WPC, 2BW#|xxxx U^x  @Courier 10 Pitch2V2 WzNxxx U^x  @Courier 10 Pitch2"NJ*#|x  Subject: FT727 CAT programming question Near as I can tell the CAT interface on the Yaesu FT-727 handheld duplicates keypushes. I can't find any way to push the keys to get it to go to a particular band. The u/d key toggles between bands, but that isn't much help when you're using it remotely and can't see the display. Any ideas? ================================================================= Yes I have the official 200,000th generation photocopy faxed from Yaesu support and this is what it reports: 1 - Wiring: The tip of the phone jack is the serial output from 0x0 to 0x0f to represent signal strenth. All data to and from this little beast is TTL levels 4800 baud two inverted stop bits and one inverted data bit. My, I would like to meet the engineer that came up with that one :-)    The ring of the phone jack is the serial data input. The body of the phone jack is +12 volts. You are supposed to X get a ground from the body of the earphone jack. DO NOT SHORT X the BODY of the CAT port to the EAR or MIC jacks. If you X accidentally do this you let the smoke out of the IC's and X everyone knows that IC's stop working if you let the smoke out! X 2 - Software:    Control consists of duplicating the keystrokes that can me made on the xceiver keypad by sending the corresponding key codes to the CAT jack. The MSD (Most Significant four bits) select the key column and the LSD (not to be confused with C14H15N2CON(C2H5)2 lysergic acid diethelamide) forms the key row. The function key is simulated by setting bit 7. Serial output from the "S" meter is sent about every 100 ms    FUNCTION KEY 0x0fh#0x0e'(0x0d,-0x0c1p20x0b ---------------------------------------------------- 0x0e | +RPT SIMP -RPT PMS PSET 0x0d | SAVT TDEC TSET TXM S/CH 0x0b | SAVE TENC SCAN MC SHIFT 0x07 | LOCK BATT BEEP DUP STEP ---------------------------------------------------- NORMAL 0x07 0x06 0x05 0x04 0x03 ---------------------------------------------------- 0x0e | 1 2 3 v ^ 0x0d | 4 5 6 M MR 0x0b | 7 8 9 C = 0x07 | * 0 # VU D -----------------------------------------------------  h)Ԍ So to press in a direct frequency you would first press "D" then enter the frequency.  D = 0x037  1 = 0x07e  4 = 0x07d  6 = 0x05d  5 = 0x06d  2 = 0x06e  D = 0x037  SIMP = 0x0ee I do admit it seems a little awkward at first but it does work. To start always go to a known spot. If you are unsure of the current setting of the V/U status set it to a programmed frequency and then start. If you lose sync of the V/U switch I guess your beat!