HRD and Ptt with a 746 pro

[KA7FTP]

I have an Icom 746 pro and use a Rigblaster PnP to interface to my computer. I have a CI-V cable as well as a data socket cable connected to the on the 746. I am running HRD (v4) and DM 780 for psk.

HRD keys the Ptt using a command over the CI-V line. The transmit and receive audio connects to the radio via the data socket. The problem being, is that that 746 will only accept the audio from the data socket if the ptt is activated using the ptt line on the data socket, which HRD does not do.

So, is it possible to get HRD to key using the wired connection on the data socket and not the software command? I have tired to change the ptt config using the ppt over com, but that doesn't work.

I can run DM 780 in a stand alone mode and it works fine keying over the data socket. Although I'd rather run HRD to get the remote control functions and frequency readout.

73

len

[W4PG]

The problem being, is that that 746 will only accept the audio from the data socket if the ptt is activated using the ptt line on the data socket, which HRD does not do.

I don't doubt what you say, but that certainly seems very strange on the part of the 746. Can you set the 746 to accept input from the data socket, rather than the mic? I run an IC-7800 and can set the input to either the mic or data socket, depending on what I want to do. I wonder if the 746 allows the same?

It just seems bizarre that you can key the PTT with the CI-V line, but the 746 won't recognize the audio coming into the data socket. Something just doesn't seem right there, but not having a 746, I can't say. This is strange . . .

............Bob

[KA7FTP]

If you look at the schematic of the 746 you can see that the mic audio comes into a preamp IC1400. The data audio comes in at the junction of IC1401, but before the data audio comes in it passes through a switch, IC1310 at which point it can be routed to a different path to decode the RTTY signal.

In other words the mic and the data jacks are just not copies of each other. The data jack has switchable routing through IC1310 depending on how it's used. The ptt line routes the signal differently based upon mode, RTTY vs. D SSB.

The issue here is not with the radio, it's designed to work that way.

I just need to know if HRD will allow me to change the PTT control from CI-V to the com port, and how?

73

[KA7FTP]

Just an update here for anyone using the same setup.

I took a second sound card interface and am running the audio into pin 4 of the Acc 1 socket. The audio path merges in the radio just after the mic preamp and is not switched like the Data socket. I still use the CI-V interface for PTT. It would be nicer to just use the one interface, oh well.

[KJ5XX]

I have an Icom 746 pro and use a Rigblaster PnP to interface to my computer. I have a CI-V cable as well as a data socket cable connected to the on the 746. I am running HRD (v4) and DM 780 for psk.

HRD keys the Ptt using a command over the CI-V line. The transmit and receive audio connects to the radio via the data socket. The problem being, is that that 746 will only accept the audio from the data socket if the ptt is activated using the ptt line on the data socket, which HRD does not do.

So, is it possible to get HRD to key using the wired connection on the data socket and not the software command? I have tired to change the ptt config using the ppt over com, but that doesn't work.

I can run DM 780 in a stand alone mode and it works fine keying over the data socket. Although I'd rather run HRD to get the remote control functions and frequency readout.

73

len

Had to read through your question a few times and I think I understand what you're asking. What I find confusing is where you say "will only accept the audio from the data socket if the ptt is activated using the ptt line on the data socket, which HRD does not do". Just to be clear and make sure we're on the same page here, first, HRD doesn't transmit (nor receive) audio, it's simply a CAT interface. DM-780 is the only program in the suite that receives or transmits audio.

That said, if you want to change HRD to go into TX on the COM port, go to Program>Options>Com Port TX. From there it gives you a number of options for selecting the COM port to use to transmit on. (although I don't see your specific ICOM rig listed).

If you're asking about how to get the digital audio transmitted by DM-780 to cause your rig to transmit that audio, go to Tools>Program Options>PTT. This will allow you to choose either a COM Port, HRD, or your Soundcard/VOX to key the rig.

Other than this, all of the CAT commands exchanged between HRD and your 746 should be handled by your CI-V cable.

If this doesn't help, I know that there are many IC-746 Pro users out there that are successfully using the program, so you might try posting your question here:

http://forums.ham-radio.ch/forumdisplay.php?f=19

This is the Icom portion of the HRD User's Forum.

Good Luck - I'm confident that these guys can get you figgered out!

[KJ5XX]

Len:

Here are a couple of threads that may be helpful to you:

http://forums.ham-radio.ch/showthrea...highlight=icom

http://forums.ham-radio.ch/showthrea...746+rigblaster

http://forums.ham-radio.ch/showthrea...&highlight=746

http://forums.ham-radio.ch/showthrea...&highlight=746

Good Luck!

[KA7FTP]

Thanks, I'll look at the threads.

Right, I use DM780 to produce the audio. I run it under HRD for the PTT and rig control.

I did try and change the set up to use the com port, it didn't work.

Hope that makes things more clear.

[KC7OO]

I have been using the 746 pro for some time now with CIV and the data interface cable. I am trying to understand what is happening from what you said, so could it be as simple as you are not holding the SSB button in for one second? That switches it to digital mode.

[DL1OLI]

Hi,

I have a IC7400 that is the European version of the 746pro.

I also use HRD, a insulated audio interface and a CAT to USB cable. But my audio goes to the ACC(1)socket not the data-socket. The data socket did not work for me.

Maybe that is the problem ?

vy 73 Oli, DL1 OLI

[KJ5XX]

Len:

Just came across this recent post on the HRD Forums that may be useful to you.

It has to do with the IC-756, but I think it may apply to your 746 as well.

73,