Specifications

MT-550 13
5.3 Basic Operation
Power On/Off
Power to the transceiver is controlled with the VOLume knob. When the VOL knob
is in the full CCW position the unit is turned Off.
To turn the transceiver On:
• Rotate the VOL knob CW until it clicks over the detent. The LCD backlight
illuminates and the Power-On screen appears.
INT
M-TECH
CODE 000.00
Power-On Screen
After approximately two seconds, the Normal Communication screen appears in the
display.
INT
16 PRI. HI
MEM CHANNEL
N 28 04.814
W 83 42.169
INT
16 PRI. HI
MEM CHANNEL
99 99.999
999 99.999
Normal Com Screen Normal Com Screen
with GPS Connected w/o GPS connected
To turn the transceiver Off:
• Rotate the VOL knob CCW until it clicks over the detent to the OFF position.
Volume and Squelch
The VOLume and SQuelch controls have each knob. They are independent controls
but work together to control audio output from the speaker. The volume control
sets the loudness of sound from the speaker and the squelch control is used to mute
background noise when no received signals are present.
To properly set the VOL and SQ controls:
• Rotate the SQ knob fully CCW.
• Rotate the VOL knob CW until background noise is plainly heard.
• Slowly rotate the SQ knob CW until the noise is muted (squelched). Then
adjust the control slightly more CW (approximately 1/8 turn). Use care not
to set the SQ control more CW than necessary or weak signals may not be
heard.
Some channels exhibit more background noise than others, so it may be necessary
to readjust the squelch setting when changing channels or when scanning.