Kenwood Computer Interface Instructions _______________________________________ These Instructions are TS-440 specific, but the basics also apply to the TS-940, TS-811 and TS-711. It is possible to save yourself a few dollars and lose nothing in quality by buying the parts to upgrade your Kenwood radio for computer control. Just purchase the parts were you find them and install them using the instructions in the Radio's Manual. IC 54 is a uPD-8251-AC Serial Communications Interface. Commonly called an 8251A ($1.89 Mail Order) IC 55 is a TC-4040-BP 12 Stage CMOS Divider. Commonly called a 4040 ($0.69 Mail Order) The IC-10 Interface Kit from Kenwood Contains ONLY these two parts and less instructions than are in this file. The only thing you are going to miss, is the $22+ price tag on the IC-10 Kit. Signals are TTL levels (NOT RS-232) Baud rate is 4800 (1200 Opt.) Format is ASCII Serial; 1 Start, 8 Data, 2 Stops The Baud rate may be changed to 1200 Baud by removing jumper W50 and installing a jumper from the left pad to the center pad as viewed from the front of the radio. This will become obvious once you have the radio opened up. Many other Baud rates are possible, just look at the schematic. As long as you are in the radio, lift D-60 to enable the 10 Hz. display. The main tuning knob is varing this digit, so you might as well see it. It also helps when using RIT/XIT as the RIT/XIT display does not resolve the 0.01 KHz. digit. This Modification is in the Radio's Book. Not in the book is the fact that if you lift D-80 and do an MPU reset, you will be able to transmit on any frequency between 1.5 and 30.0 MHz. This means you will be able to work the Mars nets, Etc. Do not transmit out of band. It is illegal even if it is accidental. Some computers use TTL levels on their serial ports. If so, here is a time when you will not have to convert it to RS-232. The IF-232 Interface from Kenwood is a 1488 and a 1489 chip in a box. These are an RS-232 Quad Line Driver and Receiver and are available at Radio Shack for $1.29 Each. Here is an easy project that will save you a lot over the $69+ Kenwood price of the IF-232 Interface. The 1488 needs a + and - supply. Unregulated + and - 12vdc is just fine. Get the +5 vdc for the 1489 by putting a 7805 regulator on the +12 vdc supply. 100 ma. is about the max you'll draw, so the smallest transformer you can find will still be plenty large. Don't forget to series up two of each gate to cancel the inversion that the 1480's produce. ACC-1 Connector Use a 6 Pin DIN Connector. (Radio Shack $1.29) Pin Signal Comments ________________________ 1 Gnd Signal Ground 2 TXD Serial Data from Radio to Computer 3 RXD Serial Data from Computer to Radio 4 CTS Computer Ready; (Radio Input) 5 RTS Radio Ready; (Radio Output) 6 No Connection Pins 4 and 5 may be left Unconnected. ***** Command Description for Kenwood Computer Interface ***** ______________________________________________________________ Auto Information ________________ AIn; The Radio Will Send the Status Info Automatically Whenever the Operator Manually Varies any Function on the Radio which is Covered in the IF; Command Where n = 0 for Auto Info OFF 1 for Auto Info On The Status Information Will be Sent in the Form : As defined in the IF; Command Display Memory ______________ DMnnnn; This is a Factory Diagnostic Function and is of no practical use to the operator The Contents of the MPU Memory will be Read Where nnnn = MPU Address (0000 Thru FFFF (HEX)) The Contents of the MPU Memory Will be Sent in the Form : DMnnnn-aabbccddeeffgghhiijjkk; Where nnnn = MPU Address (0000 Thru FFFF (HEX)) aa~~kk = Hex Number Pairs Of Next 16 Locations Down ____ DN; The Frequency or Memory Channel Will Decrement One Step Frequency VFO A / VFO B Request _______________________________ FA; FB; The Frequency in the Selected VFO Will be Read The Frequency Will be Sent in the Form: FAggmmmkkkhhh; or FBggmmmkkkhhh; Where gg = GHz. Value mmm = MHz. Value