TN182 Battery Level Reporting and Remote P25 Test Tone
MT-4 Radio Systems
TECHNICAL NOTES
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TN182, REV 1-0-0, © Mar 2017
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Remote Keying of 1011 Hz P25 Test Tone
This feature is only applicable to P25 digital mode. When the receiver receives a DTMF code of **123 (or any
three-digit programmed ID code), it will initiate the transmitter with the corresponding three digit value (ID code of
123) to key up and transmit the1011 Hz P25 Test Tone.
• ** marks the beginning of a DTMF command code for requesting remote keying of 1011 Hz test tone in P25 mode.
• The three 0 to 9 plus A, B, C, D digits is the ID code of the transmitter being requesting to do the remote keying
of 1011 test tone.
• The duration of the 1011 Hz P25 test tone transmission is user programmable (can be set to infi nite).
• The 1011 Hz P25 test tone transmission can be stopped by another PTT from a subscriber radio.
• The pattern being generate is the Standard Tone Test Pattern as per TIA-102.CAAA Section 1.3.3.7 a).
• This feature must be enabled via RSS for both the receiver and transmitter.
Figure 2: Transmitter Remote 1011 Test Tone
Figure 3: Receiver Remote 1011 Test Tone
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