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5. KEYBOARD CHANNEL SEL:ECTOR--Selects the desired channel. lCD display
shows CH-1 through CH-88. For channels 1 through 9, first you must depress "0"
, then the desired channel number. If you attempt to enter channels 29, 75, 76 or
89, the letter "E" will flash in the LCD display. To continue normal use of the
radio, make a proper channel selection.
6. HAilER/INTERCOM PUSHBUTTON--Disables the transmitter and allows use
of an optional hailer speaker or intercom speaker (both sold separately). Jacks
clearly labeled "HAIL" and "INTERCOM" are provided on the unit's rear panel
for easy connection. To operate the hail function, first push the "HAI L" push-
button, ("HAIL" will appear on the LCD display). Next speak into the
microphone while adjusting the VOLUME control. To operate the intercom
function, first push the "HAI L" pushbutton. ("HAI L" will appear on the LCD
display.) Next speak into the microphone and you will be heard through the
intercom speaker. Also persons talking into the intercom speaker will be heard
through the radio speaker. To return to transceiver operation from either the
Hail or Intercom mode, simply depress the "HAIL" push button a second time.
7. INTl/USA SElECTORuprovides for USA frequency/channel system or for
International channels. lCD displays "USA" or "INTl."
8. 1W/25W SElECTOR--Controls transmitter output power.' The 1W (Watt)
position should always be used for in-port or short range communications. LCD
displays either "1W" or "25W."
9. DIM CONTROluThis control is used to adjust the brightness of the LCD and
the keyboard back lighting for night operation.
10. CHANNEL 16 PUSHBUTTON --Provides instant Channel 16 selection, overrid-
ing the CHANNEL SELECTOR.
11. WATCH PUSHBUTTON (DUAL WATCH FEATURE)--Provides for automatic
monitoring of Channel 16. Push "WATCH" and LCD displays "WATCH" and
Channel 16 to show that the priority channel is Channel 16 and that the watch is
set. Now select any other legal channel and every 2 seconds the receiver will
leave the main channel and sample activity on Channel 16. If activity is found,
receiver will remain on Channel 16 until message is complete. Channel 16 thus
has priority over the main channel. To disable the watch function, push
"WATCH" again.
An important feature of the MC 724 is the operator's ability to change the
watch channel to any legal channel. To do this, first go to the channel desired
using the channel selector switch. Now push "WATCH PROGRAM" key.
Channel number in display will blink. Now push "WATCH". Watch is now set
and LCD display shows new priority (watch) channel.
12. SCAN FEATURE--Any number of Marine channels can be scanned by the
MC 724. First they must be entered into the memory using the "ENTER" key.
To do this, first select a channel using the channel selector and then push
"ENTER." A small horizontal bar will appear above the LCD channel display
indicating that channel is now in memory. Repeat this until all desired channels
have been entered. Now push "SCAN." The LCD display will show the scanning
action by successively lighting segments of the unit's digit. The channels selected
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