Slide 0 - ACBcert.com
Download
Report
Transcript Slide 0 - ACBcert.com
Testing Newly-Approved Technologies:
Challenges and Solutions
Mitchell Lazarus
703-812-0440 | [email protected]
April 10, 2014
Innovator’s Tasks
1. Invent device
2. Obtain FCC waiver or rule change
can entail substantial delay:
technical waiver takes about 2 years
technical rulemaking takes 2-5 years
3. Obtain FCC certification
can take several more months.
1
Delays Due to Testing
New technologies may require new compliance test procedures
Even after FCC settles on procedures:
FCC may want to try out procedures
labs and TCBs will consult with FCC on how procedures work
client may have last-minute design issues, e.g.:
needed test modes missing from device software
problems with out-of-band emissions
commercial labs may have to acquire equipment, train personnel
testing takes longer than for established technologies.
2
Consequences of Delay
technology becomes outdated
investors pull out
customers go elsewhere
key employees leave
businesses fail
people die.
3
Rulemakings for New Technologies
Outcomes apply to everyone
Legal processes are uniform
set by Administrative Procedure Act
public comment (nearly) always required
Test procedures usually considered along with technical rules
often topic of public comment
sometimes topic of vigorous dispute
Rulemaking examples …
4
Level Probing Radars – 1
Measure quantity of materials, liquid depth outdoors
wideband operation
traditional rules set limit on transmitted (downward) emissions
interference arises from scattered (horizontal) emissions
• difficult to measure reliably.
5
Level Probing Radars – 2
New rules require boresight
measurement
seeking max. horizontal
emissions of –41.3 dBm
boresight emissions limits
exceed that level by 22–38
dB, depending on band
allows for losses due to scattering, etc.
Authorized in three bands: 5.925–7.25, 24.05–29,75–85 GHz
Rules took effect April 7
FCC lab issued detailed draft KDB.
6
Broadband over Power Line – 1
Communications over power distribution lines at 1.7-80 MHz
regulated devices: couplers take signal off line, feed to premises
typically one coupler per 3-8 houses
only one coupler per several blocks works at one time
Compliance testing inherently difficult
FCC requires testing in situ: low signal, high noise
Detailed testing guidance in Report & Order
FCC engineers worked at manufacturers’ prototype houses.
7
Broadband over Power Line – 2
Amateur radio licensees and ARRL filed 6,000+ oppositions:
claimed power lines act as city-sized antennas
BPL providers argued that couplers act as isolated point sources
agreed to rules that turn down or turn off couplers that cause
interference
Timetable:
2003-04-28 Notice of Inquiry
2004-02-23 NPRM
2004-10-28 Report and Order (18 months after NOI)
2006-08-07 Order on Reconsideration
2006-08-28 first certification (22 months after R&O).
8
Broadband over Power Line – 3
Dispute throughout proceeding over extrapolation factor:
Frequency
< 30 MHz
> 30 MHz
Distance
30 Meters
10 Meters
40 dB/decade
20 dB/decade
Point source
(1/r²)
Line source
(1/r)
Extrapolation
Implication
Amateur radio interests favored 20 dB/decade at all frequencies
challenged 40 dB/decade in U.S. Court of Appeals
court sent back to FCC for second look
FCC reaffirmed.
9
Ultra-Wideband
Authorized low-emission signals over very wide bandwidth
eight types of devices; each has different rules
max emissions for any device in any band: –41.3 dBm/MHz
lower in some bands
Testing challenges
Class B digital emissions can exceed intentional emissions
FCC specified procedures to isolate digital emissions
GPS band emissions as low as –85.3 dBm
Timetable:
1998-09-01 Notice of Inquiry
2000-05-11 Notice of Proposed Rulemaking
2002-04-22 First Report and Order (44 months after NOI)
2002-09-12 first certification (5 months after R&O).
10
TV Band (“White Space”) Devices
Downside risk: interference to broadcast TV, other services
FCC proceeded with great caution:
multiple successive rule modifications
live field tests in multiple kinds of environments
highly detailed test procedures
initial roll-outs limited to small areas
live, public testing of candidate database managers
Timetable:
Dec. 2002: proceeding began
Dec. 2012: first large-scale roll-out (after 10 years)
so far only fixed devices have been certified.
11
Waivers for New Technologies
Process driven by waiver proponent
no required procedure; can vary
FCC usually seeks public comment
waiver initially applies only to company that asked for it
central issue is usually technical rules
FCC may not look at compliance testing until prompted by client
(or TCB)
Examples …
12
Surveillance Robot – 1
Police surveillance robot
steered by remote control
transmits analog video back to
controller
manufacturer sought 430-448
MHz (federal radar & amateur)
dozens of police departments
wrote to the FCC in support
amateurs strongly opposed
FCC authorized.
13
Surveillance Robot – 2
Timetable:
2008-01-11 waiver requested
2010-02-23 waiver granted (25 months after request)
2010-04-22 certification granted (two months after waiver)
2012-02-06 first licenses granted (21 months after certification)
Licensing delay due in part to challenges to certification …
14
Surveillance Robot – 3
First model had B/W video, no sound
measured bandwidth per required procedure: 100 kHz
Opponents: analog video is “inevitably on the order of 5.75 MHz”
demanded that certification be set aside
FCC retained certification, granted licenses (after delay).
15
Airport Body Scanners – 1
Uses fast sweep 24.25–30 GHz
sweep takes 5.2 microseconds
• (pauses for 2.6 microseconds)
sweep repeats twice for each of 192
antennas on vertical mast
mast sequence repeats for each of 210
rotating mast positions
complete scan uses 80,640 sweeps
takes less than 2 seconds (including
mast rotation)
software processes reflections into
image.
16
Airport Body Scanners – 2
Compliance issues:
Sec. 15.31(c) requires measurement with sweep stopped
Sec. 15.35(b) sets 20 dB peak-to-average limit
FCC waived both rules.
17
Airport Body Scanners – 3
Timetable:
2004-08-18 waiver requested
2006-08-04 waiver granted (24 months after request)
2006-08-22 certification granted (18 days after waiver)
FCC allowed certification process to begin while waiver was pending
FCC conducted tests at Columbia lab
waiver order had detailed guidance on testing.
18
Conclusion
Delays are reduced when rulemaking or waiver order has clear
guidance on testing
How labs and TCBs can help innovators:
if asked, become involved early
deal with the right person at the client (not the lawyer)
the client may not know what services they need; tell them
and may not know what information you need; ask them
be creative on test procedures
if guidance is needed, go to the FCC promptly
for novel questions, KDB may not be the best place to start
but if rules and procedures are clear, do not ask the FCC
Time is always critical.
19
Questions?
Mitchell Lazarus
703-812-0440 | [email protected]
20