ISS digipeater issues?

Discussion in 'Satellite and Space Communications' started by KD0KZE, Oct 21, 2016.

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  1. K9JKM

    K9JKM Ham Member QRZ Page

    Short messages make life easier for many stations whether operating via APRS-enabled HT or computer-based TNC such as UZ7HO Soundmodem and UISS or AGWPE and UISS. The computer TNC will only pass messages that match the checksum (like in no single bit errors in the message). Often a packet signal will sound good, loud and clear, but just flip one bit due to noise or fading and the checksum fails ... and no message display. Shorter messages give less opportunity for a bit error because there are fewer bits being sent. On the other hand, if you are running a hardware TNC there is a command PASSALL = ON which will display everything being received including the errors ... but you usually see enough of the message that you can figure out what was sent.

    73 de JoAnne K9JKM
  2. AD5KO

    AD5KO Ham Member QRZ Page

    I just found a really easy way to send messages on the FT-1XDR, I did this by getting frustrated and pushing every available button.. :D

    I view the station list which is easy.. then select a station, also easy, then I just hit the GM key and it creates a message to the selected station, I then select a pre typed message to go in it.

    Well, it's easier than it sounds. :rolleyes:

    There is a good looking pass coming up at 6PM Central time and I will be ready!

    This is how easy it really is, notes to self.

    Select a station from the station list.

    Hit the GM key, this creates a message to that station.

    Press A/B and scroll fixed messages list.

    Press V/M to select message.

    Hold ENT to TX the message.
  3. WD9EWK

    WD9EWK Ham Member QRZ Page

    That's similar to how the Kenwood HTs do it. You probably have to receive an APRS-formatted position packet from the other station to show up in your list, then you can pick the station for the message you want to send.

    Unfortunately, I will still be in my office for that 6pm CT (0000 UTC) pass. I'll look on later, to see how well it worked for you.

    Good luck, and 73!
  4. AD5KO

    AD5KO Ham Member QRZ Page

    Well, that's annoying. I will be out this evening with my wife, so 6pm my time is the only option. Next time!
  5. WD9EWK

    WD9EWK Ham Member QRZ Page

    Try that pass. Even if nobody is there to work, create a message to ALL, and send one of your messages. Maybe someone who gets it will answer that, and you can make a QSO.

    AD5KO likes this.
  6. AD5KO

    AD5KO Ham Member QRZ Page

    Well that was weird, as far as I can tell my station did not get digipeated at all that time, and I had a good signal.:confused:
  7. K3RLD

    K3RLD Ham Member QRZ Page

    Well, give me a week or two and I'll be trying again. I went ahead and did a test with my baofeng/aprsdroid setup again and could only get one packet of about 20 through my local igate. I also could HEAR tons of packets, but it would only decode about 5% of them. I'm expecting a D710 under the xmas tree....
    WD9EWK likes this.
  8. WD9EWK

    WD9EWK Ham Member QRZ Page

    If you get that, let me know. A cross-country ISS packet QSO is a challenge, but I'm up for it. Pass times may limit when I can try from here, but I'm game. I've worked W8LR in Ohio on the 437.550 MHz digipeater, so I know it is possible to make QSOs in that direction.

  9. AD5KO

    AD5KO Ham Member QRZ Page

    This was caused by a bad piece of coax.

    In the process of testing I have decided that I am adding more elements to the 70cm antenna, at 90 degrees to others along with a second Gamma match.
  10. AD5KO

    AD5KO Ham Member QRZ Page

    I didn't even plan for this it just came together at the right time.

    [​IMG] AD5KO-7 * 31.87850 -92.58533 00:00:03:24
    [​IMG] RS0ISS * 49.10417 7.09217 00:00:03:30
    [​IMG] NP4JV-9 * 31.36633 -110.95850 00:00:04:37
    [​IMG] WV5Y * 30.32617 -95.95717 00:00:04:55
    [​IMG] KF5TJR * 32.31217 -97.40300 00:00:06:46
    [​IMG] KC5ILO-7 * 33.59350 -95.06483 00:00:07:22
    [​IMG] WD9EWK-9 * 33.49600 -111.91717 00:00:08:11

    And thanks to KF5TJR for the gate :

    8 2016-12-12 20:16:08 2016-12-23 17:12:41 EM31QV > JN39NC 4984.9 miles 43° 2016-12-23 17:12:41 (APRS.FI)

    I really like this FT-1XDR portable!

    73, All and Merry Christmas :)
    Last edited: Dec 23, 2016

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