Crestron STX-1700CXPW Operation Manual page 7

Crestron STX-1700CXPW
Operations Guide – DOC. 6249A
Wall Mount 2-Way RF Wireless Touchpanel
through 4 (France, Spain, Japan, and Canada) are intended for use in Cresnet systems
outside the US.
If you have two or more Crestron wireless RF devices in the Cresnet system, they
should all be set to the same band. If your system includes non-Crestron RF devices,
set the Crestron RF devices to a different band than the non-Crestron devices to
minimize the possibility of interference between them.
When configuring a Cresnet system that includes Crestron RF wireless devices that
broadcast in the 2.4 GHz spectrum, in a facility that also contains one or more
802.11b-compliant RF devices, it is important to bear in mind how each
implementation uses the frequency bandwidth, and how they may interact.
The 802.11b spectrum ranges from 2400 MHz to 2497 MHz, and is divided into
channels spaced at 5 MHz intervals. Each channel, though, is 22 MHz wide (±11
MHz around the center frequency), which results in some overlap between channels.
For instance: Channel 1 is centered at 2412 MHz, but extends from 2401 MHz to
2423 MHz, overlapping Channels 2 through 5; Channel 6 is centered at 2437 MHz,
but extends from 2426 MHz to 2448 MHz, overlapping Channels 2 through 10. In an
installation with two or more 802.11b RF devices, the use of Channels 1, 6, and 11 is
safest since that choice produces no overlap.
As described earlier, Crestron RF devices make use of bands that define frequency
ranges within the same spectrum. For example, Band 5 uses frequencies that
correspond to 802.11b Channels 1 through 5, but do not overlap Channels 6 and
higher. Band 9 uses frequencies that correspond to Channels 5 through 13, but do not
overlap Channels 4 and below. The goal is to select bands for the Crestron RF
devices and channels for adjacent 802.11b devices to minimize or eliminate overlap
between them. For example, if the Crestron devices are set to Band 5, and nearby
802.11b devices are set to Channels 6 and/or 11, there is no overlap.
Gateway Compatibility
The ability to select frequency bands makes it possible for the STX-1700CXPW to
communicate with TPS-RFGWX two-way RF transceivers (gateways) that are Wi-Fi
friendly as well as those that are not. TPS-RFGWX gateways that are Wi-Fi friendly
(include band selection) have product labels that include a seven-digit number
beginning with 600 (e.g., 6002104). Product labels on earlier models of the
TPS-RFGWX gateway (fixed band; not Wi-Fi friendly) include seven-digit
alphanumeric codes beginning with ZA (e.g., ZA11308). Similarly, Wi-Fi friendly
TPS-RFGWX gateways can communicate with touchpanels that are not so enabled
as well as those that are. In either case, in order to communicate, the TPS-RFGWX
gateway and STX-1700CXPW touchpanel must be set to the same band and have
identical identity code settings (refer to "Identity Codes" on page 11 for details).
Wall Mount 2-Way RF Wireless Touchpanel: STX-1700CXPW • 3