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Re: [RFI] interesting new device

To: rfi@contesting.com
Subject: Re: [RFI] interesting new device
From: k1ttt@arrl.net
Date: Thu, 5 Feb 2004 13:31:02 -0500 (EST)
List-post: <mailto:rfi@contesting.com>
there are already other programmable radio chips like this that cover some
or all of the same bands... making the radios itself doesn't mean they can
be used, different countries have different allocations and/or power
limits for either licensed or unlicensed operation.  what you have to
watch for is who is going to use them and on what frequencies  presumably
the operation of them would either have to comply with power limits for
unlicensed operation or would have to be in licensed devices in the
country where they will be used.

> So there will now be coded/scrambled transmissions on 440?
> (Or so one would guess would be the garbage pouring forth
> from these devices.)
> How will the FCC know if it is one of these devices, a Ham
> running what have previously been disallowed coded comms,
> or a terrorist network using 440 for coordination of their
> illegal activities using Ham gear and signals designed to
> appear as a harmless consumer device?
> Someone needs to fire off another synapse at the FCC and
> make the connection that they have to separate band segments
> and users so one can figure out when something is seriously
> wrong.
> Really low signal-level devices like these alone in a
> band segment would be fine, but mixing them in with higher
> power signals makes illegal ops much more difficult to
> detect.
> IMHO, YMMV ... 73, doc kd4e
> Tom Cox wrote:
>> Ahoy, List,
>> Here's an interesting new, one-chip data radio that could cause us some
>> grief, but might also represent some opportunities for experimenting:
>> http://www.rfglobalnet.com/content/news/article.asp?DocID={116EE7CA-7BD5-49FB-B6E4-F2F0C62CB8B1}
>> Registration may be required, but this is an interesting site. I
>> recommend it.
>> [Partial excerpts:]
>> " Oslo, Norway -- Providing global wireless equipment vendors with
>> 430-950MHz transceiver technology with unsurpassed solution cost,
>> performance, and ease of use, Nordic VLSI ASA
>> <http://www.rfglobalnet.com/ecommcenters/nordicvlsi.html> today
>> introduced the nRF9E5 transceiver with MCU and ADC, as well as the
>> nRF905 transceiver. The nRF9X5 components are designed for wireless
>> transceiver applications in industrial as well as domestic environments.
>> Typical usage includes security systems, wireless data transfer,
>> automatic meter reading, car alarm systems, point-of-sale systems,
>> sensors, and various telemetry systems."
>> Additional features of the nRF905:
>>    * 430-928MHz operation
>>    * 100KHz frequency resolution @ 430MHz
>>    * 200KHz frequency resolution @ 862-928MHz
>>    * 1.9 - 3.6V voltage supply
>>    * 0 - 50Kbit/sec datarate
>>    * Programmable up 10dBm output power
>>    * CRC and address decode
>>    * ShockBurst mode
>>    * 12.5mA Peak RX current
>>    * Clock recovery on data
>>    * -40 to +85°C temperature range
>> [end of excerpts]
>> 73,
>> Tom, KT9OM
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