Make your own free website on Tripod.com
www.packetradio.tk - The PacComm WA4DSY 56KB MSK RF High Speed, The Grapes Modem - PacComm WA4DSY 56KB
Free Website Contents The Free World of Packet Radio Software in Amsterdam The Netherlands
 
Arrow HOMEPAGE
 
Arrow DSP 4100
Arrow DXP 38
Arrow FAX 4100
Arrow PK 96
Arrow MFJ 1278
Arrow PC 320
Arrow TINY 2 MKII
Arrow TNC 21S
Arrow TNC 2H
Arrow TNC 31S
Arrow TNC 3S
Arrows THE PACCOMM WA4DSY
Arrow Webmasters

http://www.webceo.com
WWW.WEBCEO.COM



Active Search Results
ACTIVE SEARCH RESULTS



Click Here And Vote Also For Our Free Website
CLICK HERE AND VOTE FOR
OUR FREE WEBSITE



UPC High Speed Fiber Power - Downloads 200 MB And Uploads 10 MB
UPC HIGH SPEED FIBER POWER
DOWNLOADS 200 MB
UPLOADS 10 MB


For Hosting And Domain Names - http://www.domeinbalie.nl
Webhosting And Domainnames
http://www.domeinbalie.nl



VIEW BEAUTIFUL ARTWORKS


THE WORLD OF FREE PACKET RADIO SOFTWARE IN AMSTERDAM

THE PACCOMM WA4DSY 56 KB THE GRAPES PACKET MODEM



Paccomm Packet Radio Modem
PACCOMM PACKET RADIO MODEM



The PacComm WA4DSY Front View

THE PACCOM WA4DSY FRONT VIEW


WA4DSY 56KB RF HIGH SPEED GRAPES MODEM

A modernized version of the famous 56 kb msk modem designed by Dale Heatherington, The WA4DSY. Licensed by PacComm. WA4DSY designed a 56 kb MSK RF Modem in the late 80's which has been used successfully in the Atlanta and Ottawa areas. The modem was sold as a kit by the GRAPES club in Atlanta, and is often called the GRAPES modem. The new design is a single pc board. Parts count is greatly reduced. Many tune up and operational conveniences have been added.


MUST BE USED WITH A TRANSVERTER FOR THE DESIRED FREQUENCY

Power Requirements: 12 volt at 300 ma.
Packaged in a Paccomm extruded case 7.25 wide x 7.25 deep x 1.5 high.
Optional 12 volt, 30 watt switching supply powers both modem and transverter.


THE INTERFACE CONNECTIONS

Power: 2.1 mm Round Connector.
Electrical: Balanced RS-422 or CMOS.
Physical: DA15 Female.
IF in/out: BNC.
Transverter: 5 pin DIN, Female.


THE PERFORMANCE

IF Frequency: 29-30 MHz Output.
Power: Adjustable from 0.1 mw to 2 mw.
Frequency Control: Synthesizer 1 kHz steps.
Key-up Delay: 0 ms.
RX DCD Time: 3 ms.
Total Delay: 3 ms.


THE FEATURES

Remote reset system.
Allows a remote site computer to be reset by remote control.
Built in fifo bit regenerator.
Allows the modem to become a full duplex bit repeater with no additional hardware.
The RS422 interface remains fully functional when the bit repeater is enabled.


THE WATCHDOG TIMER

A 2 second watchdog timer turns off PTT after 2 seconds.
Resets when rts goes false.
Can be disabled.


THE BUILT-IN TUNING AIDS

In tune up mode the transmitter becomes a sweep generator to allow tuning the RF coils properly using only a dual trace 30 MHz scope.


THE LED'S

Led's: Signal strength display.
Led's: Ready, PTT, and DCD.
Led: One internal led which indicates when the remote reset relay is closed.


THE SWITCHES

Front panel: power switch push on push off, rotary hex frequency selector.
Rear Panel: key tx activates transmitter and sends scrambled ones.
Remote Reset: Sends remote reset code.


The PacComm WA4DSY Back View

THE PACCOMM WA4DSY BACK VIEW


THE TECHNOLOGY

All the digital logic is implemented in a single Xilinx XC3042A-7 chip packaged in an 84 pin PLCC.
Data carrier detection is done digitally in the Xilinx chip.
User transmit data is scrambled x17 + x5 +1 and converted to NRZ.
A 27C256 EPROM holds both the Xilinx chip programming data and all the state machine and waveform tables for the modem transmitter.
It also holds the data which is loaded into the frequency synthesizer at power up.
Transmit and receive frequencies are programmed independently.
The only adjustments involve tuning the filters.
The special tuning mode should make that task simple.
The transmitter signal is compatible with existing 56KB WA4DSY Modems.
Drive the 56kb modem with a gracilis packet win hdlc card or, for stand alone operation, a PacComm SPIRIT-2 PAD or a Gracilis PackeTen.
Gracilis Packet Win WA4DSY 56KB Modem Interfacing Instructions





THIS IS A WARNING FOR COPYRIGHT PROTECTED MATERIAL

All Rights Reserved. No part of this website or any of its contents may be reproduced, copied, modified or adapted, without the prior written consent of the author, unless otherwise indicated for stand-alone materials. You may share this website by any of the following means: Using any of the share icons at the bottom of each page Google Mail, Blogger, Twitter, Facebook, GoogleBuzz. Providing a back-link or the URL of the content you wish to disseminate; and you may quote extracts from the website with attribution to www.packetradio.tk. For any other mode of sharing, please contact the author at the email. Commercial use and distribution of the contents of the website is not allowed without express and prior written consent of the author.

THE WORLD OF FREE PACKET RADIO SOFTWARE IN AMSTERDAM




The Weather in Amsterdam The Nederland
Amsterdam








View Our Stats


Google PageRank


http://www.intelseek.com



Offers You Free Domain Names in The Form Of http://www.yourname.tk - Includes Free URL Redirection And Free Forwarding Service
CLICK HERE FOR FREE DOMAIN NAMES LIKE HTTP://WWW.YOURNAME.TK




If You Click Here You Can Vote For Oure Free Websites in The Top 100 List
CLICK HERE AND YOU CAN VOTE FOR OUR FREE WEBSITES IN THE TOP 100 LIST




Web CEO - The Ultimate Software Suite For Web Site Promotion
A TOP RANKING? USE THE ULTIMATE SOFTWARE SUITE FOR WEB SITE PROMOTION




Submit Your Site To The Web's Top 50 Search Engines for Free!
SUBMIT YOUR SITE NOW TO THE INTERNET TOP 50 OF SEARCH ENGINES FOR FREE




My Mail Form Easy Form - Simple Web forms without knowledge of HTML
MY MAILFORM EASY FORM - SIMPLE WEB FORMS WITHOUT KNOWLEDGE OF HTML





THE ALEXA BANNER GIVES THE DALLY STATISTICS OF THIS FREE WEBSITE




the free world of packet radio software in amsterdam
The World of Free Packet Radio Software in Amsterdam

The Free World of Packet Radio Software in Amsterdam The Netherlands - All Rights Reserved