kkk = kHz. Value hhh = Hz. Value Frequency VFO A / VFO B Select ______________________________ FAggmmmkkkhhh; FBggmmmkkkhhh; The VFO Selected Will be Set to the Frequency Defined Where gg = GHz. Value (May be sent As 00 or Spaces) mmm = MHz. Value kkk = kHz. Value hhh = Hz. Value Function Select _______________ FNn; The Function Defined Will be Selected Where n = 0 for VFO A 1 for VFO B 2 for MEMORY Identify Model Request ______________________ ID; The Model of the Radio Will be sent in the Form : ID00n; Where : n = 1 for a TS-940 (*) n = 2 for a TS-811 (*) n = 3 for a TS-711 (*) n = 4 for a TS-440 Read Information Request ________________________ IF; The Status Information Will be Sent in the Form : IFggmmmkkkhhh snnnzrx yytdfcp Where gg~~hhh = Value as defined in FA Command s = "+" or "-" Value of RIT/XIT nnn = Value of RIT/XIT (n.nn kHz.) z = "0" (Not Used in TS-440) r = Value as defined in RT Command x = Value as defined in XT Command yy = Memory Channel No. t = 0 for Receive 1 for Transmit d = Value as defined in MD Command f = Value as defined in FN Command c = Value as defined in SC Command p = Value as defined in SP Command Lock Knob _________ LKn; The Manual Frequency Control Functions Will be Disabled Where n = 0 for Lock OFF 1 for Lock ON Memory Channel Select _____________________ MCxmm; The Memory Channel Defined Will be Selected Where: x = Don't Care (Use "0" or Space) mm = Memory Channel No. (00 thru 99) Mode Select ___________ MDn; The Mode Defined Will Be Selected Where: n = 1 for LSB 2 for USB 3 for CW 4 for FM 5 for AM 6 for FSK Memory Read ____________ MRnxrr; The Memory Channel Defined Will be Read Where: n = 0 for RX VFO 1 FOR TX VFO (Split Channels Only) x = Don't Care (Use "0" or Space) rr = Memory Channel No. (00 thru 99) The Memory Information will be sent in the Form : MRn rrggmmmkkkhhhdz ; Where: n = 0 for RX VFO 1 FOR TX VFO (Split Channels Only) rr = Memory Channel No. (00 thru 99) gg~~hhh = Value as defined in FA Command d = Value as defined in MD Command z = "0" (Not Used in TS-440) (Note: Four trailing Spaces) Memory Write ____________ MWnxrrggmmmkkkhhhdzxxxx; The Memory Selected Will be Set to the Frequency Defined Where: n = 0 for RX VFO 1 for TX VFO (Split Channels Only) x = Don't Care (Use "0" or Space) rr = Memory Channel No. (00 thru 99) gg~~hhh = Value as defined in FA Command d = Value as defined in MD Command z = "0" (Not Used in TS-440) RIT/XIT Clear _____________ RC; The RIT/XIT will be set to 0.00 kHz. RIT/XIT Down ____________ RD; The RIT/XIT will Decrement by 0.01 KHz. (10 Hz.) RIT/XIT UP __________ RU; The RIT/XIT will Increment by 0.01 KHz. (10 Hz.) RIT (ON/OFF) ____________ RTn; The RIT Status Will be Selected Where n = 0 for RIT OFF 1 for RIT ON Receive _______ RX; Radio Will Enter Receive Mode (PTT Released) Scan (ON/OFF) _____________ SCn; The Scan Status Will be Selected Where n = 0 for Scan OFF 1 for Scan ON Split (ON/OFF) ______________ SPn; The Split Status Will be Selected Where n = 0 for Split OFF 1 for Split ON Transmit ________ TX; Radio Will Enter Transmit Mode (PTT Depressed) Up __ UP; The Frequency or Memory Channel Will Increment One Step Voice Recall ____________ VR; The Frequency Will Be Spoken (*) XIT (ON/OFF) ____________ XTn; The XIT Function Will be Selected Where n = 0 for XIT OFF 1 for XIT ON (Note: XIT is Co-Affected by the RC, RD and RU Commands) (*) Denotes this Command or Function has not been Tested. _______________________________________________________________ These additional Kenwood Commands do not apply to the TS-440 and as such were not defined; but are used in one or more of the other models and are presented here for your experimentation. AT Antenna Tuner (Standby) DI DCL ID (Readout of Callsign) DS DCL System (On/Off) HD Scan Hold LO Local (TS-940 : Remote control of SLOPE, TUNE, VBT) MS Memory Scan OS Offset SH Slope Tune High SL Slope Tune Low ST Step TN Tone Number (SubTone) TO Tone (SubTone On/Off) VB VBT