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 SE lECTORuprovides 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 PUSH BUTTON --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 FEA TURE--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
-5-
