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Guest
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 Posted:
Wed Feb 02, 2005 11:03 am Post subject:
12/ Manufacturers have NO SPEC. on the Wireless equipment, i |
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Manufacturers technical specification data allow you to know the
quality of the different proposed equipment's and brands.
Ask for them.
How can professional keep telling you that the equipment they sell is
reliable when manufacturers don't produce a specification clarifying
the Radio Frequency Interference (RFI) aspect of wireless alarm
systems who provide you with a warranty close?
- Why do manufacturers not publish receiver bandpass (6db & 60db
points), image frequency attenuation at 2xIF frequency,
Intermodulation figures, IF signal rejection data, outbound frequency
worst attenuation figure, and ++ in order to proof that they're system
is of good quality and well designed to avoid "utmost" possible RFI?
- Why do manufacturers not state that they tune the receiver to the
different hopped frequencies when they use spread spectrum to avoid
RFI or do they not tune-in on each frequency and increase the
bandwidth who open the receiver even more for/to RFI? What is the
frequency band spread used?
- Why do manufacturers simply not pretend/specify based on
measurements, with technical data as a support, that they're system
detect RFI at a specified time span and state what type of detection
they use to avoid false alarms?
Why, WHY?
When you purchase an electronic equipment, a audio amplifier system
for instance, do you not look at the specification to see what's the
power, the amplifier audio response bandwidth and distortion, the
speaker quality even if you don't know all the finesses of it?
The receiver/sensor data transmission is the MAIN DIFFERENCE between
WIRELESS and WIRED alarm systems, WHY IS THERE NO MANUFACTURER SPEC.
AVAILABLE on the subject?
ASK FOR RECEIVER/TRANSMITTER SPEC.'S
- About the sensor/control panel wireless data loop,
- That the manufacturers state the RFI reliability they are
warranting, compare brands and decide.
Don't let so-called pro's bluff you with empty marketing slogans!
Newbees, don't rely on wireless alarm stuff, go wired.
Paul
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Guest
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| Posted:
Wed Feb 02, 2005 6:31 pm Post subject:
Re: 12/ Manufacturers have NO SPEC. on the Wireless equipmen |
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|......... wrote:
| Quote: | Manufacturers technical specification data allow you to know the
quality of the different proposed equipment's and brands.
Ask for them.
How can professional keep telling you that the equipment they sell is
reliable when manufacturers don't produce a specification clarifying
the Radio Frequency Interference (RFI) aspect of wireless alarm
systems who provide you with a warranty close?
- Why do manufacturers not publish receiver bandpass (6db & 60db
points), image frequency attenuation at 2xIF frequency,
Intermodulation figures, IF signal rejection data, outbound frequency
worst attenuation figure, and ++ in order to proof that they're
system
is of good quality and well designed to avoid "utmost" possible RFI?
- Why do manufacturers not state that they tune the receiver to the
different hopped frequencies when they use spread spectrum to avoid
RFI or do they not tune-in on each frequency and increase the
bandwidth who open the receiver even more for/to RFI? What is the
frequency band spread used?
- Why do manufacturers simply not pretend/specify based on
measurements, with technical data as a support, that they're system
detect RFI at a specified time span and state what type of detection
they use to avoid false alarms?
Why, WHY?
When you purchase an electronic equipment, a audio amplifier system
for instance, do you not look at the specification to see what's the
power, the amplifier audio response bandwidth and distortion, the
speaker quality even if you don't know all the finesses of it?
The receiver/sensor data transmission is the MAIN DIFFERENCE between
WIRELESS and WIRED alarm systems, WHY IS THERE NO MANUFACTURER SPEC.
AVAILABLE on the subject?
ASK FOR RECEIVER/TRANSMITTER SPEC.'S
- About the sensor/control panel wireless data loop,
- That the manufacturers state the RFI reliability they are
warranting, compare brands and decide.
Don't let so-called pro's bluff you with empty marketing slogans!
Newbees, don't rely on wireless alarm stuff, go wired.
Paul |
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