>From >http://www.cypressenvirosystems.com/wp-content/uploads/2010/07/Wireless-Pneumatic-Thermostat-Wireless-and-Server-FAQ.pdf
Q. What is the RF transmit output power of the WPT? A. The peak output power is +20dBm (100mW). Q. Does the WPT radio cause interference with other existing wireless devices? A. Extensive testing has shown that our wireless solution has no discernable impact on other wireless technologies, such as Bluetooth and Wi-Fi. One of the key reasons is the low duty cycle of 1/60000. The WPT only transmits for 1ms out of every 60 seconds maximum. Most applications transmit only 1ms every 15 minutes. Another reason is that the WPT radios detect the presence of RF energy from other sources, and automatically change channels to find a part of the spectrum that is unused -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Jeff Paynter Sent: Tuesday, May 24, 2011 9:27 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Experiences with Cypress Envirosystems wireless product? It would be interesting to know what the maximum power level is for these radios, 1mW, 10mW, 100mW? Also are these radios using the entire spectrum from 2.407GHz to 2.467GHz or are they using some type of frequency hopping? Either way it will be noise for the Wi-Fi 802.11b/g/n 2.4GHz, just how much? Unfortunately the only way to verify the amount of noise would be to setup a lab test environment with a spectrum analyzer. Wonder if there are any other vendors using a frequency outside of the 2.4GHz range? Thanks, Jeff Paynter Senior IT Analyst Duke University Health System -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Dave Barr Sent: Tuesday, May 24, 2011 9:37 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Experiences with Cypress Envirosystems wireless product? I second this request, our facilities folks at Cornell are considering doing the same; one is an installation of Cypress in a large building with 100% Wi-Fi coverage that where the primary means of network access is Wi-Fi. The building will require installing 110 thermostats and 8 repeaters. Does anyone have an installation Cypress of this size on their campus? Other wireless thermostat vendor that is working out well with your Wi-Fi system? Maybe on the 900MHz ISM band? Thanks, Dave Barr *************************************************************************** Cornell Information Technologies http://www.cit.cornell.edu David Barr - Information Technology Specialist Email: d...@cornell.edu Phone: 607 255-4703 *************************************************************************** -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Gogan, James P Sent: Monday, May 23, 2011 2:59 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Experiences with Cypress Envirosystems wireless product? Our Utilities folks are looking at deploying the Cypress Envirosystems Wireless Pneumatic Thermostat system on campus for remote temperature monitoring and control. As is so often (too often?) the case with systems like these, (a) they use the 2.4GHz DSSS band (frequencies from 2.407 to 2.467 Ghz) and (b) they're not 802.11/Wi-Fi technologies, but rather their own wireless technology. Their literature maintains that "Extensive testing has shown that our wireless solution has no discernable impact on other wireless technologies, such as Bluetooth and Wi-Fi", but for some reason, I tend to discount vendor testing that doesn't include all of their test methodologies or results. So, have any of you all had any experience with these devices and, if so, seen any impacts either from these devices on wi-fi or from wi-fi systems on these devices? (We get the blame no matter which way the impact.) According to the vendor, these systems are deployed at UCal-Berkeley, Clemson, Stanford and UCLA, so if there are any folks from those institutions out there, please let me know your experiences (or if you were even aware that these were out there). As always, thanks in advance! -- Jim Gogan Director, Networking / ITS University of North Carolina at Chapel Hill ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
