Subject: TS-440s (the whole scoop) ed: 26 May 86 17:45:45 GMT Organization: UCSD wombat breeding society The TS440 is nice. Here's what I've found out about it that isn't in the operation manual (in some random order): Diode options: There are a bunch of configuration options controlled by clipping or inserting diodes on the back of the control board. You get to it by taking the top and bottom covers off (a bunch of silver screws), loosening the front panel (4 flat-head silver screws, NOT the black ones). Then you have: diode controls in out (cut) ----- -------- ---------- ---------- D65 mode confirmation Morse single beep D66 display resolution 100 Hz 10 Hz D67 memory protect none on D73 CW shift 800 Hz 400 Hz D78 WARC 24MHx band tx disabled enabled D79 WARC 18MHz band tx disabled enabled D80 General Coverage tx disabled enabled Self-Test: You can run a rather complete test of the control logic by the built-in "semi-self-test", a series of 56 routines. To run this, turn the unit on whilst holding the AM and T-F SET switches pushed in. It changes to the next test when you turn the VFO knob clockwise. Turn the power OFF to reset the unit. Test What it does ---- --------------------------------------------------- 0 all positions in display light 1 all segments in display dark 2 all positions in display light 3 all segments in display dark 4 one digit lighted (rightmost) 5 next digit lighted 6 next digit lighted 7 next digit lighted 8 next digit lighted 9 next digit lighted 10 next digit lighted 11 next digit lighted 12 next digit lighted 13 next digit lighted 14 next digit lighted 15 next digit lighted 16 next digit lighted (leftmost) 17 feeper sounds 18 feeper silent 19 all mode LEDs ON 20 all mode LEDs OFF 21 receive 22 transmit The following tests change internal signals. They are most useful if you are trying to trace the circuits controlled by these signals. You'll need a s service manual (or at least a schematic) to made reals sense of these. 23 Band select - all lines high 24 BAND select - all lines low 25 PD select - all lines high 26 PD select - all lines low 27 ENF select - all lines high 28 ENF select - all lines low 29 ENP select - a:ll lines high 30 ENP select - all lines low 31 RES select - all lines high 32 RES select - all lines low 33 CO select - all lines high 34 CO select - all lines low 35 AX select - all lines high 36 AX select - all lines low these next tests check the outputs of the 8255 parallel port interfaces, which select several internal functions. 37 (IC2) port A all lines high 38 (IC2) port A all lines low 39 (IC2) port B all lines high 40 (IC2) port B all lines low 41 (IC2) port C0-C3 high, C4-C7 low 42 (IC2) port C0-C3 low, C4-C7 high 43 (IC53) port C all lines high 44 (IC53) port C all lines low Following display busy lines and scan lines in the rightmost 9 digits of the display. You will push buttons to cause the digit to change from a 1 to a 0 indicating that the associated button has been pushed. test bit8 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 45 LOCK AT Mic UP Mic DN PTT/AT VS1 46 (none) 47 (key scanner) 48 1 6 V/M VOICE 49 2 7 M>V RIT A/B 50 3 8 SCAN XIT SPLIT 51 4 9 M.IN T-Fset A=B dip3 dip4 dip5 52 5 0 CLEAR 1Mhz dip1 dip2 dip6 dip7 53 ENT DOWN UP dip8 dip9 dip10 (the digits 0-9 are on the front panel keyboard; dip2-dip10 are the segments of S50, the SSB frequency response dipswitch on the rear of the control unit printed circuit board.) 54 not used 55 not used 56 END Serial interface: The TS440 has a serial ASCII interface option. You have to insert two chips into sockets on the back of the control unit circuit board to take advantage of this. IC54 is an 8251A Uart, and IC55 is a CD4040 divider. These chips are available from Kenwood together with a interface manual, or you can buy them at your local chip shop for about $6.00 or so. When inserted, the transceiver speaks 4800 baud ascii in/out the 6-pin DIN connector ACC-1 on the rear. The signals are from the 8251, but are inverted in a 74LS04 and RFI filtered before being brought out to the world. An interface box with inverter, RFI filter, power supply, opto-isolator, RS232 level shifters, and power supply is available from Kenwood for about $49.00, or you can build your own. (Depending on how much your computer radiates and how sensitive to RF it is, you may only need 5v, +/-12v, a 74LS14, MC1488, and MC1489. If your computer has a TTL level serial port, perhaps all you'll need is the 74LS14. If you're not confident of being able to solve the possible digital/RF interface problems yourself, the $49 interface is probably a good buy.) ACC-1 Serial Interface pin signal --- ---------------------------------------------------- 1 signal ground 2 data from transceiver 3 data to tranceiver 4 cts to transceiver - computer can throttle output 5 cts to computer - transceiver can throttle input 6 no connection (I'm working on a program to control and monitor the transceiver over this port. I'll post it and a list of commands separately when I've got them all working.) SSB frequency response dipswitch: located on the back of the control unit, this adjusts the frequency response of the upper and lower sideband modulators to compensate for component variations. Changing it isn't a good idea, since you have tpo have a two-tone oscillator and have to reset the carrier suppression adjustment if you do. The service manual explains this process; I'm including this here so that people who have been wondering what the dipswitch does won't screw themselves by flipping switches to see what happens. A few adjustments you should know about (read the service manual before you tweak wildly on these!): tweaker what it does ------- ----------------------------------------------- RF-VR3 FM Microphone Gain RF-VR6 FM Deviation - set to 4.6KHz on dev meter IF-VR2 S-meter zero - set to zero with 50 ohm dummy load IF-VR3 S-meter S9 - set to S9 with 40dbu input 14.175MHz USB IF-VR4 Squelch threshold - close at 12 o'clock with mode = CW and filter WIDE IF-VR9 CW side tone level - as you like it IF-VR10 Beep tone level - as you like it Someone wanted to know what the difference between the DATA connections on ACC-2 and the AFSK connectors was. On output, none; the AFSK and the DATA out pin on ACC-2 are connected together, and are fed from the high side of the volume control - they are receiver audio BEFORE the cw sidetone, feeper, and voice response unit are mixed in, and should be a constant level independent of the AF gain setting. The AFSK input is different from the DATA IN connection; AFSK and microphone signals both go through the mike preamp and speech processor; the DATA input bypasses both. The MIC GAIN pot does control all three input levels. (as a note, you can tap preamped/processed audio OUT of the DATA IN connection, since it is just a tap on the output of the preamp/processor. This is also the feed into the FM modulator. But NOTE that the MIC GAIN pot doesn't adjust the mic gain on FM - there is a separate tweaker for that.) ------------------------------------------------------------------------ I'm happy with my TS440. Now all I have to is get my code speed up.... Brian Kantor, WB6CYT UCSD Office of Academic Computing Academic Network Operations Group UCSD B-028, La Jolla, CA 92093 (619) 452-6865