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MX920 Base Station & Repeater
When CTCSS is enabled the channel remains quiet until someone transmits
using the same tone. Should the receiver be setup for the reception of a
signalling tone, the 'Green RX LED' lamp with be on, also if it contains
the correct tone the 'Yellow Tone LED' lamp will be lit, and audio out of
the speaker will then be heard. When the transmission ends, the channel
becomes quiet again. By using different tones, several groups of people can
share the same channel without disturbing each other.
NOTE: If an incoming signal is very weak and is close to the minimum
squelch level, it may become broken or "chopped" by the squelch action.
To prevent this, simply open the squelch to allow the signal to be heard
clearly. Alternatively, you can reduce the squelch sensitivity as described
above to block out unintentional weak signals.
♦
Front panel Channel Change Control
Refer to Section 2.3.1.3 for channel select method.
Table 1-1 below explains the functions of the front panel LED's. Each LED indicates
the status of the MX920 in real time. As the LEDs are also software programmable, it
is also best to check the settings in software.
LED
POWER
RX
TX
TONE
ALARM
REPEATER
Switch
REPEATER
ACCESSORY
COLOR
FUNCTION
BLUE
Indicates the power supply voltage is within
limits. A flashing display indicates that
battery operation is current. No display
indicates the voltage is not normal.
AQUA
A signal is being received by the receiver or
the receivers squelch is open.
RED
The transmitter is transmitting RF power.
YELLOW
A valid Continuous Tone Coded Squelch
Signal (CTCSS) or Digital Coded Squelch
(DCS) or 5 Tone signal has been detected.
ORANGE
A prearranged alarm condition exists.
GREEN
The local repeater mode has been activated
Table 1-1 LED Functions
FUNCTION
Selects local Repeater mode
Software programmable
Table 1-2 Switch Functions
Technical Manual
2003 Revision
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