Furuno ETR-30N Operator's Manual page 29

Transducer connected to the ETR-30N is not programmed in the ETR-30N
For the transducer not programmed in the ETR-30N, enter its frequency manually as below.
1. Follow the procedure on page 7 to shown the INSTALLATION SETUP menu.
2. Press the NETWORK SOUNDER SETUP soft key.
3. Press the FREQ SETUP soft key.
4. Press the EDIT soft key.
5. Use the [ENTER] knob to select MANUAL and then push the [ENTER] knob.
6. Use the [ENTER] knob to choose HIGH FREQUENCY and then push the [ENTER]
knob.
7. Use the [ENTER] knob to choose frequency (setting range: 25 kHz-220 kHz) and then
push the [ENTER] knob. Currently, 12-24.8 kHz and 221-420 kHz cannot be set. These
frequencies are for future use.
8. If a low-frequency transducer is installed, set it similarly.
9. Turn off the NavNet display unit.
10. Turn on the Navnet display unit. Confirm that the echo sounder picture advances.
CAUTION
Do not enter transducer specifications
manually if the transducer is programmed
in the equipment.
The transducer may become damaged.
TRANSDUCER SETUP
MODEL NUMBER
MANUAL
Transducer type setting options
HIGH FREQUENCY
12.0kHz
Frequency input screen
11