Transcript
Test report no. : 188582-4 Item tested : nRF2788 Wireless Microphone TX Type of equipment : SRD - 2.4GHz Transceiver Client : Nordic Semiconductor ASA
(Pre-Compliance) FCC Part 15.247 Frequency Hopping Transmitters
RSS-210, Issue 8 & RSS-Gen, Issue 3 Low Power Licence-Exempt Radio communication Devices
18 November 2011
Authorized by : .............................................. Frode Sveinsen Technical Verificator
Nemko AS, Gaustadalléen 30, P.O.Box 73 Blindern, NO-0314 Oslo Norway T +47 22 96 03 30 F +47 22 96 05 50 Enterprise number NO974404532 Visiting address: Nemko Kjeller, Instituttveien 6, P.O.Box 96, NO-2027 Kjeller Norway T +47 64 84 57 00 F +47 64 84 57 05
TEST REPORT FCC part 15.247C Project no.: 188582-4
CONTENTS 1 1.1 1.2 1.3
GENERAL INFORMATION ...................................................................................................... 3 Testhouse Info .......................................................................................................................... 3 Client Information ...................................................................................................................... 3 Manufacturer ............................................................................................................................. 3
2 2.1 2.2 2.3
Test Information ...................................................................................................................... 4 Test Item ................................................................................................................................... 4 Test Environment ...................................................................................................................... 5 Test Period................................................................................................................................ 5
3 3.1 3.2 3.3 3.4 3.5
TEST REPORT SUMMARY ..................................................................................................... 6 General ..................................................................................................................................... 6 Test Summary........................................................................................................................... 7 Description of modification for Modification Filing ..................................................................... 7 Comments ................................................................................................................................ 7 Family List Rationale ................................................................................................................ 7
4 4.1 4.2 4.3 4.4 4.5
TEST RESULTS ....................................................................................................................... 8 Channel Separation .................................................................................................................. 8 20 dB Bandwidth ..................................................................................................................... 11 Peak Power Output ................................................................................................................. 13 Spurious Emissions (Radiated) .............................................................................................. 20 Receiver Spurious Emissions (Radiated) ............................................................................... 34
5
LIST OF TEST EQUIPMENT .................................................................................................. 36
6 6.1 6.2
BLOCK DIAGRAM ................................................................................................................. 37 System set up for radiated measurements ............................................................................. 37 Test Site Radiated Emission ................................................................................................... 38
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
1
GENERAL INFORMATION
1.1
Testhouse Info
Name :
Nemko AS
Address :
Nemko Kjeller Instituttveien 6, Box 96 NO-2027 Kjeller, NORWAY
Telephone :
+47 64 84 57 00
Fax :
+47 64 84 57 05
Email:
[email protected]
FCC test firm :
994405
IC OATS :
2040D-1
Total Number of Pages: 38
1.2
Client Information
Name :
Nordic Semiconductor ASA
Address :
Otto Nielsens vei 12, N-7004 Trondheim, Norway
Telephone :
+47 72 89 89 00
Fax :
+47 72 89 89 89
Contact: Name :
Endre Rindalsholt
E-mail :
[email protected]
1.3
Manufacturer
Same as client.
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
2
Test Information
2.1
Test Item
Name :
nRF2788 – Wireless Microphone TX (Mic_Blue & Mic-Red)
Model/version :
Buildcode 1.0
Serial number :
/
Hardware identity and/or version:
nRF2788, PCB code: 0002ANOL
Software identity and/or version :
/
Frequency Range :
2404 – 2480 MHz
Tuneable Bands :
None
Number of Channels :
6
Operating Modes :
TX & RX
Type of Modulation :
GFSK, Frequency Hopping
Data rate:
4Mbps
Emissions Designator :
-
User Frequency Adjustment :
None, Software controlled
Rated Output Power :
0 dBm
Type of Power Supply :
3.0 V dc , (Primary batteries)
Antenna Connector :
Integral antenna only
Antenna Diversity Supported :
No
1
The tested equipment has integrated antennas only.
