Furuno FS-1570 - Manual (Page 27)

2 SSB RADIOTELEPHONE
2-3
Choosing frequency
1. Rotate the [ENTER] knob to choose TX or RX as appropriate and then push the
[ENTER] knob.
TX: 2182.0 KHZ
VOL
SEN S
AGC : SLOW
IA 0.0A
MODE: AM SIMP HIGH
CH: 200
Rx: 123456.78 KHZ 2182.00 KHZ
2. Enter frequency by one of the methods below.
Entering frequency with the numeric keys:
Use the numeric keys to enter frequency and then push the [ENTER] knob. You may
choose location with the [FILE/CURSOR] key. Be sure to including trailing zero. For
example, to enter 2161 kHz, key in [2], [1], [6], [1], [0]. (Keying in 2-1-6-1 will set 216.1
kHz.)
Choosing frequency with the ENTER knob (for RX only):
a) Use the [FILE/CURSOR] key to choose digit to change.
b) Rotate the [ENTER] knob to set digit.
c) Push the [ENTER] knob.
Note
: To enter same frequency for both TX and RX, enter the TX frequency first.
2.1.3 Tuning
Maximum transmission power is achieved only when the antenna impedance and
transmitter impedance match each other. Because the antenna impedance changes with
frequency, a means must be provided to match (tune) the antenna impedance with the
transmitter impedance. This is done with the antenna coupler. The antenna coupler
automatically tunes the transmitter to a wide range of different antenna lengths, from 7 to
30 m.
To initiate the automatic tuning, do the following:
1. Press the PTT switch on the handset or the [LOG/TUNE] key on the control unit.
“TUNING” appears when the [LOG/TUNE] key is pressed; “TX” pops out when the PTT
switch is pressed.
Tuning will be completed within 2 to 5 seconds for a newly selected frequency, or less
than 0.5 seconds for a once-tuned frequency. (A memory saves coil and capacitor
settings.) When the tuning process is successfully completed, TUNING: OK appears. If
tuning fails, TUNING: NG appears.