Furuno FCV-1200L Service Manual page 40

The transmission voltage is twice the voltage between G and A (or G and B).
3. The transmission voltage divided by 16 is "Supply Voltage".
4. Enter the voltage value, a little lower than that of "Supply Voltage" obtained in step 3, into menu.
5. Connect the transducer to the FCV-1200L and measure the transmission voltage.
6. Re-enter the "Supply Voltage" so that the transmission voltage becomes the same value as
measured in step 2.
Basically the transducer, whose output power is over 3 kW and not listed on the XDCR TYPE menu,
is not allowed to connect to the FCV-1200L because of the maximum output power of internal
transmission circuit of the FCV-1200L is 3 kW.
A
Transmission
(Vpp)
voltage
B
Figure 6.4 Measuring point
37
G