D-Star Transmit Issue

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  • Problem
  • Updated 3 weeks ago
I'm using a Flex 6300 and a newly constructed Elecraft XV144 transverter, and am trying to connect to the local D-Star repeater, but am not having any luck.

I can receive just fine, so I assume the dongle is working properly. When I transmit, I don't seem to be getting out on the repeater, and when the repeater replies with its data, the "called" field is blank.

I've attached a screenshot of the DSTAR Waveform window. The first item is the response from the repeater after my transmission.

Does anyone know what I might be doing wrong? Thanks!

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Ben Sinclair

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Posted 3 years ago

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Photo of Alex - DH2ID

Alex - DH2ID, Elmer

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1. Do you have a portable D-Star TRX or an OM with D-Star near you?
    What does it show if   you contact it or him directly?

2. What does http://www.dstarusers.org/viewrepeater.php?system=KD0IAN show?

Your repeater does not show your callsign. Are you sure you transmitted on the correct frequency and with the correct settings?



73, Alex DH2ID
(Edited)
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Mark - W3II

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The following link walks you through registering your call sign with DSTAR.

http://www.dstargateway.org/D-Star_Re...
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Ben Sinclair

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I am registered, and have been on D-Star many times before with my 51 and 7100, but I no longer have them to test with.

If I wasn't on the correct frequency, I wouldn't think it would respond at all. I did listen on the input frequency using another non-D-Star radio, and I can hear myself (the data stream anyway).

I have a buddy that can help listen and see what he gets, so I'll try that next!
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Mark - W3II

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I am connected to KD0IAN C with a DV Dongle if you want to try again. 
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Ben Sinclair

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I'll try again right now!
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Ben Sinclair

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I just called again, and I saw the repeater come back with the blank "called" field. Did you see anything?

C is connected to the reflector, so I waited until those guys were done talking first!
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Mark - W3II

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No I dd not see your call sign appear.
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Ben Sinclair

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Well, I'll give it a try on simplex with a friend and see what we get. Thanks for looking for me on there!
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Lawrence Kellar KB5ZZB

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I had to set my Tx eq to OFF for my repeater to recognize me
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Ben Sinclair

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Wow, that did it! Thanks!
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Alex - DH2ID, Elmer

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Yeah, that was an easy solution that I totally missed ;-)
I have a D-Star profile without equalizer. 73 es HNY!
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Ron Parsons

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I am having the same problem. My system is a Flex-6500 with a DEMI 2m transverter. When I press PTT, my system transmits on the repeater input frequency, but the repeater does not send any output until I stop transmitting, and then the repeater transmits a short burst with the called field filled with *******.

My guess is that the transverter has a short delay in producing output and the first few bytes of the packet might be dropped.

I turned off TX EQ but no luck.

Ron W5RKN
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Lee Maisel

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The radio or dongle, or software, whatever is TRUNCATING the beginning of the transmission, in other words, your ID string at the beginning of transmit is being generated, but the radio is late in transmitting, so that portion ends up not sent.   The repeater rejects it because there is no ID.  Hence the ************  AN aggravating problem that I would love to see resolved.  Maybe flex can fix this top where there is a short 1/2 second delay buffer to ensure all is transmitted?????
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Tim - W4TME, Customer Experience Manager

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I have entered this problem report into our bug tracker as issue #4613 for additional investigation. Thank you for the defect report.
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Cal Spreitzer

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Tim,

FYI,  I reported this problem 3 months ago...  it was assigned bug tracker issue #4400.  Here is link to my thread regarding this:

https://community.flexradio.com/flexradio/topics/hf-dstar-with-ssdr-beta-v1-10-8-issue

This all is related and I'm eagerly awaiting disposition. 

Best regards,

Cal/N3CAL


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Tim - W4TME, Customer Experience Manager

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I have linked the two reports in the bug tracker.
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Lee Maisel

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Hi, It's been almost a year.  Is this EVER going to be fixed?  All it would take is a small change in the D-star waveform to delay sending for a half second or so (possibly even less) after exciting the transmit.   It's obviously chopping it off before it gets out.  Otherwise, I merely wasted money on the dongle I purchased from you,.
Thanks!
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Lee Maisel

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And not even a response.  It's a simple fix!
(Edited)
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Bill -VA3WTB

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What is the exact fix? and how is it done?
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Volker Geith

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Would be nice to have current status as here as I plan to use DSTAR with my 6600. Already bought the dongle for it.

73

Volker
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W9WLX-Chuck

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When in D-Star mode, make sure your low cutoff on the transmit bandwidth is set to 0.  The first 100 Hz is where the data stream is for your call.

Chuck, W9WLX

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Tim - W4TME, Customer Experience Manager

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 We are aware of all the D-Star issues and the defect is in a scheduled milestone to be addressed.
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Lee Maisel

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Bill -VA3WTB, the fix is that a small delay /buffer needs to be added in. the initial bits are being truncated.  A minor delay buffer would fix this easily.
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Lee Maisel

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crickets......