SATEL-TR489
Integration Guide, Version 0.9
37
10.1
Sub-band Channel Assignment
–
SATEL-TR489
Note! Supported only with 800 MHz band
Sub-band
Each sub-band is defined by a start and stop frequency. Furthermore, the maximum allowed
power level and maximum duty cycle is defined separately for each sub-band.
Duty cycle
The purpose of the duty cycle limit is to ensure that no single application can occupy this license-
free band for more than a certain percentage of time. The term duty cycle defines the percentage
of a 1-hour period a single modem is allowed to transmit. The modem limits the duty cycle itself.
Power level
The power level limit is defined separately for each sub-band. The maximum power limit for each
sub-band is pre-programmed into the SATEL-TR489. The user can choose from 10, 20, 50, 100,
200 and 500 mW ERP* output power for frequency variant 856
…87
6 MHz. No matter what power
level the user has chosen the maximum allowed power level of the chosen sub-band cannot be
exceeded.
*ERP = The effective radiated power from the antenna relative to a half-wave dipole in a certain
direction
Channel assignment
Each sub-band is divided into 25 kHz channels according to a channel assignment scheme defined
by the recommendation CEPT/ERC/REC 70-03.
10 APPENDIX
