packet radio getting ready! john h. green wb4moz [email protected]...
TRANSCRIPT
Packet RadioPacket RadioGetting Getting Ready!Ready!
John H. Green WB4MOZJohn H. Green [email protected]
wb4moz.mooo.comwb4moz.mooo.com
(wb4moz.home.comcast.net/~wb4moz/)(wb4moz.home.comcast.net/~wb4moz/)
Packet Radio – Getting Ready.
There are several ways to get on Packet today.
RF
Internet
Packet Radio – Getting Ready - RF
Basic User Station – Several components make up a typical user station:
- Terminal – can be a PC with a terminal program or a dumb terminal.
- TNC – can be a simple TNC, multimode, dual port, 1200b / 9600b, etc., or a sound card interface. We’ll use a tnc here as a sound card uses different software.
- Radio / Antenna – appropriate for the operating band and data speed.
Terminal TNC Radio Antenna
Packet Radio – Getting Ready - RF
Once you have all the components lets set them up. Connect the computer to the tnc and startup the terminal
program. Some tnc’s use n81 and some use e71. Some tnc’s use switches for baud rate and some use
autobaud. Set the switches and term to the same baud – 9600 is usually good. Turn on the tnc.
If autobaud is used set the term. Program to 9600 and turn on the tnc. When clear text displays enter the appropriate character – usually an asterisk (*)
Packet Radio – Getting Ready - RF
If all goes well you should see the tnc boot:
TINY-2 MARK-2 Packet Controller (c) Copyright 1985-1994 PacComm Technical Support - (813) 875-6417
AX.25 Level 2 Version 2.0 Features: KIPacCommSS PERSONAL MESSAGE SYSTEM CLOCK CHIP SUPPORT Expanded NMEA 183 (GPS) SUPPORT
Release 3.2b August 24, 1994
cmd:
Packet Radio – Getting Ready - RF Now that we have the tnc talking to the computer lets
make it ours: At the cmd prompt enter my – the response should be
MYcall NOCALL or whatever call is in the tnc. Enter my callsign-ssid. Response - MYcall was NOCALL Enter txd 30 Enter sl 15 Enter per 15 Enter maxf 3 (range is 1 to 7) There’s lots more (entering disp will display all
commands) but this will get things going..
Packet Radio – Getting Ready - RF
Now lets hook up and turn on the radio – tune to 145.030 (145.630 for 9600b) simplex – no tone. If possible use a dummy load. We’re assuming the proper cable is used.
Enter cal and cause the radio to tx. Set the deviation to 3.5 to 4.5 khz. Change the tone and adjust if needed.
If no service monitor is available a rough setting follows. Using a second receiver adjust the volume by listening to someone for a reference level. Put the tnc into cal and tx. Adjust the tnc deviation control until a noticeable reduction in volume is heard. Adjust up slightly – tone should sound smooth with no harshness. Check the second tone and adjust if needed. Note – not for 9600b.
For 9600b set the deviation to 1.8 – 2.0 khz.
Packet Radio – Getting Ready - RF
If the tnc to radio connection is a data one then ignore this part.
Set the rx volume by opening the radio squelch. Start with the vol off. Bring the vol up slowly till the tnc
dcd led is on solid – go up just a little more. Now, adjust the sq till the dcd led just goes out and stays out.
Now that everything is adjusted and calibrated we’re ready to try it.
Packet Radio – Getting Ready - Internet
In the past several years G8BPQ has released/updated several programs that allow one to use the internet to access the packet network. Among those are:
A telnet interface to bpqnode. A web page interface to bpqnode A tcp term program (bpqtermtcp.exe) A tcp term program for Android
OK, let’s see what we can do with it.. Goto the Packet Radio – Using It presentation.
Packet Radio – Getting Ready.
I hope to have bpqtermtcp.exe, bpqterm android and these presentations available on my web site:
Wb4moz.mooo.com (wb4moz.home.comcast.net/~wb4moz/) Click on the Amateur Tab.