[RFI] Part 15 Class B labeling requirements

Jim P jvpoll at dallas.net
Tue Apr 19 19:14:10 EDT 2005

I just opened up a brand new 725 VA

    " APC Back-UPS ES Series "

UnintPS model number " BE725BB " and
there appears to be the required Part 15
'notice' in the manual, but only a brief mention
of part 15 on the UnintPS itself, as follows:

  "Tested to comply with FCC standards
    including Parts 15 and 68
    FCC Reg. No. 1XHUSA-25571-XP-N "

Since this heavy little beast employs a micro
that can communicate it's state to a PC via a USB
connection, that could be the driving reason this
UnintPS needed to be tested and subsequently
marked (albeit insufficiently?) with Part 15 nomen-
clature. (I'm going to leave the subject unbroached
at the moment about the criteria that mandates a
device be specifically tested or 'qualified' under FCC
Part 15.)

I've got another APC UnintPS, a 500 VA unit that
I've used for years, that I have never experienced any
harmful noise from (during standby anyway!) on the
AM BCB up through HF; as an aside I don't recall
now any markings on the 500 VA unit (it's also power-
ing this PC; I won't be disturbing it presently just to
look for Part 15 nomenclature!)

Jim P  /  WB5WPA  /

----- Original Message -----
From: "Stephanie WX3K" <wx3k at ptd.net>
To: <rfi at contesting.com>
Sent: Saturday, April 16, 2005 10:49 AM
Subject: [RFI] Part 15 Class B labeling requirements

> Isnt it true that manufacturers must include the following with their
> products so the customer sees this ?
> This device complies with part 15 of the FCC Rules. Operation is subject
to the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
> .......
>  (b) For a Class B digital device or peripheral, the instructions
furnished the user shall include the following or similar statement, placed
in a prominent location in the text of the manual:
> This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
>     * Reorient or relocate the receiving antenna.
>     * Increase the separation between the equipment and receiver.
>     * Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
>     * Consult the dealer or an experienced radio/TV technician for help
> The APC UPS I bought does NOT have this anywhere, not on the product or
> anywhere in the manual or paperwork I received with the UPS.
> --
> Stephanie WX3K
> wx3k at arrl.net
> "BPL - Broadband Over Power Line, is a dire threat to the shortwave
> radio spectrum. "
> http://www.wxpage.com/RFInterference.htm

More information about the RFI mailing list