[nos-bbs] from Brett F - Setting up for basic radio.

[Glenn Thomas]

Also, a problem I had (at 9k6 packet anyway) was the last bit or so of a 
packet being cut off because TXTAIL was too low. Dunno what your 
situation is, but that's something to take a look at.

73 de Glenn wb6w

On 3/27/2012 10:16 PM, Bill Vodall wrote:
> Hello Brett...
>
> The listserver blocked your messages because of the size.  There still
> may be somebody out there (I hope!!!) downloading these messages at
> 1200 baud with real TCP/IP on RF so we better not let them go through.
>
> Note that each of the 3 messages was right around 3 megabytes.   Add
> to that the magic of email where the messages are 7 bit encoded for
> ASCI transmission and it might get another 50% larger.
>
> I don't have selective control of what to do with the message so all I
> can do is attach it here.
>
> If you're varying the TXD between .25 and .5 seconds and it's not
> making a difference, I'd wager that isn't your problem.  Most nodes
> should work at .25 and it's very seldom any packet station is not
> going to work at .3 seconds or greater.
>
> 73
> Bill - WA7NWP
>
>
> --- from Brett --
>
> I did some more testing tonight. I tried connecting to a couple
> different nodes and still nothing. So then I took some recordings of
> my packets with another receiver. My apologies for the bad quality.
> The static does not exist in my transmissions, just artifacts of
> recording.
>
> All three recordings are while trying to connect to a local network
> node, WISS, by entering "c radio wiss" at the jnos command prompt.
>
> The first recording is with normal settings and the following autoexec.nos:
>
>      ax25 mycall KC9MWG
>
>      attach asy ttyS0 - ax25 radio 4096 256 4800
>
>      ifconfig radio description "vhf - 1200 baud port"
>      param radio 2 256
>      param radio 3 1
>      param radio 5 0
>      param radio TxDelay 25
>      #ax25 bctext "my packet station"
>      #ax25 bcinterval 1200
>      #ax25 bc radio
>
>      ax25 retries 3
>
>      start ax25
>
> For the second recording I changed the TxDelay to 50 in the autoexec file.
>
> For the third recording I changed TxDelay back to 25, then changed the
> internal tnc setting txd. Txd "Sets the length of time between the
> radio PTT being activated, and the packet
> audio being generated. Duration is in bytes, where each byte is about
> 7ms." from the TT4 manual. This setting defaults to 30, for the
> recording I changed to 100.
>
> I am attaching the recordings to this message, hopefully the list
> won't remove them. My apologies to anyone whose inbox gets overwhelmed
> with the ~6.5 Mb.
>
> Again thanks for the help.
> Brett
>
>
> P.S. baudrate matched at 4800bps.
>
> _______________________________________________
> nos-bbs mailing list
> nos-bbs at tapr.org
> https://www.tapr.org/cgi-bin/mailman/listinfo/nos-bbs
>
>