1. In Brazil within the frequency band 902-928 MHz, the sub-band 907.5-915 MHz
is only allowed for celular phones. No other equipment including RFID readers is allowed to operate in this band of frequencies and no exceptions.
2. RFID readers and other equipment are allowed to be opertated in the sub-bands
902-907.5 MHz and 915-928 MHz where there are no restrictions of use.
3. Frequency hopping is allowed in the bands 902-907.5 MHz and 915-928 MHz.
4. The number of channels is determined by the following rules:
a) If the bandwidth of channels is less than 250 kHz, it is necessary to use at least
50 hopping channels. Channels may be distributed between bands 902-907.5 MHz and
915-928 MHz. Bandwidth of channels should be measured at 20 dB.
b) If the bandwidth of channels is greater than 250 kHz, it is necessary to use at
least 25 hopping channels. Channels may be distributed between bands 902-907.5
MHz and 915-928 MHz. Bandwidth of channels should be measured at 20 dB.
c) For both a) and b) above, the average occupation time for any hopping channel
should be less than 0.4 seconds in an interval of 10 seconds.
d) Maximum bandwidth of hopping channels is 500 kHz.
e) Carriers of hopping channels must be spaced at least by 25 kHz or by the
bandwidth(at 20 dB) of hopping channels. The greater of these two values should
be used as minimum spacing.
5. For systems with number of hopping channels between 25 and 50, the maximum output
peak power level should be less than or equal to 0.25 watt. Systems with more
than 50 channels may have maximum output peak power levels less than or equal to 1
watt.
6. Systems may use antennas with gains below 6dBi with no alteration in power levels
mentioned above. If antennas with gains greater than 6 dBi are used, the maximum
peak power level must decreased by tha amount in dB which the antenna gain
exceeds 6 dBi.
It is not mandatory that all systems should use more than 50 hopping channels. Systems with at least 25 hopping channels are permitted, but with smaller maximum output power levels.
PETER S. MERGUERIAN
peter@goglobalcompliance.com
GO GLOBAL COMPLIANCE, INC.
Tel: (408) 416-3772
Fax: (408) 416-3224
Cell: (925) 487-4640
Skype: petermerguerian
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