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| THE NL3ASD MODIFICATION FILES - THE HAM RADIO MODIFICATION - PAGES PAGES E TO H | HOMEPAGE |
Date: 5 May 89 16:48 PST From: ALLYN To: MBRAMWEL Subject: ft727r CAT interface FT-727R CAT System Interfacing and Control This information describes the hardware and software requirements of the CAT (Computer Aided Tranceiver) System in the FT-727R. Connections Four connections are used by the CAT SystemL three at the CAT jack, illustrated below, and one (Signal Ground) ar the outer contact of the MIC or EAR jack. DO NOT SHORT THE OUTER CONTACT OF THE CAT JACK TO GROUND!!! [Diagram of the CAT plug: Looks like a stereo audio jack of the appropriate size. The outer sleeve is +6 to +12 V DC (Battery Voltage) I do not think this line needs to be connected. The middle contact is the Serial KeyCode Input. The center contact is the Serial Meter Output (00h to 0Fh). See the manual for further description.] Data Format: All serial data consists of single byte binary codes sent at 4800 baud, TTL levels, with two INVERTED stop bits and one INVERTED start bit. Key Codes: CAT Control consists of duplication the keystrokes that can be made on the tranceiver keypad by sending the corresponding keycodes to the Serial Keycode Input contact of the CAT jack. The most significant four bits (MSD) correspond with the key column and the least significant four bits (LSD) correspond with the key row. The Function key (on the side of the tranceiver) is simulated by setting bit 7. Results are identical to those described for manual operation in the FT-727R Operating Manual. Serial Meter Output is sent approximately every 100 ms while receiving. [Table for the codes. The lines in [] are the original values in the Yaesu handout, and are followed by the corrected lines as determined by KB7ABA. Remove the lines in [] to see what sould be the right table.] [ [ FUNC F E D C B ] [ FUNC 8 9 A B C MSD [ [ [ NORM 7 6 5 4 3 ] [ NORM 0 1 2 3 4 LSD V E +RPT SIMP -RPT PMS P SET 1 2 3 V c D SAV T T DEC T SET TX M S/CH 4 5 6 M MR B SAVE T ENC SCAN MC Shift 7 8 9 C <=> 7 LOCK BATT BEEP DUP Step * 0 # V/U D SOURCE: The QRZ Windows Ham Radio CDROM
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