Hi Tom - just a quick note to let you know that I use an old IBM 380ED (not sure what the difference is between it and the 380D) with the K2 and thankfully have not experienced the "flaky" communication problem that you are having. I also use it with the Yaesu Mark V and again no problems.
Just FYI - I'm using XMLog as well as N1MM Logger and both communicate well in both directions using the 380ED as well as with a 2.4 gig P4 laptop that gets moved around. A shot in the dark, but on occasion, I have noted problems reported by others on other reflectors related to some specific piece of software and the "polling" speed and the timing issues involved when used with various radios. Also note are problems with the settings of serial port in terms of speed, parity, etc. Maybe this is an issue with the software and not your faithful 380! 73 -- Don N4HH ----- Original Message ----- From: "Tom Hammond" <[EMAIL PROTECTED]> To: <elecraft@mailman.qth.net> Sent: Monday, June 13, 2005 9:10 AM Subject: [Elecraft] KIO2/KPA100 Serial Comm Problems > Hi Folks: > > For quite a while I've blamed my KIO2 _and_ my KPA100 (s/n 0008) for some > serial communications problems I've been experiencing... I can SEND data to > the PC with no problem, BUT I cannot RECEIVE data FROM the PC... > > Today, while getting a local's K2/100 (s/n 4224) ready for Field Dat (and > PC logging) I think I've determined that the problem may not be my K2, but > the PC! > > The PC I've been using as an IBM ThinkPad 380D Laptop which USED TO > communicate very reliably with the K2... however, since about a year ago, > communications have been 'flakey' at best... sometimes on, sometimes off... > with no rhyme or reason (that I've been able to determine) to the failures. > > I've now tried this laptop with two K2/100's and two different serial > cables of my manufacture and verified to be properly wired (in case someone > wants to ask). Serial comms work fine if the K2 is sending data, but fails > if the PC is sending it back to the K2. > > I'm beginning to thing that maybe (and I've not yet scoped it to confirm) > that the signalling voltage on the RXD (K2 side) line may be marginal and > that the serial adapters in the KPA100s just can't quite decode the voltage > changes. Guess I'll hang a scope on it later today and see what's going on > there. > > Last time I did this, I HAD data going into the MAX1406 (pin 6, R3IN/RXD), > but nothing coming out on R3OUT/K2 RX, which tends to imply that the > MAX1406 wasn't (or couldn't) decode the incoming data for one reason or the > other. I swapped out the MAX1406 and there was no change, BUT then, > sometime a bit later, all of a sudden serial comms picked back up and all > was well... and no, I'd not changed anything. At that point I blamed myself > for a poorly soldered connection somewhere in the serial comms section, BUT > since the problem also shows on a completely different K2, I now absolve > myself of that onus. > > Has anyone else experienced a serial comms problem with their Laptop PC? I > know some Laptops tend to use RS232 voltages quite a bit less than those > used on desktop PCs, voltages which might cause problems under certain > circumstances. > > Suggestions are ALWAYS most welcome. > > 73, > > Tom Hammond N0SS > > > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.323 / Virus Database: 267.6.9 - Release Date: 6/11/05 > > -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.6.9 - Release Date: 6/11/05 _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
