[TG] [TG11] Multiple issues with new instrument package

[Tom - Raymarine - Moderator]

If your speed reading is always zero, the next step would be to measure signal voltage between green and bare on the speed transducer cable, at the rear of the display and with everything connected and powered and with someone slowly turning the paddlewheel by hand (blanking plug inserted into the through-hull fitting.) You should see 2 pulses per rotation of the paddlewheel, where the voltage toggles between 0V and between 5 and 8V. If you saw a static voltage, this would mean no speed signal from the transducer.

If there's a valid echo at shallow depth, the display will keep picking this up after the breaker is reset. It's not likely to be a product fault, it's likely to be a real signal on the cable, what we need to find out is where that's coming from. Noise (200kHz acoustic or electrical) or an echo from the keel are the common causes. If a keel echo is the cause, the only solution is to move the transducer further away, I'm sorry to say. How close is the transducer mounted to the keel?

Regards,
Tom