The SDM600 series radios have a carrier noise mute and it is recommended that a
default mute setting of 4 is used. This means that, with a setting of 4, the mute will
open at the point where an analogue signal is sufficiently noise free to be intelligible.
Other settings are as follows:
n 0 - No muting Allows all decodable signals to the radio user’s audio output device
(loudspeaker, headset etc.).
n 4 - Normal default setting.
n 8 - Only reasonably strong signals will be heard.
n 15 - Only very strong or near perfect signals will be heard.
Use the ▴ and ▾ keys to adjust the mute threshold. Press the Select key to save the
selected mute setting and return to the previous screen.
Radio Information
The Radio Information menu provides the User with information about the specific
radio such as the Radio ID, Serial Number, Software Version, and GPS location data (if a
GPS option board is fitted).
Figure 31: Radio Information Menu
Using the up and down keys, select a radio information item from the list. Press the
Select key to display the specific information screen. Examples are shown below in
Figure 32. Note that ‘Radio Info’ screens are read-only screens.
Figure 32: Radio Info Screens
RSSI
The RSSI menu is used to display:
n the received signal strength indication (RSSI) in dBm (typical accuracy is ±2dBm) or,
n the bit error rates (BER) of a digital signal when in DMR mode.
Document Number: TNM-U-E-0145 Issue: 1.0 Page 27
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