Receptors' range is too small for a weather station
in [Basics]
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From: ehsjr on 17 Apr 2010 00:08 Phil Allison wrote: > "ehsjr" > > > >>You may need to set the second transmitter to a different channel. > > > > ** These sorts of devices do not have the ability to select "channels" - Mine do. There's a switch in the battery compartment of the transmitters to select channel 1 or 2 or 3. Here's a reference: http://www.amazon.com/Oregon-Scientific-Wireless-Temperature-Sensor/dp/B000I2Q1P8/ref=pd_sim_dbs_k_1 Quoting from the page: Product Features * Remote, wireless thermometer for Oregon Scientific weather stations * Transmits up to 100 feet from the main unit; requires 1 AA battery * Water-resistant casing and a battery cover * Sets to one of three different channels for tandem transmissions with other sensors * Red LED light notifies when data transmission has been sent End quote > the transmitters send brief bursts of data once every 5 or 10 seconds and > all use the same radio frequency. Right. But the instruction manual refers to transmission and reception of 3 channels, and the display shows the letters "CH" followed by the number of the channel it is monitoring. The other unit I have is a La Crosse http://www.lacrosseweatherandmore.com/IVG2/N/ProductID-80574.htm which also can receive from up to 3 sensors. La Crosse also refers to channels which are selected by a button on the front of the display labelled SET and CH. Ed > > Wireless door bells have the facility to alter modulation CODES so that the > receiver only responds to the matching transmitter - but if two nearby > transmitters are operated simultaneously, then likely neither bell will > ring. > > > > .... Phil > >
From: Phil Allison on 17 Apr 2010 00:38 "ehsjr" Phil Allison > >>>You may need to set the second transmitter to a different channel. >> >> ** These sorts of devices do not have the ability to select "channels" - > > Mine do. ** Not separate radio frequency channels they don't. > There's a switch in the battery compartment of the > transmitters to select channel 1 or 2 or 3. ** Just alters the data code to signal which sensor it is. >> the transmitters send brief bursts of data once every 5 or 10 seconds and >> all use the same radio frequency. > > Right. But the instruction manual refers to transmission > and reception of 3 channels, and the display shows the > letters "CH" followed by the number of the channel it > is monitoring. ** Makers can call a feature whatever they like. The term "channel" is far more easily grasped by the non-technical public. Wireless door bells have the facility to alter modulation CODES so that the receiver only responds to the matching transmitter - but if two nearby transmitters are operated simultaneously, then likely neither bell will ring. The different codes use are often referred to as "channels" - ie 1,2,3, 4 or A,B,C,D. .... Phil
From: Merciadri Luca on 17 Apr 2010 14:10
On Apr 17, 6:08 am, ehsjr <eh...(a)nospamverizon.net> wrote: > Phil Allison wrote: > > "ehsjr" > > >>You may need to set the second transmitter to a different channel. > > > ** These sorts of devices do not have the ability to select "channels" - > > Mine do. There's a switch in the battery compartment of the > transmitters to select channel 1 or 2 or 3. > Here's a reference:http://www.amazon.com/Oregon-Scientific-Wireless-Temperature-Sensor/d... > > Quoting from the page: > Product Features > > * Remote, wireless thermometer for Oregon Scientific weather stations > * Transmits up to 100 feet from the main unit; requires 1 AA battery > * Water-resistant casing and a battery cover > * Sets to one of three different channels for tandem transmissions > with other sensors > * Red LED light notifies when data transmission has been sent > > End quote > > > the transmitters send brief bursts of data once every 5 or 10 seconds and > > all use the same radio frequency. > > Right. But the instruction manual refers to transmission > and reception of 3 channels, and the display shows the > letters "CH" followed by the number of the channel it > is monitoring. > > The other unit I have is a La Crossehttp://www.lacrosseweatherandmore.com/IVG2/N/ProductID-80574.htm > which also can receive from up to 3 sensors. La Crosse also refers > to channels which are selected by a button on the front of the > display labelled SET and CH. > > Ed > > > > > Wireless door bells have the facility to alter modulation CODES so that the > > receiver only responds to the matching transmitter - but if two nearby > > transmitters are operated simultaneously, then likely neither bell will > > ring. > > > .... Phil BLUESKY is quite like some noname products. It consequently does not surprise me to see that there is no possibility to switch channels, etc. for the transmitters. Any idea why one of my two transmitters does not work? Thanks. |