In 1998 TAPR designed a radio interface kit with enclosure for the EVM called the EVM-RI. It provides the necessary circuitry to interface the EVM to a transceiver and can be programmed as a KISS modem. The EVM-RI is based on Johan Forrer's, KC7WW, radio interface described in his QEX article, Using the Motorola DSP56002EVM for Amateur Radio DSP Projects.
A FULL KIT IS NO LONGER AVAILABLE
This partial kit provides:
- Bare front and rear panel PCB.
- Enclosure with drilled and labeled front and rear panels.
A Motorola DSP56002EVM (DSP) board IS NOT INCLUDED
The price for the DSP56002 EVMRI Partial Kit is:
$ 27 US for members of TAPR
$ 30 US for non-members+ shipping/handling if applicable.
Shipping and Handling
Shipping and Handling within the US will be by USPS Priority Mail.
International shipping costs are calculated as closely as possible. If the actual cost exceeds the estimate by more than $10.00, TAPR will contact you to get approval for the additional funds. TAPR uses insured Priority Mail International, unless the purchaser requires something else.
EVM Radio Interface Schematic Diagrams (Updated 2/21/98)
DSP56002EVM Schematic Diagrams
TAPR kits can be complex depending on the kitting experience of each builder. We don't think you will have trouble with the interface kit, but it does require some knowledge and experience to successfully go from a kit to a finished, usable unit, depending on the mode of operations. For data radio applications (i.e. 9600 baud FSK), special modifications must be made to your radio for proper operation of the EVM interface. In addition, the interface kit requires that you have a Motorola EVM56002 Interface unit. These can be purchased from several electronic distributors (see web page).
Pictures of the Kit
EVM Radio Interface Kit
Rear PanelThe image left shows the enclosure with the top off and the EVM mounted inside from the rear.
Front PanelLayout of indicators and silk screen for the front panel. Each of the LEDs (except Pwr) are programmable.
The design of the radio interface for the Motorola DSP56002EVM is based on Johan Forrer's, KC7WW, original design (see evmpcb.pdf last revised February 1996).
In February 1997, Douglas Braun, N1OWU, released his software suite for the EVM and revised his interface to be more flexible than Johan's. The TAPR interface is a happy medium between Johan's and Doug's design. The goal is to make the interface flexible for past and present code developed for the EVM and to create a flexible programming interface for future programmers.
The following people made this kit successful:
Steve Bible, N7HPR
Project Manager, Prototype builder
Lyle Johnson WA7GXD PCB design and Prototype builder
Johan Forrer KC7WW Prototype builder
Tim Baggett, AA5DF Prototype builder
Douglas Braun, N1OWU Prototype builder
Rich Mulvey, AA2YS Documentation
Greg Jones, WD5IVD Assistant Project Manager
Joe Borovetz, WA5VMS Part Procurement
Mark Hammond, KC4EBR Beta Tester
Bdale Garbee, N3EUA Beta Tester
John Koster, W9DDD PCB Liaison, Beta Tester
Keith Justice, KF7TP Beta Tester
John Ackerman, N8UR Beta Tester
Frank Perkins, WB5IPM Beta Tester
Steven Taft, KA1WX Beta Tester
David Borden, K8MMO Beta Tester
Louis Cobet, K6MDH Beta Tester
Jim Lynch, K4GVO Beta Tester
L.J. Shepherd, K6OYY Beta Tester