Standard Horizon HX600S, Руководство пользователя

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HX600S Page 19
[ H/L ] key for about one second. This locks the
[ S ] and [ T ] keys and all the front panel controls
except the [ H/L ], PTT and SQL keys. The “ ”
symbol will appear on the display to indicate that
the keypad is locked. Hold down the [
H/L ] key for about one second to
unlock the keys. The “ ” symbol will disappear from the display.
6.3 TRANSMISSION
1. Perform steps 1 through 6 of the RECEPTION discussion above.
2. Before transmitting, monitor the channel and make sure it is clear.
THIS IS AN FCC REQUIREMENT!
3. For communications over short distances on the Marine band, press the
[ H/L ] key until “ ” is displayed on the LCD. This indicates Low power
(approximately 1 watt).
Note
Transmitting on 1 watt prolongs battery life. Low power (1 watt)
should be selected whenever possible.
4. If using Low power is not effective, select Medium
power (2.5 watts) or High power (5 watts) by press-
ing the [
H/L ] key until “ ” (Medium power) or
“ ” (High power) is displayed.
5. When receiving a signal, wait until the incoming signal stops before trans-
mitting. The transceiver cannot transmit and receive simultaneously.
6. Press the PTT ( P ush- T o- T alk) switch to transmit. The “ ” indicator is
displayed during transmission.
7. Speak slowly and clearly into the microphone. Hold the microphone about
1/2 to 1 inch away from your mouth.
8. When the transmission is finished, release the PTT switch.
For an overview of VHF Marine band operating procedures refer to section 3 .
6.3.1 TRANSMIT TIME - OUT TIMER (TOT)
While the PTT switch is held down, transmission time is limited to 5 minutes.
This prevents prolonged (unintentional) transmissions. About 10 seconds
before automatic transmitter shutdown, a warning beep sounds from the
speaker. The transceiver automatically switches to the receiving mode, even
if the
PTT switch is held down. Before transmitting again, the PTT switch
must first be released, and then pressed again. This T ime- O ut- T imer (TOT)
prevents a continuous transmission that would result from an accidentally
stuck
PTT switch.