Showing posts with label digital. Show all posts
Showing posts with label digital. Show all posts

Wednesday, September 11, 2013

Figuring out the Master Band Plan

Now that I've started to go digital, one of the key things is to figure out the digital band plan. I have plans to eventually do something really neat with this, but here's a rough idea of what the band plan is for Digital modes. I'm going to focus on 20m, as most of them are similar to it, and include the links for the other information.

At the highest level is the FCC rules:

14.000-14.150 MHz- Digital Modes (CW included)
14.150-14.350 MHz- Analog Modes (SSB included)

The next level seems to be the ARRL band plans, which are actually quite complete for VHF+, but seem to lack a bit in the details for HF bands:

20 Meters (14.0-14.35 MHz)

14.070-14.095 RTTY
14.095-14.0995 Packet
14.100 NCDXF Beacons
14.1005-14.112 Packet
14.230 SSTV
14.286 AM calling frequency

The next level down is CIARC, which provides some really good detailed information on digital modes, but is still a bit lacking.


Mode Specific Dial Freq Center Freq Offset
PSK31
14.07 14.07015
Olivia Olivia 16/500 14.073.65 14.0744 750
Olivia Olivia 32/1000 14.1055 14.1065 1000
JT65
14.076

Olivia Olivia 16/500 14.07765 14.0784
Olivia Olivia 32/1000 14.1055 14.1065
Olivia Olivia 32/1000 14.1065 14.1075

The ultimate band plan seems to be bandplan.com, but this has a bit too much detail, including nets, etc.

I'm going to put together a master band plan, that includes everything I can find, and piece it together here. Hopefully it will be of some use to the community out there!

Saturday, September 7, 2013

Working JT9/JT65

In my working with digital modes, I have started with JT9/JT65. I've found them to be rather relaxing modes, you can easily do something else while you are talking, and just get back to the conversation every two minutes. I'm hoping to give a bit of an idea of how these two modes work, and what should be done to improve communications on the subject.

Saturday, August 31, 2013

The Digital Leap

I've been slowly noticing more and more my limitations of being able to get those rare DX stations attention, and noticing RFI issues. I was convinced to give digital amateur radio a shot recently, and had a good collection of notes from my efforts to go digital.