Computime Limited CT-EM2503 ユーザーズマニュアル
CT-EM250
ZigBee-Ready RF Transceiver Modules
Computime Ltd. All rights reserved
Confidential
Page 10 of 15
RF Frequency, Output Power Levels and Data Rates
The following table shows the RF channels as defined by the IEEE 802.15.4
The output power level can be configured in the range -32 to 5 dBm. The RF
transceiver uses direct sequence spread spectrum (DSSS) with a raw data rate of 250
kbit/s. The modulation format is Offset – Quadrature Phase Shift Keying (O-QPSK). It
is robust even under noisy environments when sharing the same frequency band with
other applications.
The use of RF frequencies and maximum allowed RF power should according to
different national regulations. The CT-EM250 is complying with the applicable
regulations for the world wide 2.4GHz ISM band.
[Subject to final approval: Specifically it complies with the European Union R&TTE
directive meeting EN 300 328 and EN300 440 class 2. It also meets the FCC CFR47
Part15 regulations for use in the US and the ARIB T-66 for use in Japan.]