We recommend using a high-quality telemetry cable, such as the RG214 coaxial cable or an impedance-controlled shielded twisted-pair
cable. The chosen cable should be similar to those of antennas with carrier frequencies up to around 1 MHz.
The third-wire deck cable installed on fishing vessels is primarily coaxial, but twisted-pair cables have been used in a few
cases. Each type of cable has its pros and cons. But, regardless of the cable construction, an overall shield is required to minimize noise.
Twisted-pair cables are the only effective means of minimizing noise from low-frequency magnetic fields (primarily originating
from power cables). However, unshielded twisted-pair cables have limited effectiveness in rejecting noise at higher frequencies and should not
be used. Shielding provides an electrically conductive barrier to prevent electromagnetic interference.
Coaxial cables have less attenuation and can be used over a wider range of frequencies than twisted-pair cables. Coaxial cables are most suitable for single-ended circuits with the outer shield grounded and acting both as a shield and
as the signal return. To minimize noise, use a shielded coaxial (triaxial) cable with appropriate shield grounding techniques.