Motorola PMP 400 Series Supplement To User’s Manual page 8

PMP 400 and PTP 200 Series Canopy User Guide Supplement
Figure 3: PMP 49400 AP with connectorized radio and antenna
A Canopy CMMmicro or CMM4 provides synchronization and power to the PMP 400 Series APs
and PTP 200 Series BHMs. A 600SSC surge suppressor, a successor to the 300SS and 600SSB
surge suppressors, provides over-voltage and over-current protection to APs, SMs, and BHs in
various configurations.
2.1 TECHNOLOGY AND BENEFITS
These radios automatically select QPSK (Quadrature Phase Shift Keying), 16-QAM (Quadrature
Amplitude Modulation), or 64-QAM based on RF environment to provide 1X, 2X, and 3X
operation, respectively. This provides 3 speeds and a throughput of over 20 Mbps aggregate
(sum of up plus down) compared to FSK Canopy products with 2 speeds and a throughput of up
to 14 Mbps.
The OFDM radios feature lower receive sensitivity, FEC (Forward Error Correction), and higher
antenna gain, all of which combine to provide longer range within regulatory-specified EIRP
(Equivalent Isotropic Radiated Power).
Details on performance are listed in Table 2 on page 12.
The PMP 400 and PTP 200 Series radios use an OFDM physical layer with 10 MHz channels and
256 sub-carriers. Due to the different carrier and modulation schemes between these OFDM
radios and FSK Canopy radios, the two do not interoperate over the air. For example, an OFDM
SM cannot connect to an FSK AP.
Issue 3, January 2009 Page 8 of 45