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--- radios:tk-90 [2024/05/04 17:54] – m0lte
+++ radios:tk-90 [2024/05/15 21:58] (current) – g6fji
@@ Line 16: / Line 16: @@
 {{ :radios:kenwood_tk-90_service.pdf | Kenwood TK-90 service manual }}
+{{ :radios:kenwood-tk-90-pc-commands.pdf | PC Commands }}
+{{ :radios:tk-90_function_reference.pdf | Function Reference}}
+{{ :radios:tk-90_navigator_ttl_cable.pdf | Navigator TTL Cable}}
+{{ :radios:tk-90_navigator_rs232_cable.pdf | Navigator RS232 Cable}}
+{{ :radios:tk-90_modification_reference.pdf | Modifications Reference}}
 Requires programming. Both serial and USB-serial mic jack programming cable is available as a Kenwood part (see below) or off brand USB versions are also available. This implies it is just straight serial so a generic USB serial cable with an RJ45 plug crimped on the end may be suitable.
@@ Line 54: / Line 64: @@
 ===== Data modes / modem use =====
-Remove the top lid of the radio- 8 screws.
-Turn trimmer VR852 fully clockwise, for max sensitivity to TX audio input.
 Install KCT-39 - accessory breakout cable.
-Boot radio into dealer mode by holding down B while powering up. Scroll down to FUNCTION, and press D. Scroll to menu item 19: DI LEVEL and press D. Turn up to 9, maximum. Press the square button. Press the red button twice to exit and reboot.
 Build a cable (the plug parts come with KCT-39):
-  * RX Audio -> pin 14 (sky blue)
+  * RX Audio -> pin 4 - DEO - brown
-  * TX Audio -> pin 15 (turquoise)
+  * TX Audio -> pin 5 - DI - orange
-  * PTT -> pin 6 (yellow)
+  * PTT -> pin 6 - DPTT - yellow
-  * Ground -> pin 8 (blue)
+  * Ground -> pin 8 - GND - blue
+NB - DI is "data input audio", DEO is "data output audio".
 {{:radios:tk-90_accessory_port_pins.png|}}
-NB - currently feeding 2.2V P-P is resulting in rather low RF output. Providing more audio than that does result in more RF output, but the levels required seem excessive and I chickened out at about 4V. Cause as yet unknown.
+====== Dealer mode ======
-NB - DI LEVEL is "data input audio level", DEO LEVEL is "data output audio level"
+Boot radio into dealer mode by holding down B while powering up. Scroll down to FUNCTION, and press D. Adjust settings as desired. Press the red button twice to exit and reboot.
+Some recommended settings in DEALER mode:
+  * M2 MIN VOLUME: 0 - means the radio can boot with the volume turned to zero
+  * M12 TOT: TX time out timer. Set to, say, 3 minutes
+  * M13 VFO TX PWR: self explanatory
+  * M19 DI LEVEL: data input audio level, set as required
+  * M20 DEO LEVEL: data output audio level, set as required
+  * M22 DATA S-BAND: which sideband will data be transmitted on - generally set to USB
+====== Adjusting TX audio response ======
+Remove the top lid of the radio- 8 screws.
+Trimmer VR852 is TX sensitivity - max sensitivity to TX audio input is fully clockwise.
+To set up TX audio, I recommend the following procedure:
+  * in the dealer menu, set DI to 4, the default
+  * set the radio to 100W
+  * set your modem to its maximum volume level (on NinoTNC I recommend DIP switch 1 is down/off (i.e. lower transmit audio range and with its DEV pot set to maximum)
+  * have the modem transmit repeated frames (on NinoTNC, hold test TX button for ~20 seconds and release)
+  * turn VR852 until a power meter connected to the radio reads say 50W
+  * adjust the modem output volume down until the power meter reads the desired output power, e.g. 25W
 ===== Navigating =====
+The A-D buttons are programmable, but the functions they have shipped to us with are as follows.
 Pressing A in VFO mode gets you a blinking cursor. Move the cursor left/right with <C and D> buttons. Change that digit with CH up and CH down. Exit with the red button.
+Pressing B cycles between preamp / attenuator settings.
+Pressing C gets you the clarifier settings.
+Pressing D cycles between modes (i.e. USB, LSB, DATA, CW, AM, FSK)
+Pressing square gets you a basic menu.
+Booting the radio with B held gets you a DEALER menu. This is pretty safe. More in here than the basic menu.
+Booting the radio with A held gets you an ADJUSTMENT menu. Warning: this is a service menu, for radio alignment, and you can break things very easily in here, requiring realignment which requires lab tools and knowledge.
+There is supposed to be a TEST mode when booting the radio with D held, but this does not appear to be enabled.
+All of the above is in the service manual.
+===== Mic pinout =====
+Pin 8 is towards the bottom of the radio.
+  - DM
+  - MIC
+  - PTT - common with a point labelled PTT/TXD
+  - SB
+  - HK - connected to a pin labelled RXD0 and to +5V via a 4.7k resistor
+  - ME
+  - GND
+  - BLC
+Abbreviations are from the schematics in the service manual, meanings as yet unknown.
+A known working cable has wiring:
+  * White - Pin 2 (MIC)
+  * Red - Pin 5 (SB)
+  * Black - Pin 6 (HK)
+The cable has a PL2303 USB serial chip.