Description of Tested Device(s) The "nRF2788 - Wireless Microphone TX" unit is a part of a reference design from Nordic Semiconductor ASA; nRFready Microphone Reference Design. The nRFready Microphone Reference Design Kit is a complete hardware and software reference design for a dual 2.4 GHz RF wireless microphone set. The Kit includes two microphone boards (nRF2788) and one receiver board (nRF2789 - Wireless Microphone Dual RX). The two nRF2788 units tested are called Mic_Blue and Mic_Red in this report
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
2.2 2.2.1
Test Environment Normal test condition Temperature:
20 - 22 °C
Relative humidity:
40 - 45 %
Normal test voltage:
3.0 V DC
The values are the limit registered during the test period.
2.3
Test Period
Item received date:
2011-10-03
Test period :
from 2011-10-03
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
3
TEST REPORT SUMMARY
3.1
General
Manufacturer:
Nordic Semiconductor ASA
Model No.:
nRF2788
Serial No.:
-
All measurements are traceable to national standards. The tests were conducted for the purpose of demonstrating compliance with FCC CFR 47 Part 15.247. Radiated tests were conducted in accordance with ANSI C63.4-2009 and ANSI C63.10-2009. The radiated tests were made in a semi-anechoic chamber at measuring distances of 3 and 10 meters.
New Submission
Production Unit
Class II Permissive Change
Pre-production Unit
DSS
Equipment Code
Family Listing
THIS TEST REPORT RELATES ONLY TO THE ITEM (S) TESTED. Deviations from, additions to, or exclusions from the test specifications are described in “Summary of Test Data”.
TEST REPORT #: 188582-4
TESTED BY:
DATE: 2011-10-10 G.Suhanthakumar, Test engineer
Nemko AS authorizes the above named company to reproduce this report provided it is reproduced in its entirety and for use by the company’s employees only. Any reproduction of parts of this report requires approval in writing from Nemko AS. Any use which a third party makes of this report, or any reliance on or decisions to be made based on it, are the responsibility of such third parties. Nemko AS accepts no responsibility for damages suffered by any third party as a result of decisions made or actions based on this report. This test report applies only to the items and configurations tested.
Nemko AS, NO-2027 Kjeller
Page 6 (38)
TEST REPORT FCC part 15.247C Project no.: 188582-4
3.2
Test Summary
Name of test
FCC Part 15 reference
RSS-210 Issue 8 reference
Result
Supply Voltage Variations
15.31(e)
8 (RSS-GEN)
N/T
Number of Operating Frequencies
15.31(m)
A8.1
Complies
Antenna Requirement
15.203
7.1.4 (RSS-GEN)
N/A
1
Power Line Conducted Emission
15.107(a) 15.207(a)
7.2.2 (RSS-GEN)
N/A
2
Channel Separation
15.247(a)(1)
A8.1
-
Pseudorandom Hopping Algorithm
15.247(a)(1)
A8.1
N/T
Time of Occupancy
15.247(a)(1)(iii)
A8.1
N/T
Occupied Bandwidth
15.247(a)(1)
A8.1
N/T
Minimum 20 dB Bandwidth
15.247(a)(2)
A8.2
-
Peak Power Output
15.247(b)
A8.4
Complies
Spurious Emissions (Antenna Conducted)
15.247(c)
A8.5
N/A
Spurious Emissions (Radiated)
15.247(c) 15.109(a) 15.209(a)
A8.5
Complies
1
The tested equipment has integrated antennas only.
2
The power is taken from battery .
3.3
1
Description of modification for Modification Filing
Not applicable.
3.4
Comments
The nRF2788 is tested only for output power and spurious emissions. The radiated measurements are performed keeping the nRF2789 unit behind the measuring antenna to establish communication between EUT(nRF2788) and nRF2789. The radiated measurements are tested on three axis.
3.5
Family List Rationale
Not Applicable.
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
4 4.1
TEST RESULTS Channel Separation
Para. No.: 15.247 (a)(1)
Test Performed By: G.Suhanthakumar
Test Results:
Complies
Measurement Data:
Channel Separation:
Date of Test: 03-oct-11
6.02 MHz
20 dB Bandwidth of hopping channel: 2.48 MHz
RF channel has no influence on 20 dB bandwidth.
See attached graph
Channel Separation nominal value: 55MHz/9= 6.12 MHz.
Requirement: Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hopping channel, whichever is greater. or: Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or two-thirds of the 20 dB bandwidth of the hopping channel, whichever is greater, provided the system operates with an output power no greater than 125 mW. No requirements for Digital Transmission Systems.
