Magnum 257, Руководство по эксплуатации

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10. CLAR \ FUNC
CLAR: Clarifier. The clarifier shifts both the TX and
RX frequency 1.5 kHz each side of the center fre-
quency. This is necessary for tuning to an SSB signal.
Rotate the clarifier control clockwise or counterclock-
wise to tune an SSB signal.
FUNC: Function. This control is used to operate the
six control buttons on the front panel that are printed in
blue. Press slightly and release, FUNC will be displayed
on the LCD indicating that the function command is
activated. After you have pressed one of the buttons
the FUNC will disappear from the screen.
11. FREQ: Frequency. Rotate clockwise or counterclock-
wise to select the desired frequency.
12. OFF / VOLUME
OFF: Turns the power to the radio on and off.
VOLUME: Adjusts the AF gain, or volume of the re-
ceived audio. Turn clockwise to increase and counter-
clockwise to decrease.
14. SQ: Squelch. Used to eliminate background or “white”
noise when monitoring strong signals. Also used to
activate SCAN feature (refer to 8). To properly adjust
squelch circuit, start rotating the control slowly clock-
wise until the received white noise disappears.
15. PWR: Variable RF Output Power. Rotate clockwise to
increase RF output power. Rotate counterclockwise to
decrease RF output power.
Variable RF output power allows low power transmit-
ting for QRP operation in compliance with the FCC re-
quest for reduced signal strength during periods when
propagation levels are high.
16. Push-To-Talk Switch: Press and hold the switch to
transmit. TX will appear on the LCD screen when trans-
mitting. Release the switch to receive.
17. UP / DN: Up and Down Frequency Controls. Press the
UP control to increase in frequency. Press the DN con-
trol to decrease in frequency.
REAR PANEL
1. External Speaker Jack
An external speaker jack is located on the rear panel
of the transceiver. The Magnum 257 is designed to
accept any standard 8 ohm external speaker for use
with two-way transceivers.
OTHER FEATURES
1. PROGRAMMING TONE
This tone sounds each time the CPU is being pro-
grammed. It is helpful, in the beginning so you can be
sure the command has been entered. You may elimi-
nate the tone by simply pressing the PTT switch on the
microphone and turning on the ON/OFF POWER switch
at the same time.
2. Memory Back Up
The 257 features a super-capacitor back up for the 5
memory channels. The 257 can be disconnected from
a power source for approximately 4 or 5 days before
the memory is lost.