Tait International Limited TMBH7A Manual Do Utilizador

Página de 142
 Getting started  23
About P25 digital radios
Your P25 digital radio can be programmed for P25 
conventional or P25 trunked operation. Analog 
conventional operation is also available, with dual-
mode channels able to transmit and receive both 
digital and analog calls.
You may notice differences between digital and 
analog calls in terms of:
static noise in low signal areas, and
radio coverage in marginal reception areas. 
Lack of static noise
On digital networks there is no static noise, even in 
low signal areas. This lack of static is because your 
digital radio removes the ‘noise’ from the call, so that 
you hear only clear voice.
Coverage
With digital networks, a call remains clear and then 
drops off quickly at the border of a coverage area. The 
reason for this is that a digital call is either received or 
it isn't. With analog networks, the background noise in 
a call gets progressively worse when you are in fringe 
areas or even slightly outside normal coverage areas. 
P25 phase 2 digital operation
This feature is controlled by a software license 
(SFE) and may not be available with your radio.
TM9400 radios are software-upgradeable to P25 
phase 2 operation. Contact your radio provider for 
more information on software releases and P25 
phase 2 availability for your radio.