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
No of channels 6
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
Channel separation 6 MHz
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
4.2
20 dB Bandwidth
Para. No.: RSS-Gen
Test Performed By: G.Suhanthakumar
Date of Test: 03-Oct-2011
Measurement Data: 20 dB Bandwidth (MHz) Ch 04
Ch 40
Ch 80
2404MHz
2440MHz
2480MHz
Mic_Blue 3.16
N/T
N/T
Mic_Red N/T
N/T
N/T
Requirements: For information only.
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
Mic_Blue: Ch04 – 20 dB bandwidth – 3.61MHz
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
4.3
Peak Power Output
Para. No.: 15.247 (b) Test Performed By: G.Suhanthakumar
Date of Test: 03-oct-2011
Test Results: Complies
Measurement Data: Maximum Field strength Mic_Blue RF channel
Ch 04
Ch 40
Ch 80
HP: Measured value (dBµV/m)
86.43
90.02
88.17
VP: Measured value (dBµV/m)
89.14
87.74
88.47
Ch 04
Ch 40
Ch 80
VP: Measured value (dBµV/m)
-
-
-
HP: Measured value (dBµV/m)
-
-
-
Mic_Red RF channel
Detachable antenna?
Yes
No
If detachable, is the antenna connector non-standard?
Yes
No
Integral antenna only
Requirements: The maximum peak output power shall not exceed the following limits: For frequency hopping systems employing at least 75 hopping channels: 1 Watt For all other frequency hopping systems in the 2400 - 2483.5 MHz band: 0.125 Watts For Digital Transmission Systems in the 2400 - 2483.5 MHz band: 1 Watt If transmitting antennas of directional gain greater than 6 dBi are used, the peak output power from the intentional radiator shall be reduced below the stated value above by the amount in dB that the directional gain of the antenna exceeds 6 dBi.
Nemko AS, NO-2027 Kjeller
Page 13 (38)
TEST REPORT FCC part 15.247C Project no.: 188582-4
Mic_Blue: HP: Ch04 – Field strength
Nemko AS, NO-2027 Kjeller
Page 14 (38)
TEST REPORT FCC part 15.247C Project no.: 188582-4
Mic_Blue: VP: Ch04 – Field strength
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
Mic_Blue: HP: Ch40 – Field strength
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
Mic_Blue: VP: Ch40 – Field strength
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
Mic_Blue: HP: Ch80 – Field strength
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
Mic_Blue: VP: Ch80 – Field strength
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
4.4
Spurious Emissions (Radiated)
Para. No.: 15.247 (c)
Test Performed By: G.Suhanthakumar
Date of Test: 03.oct.2011
Test Results: Complies Measurement Data: Lower Band-edge radiated measurements Frequency
Power below nearest channel, dB
GHz
RF ch 04
2.39
FHSS
52.59
Limit
Margin
dB
dB
-20
32.59
Lower channel starts at 2.404 GHz and 20 dB channel bandwidth is 2.4MHz Band-edge field strength 2.39 GHz: Marker Delta 100kHz RBW: 52.59 Peak Field Strength : 89.12 – 52.59 = 36.53 dBµV/m
Upper Band-edge radiated measurements Frequency
Power below nearest channel, dB
GHz
RF ch 80
2.4835
FHSS
43.11
Limit
Margin
dB
dB
-20
23.11
Band-edge field strength 2.4835 GHz: Marker Delta 100kHz RBW: 43.11 dB Peak Field Strength: 88.34– 43.11 = 45,23 dBµV/m
100% duty cycle
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
Ch04: Lower band edge – Delta marker
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
Ch80 – Upper-band-edge – Delta-Marker
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
Duty Cycle Calculation: RF duty cycle: Calculation according to RF burst Para 15.35 (c) According to manufacturer the maximum duty cycle correction is 10.4dB
Manufacturer statement : The microphone sends for 570us on one arbitrary channel and it waits about 2430us before it moves to another channel. Then it will transmits on 5 channels before it comes back to the first channel. It takes about 3000us*5. This means the total time for each is 570us/(570us+2430us+3000us*5)=570us/(3000us*6) Duty Cycle Correction Factor = 20 log(570us/(3000us*6)) = -30dB
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
Radiated Emissions with antenna, 1-25 GHz, peak 1-18 GHz measured at a distance of 3m, 18-25 GHz measured at 1m.
