Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

Actually, the large mainframe would have been a DTE as well. It is the modem that is the DCE. The specification is really one for connecting things to modems. Initially PCs used 25 pin connectors and they were fairly rare in using them with the correct gender, male (as defined by the pins)

Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

I am not Eric, but the pins are 1, 2, 6, 8 and 9 - those all might have drivers in the amplifier. I would suggest that you not break off the pins unless you have a cable with formed and sealed backshells. If you can open the backshell, just cut the wires on the 'backside' of the connector.

[Elecraft] K3S RS232 "Y" Connector causing port conflict

Hi Eric, Sorry I'm late replying to your post. If I read your post correctly, the K3S already has the ability to communicate with the computer thru the USB port, AND echo the same data through the RS232 port to the amplifier. In fact, after digging through the CONFIG Menu I found that

[Elecraft] K3S RS232 "Y" Connector causing port conflict

One more question Eric. If I need to block the TX lines from the amplifier to the K3, which pins should I break off of the male DB-9 connector? Thanks again for your help. Charles K5UA __ Elecraft mailing list Home:

Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

The pins are normally pressed into the connector. If you can open it, you can usually pull them out. That way you can test non-destructively. OM2500A only uses RxD, TxD. It does not assert any other lines. RTS & DTR are wired straight through, I haven't checked DSR & CTS for continuity. I

Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

OM2500A must have frequency data, unless you are manually tuning it. On 12/15/2015 3:45 PM, char...@k5ua.com wrote: In fact, after digging through the CONFIG Menu I found that setting AUTOINF to AUTO 1 will send band data on its RS232 port!!

Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

Josh, You should not refrain from posting information about this amplifier and its characteristics. Perhaps I have monopolized the conversations with basic information about RS-232 and its characteristics (and limitations), but I know nothing about that specific amplifier. I can only talk

Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

If you need to block the TX lines from the amp to the K3 (or from the amp to the P3's computer connection if that is also in the system) making a custom cable or taking a M-F 9 pin adapter with the proper pins broken off can make it easy.) The key thing to remember with RS-232 is that while

Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

Charles, At this point, it seems like a silly question. BUT... have you tried connecting it as the manufacturer (OM-POWER) suggests? If so, what happened? So far we know that you have tried using some Y-splitter on the RS-232 line. It didn't work, and Don provided a clear and detailed

Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

The OM2500A has 2 serial ports. It is designed to be patched inline between a computer and the K3. 73, Josh W6XU Sent from my mobile device > On Dec 14, 2015, at 5:11 AM, Don Wilhelm wrote: > > Charles, > > I don't know the specifics of your OM2500A amplifier, but I

Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

Charles, I don't know the specifics of your OM2500A amplifier, but I do know about RS-232. First, RS-232 is a point to point system. The use of "Y" connectors is not the norm and are applicable only under certain specific conditions. Those conditions are that the device added by the "Y"

Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

Fred KE7X From: Elecraft <elecraft-boun...@mailman.qth.net> on behalf of Don Wilhelm <w3...@embarqmail.com> Sent: Monday, December 14, 2015 1:25 PM To: char...@k5ua.com; elecraft@mailman.qth.net Subject: Re: [Elecraft] K3S RS232 "Y" Connector causing por

[Elecraft] K3S RS232 "Y" Connector causing port conflict

Thanks for the detailed explanation Don. It seems like that is what is happening, the OM2500 may be sending info back on the line into the "Y" connector, confusing Na3P on the computer end on making the OM2500 jump frequency rapidly back and forth between the correct frequency and the

[Elecraft] K3S RS232 "Y" Connector causing port conflict

Hi Steve, I had just sent my last post before reading your post. I think you are right, I failed to consider signals going from the PC back to the K3S, they would go directly to the OM2500A as well. I guess using a different virtual serial port under LP-Bridge as suggested by Larry N8LP is the

Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

Charles, You should find the amp has a driver connected to pin 2. To make sense of the signal directions, you have to know whether the device is configured as DCE or a DTE. Data Communications Equipment or Data Terminal Equipment. The 'transmit' and 'receive' signals are relative to the

[Elecraft] K3S RS232 "Y" Connector causing port conflict

How easy this would have been if Elecraft had made it possible for the K3S to communicate with the computer through the USB port _AND_ communicate to the amplifier through the RS232 Port at the same time. As I understand it, you can use the RS232 port, or the USB port, but not both. Thanks

Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

Hi Charles, When the K3S is using the USB comm port for talking bi-directionally to the computer, is is also echoing the K3S reply data out the RS232 port for Amplifiers, Steppir antenna controllers etc to listen to for band and frequency information. 73, Eric /elecraft.com/ On

Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

Charles, As Fred Cady said in a recent post, it is "all mixed up" and the safest way to check is to look at the schematic. It all depends on whether you are a DTE or a DCE device. Prior to the IBM PC, all was well defined and an RS-232 interface used a DB-25 connector. AFAIK the IBM PC was

[Elecraft] K3S RS232 "Y" Connector causing port conflict

I have an OM2500A amp that works perfectly with my K3S when it is the only thing connected to the RS232 of my K3S. I am using LP-Bridge and Na3P to create a panadapter and this works perfectly when the computer is the only thing connected to the RS232 of my K3S. The manual shows how to use a

[Elecraft] K3S RS232 "Y" Connector causing port conflict

Hi Josh, I'm not sure I understand your post. Are you saying use a single line from the K3S RS232 port to the OM2500A RS232 port labelled "TCVR", then a second line from the OM2500A RS232 port labelled "PC" back to the computer? Thanks, Charles K5UA

Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

Have you tried passing through the amp instead of using the splitter? OM-Power has two RS232 ports for computer & transceiver. 73, Josh W6XU Sent from my mobile device > On Dec 13, 2015, at 7:52 AM, char...@k5ua.com wrote: > > > > I have an OM2500A amp that works perfectly with my K3S when

Re: [Elecraft] K3S RS232 "Y" Connector causing port conflict

Yes, exactly! OM2500A should echo data through its TCVR<>PC ports to allow the computer to directly communicate with the K3. 73, Josh W6XU On 12/13/2015 1:46 PM, char...@k5ua.com wrote: Hi Josh, I'm not sure I understand your post. Are you saying use a single line from the K3S RS232