4 receiving, 1 rf gain (sensitivity) adjustment, 2 s-meter – Furuno FS-5070 User Manual

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2. SSB RADIOTELEPHONE

2-5

Checking the transmitting power

During transmission, the IA bar deflects according to the current being fed to the antenna
feeder from the antenna coupler. The unit of readout is amperes. The antenna current
varies with the effective antenna impedance. The reading differs by the frequency and
antenna length. The output power is proportional to the square of an antenna current.

Antenna Current

2.1A

SSB SIMP HIGH FAST NB SQ

SEN

MMSI xxxxxxxxx

35 00.0000N

135 00.0000E

CH:

200

Tx:

2182.0 kHz

Rx: 2182.00 kHz

UTC 00:00
EPFS 23:59

POS

2.4 Receiving

Check if the emission mode and receiving frequency are set properly. If necessary, set them
again referring to section 2.1 and 2.2.

2.4.1

RF gain (sensitivity) adjustment

In normal use the sensitivity should be set for maximum. If the audio on the received
channel is unclear or interfered with other signals, adjust (usually reduce) sensitivity to
improve clarity.

1. Rotate the ENTER knob to choose SEN in the equipment states area and then push the

ENTER knob.

SEN

2. Rotate the ENTER to adjust and then push the ENTER knob.

2.4.2 S-meter

The S-meter shows relative signal strength coming into the receiver front end. Note that the
S-meter does not function when the AGC is turned off.

S-meter

Equipment states area