NUE-PSK Digital Modem

[VE2UGO Hugo]

NUE-PSK Digital Modem

http://www.nue-psk.com/





An easy and portable way to get on the air with PSK-31, RTTY and CW ... no computer required!

    The NUE-PSK is a small 7" x 4" x 1" standalone, battery-operated digital modem using a graphic display for transmit and receive text data, as well as for showing band spectrum and tuning. Just plug in a standard PS2 keyboard and connect to an SSB-capable transceiver like the FT-817 or the PSK-xx transceivers from Small Wonder Labs, and you'll have an effective digital mode station that goes absolutely anywhere.
    The NUE-PSK modem is an "open" design, with published hardware details and software source code.  What this means is that many others can contribute to the modem's capabilities and modes of operation.  Already we have a "USB add-on option" that maintains the current time and date, and lets you record the QSO (with a timestamp) to a USB stick for archival or EmComm use.
    Further, the modem has the ability to be "field upgraded" by using a serial port (or USB thumb drive) to load new versions of the modem software.  The NUE-PSK Modem supports BPSK (PSK-31), QPSK, RTTY and CW.  Just download the latest-and-greatest modem software from this website and send it to the modem over the serial port.  It's the modem that keeps on growing ... new modes, new features, new add-on accessories!

Overview
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 showing 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 amateur bands.

Specifications

>    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 displays audio signal spectrum 500 Hz to 2.5 kHz (with backlight)
>    Tx and Rx buffers and menu system displayed in lower half of LCD using four 20-character lines of text
>    Tune controls modem position along audio spectrum
>    Modes currently supported: BPSK31, QPSK, QPSK reversed
>    External keyboard jack: 6-pin mini-DIN, PS2-compatible
>    Standard PS2-style or dual-mode USB/PS2 keyboard (user-supplied) 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 two internal 9V batteries (not included) or an externally-applied supply via 2.1mm coaxial jack
>    Power requirements: 9-18V DC.  Current at 12V is 60 ma without backlight, 80mA with backlight.  The current decreases as input voltage is increased.
>    Field reprogrammable to allow software updating in the field by the owner
>    Aluminum enclosure provides for rugged portable use while shielding transceiver from digital EMI
>    Enclosure dimensions: 7" x 4" x 1"
>    Single 3.75" x 5.25” pc board contains all components and connectors
>    Lightweight: < 1 lb with batteries.
>    Control for precise audio level control to transceiver
>    Cable assembly provided (plug and shielded cable) for connection to the SSB transceiver
>    Optional USB Card provides ability to record transmit and receive text from QSOs for archival and printing.  Also serves as serial adapter port for connection to PC for upgrading modem software, and for uploading/editing/downloading file with modem settings and macro text strings.


Assembled & Tested Modem
Standalone, battery-operated digital modem allows transmit/receive using PSK31 on the Amateur Radio bands. PC not required! Just plug in standard PS2 keyboard and connect modem directly to SSB-capable transceiver. Supports BPSK (PSK-31), QPSK, RTTY, RTTY/R, CW and CW Direct (with CW-only rig).  Other digital modes coming. Field-upgradeable software. Graphic display shows Tx and Rx text data, band spectrum and tuning indication. Requiring only 60ma operating current (typ), the modem forms an effective, compact, and portable station for working the digital modes on the amateur bands. Comes with unterminated cable for connection to radio. (User must add connector for specific transceiver being used. See options for pre-made cables below.)   

$220 (Modem only)

$323 (Modem+USB+RTCC)


Updated:  December 31, 2013
Version 5.03d adds "External Monitor" capability

Version 5.03d Software Available ...  We added External Monitor (MON) feature to send the modem’s Tx and Rx data characters to the modem’s type ‘B’ USB serial port (square jack on the side of the modem case), in addition displaying them on the modem’s LCD.  This feature, toggled on/off by the ctrl-E keystroke, shows “MON” at the right side of the modem LCD when active, and allows modem data to be sent to a terminal emulator program running on a PC, and thus may allow the operator to more easily view  the incoming and outgoing modem data.  Notes:  (1) The PC’s serial port must be set to 115 Kbps N81, no flow control.  This may be set in the terminal emulator application running on the PC;  and (2) A USB flash drive containing a new “ftrfb.ftd" file must be inserted to the modem upon initial power-up in order that the modem’s USB controller chip is updated to the correct version. (See Latest Software files below for this ftrfb.ftd file.  Thanks to Milt W8NUE for this great feature!

[VE2PID Pierre]

Bonjour...

J'aurais deux suggestions à faire à nos contributeurs bien intentionnés.

1) S'assurer que les sujets proposés n'ont pas été traités antérieurement. Dans le cas du NUE-PSK, ce sujet a été abondamment couvert depuis 2008, notamment dans le fil PSK en portatif et sans PC... 4 pages de messages!
Voir PSK en portatif et sans PC.

2) Ne pas recopier tous les renseignements provenant d'un autre lien. Il suffirait simplement de donner l'adresse du lien.

Tous les grands forums qui se respectent mentionnent (et souvent exigent) ces règles de base ...

[VE2UGO Hugo]

Salut Pierre,

C'est simplement que cette section est la revue d'équipement et non la discussion sur le PSK et certains outils nous amenant à la pratique.

J'ai fait une recherche sur le forum avant avec "NUE-PSK" et rien n'est sortie pour l'évaluation de ce produit!

Ainsi, ceci permettra aux utilisateurs de commenter le sujet et de constater le dépôt de nouveau firmware ou amélioration s'il y a lieu.

Le premier "post" est l'introduction au produit! Désolé de déranger ta vision de la chose!

Ça permet aussi de centraliser l'information! De plus, quand les liens deviennent périmés, bien l'info reste présente sur le forum!

Merci par contre d'ajouter le lien complémentaire à ce sujet!

73!

[VE2PID Pierre]

... au sujet du NUE-PSK, le mien est au repos depuis plusieurs mois.
Le KX3 décode le PSK31 (et le RTTY) et permet même l'envoi en PSK avec la clé Morse.
J'ignore si le volume de vente du modem s'est maintenu, mais j'en doute.