Elecraft KRC2ACC - Manual

E
LE CRAF T KR C2
BA ND D ECOD ER a nd C ONTR OLLE R
Accessibility Upgrade and Operating Instructions
Revision A, March 4, 2004. Copyright © 2004, Elecraft; All Rights Reserved
Introduction
The KRC2 Accessibility Upgrade adds the capability of Morse code announcement of K2
functions. Along with this function, the KRC2 is configured to control K2 functions using KRC2
button combinations.
The upgrade kit adds two parts to the KRC2 circuit board, and replaces the KRC2’s
microcontroller.
If your KRC2 is not yet assembled, make the following changes to the Owner’s manual:
On page 13 of the KRC2 Assembly and operations Manual, between the first and second steps,
insert the two instructions from page 2 of these instructions for installing R5 and SP1. Use the test
procedures from these instructions for testing and initial power-up of the KRC2.
Firmware Requirements
The KRC2 Accessibility Configuration will work with any K2 or K2/100 transceiver with K2
main microcontroller firmware revision 2.01 or later and either the KIO2 or KPA100 options. In
order to use the KDSP2 support functions, the K2 is required to use firmware revision 2.04 or
later.
Upgrade Kit Parts List
The table below lists all parts in the kit. Typical markings on capacitors, as well as resistor
and RF choke color codes, are shown in parentheses.
Ref. Description Part No. Qty
R5 Trimmer Potentiometer, 5K (“502”) E520009 1
SP1 Miniature Piezo Speaker E980064 1
U1 IC, programmed microcontroller, PIC16F877A-I/P E610019 1
MISC KRC2 Accessibility Upgrade Instructions E740071 1