Midland Radio MO-1016, MO-1008, MO-4008, MO-4016 manual CTCSS/DCS Operation, Tone Operation

MO-1008 / 4008 / 1016 / 4016 User’s Guide

threshold level will be indicated by a steady green Tx/Busy indicator.

CTCSS/DCS Operation

CTCSS or DCS signaling adds an additional condition to carrier squelch operation. In addition to the signal having to exceed the squelch threshold level, the received signal must also have the correct CTCSS or DCS tone or code before the audio will be passed to the speaker. CTCSS or DCS signaling allows multiple users on the same frequency to hear only signals which have their correct CTCSS tone or DCS code. An on frequency signal with the correct CTCSS or DCS signaling will be indicated by a steady green Tx/Busy indicator. An amber Tx/Busy indicator means that the channel is busy, but the correct CTCSS or DCS signaling is not present.

CTCSS/DCS allows multiple users to share the same frequency. However CTCSS/DCS is only useful to avoid disturbing other users with messages not related to them. If more than one radio is transmitting at the same time, this will cause interference. Do not transmit if the Tx/Busy indicator is illuminated green or amber. Wait until the channel is clear before transmitting.

2-tone Operation

2-tone signaling allows individual or group calls to be made to your radio. The radio may have been programmed to mute all receive signals until a 2-tone signal has been decoded. When the programmed 2-tone signal is decoded, the Tx/Busy indicator will blink green, a beep sequence may sound, and subsequent receive audio will be heard over the speaker. The radio may be programmed to mute the speaker again after a programmed time, or you may press and hold the programmed Call Reset function button to mute the radio until it receives a new call.

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