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K3 / P3 with SteppIR

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Larry Gerhardstein

K3 / P3 with SteppIR

I have a K3 / P3 / SteppIR SDA100. Everything is set to 38400 baud. I
have connected a Y-cable to the RS232 connection on the K3. One side of
the Y is connected to the SteppIR controller with a null modem inserted
(as directed by SteppIR instructions). The other side is connected to
the XCVR connection on the P3. Both work, but not at the same time.
Unplugging one of the Y connections makes the other work, and visa
versa. Any ideas? Perhaps there is a special & splitter that will
provide the necessary isolation?? Or perhaps I need to orient the Y a
different way??

Larry W7IN

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David Christ

Re: K3 / P3 with SteppIR

I suspect that the problem is that you have two transmitters on the RS232 circuit. Maybe you can find some help in this similar situation.

<http://elecraft.365791.n2.nabble.com/K3-Edgeport-Adapter-with-K3-and-SteppIR-td4819889.html>

David K0LUM

On Apr 2, 2014, at 3:52 PM, Larry Gerhardstein <[hidden email]> wrote:

> I have a K3 / P3 / SteppIR SDA100. Everything is set to 38400 baud. I have connected a Y-cable to the RS232 connection on the K3. One side of the Y is connected to the SteppIR controller with a null modem inserted (as directed by SteppIR instructions). The other side is connected to the XCVR connection on the P3. Both work, but not at the same time. Unplugging one of the Y connections makes the other work, and visa versa. Any ideas? Perhaps there is a special & splitter that will provide the necessary isolation?? Or perhaps I need to orient the Y a different way??
>
> Larry W7IN
> ______________________________________________________________
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Larry Gerhardstein

Re: K3 / P3 with SteppIR

David, that probably is it. My Y-device shows ohm meter continuity on
all 9 pins. For the required isolation, at least one pin should show open.

Larry W7IN

On 4/2/2014 21:26, David Christ wrote:

> I suspect that the problem is that you have two transmitters on the RS232 circuit. Maybe you can find some help in this similar situation.
>
> <http://elecraft.365791.n2.nabble.com/K3-Edgeport-Adapter-with-K3-and-SteppIR-td4819889.html>
>
> David K0LUM
>
>
> On Apr 2, 2014, at 3:52 PM, Larry Gerhardstein <[hidden email]> wrote:
>
>> I have a K3 / P3 / SteppIR SDA100. Everything is set to 38400 baud. I have connected a Y-cable to the RS232 connection on the K3. One side of the Y is connected to the SteppIR controller with a null modem inserted (as directed by SteppIR instructions). The other side is connected to the XCVR connection on the P3. Both work, but not at the same time. Unplugging one of the Y connections makes the other work, and visa versa. Any ideas? Perhaps there is a special & splitter that will provide the necessary isolation?? Or perhaps I need to orient the Y a different way??
>>
>> Larry W7IN
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
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>
>

Mike K2MK

Re: K3 / P3 with SteppIR

In reply to this post by Larry Gerhardstein

Hi Larry,

One leg of the Y cable attaches to the SDA100. The other leg of the Y cable attaches to the PC connection on the back of the P3. Then the separate RS232 cable supplied with the P3 goes between the XCVR connection on the P3 and the RS232 connection on the K3.

73,
Mike K2MK

Larry Gerhardstein wrote

I have a K3 / P3 / SteppIR SDA100. Everything is set to 38400 baud. I
have connected a Y-cable to the RS232 connection on the K3. One side of
the Y is connected to the SteppIR controller with a null modem inserted
(as directed by SteppIR instructions). The other side is connected to
the XCVR connection on the P3. Both work, but not at the same time.
Unplugging one of the Y connections makes the other work, and visa
versa. Any ideas? Perhaps there is a special & splitter that will
provide the necessary isolation?? Or perhaps I need to orient the Y a
different way??

Larry W7IN

Larry Gerhardstein

Re: K3 / P3 with SteppIR

I solved the problem by removing pin 2 from one side of the null modem
between the K3 and SDA100. Now turning the K3 frequency tuning knob
results in correct frequency display on both P3 and SteppIR controller.
The pin was easily removed with a pair of needle nose pliers. I can now
get on to more rewarding activity. Tnx all.

Larry W7IN

On 4/2/2014 22:00, Mike K2MK wrote:

> Hi Larry,
>
> One leg of the Y cable attaches to the SDA100. The other leg of the Y cable
> attaches to the PC connection on the back of the P3. Then the separate RS232
> cable supplied with the P3 goes between the XCVR connection on the P3 and
> the RS232 connection on the K3.
>
> 73,
> Mike K2MK
>
>
> Larry Gerhardstein wrote
>> I have a K3 / P3 / SteppIR SDA100. Everything is set to 38400 baud. I
>> have connected a Y-cable to the RS232 connection on the K3. One side of
>> the Y is connected to the SteppIR controller with a null modem inserted
>> (as directed by SteppIR instructions). The other side is connected to
>> the XCVR connection on the P3. Both work, but not at the same time.
>> Unplugging one of the Y connections makes the other work, and visa
>> versa. Any ideas? Perhaps there is a special & splitter that will
>> provide the necessary isolation?? Or perhaps I need to orient the Y a
>> different way??
>>
>> Larry W7IN
>
>
>
>
> --
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Eric Swartz - WA6HHQ

Re: K3 / P3 with SteppIR

Administrator

In reply to this post by Larry Gerhardstein

Also, when a P3 is communicating with the K3, the RS-232 Y connection cable to
the Steppir and computer should be used at the P3 computer connector, not at the
K3. That will hide the internal P3-K3 data comms form the steppir controller.

Eric
elecraft.com

On 4/2/2014 2:50 PM, Larry Gerhardstein wrote:

> David, that probably is it. My Y-device shows ohm meter continuity on all 9
> pins. For the required isolation, at least one pin should show open.
>
> Larry W7IN
>
> On 4/2/2014 21:26, David Christ wrote:
>> I suspect that the problem is that you have two transmitters on the RS232
>> circuit. Maybe you can find some help in this similar situation.
>>
>> <http://elecraft.365791.n2.nabble.com/K3-Edgeport-Adapter-with-K3-and-SteppIR-td4819889.html>
>>
>>
>> David K0LUM
>>
>>
>> On Apr 2, 2014, at 3:52 PM, Larry Gerhardstein <[hidden email]> wrote:
>>
>>> I have a K3 / P3 / SteppIR SDA100. Everything is set to 38400 baud. I have
>>> connected a Y-cable to the RS232 connection on the K3. One side of the Y is
>>> connected to the SteppIR controller with a null modem inserted (as directed
>>> by SteppIR instructions). The other side is connected to the XCVR
>>> connection on the P3. Both work, but not at the same time. Unplugging one
>>> of the Y connections makes the other work, and visa versa. Any ideas?
>>> Perhaps there is a special & splitter that will provide the necessary
>>> isolation?? Or perhaps I need to orient the Y a different way??
>>>
>>> Larry W7IN
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to [hidden email]
>>
>>
>
>
>
> ______________________________________________________________
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