Differences

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--- packet:ninotnc [2024/04/01 16:25] – [Signals settings] m0lte
+++ packet:ninotnc [2024/04/02 07:52] – [Cheat sheet] 2e0ijc
@@ Line 61: / Line 61: @@
 ==== Cheat sheet ====
-^ Radio              ^ Signals ^
+  * Switch 1 is TX audio range selection - on/up is high level for louder transmitted audio, off/down is for quieter transmitted audio
-| Yaesu FT-450D      | 0000    ^
+  * Switch 2 is RX audio sensitivity - on/up is low sensitivity for loud radios, off/down is high sensitivity for quiet radios
-| Tait TM8100 / 8200 | |
+  * Switch 3 is AC/DC coupling - normally should be off/down apart from specific radios
+  * Switch 4 is external carrier detect - normally should be off/down unless you need it for a specific purpose
+^ Radio              ^ Signals ^ Notes ^
+| Yaesu FT-450D      | 0000    | Requires low level TX audio - the FT-450D is very sensitive.\\  RX audio setting probably doesn't matter, control with appropriate RF gain / AGC, but off/down works. |
+| Tait TM8100 / 8200 | 1100    | Requires high level TX audio, else the transmitted audio is too quiet in the range of the pot.\\ Requires low level RX audio, else CRC is always lit. \\ Requires AC coupling to block the DC which is present on the TX audio pin. |
+| Tait T2010 | 1100    |  |
+| Yaesu FTM-300D | 1100    | Tested up to Modes 0100 4800 GFSK IL2P+CRC |
 ==== Switch 1 - Transmit audio range selection - DATA/MIC ====
@@ Line 324: / Line 331: @@
 {{:kantronicstncwiring.png|}}
+===== Firmware =====
+To upgrade the firmware, see https://github.com/ninocarrillo/flashtnc/blob/master/README.md.
+TL;DR:
+<code>
+# save a headache
+sudo systemctl disable linbpq
+sudo reboot
+# then...
+sudo apt install -y python3 python3-pip python3-serial git
+git clone https://github.com/ninocarrillo/flashtnc
+cd flashtnc
+python3 flashtnc.py N9600A-v3-35.hex /dev/ttyACM0
+# don't forget to...
+sudo systemctl enable linbpq
+sudo systemctl start linbpq
+</code>
+Use v3 firmware unless you know you have a 512kb chip, which is none of the OARC UK kits (i.e. ignore the v4 firmware - it's the same, but for the bigger chip).
+If you get dire warnings about bricked TNCs, know is this highly unlikely. Unplug TNC, reboot system, plug TNC, try again.