One of the downsides of doing portable Digital Modes is dragging the computer with you. Personally I have had poor luck with bringing laptops to the field for digital work – a Dell Laptop on one occasion decided the outside cold would finish off its battery and didn’t work, the Macbook had a physically self-destructed hard drive within hours of arriving on an Island and an older Windows machine decided that its USB ports which worked wonderfully at home were not recognized once in the field.
click on picture for larger version
From their website:
NUE-PSK Digital Modem
Improved since the design prototypes …
single graphic display
The NUE-PSK Digital Modem comes fully assembled and tested
… just plug in your keyboard and SSB transceiver, and start operating!
(Kits and partial kits will be avalable for sale later in 2008.)
Place an “Early Bird” Order
Limited-time, special pricing provided for pre-availability orders.
PSK31 is one of the latest communications modes to capture the interest of hams worldwide. Its inherent ability to dig out low, near-inaudible signals is ideally suited for low power QRP enthusiasts. The PSK31 digital modem engine, however, requires intense DSP processing that is only commonly available in PC sound card. Thus the PSK operator desiring portability for field operation is locked into using a laptop computer as a controller, which results in a cumbersome station. But there’s hope!
The NUE-PSK is a standalone, battery-operated digital modem using a Microchip dsPIC33F microcontroller. The project uses a single graphic display for: transmit and receive text data, band spectrum, and tuning indication. When coupled with an SSB-capable transceiver and a standard PS2 keyboard, the NUE-PSK Digital Modem forms an effective, compact, and portable station for working the digial modes on the amatuer bands.
> Standalone, half-duplex modulator/demodulator for amateur radio digital mode communications
> Handheld unit … no PC required
> Menus select operating modes, Squelch Thresh, PGA Gain, CW ID
> 128 x 64 pixel graphic LCD shows audio signal spectrum 500 Hz-to-2 kHz (with backlight)
> Tx and and Rx buffers and menuing system shown in lower half of LCD using four 20-character lines of text
> Rotary encoder adjustment of modem position along audio spectrum
> Modes currently supported: BPSK31, QPSK (RTTY and MFSK coming next)
> External keyboard jack: 6-pin mini-DIN, PS2-compatible
> Keyboard provides text input for Tx entry, command/mode selection and modem frequency adjustment
> Connection to SSB transceiver: 8-pin mini-DIN (audio in, audio out, PTT, power)
> Powered by internal battery (9V) or externally applied via 2.1mm coaxial jack
> Power requirements: 8-13.5V DC at 80 ma (typical)
> On board trickle charge circuitry provided for internal NiMH battery (only)
> Field reprogrammability of internal microcontroller (dsPIC33F) to allow software updating in the field by the owner
> Aluminum enclosure provides for rugged portable use while shielding transceiver from digital EMI
> GPL open source – software freely available
> Simple/inexpensive development platform (Microchip ICD2 or PICKit2) for experimenters
> Programmed in C
> Enclosure dimensions: 7″ x 4″ x 1″
> Single 3.75″ x 5.25” pc board contains all components and connectors
> Lightweight: Control for precise audio level control to transceiver
> Cable assembly provided (plug and shielded cable) for connection to the SSB transceiver
The AmQRP group is running a special until December 31st which will save a person some money while giving the group the funds to cash flow the project. I’ve just put my order in, paying by Paypal to make sure I made the deadline.