Friday, September 30, 2011

White House Staff on Amateur Radio’s Capabilities During Emergencies

From: http://www.arrl.org/news/view/arrl-briefs-white-house-staff-on-amateur-radio-s-capabilities-during-emergencies

On September 12, at the invitation of White House Cybersecurity Coordinator Howard A. Schmidt, W7HAS, the ARRL briefed several members of the National Security Staff on the capabilities of the Amateur Radio Service to communicate in emergencies. “The White House is looking for ways that the great work of Amateur Radio operators can continue to support emergencies in the future with particular attention to increased use and dependency on internet based technologies,” Schmidt said. The ARRL presentation, conducted by Emergency Preparedness Manager Mike Corey, W5MPC -- along with President Kay Craigie, N3KN, and Chief Executive Officer David Sumner, K1ZZ -- focused on Amateur Radio’s current and evolving capabilities to provide Internet messaging connectivity.


Related:
http://kb9mwr.blogspot.com/2011/03/hsmm-420-430-mhz.html

http://qsl.net/kb9mwr/projects/wireless/70cm-ATV-HSMM.html

Sunday, September 4, 2011

New digital Yeasu Radio

During the last Tokyo Ham Fair, Yaesu presented a new line of digital ham radios.

The label placed on the glass case in front of the HT has "C4FM" and "FDMA" in English.

Vertex has been making and selling P25 commercial HTs for several years now. It's not such a stretch for them to come out with a dualband P25 radio under the Yaesu (amateur line) brand. Remember that they're now owned by Motorola.



There is also a new page on the Yeasu website titled "The Dawn of Digital Communications in the Amateur Radio World."


"2012 will be a historic year that sees Yaesu lead Amateur Radio into the modern era of Digital Communications."

Friday, September 2, 2011

DV Open Source Modem




Some German hams have developed a digital voice board capable of GMSK (DSTAR) and 4FSK (APCO25). It uses a DSP Encoder and Decoder.

The capabilities of their board are mostly defined from the firmware. It can handle baseband reception up to 8kHz (^=16kbaud, defined by the analog low pass filter).

Transmission is possible form DC up to 1/2 DAC update rate (a RC low-pass soften it). You can modulate on 2 DAC-channels simultaneously.

If someone want to write a firmware for an APCO, Analog, PacketRadio repeater - please let Jan, DO1FJN know.

For more info visit http://www.dvrptr.de/ And the corresponding yahoo group, DVRPTR.

>what type of programming adapter do you use?

http://www.atmel.no/beta_ware/

> Is the AVRISP-mkII useable ?

I'm not sure. If you mean the JTAGICE mkII: Yes.

You can use the (cheaper) AVR Dragon too. A complete list of hardware you will find on Atmels website (AVR 8/32 bit �C -> Tools).

> Is there a better one allowing debugging?

Yes and No (Jain). You can use a AVR ONE! This device supports more trace
capabilities.

> What version of AVR-Studio do you use?

AVR32 Studio 2.7beta but the last official 2.6 works too. We don't want use the
new 'AVR Studio 5' - it's a Windows only solution.