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Pactor

Glenn Depp
Glenn Depp Member ✭✭
edited May 25 in Third-Party Software

Am I reading this correctly with the 3.2.31 version.

(#G6938) Operation with Pactor modems will not work properly in v3.2.31. Pactor operation is functional in v2.4.10.


Are external Pactor modems no longer supported?

Answers

  • K6OZY
    K6OZY Member ✭✭
    edited May 7

    I have not been able to use my Dragon DR7800 for years ever since the switch to v3. I just tried again tonight on 3.2.31 and still no success. I see the other side respond back but the sync is off ever so slightly and it won't connect. I have always set AGC to off. The current settings I'm using are below. I have all but given up on the hope that I'll ever be able to use my Pactor modem on my Flex 6700, just like my D-Star dongles. I paid for a v3 upgrade, and it broke things I depended on for MARS. So frustrating. I've told Flex about this for a very long time and there has been ZERO work on fixing this.


  • Mr Radio
    Mr Radio Member ✭✭

    I have had the same experience with my 6700 and possibly similar problems exist with other SDR radios due to processing delays and synchronisation. I made a permanent setup with my SCS Pro II and Kenwood TS 480 and this setup works fine. There were similar reports about this matter in the past.


    Tom

  • Bill AB7AA
    Bill AB7AA Member ✭✭

    Has this timing problem improved with the latest version V3.2.34? It was supposed to have improvements.

    Bill AB7AA

  • K6OZY
    K6OZY Member ✭✭
    edited May 7

    No. I tried again after the update. No version 3 has worked with pactor. The fact that it worked fine in v2 and not in v3 means it can work. They just need enough of us to motivate them to put real effort into figuring out why.

  • DH2ID
    DH2ID Dr.med. Member ✭✭

    I have been working PACTOR for years as an EMCOMM station with my Flex-3000. I've also tried it with my Flex-6500 and it works with SmartSDR 2.6. (I'm not going to version 3, as I don't need the extra functions). With my local EMCOMM group I did extensive testing with PACTOR/VARA and ENVIS antennas. The result ist that we changed over to VARA-HF, which works well with WinLink and all TRX, which have soundcard access (FlexRadio, ICOM etc.).

    I had to make my own cables for the P4dragon<>FlexRadio connection, of course. There seem to be cables by Farallon electronics in the U.S., also.

    Vy 73, Alex - DH2ID

  • K6OZY
    K6OZY Member ✭✭

    Hi Alex,

    That is the big reason I'm frustrated. It was working with v2, and why would anyone expect it to break features moving to v3? I spent good money for all the cables to attach the P4Dragon to my Flex 6700, plus the Flex 6700 was my choice for MARS work because of the TX filtering. All of this is wasted if they do not fix this. I do use VARA HF as well on the ham bands, but for MARS, we use pactor, or at least my colleagues do. 😐️

  • Bill AB7AA
    Bill AB7AA Member ✭✭

    I too was going to hook up my P4 Dragon to my 6700 but will hold off until someone reports that they have fixed the timing issue.

    Bill AB7AA

  • SorenB
    SorenB Member
    edited May 24
    I will buy a P4 Dragon with Ethernet? Where can I find a schma for the cable P4 Dragon and a Flex6600?
  • Kevin WM4J
    Kevin WM4J Member ✭✭

    I just got a P4 Dragon DR-7800 and got it up and running tonight. I'm using firmware 2.7.3 and it is working fine for me. When I first set it up I had a similar issue as K6OZY. It would attempt to connect and I could hear the RMS gateway responding, but my station just kept transmitting attempts like it didn't hear it until the connection eventually failed.

    What worked for me was checking the "Longpath mode allowing extra signal latency (Needed for some Flex radios)" check box. I played around with the "TX Delay" and "CS Delay" but I wasn't able to reliably connect until I checked the "Longpath mode" check box.

    Here are my settings:

    Even if you are on Firmware 3.x it might be worth trying the "Longpath mode" check box if you haven't already.

  • Mr Radio
    Mr Radio Member ✭✭

    There is a new version (2.4) of software for Dragon DR 7800. SDR radios are expected work better, as there is some improvements in relation to delays typical for SDR radios.

  • Kevin WM4J
    Kevin WM4J Member ✭✭

    The 2.40 version P4 Dragon firmware didn't resolve the issue for me. Even with the 2.40 firmware installed I require the longpath option configured to be able to connect to any RMS gateway or any other station P2P.

    The longpath option adds an additional 150ms to the normal cycle and 450ms to the long cycle (Normal Cycle is 1.4s with longpath vs 1.25s without, Long Cycle is 4.2s with longpath vs 3.75s without). Longpath is meant to compensate for long distance propagation delays, but it works well to compensate for the Flex latency delays as well. I only see two caveats to using longpath:

    • With Longpath enabled you take a slight performance hit because the cycles are longer, about 10%. I'm OK with the performance hit since Pactor is still faster for me than Vara HF even with longpath enabled and my local Auxcomm group has standardized on Pactor.
    • Longpath can only be set by the calling station. When connecting to an RMS gateway this isn't an issue since all sessions are initiated from my station with longpath set. With P2P however this isn't always the case. I am able to connect P2P when I initiate the connection because I have longpath set. When another station calls me P2P and they don't have longpath set they can't connect to me even though I have it set. It can't be specified by the receiving station. Once the station calling me enables longpath they are able to connect with me.

    I contacted SCS and they confirmed that there is no way to force longpath from the called station.

    I also opened a case with Flex and they indicated they were aware of the issue with Pactor modems and actively working it, SCS mentioned they were working with Flex as well when I contacted them.

    I also upgraded my Flex 6400M to firmware version 3.2.39 and I'm able to connect with longpath set. Here are my settings on Flex firmware 3.2.39:

    These settings were the lowest latency settings I could reliably connect with. The TX Delay and CS Delay can be set higher but with presumably additional latency.

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