[Elecraft] RE: K3 - should data via the RS232 cable work?

[Robert Benedict]

Simon

  Fair enough. I'm trying to use your program to ease some on the 
kinderkrankheiten of the K3 software. I've been trying to find a way to 
use the Dual PB filter for RTTY. I have tried three approaches:

1. Mode: Data, Data Mode: A
You can transmit anywhere in the waterfall. Invoking Dual PB results in 
no receive signal - waterfall goes blank.

2. Mode rev Data, Data Mode: AFSK
There is a strange Line In INPUT filter centered at 1000Hz. If you set 
the PITCH to 915 in the K3 and your digital software, you can get a 
signal out UNTIL you invoke Dual PB, then no RF out (although you have 
receive!).

BTW - Both modes are fragile. If you leave CWT on from a previous CW 
mode they also doesn't produce RF. I have seen very inconsistent results 
which I think are due to unexpected interactions like this.

3. Data Mode: FSK
Dual PB works on receive and on send with KY command. Appears to be robust.

Since I use a laptop with my rig I have no parallel or RS232 port lines 
to trigger FSK, hence my request for a RTTY keyboard capability as the 
only way I see to use Dual PB.

    Bob
       KD8CGH