Sony FS-2570, FS-1570 Tuning, Choosing frequency, Enter frequency by one of the methods below

2 SSB RADIOTELEPHONE

Choosing frequency

1.Rotate the [ENTER] knob to choose TX or RX as appropriate and then push the [ENTER] knob.

MODE: AM SIMP HIGH

CH: 200

	TX: 2182.0				KHZ
	Rx:		2182.00	KHZ	KHZ
	AGC :
		SLOW
SEN				S
VOL				IA		0.0A

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. 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 s for a newly selected frequency, or less than 0.5 s for a once-tuned frequency. (A memory saves coil and capacitor settings.) When the tuning process is successfully completed, TUNE: OK appears. If tuning fails, TUNE:

NG appears.

2-3

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