On Wed, 5 Apr 2023 11:23:03 +0100,
"James Pawson (U3C)" wrote:
> In running through some safety checks on a customer's product I've come
> across what appears to be a conflict between two clauses. This resulted in
> some head scratching! I'm sure it is my misunderstanding or misreading, but
>
On Thu, 6 Apr 2023 11:32:20 +0900,
Youngsik Kim wrote:
> According to FCC part 18.305 FIELD STRENGTH LIMITS, a test article of Any
> type unless otherwise specified has a measurement distance of 300 meters,
> but I want to measure it at a distance of 3 meters because I need to
> measure it in
Not an expert on that standard, but technically speaking.
If indeed both 300 meter and 3 meters are both in the far field of the
transmitting antenna, then the scaling is as 20 log (distance ratio). That
would yield a 40 dB relaxation, so your first answer is correct.
I cannot think of a case
Hi Experts
According to FCC part 18.305 FIELD STRENGTH LIMITS, a test article of Any
type unless otherwise specified has a measurement distance of 300 meters,
but I want to measure it at a distance of 3 meters because I need to
measure it in a chamber.
In this case, what is the limit at 3 meters?
I'm not an expert in that standard, but at first glance it looks to me like
it makes a distinction between handles that are held or actuated in normal
use vs handles that are *continuously* held in the hand in normal use.
Similar to distinction made for surface temp limits in standards like 60950.
I may be missing something but the way I read it they provide you with two
different approaches to reducing the hazard of electric shock. One is
protective earth grounding, and the other is double insulation, or double
electrically isolated. These are mutually exclusive, being two different
How exactly does one measure "likely" as in likely to touch? Is it a %age?
Of course my question is tongue in cheek...
On Wed, Apr 5, 2023, 4:23 AM James Pawson (U3C)
wrote:
> * This message originated outside of DISH and was sent by:
> ja...@unit3compliance.co.uk *
>
Hello experts,
In running through some safety checks on a customer's product I've come
across what appears to be a conflict between two clauses. This resulted in
some head scratching! I'm sure it is my misunderstanding or misreading, but
I could do with some pointers in how to unpick this.
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