Both Watches and Weather Channel [VHF-FRS]
If both the Weather Alert and the TripleWatch features are enabled when you press SCAN/MEM, the radio starts checking the memory channels in ascending order. Then it checks Channel 9 and 16 every 2 seconds and finally, it checks the active weather channel approximately every 7 seconds, looking for the alert tone (1050Hz). The radio then repeats the cycle. If the radio detects a weather alert tone during the check cycle, it remains on the weather channel until you disable the weather mode.
~7 seconds
2 seconds 
CH 07A
CH 08A
CH 10
CH 21A
CH 22A
CH 64A
CH 79A
CH 80A
09
16
09
16
WX
ALERT
TONE
= Channel Check | Scan Sequence of Stored Channels, | |
TripleWatch, and TripleWatch with WX | ||
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Notes:
•If during scanning, the radio detects a signal, it stops scanning and remains on the detected channel for 2 seconds after the activity ends before resumption of scanning.
•During scanning, you can press SCAN/MEM, 16/9/TRI, or WX/ALERT to halt scanning. Depending upon which key you used, the screen shows one of the scanned channels, your local weather channel, or the distress channel.
•All channels, except CH70, and the weather channels, can be stored in memory. When you turn off the radio, all
Uniden MHS550 Radio Owner’s Manual | 53 |