Measured with Peak Detector Frequency
RF channel
Dist. corr. factor
Field strength, Peak, 3m
Duty cycle corr. factor
Limit
Margin
GHz
04-80
dB
dBµ µV/m
dB
dBµ µV/m
dB
4.81
04
0
60.86
-
74
13.14
4.88
40
0
-
-
74
-
4.95
80
0
-
-
74
-
9.61
40
0
56.64
-
74
17.36
10 - 25
04,40,80
0
None detected
-
-
-
Radiated emissions with antenna,1- 25 GHz, Average Measured with Average Detector Frequency
RF channel
Dist. corr. factor
Field strength, Peak, 3m
Duty Cycle correction factor
Limit
Margin
GHz
04-80
dB
dBµ µV/m
dB
dBµ µV/m
dB
4.81
04
0
58.41
>
54
>
4.88
40
0
-
>
54
>
4.95
80
0
-
>
54
>
9.61
40
0
52.04
>
10 - 25
04,40,80
0
None detected
-
-
-
Measured with continuous transmission (100% duty cycle) The maximum is observed in vertical polarization Antenna factor, amplifier gain and cable loss are included in spectrum analyzer “Transducer factor”.
Nemko AS, NO-2027 Kjeller
Page 24 (38)
TEST REPORT FCC part 15.247C Project no.: 188582-4
nd
Mic_Blue : VP, Ch04 – 2
Nemko AS, NO-2027 Kjeller
harmonic- AV detector
Page 25 (38)
TEST REPORT FCC part 15.247C Project no.: 188582-4
nd
Mic_Blue :VP, Ch04 – 2
Nemko AS, NO-2027 Kjeller
harmonic- PK detector
Page 26 (38)
TEST REPORT FCC part 15.247C Project no.: 188582-4
Mic_Blue :VP, Ch04 – 4th harmonic- AV detector
Nemko AS, NO-2027 Kjeller
Page 27 (38)
TEST REPORT FCC part 15.247C Project no.: 188582-4
th
Mic_Blue :VP, Ch04 – 4
Nemko AS, NO-2027 Kjeller
harmonic- PK detector
Page 28 (38)
TEST REPORT FCC part 15.247C Project no.: 188582-4
Mic_Blue: ch40, Pre-view scan VP: 1 – 15GHz
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
Radiated emissions 9kHz - 30 MHz. Detector: Peak Measuring distance 10 m.
Frequency
Operational condition
kHz 35.6
TX on
Nemko AS, NO-2027 Kjeller
Field strength
Measuring distance
Limit
Margin
FCC15.209
dBµ µV/m
m
dBµ µV/m
dB
22.6
10
48.6
26.0
Page 30 (38)
TEST REPORT FCC part 15.247C Project no.: 188582-4
Att 10 dB dBµV /m
100 kHz
110
RBW 200 Hz MT 30 ms PREAMP ON 1 MHz
Marker 1 [T1 ] 20.60 dBµV/m 35.600000000 kHz 10 MHz
FCC9KHZ 100
1 PK CLRWR
90
80
TDF
70
60
50
6DB AC
40
30
1 20
10 0
10 kHz
Date: 3.OCT.2011
30 MHz
16:05:55
Both units were active (Mic blue & Mic Red):Longitudinal - 9kHz - 30MHz
Nemko AS, NO-2027 Kjeller
Page 31 (38)
TEST REPORT FCC part 15.247C Project no.: 188582-4
Att 10 dB dBµV /m
100 kHz
110
RBW 200 Hz MT 30 ms PREAMP ON 1 MHz
Marker 1 [T1 ] 22.60 dBµV/m 35.600000000 kHz 10 MHz
FCC9KHZ 100
1 PK CLRWR
90
80
TDF
70
60
50
6DB AC
40
30
1 20
10 0
10 kHz
30 MHz
Date: 3.OCT.2011
16:00:38
Both units were active (Mic blue & Mic Red):Transvers 9kHz – 30MHz
Nemko AS, NO-2027 Kjeller
Page 32 (38)
TEST REPORT FCC part 15.247C Project no.: 188582-4
Radiated emissions 30 – 1000 MHz. Detector: Quasi-Peak Measuring distance 3 m. Not Tested.
