Compal Electronics Inc PICONODE Manual De Usuario
PicoNode Integration Specification
41
11 Errata
Degraded RF Channels
Ingenu and their partners are deploying networks globally. They carefully manage the
frequency allocations of these networks to avoid using the 3 (out of 38 possible) RF channels
described below. RPMA networks can deploy overlapping coverage (ie. all Access Points) on a
single 1MHz RF channel. The other channels are held in reserve for future use or special cases.
Three lower performing channels are listed below, for reference.
frequency allocations of these networks to avoid using the 3 (out of 38 possible) RF channels
described below. RPMA networks can deploy overlapping coverage (ie. all Access Points) on a
single 1MHz RF channel. The other channels are held in reserve for future use or special cases.
Three lower performing channels are listed below, for reference.
The picoNode uses a Channel scheme such as the following:
Channel 1 = 2402 MHz and each successive channel is 1.99 MHz offset to that Channel 1.
Channel 2 = 2403.99 MHz
Channel 3 = 2405.98 MHz
Etc.
The picoNode uses a 26 MHz reference clock for processing and for the direct conversion radio.
It has been found that 26 MHz harmonics can create strong tones that cause some RF
sensitivity degradation on these harmonic channels.
It has been found that 26 MHz harmonics can create strong tones that cause some RF
sensitivity degradation on these harmonic channels.
93*26 MHz = 2418 MHz. This affects channel 9.
94*26 MHz = 2444 MHz. This affects channel 22.
95*26 MHz = 2470 MHz. This affects channel 35.
System integrators should NOT use these 3 channels as picoNode RX sensitivity can be
degraded by a nominal 3-10 dB.
degraded by a nominal 3-10 dB.