Transcript 2014-04-10-01 TCB Council - KDB Sharing

TCB Sharing of
FCC KDBs
Michael Derby
TCB Council Chairman
9th April 2014
4/13/2015
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Introduction
Overview of the main FCC KDB types
General KDB enquiries
Proposal for improvement and
education of our industry
Examples
Feedback
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KDB Types
Main types of KDB sent from the FCC
General information sent by the FCC
• KDB 558074 for DTS, KDB 447498 for RF Exposure
Response to enquiry; specific to project
• Model XYZ does ABC; can I proceed with this result?
• FCC will reply; specific to that project
• Will include KDBs such as PBA
• Do not share these KDB responses
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KDB Types
Main types of KDB sent from the FCC
Response to enquiry; general guidance
• In general, with “X” situation; what do I do?
• Not project specific (even if you asked because of a project!)
• FCC will reply; general interpretation of their rules
• Often very useful to everyone
• This is what we’re talking about!
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General KDB Enquiries
Sent to the FCC by a TCB, Test Lab or
Manufacturer; for general guidance
Not specific to one project or model
Useful, informative guidance from the FCC
Would benefit the whole industry
• Note that if the KDB guidance is ‘restrictive’ in any
way, then it may be advantageous to share this!
This could also apply to guidance from IC
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KDB Sharing Proposal
We propose to gather these and share
Recipient sends them to the TCB Council
We e-mail to members, if appropriate
We present details at the subsequent workshop
• At the time of writing these slides, the exact format has
yet to be agreed with the FCC and Industry Canada
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Examples
Three examples of what we mean
Full KDB text not included at this time
Full KDB may be e-mailed to TCBC membership
with agreement from the FCC and the company
who submitted the KDB enquiry
• Text may be copied from original KDB to provide
anonymity in certain cases
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Limited Modular Approval
Can a module without a shield be tested in a
stand-alone configuration, for LMA?
FCC: “No”
Limited Modules must be tested in a typical host
device and/or configuration
• For a module with no shield, this would mean testing
must be performed with the module ‘inside’ the host
LMA is literally limited to a specific host or group
• Module Grantee is responsible for compliance of the
module in the final host product, not the OEM
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Non-USA Frequency Changes
Changing non-USA frequency band hardware
such as 900 MHz / 1800 MHz components
Can this be a Permissive Change because those
bands are not listed on the FCC Grant?
FCC: This requires a new FCC ID
• This cannot be a Permissive Change
Certification covers all transmitter hardware
• Changes would make it “non-identical”
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DTS Duty Cycle and 15.35
KDB 558074 for DTS states that spurious
emissions cannot apply 15.35(c) duty cycle
Can we use it for devices with fixed duty cycle?
FCC: This is an acceptable deviation
15.35(c) can be applied to maximum duty cycle
Duty cycle must be source based (hard-wired)
• Expect modification in next KDB 558074
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Useful Proposal?
What do you think?
Do you think this is useful?
Would you be happy to receive this information?
Would you be happy to send this information?
Please send information, concerns, suggestions;
and KDB replies! to the TCB Council
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Thank You
Michael Derby
TCB Council, Chairman
[email protected]
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