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
4.5
Receiver Spurious Emissions (Radiated)
Para. No.: RSS-Gen (6)
Test Performed By: G.Suhanthakumar
Date of Test: 03.10.2011
Test Results: Complies Measurement Data: Radiated Emissions with antenna, 1 - 25 GHz, Peak Measured at 3m
Measured with Peak Detector Frequency
RF channel
Dist. corr. factor
Field strength, Peak Det, @3m
Duty cycle corr. factor
Limit
Margin
GHz
04-80
dB
dBµ µV/m
dB
dBµ µV/m
dB
2.754
04
0
NT
-
54
-
2.795
40
0
40.81
-
54
13.19
2.841
80
0
NT
-
54
-
0.030 – 0.088
40
0
NT
-
40
0.088 – 0.216
40
0
NT
-
43
-
0.216 – 0.960
40
0
NT
-
46
-
5 – 25
40
0
-
-
54
-
-
The only detected spurious radiation is VCO leakage from the receiver, this is only a CW signal
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
Mic_Blue HP: VCO leakage- Ch40
Nemko AS, NO-2027 Kjeller
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TEST REPORT FCC part 15.247C Project no.: 188582-4
5
LIST OF TEST EQUIPMENT
To facilitate inclusion on each page of the test equipment used for related tests, each item of test equipment and ancillaries are identified (numbered) by the Test Laboratory. No.
Model number
Description
Manufacturer
Ref. no.
Cal. date
Cal. Due
1.
FSU26
Spectrum Analyzer
Rohde & Schwarz
LR 1504
04.11.2010
04.11.2011
2.
ESCI
EMI Receiver
Rohde & Schwarz
N 4259
09.09.2010
30.11.2011
3.
FSEK 1088,3494,30
Spectrum Analyzer
R&S
1337
15.12.2010
15.12.2011
4.
U2000A
USB power meter
Agilent Technology
LR 1523
15.01.2011
15.01.2012
5.
3115
Antenna horn
EMCO
LR 1330
05.08.2010
05.08.2013
6.
643
Antenna horn
Narda
LR 093
26.01.2009
26.01.2012
7.
642
Antenna horn
Narda
LR 220
26.01.2009
26.01.2012
8.
PM7320X
Antenna horn
Sivers lab
LR 103
26.01.2009
26.01.2012
9.
DBF-520-20
Antenna horn
Systron Donner
LR 101
26.01.2009
10.
638
Antenna horn
Narda
LR 098
26.01.2009
11.
Sucoflex 102E
Cable microwave
Suhner
LR 1370
-
-
12.
6032A
Power supply
HP
LR 1062
-
-
13.
77
Multimeter, Digital
Fluke
LR155
03.11.2010
03.11.2011
14.
8449B
Amplifier
Hewlett Packard
LR 1322
26.09.2011
26.09.2012
15.
HFH2-Z2
Antenna loop
Rohde and Schwarz
LR 285
08.10.2010
08.10.2013
16.
10855A
Amplifier
Hewlett Packard
LR 1445
12.10.2011
02.10.2012
17.
HL223
Antenna log.per
Rohde & Schwarz
LR 1261
19.05.2010
09.05.2013
18.
HK116
Antenna biconic
Rohde & Schwarz
LR 1260
19.05.2010
09.05.2013
19.
ESN
Test Receiver
Rohde & Schwarz
LR 1237
21.10.2011
21.10.2012
20.
ESH3-Z3
LISN
Rohde & Schwarz
LR 1076
04.11.2011
04.11.2012
21.
B32-10R
Power supply
Oltronix
LR 126
-
-
22.
ESHS 30
EMI Receiver
Rohde & Schwarz
N-3529
04.08.2011
04.08.2012
23.
ESH3-Z2
Pulse Limiter
Rohde & Schwarz
LR 1074
03.03.2010
03.03.2012
Nemko AS, NO-2027 Kjeller
26.01.2012 26.01.2012
Page 36 (38)
TEST REPORT FCC part 15.247C Project no.: 188582-4
6 6.1
BLOCK DIAGRAM System set up for radiated measurements
nRF2788 (EUT)
Battery
Test equipment: 1, 2, 3, 6, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18
Nemko AS, NO-2027 Kjeller
Page 37 (38)
TEST REPORT FCC part 15.247C Project no.: 188582-4
6.2
Test Site Radiated Emission
Anechoic Chamber
Antenna H = 1-4 m EUT Non-conducting support on Turntable, H = 0.8m
Ground Plane
Test Receiver
Shielded Room
Nemko AS, NO-2027 Kjeller
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