Re: [amsat-bb] DSP-2232 Problem

["Andrew Rich" <vk4tec@xxxxxxxxxxxxxxxxx>]

The fact you are getting something to the DSP2232 means you do not 
have a total break.

There are serveral things that could be going wrong

UART in your PC
UART in the DSP-2232
Cable in between
Low volts to either
Randon chars on the screen are a worry.

I would loop back your serial port on your PC and type
Confirm your PC is sending ok, then loop back your cable
and re-test loop back test.

If that works, you need to consider a problem with the DSP.

If you are keen open and look for crook solder joint.

Work the problem in stages.






> Folks
> 
> I have a DSP-2232 here that keeps getting confused: I get a cmd: 
prompt but
> then anything I key in isn't recognised, with assorted errors like "?
not
> enough" among others even with the most basic commands, like MYCALL 
for
> example. Random characters sometimes appear on the LCD display. 
Something's
> working somewhere as it decodes packets on the LCD and to the RS-232 
port.
> 
> Sometimes I can get it to reset, but always at the wrong moment it 
won't
> reset: it often won't even accept the RESET command.
> 
> I'm almost always operating it in 1200bps VHF packet (modem 12).
> 
> The firmware is Dec 1993 ver 7.0.
> 
> All help graciously received.
> 
> 73, Howard G6LVB
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