable that connects all 9 pins (with pins 
>2 and 3 swapped, of course).  Minor rant: Why is it so hard to buy a 9-pin 
>null-modem cable?  There are tons of 25-pin null-modem cables in stores, 
>even though it's been many years since 25-pin connectors were widely used 
>for serial ports.
>
>By the way, InstantTrack/InstantTune and SatPC32 provide much more 
>versatile Doppler tuning for the FT-847 because they DO read the frequency 
>from the radio.  You tune the radio normally, and Doppler tuning resumes 
>as soon as you quit tuning. I don't like the way The Station Program 
>forces me to tune across a transponder with mouse-driven sliders.  Part of 
>my problem is that with my Pentium-90 the tuning sliders become jerky when 
>the map is displayed.
>
>Wayne Estes W9AE
>Mundelein, IL, USA
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de Bill N4DH
AMSAT # 32372
Charlotte, NC

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