Not all batteries have the shelf life on the label.<br><br>You don't mention the construction of the battery. That's the governing factor. Rules of thumb:<br><br>Carbon 6...
Single point grounding is THE way to go. Grounding at multiple points leaves you open to a number of problems. The biggest is that if you have a piece of equipment that is leaking current (which is why you ground equipment), it can cause a potential in your...
The standard that has been used for testing electrical produsts come from the IEEE, FCC, UL, and US military. The best ones are then made official by being accepted by ANSI. All of the standards are backed up by standardized tests.<br>
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The IEEE (Institute of Electrical and Electronic...
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Your best bet is Motorola. The typical key fob TX works in the 900 MHz band. Motorola makes commercial pagers that already work in the band. They make those units that resterants(sp?) use. That would reduce the problem to getting the paging formats right. You may even be able...
I am looking for a low cost RF Field Strength Meter. It should be tunable to a specific frequency in the 800 MHz band. I also need it to be handheld, and portable, especially battery powered.<br>
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I'd like to use this for 2 purposes: Measuring the signal strength from an antenna for...
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You already have a measurement in dB. <br>
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The notation you have denotes a difference in dB from a reference level. The particular reference level is conveyed by the notation: dBA. <br>
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If you were to have an loss in your system, say a curtain that absorbed 30 dB of...
