TEST REPORT

FCC ID: SK9C3A-1L

Test Report

Download: PDF

FCCID_640371

Table of Contents
1.0 General 3
1.1 Purpose 3
1.2 Product Description 3
1.2.1 General 3
1.2.2 Manufacturer 3
2.0 Test Facilities 3
2.1 Location 3
2.2 Laboratory Accreditations/Recognitions/Certifications 3
2.3 Radiated Emissions Test Site Description 4
2.3.1 Semi-Anechoic Chamber Test Site 4
2.3.2 Open Area Tests Site (OATS) 5
2.4 Conducted Emissions Test Site Description 6
3.0 Applicable Standards and References 6
4.0 List of Test Equipment 7
5.0 Support Equipment 8
6.0 EUT Setup Block Diagram 8
7.0 Summary of Tests 9
7.1 Section 15.203 - Antenna Requirement 9
7.2 Section 15.207 - Power Line Conducted Emissions 9
7.2.1 Test Methodology 9
7.2.2 Test Results 9
7.3 Section 15.109 - Radiated Emissions (Unintentional Radiation) 17
7.3.1 Test Methodology 17
7.3.2 Test Results 17
7.4 Section 15.247(b) – Peak Output Power 18
7.4.1 Test Methodology 18
7.4.2 Test Results 18
7.5 Section 15.247(a) – Channel Usage 19
7.5.1 Section 15.247(a) (1) - Carrier Frequency Separation 20
7.5.1.1 Test Methodology 20
7.5.1.2 Test Results 20
7.5.2 Section 15.247(a) (1) – Number of Hopping Channels 20
7.5.3 Section 15.247(a) (1) – Channel Dwell Time 21
7.5.4 Section 15.247(a) (1) (iii) – 20dB Bandwidth 22
7.5.4.1 Test Methodology 22
7.5.4.2 Test Results 22
7.6 Section 15.247(c) – Band-edge Compliance and Spurious Emissions 24
7.6.1 Band-edge Compliance of RF Conducted Emissions 24
7.6.1.1 Test Methodology 24
7.6.1.2 Test Results 24
7.6.2 RF Conducted Spurious Emissions 25
7.6.2.1 Test Methodology 25
7.6.2.2 Test Results 25
7.6.3 Radiated Spurious Emissions (Restricted Bands) 27
7.6.3.1 Test Methodology 27
7.6.3.2 Duty Cycle Correction 28
7.6.3.3 Test Results 28
7.6.3.4 Sample Calculations

8.0 CONCLUSION 29

Additional Exhibits Included In Filing

Internal Photographs Installation/Users Guide
External Photographs Theory of Operation
Test Setup Photographs BOM (Parts List)
Product Labeling System Block Diagram
RF Exposure – MPE Calculations
Schematics

5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598

Model: C3A1L FCC ID: SK9C3A-1L

2.3 Radiated Emissions Test Site Description

2.3.1 Semi-Anechoic Chamber Test Site
The Semi-Anechoic Chamber Test Site consists of a 20’ x 30’ x 18’ shielded enclosure. The
chamber is lined with Toyo Ferrite Grid Absorber, model number FFG-1000. The ferrite tile grid
is 101 x 101 x 19mm thick and weighs approximately 550 grams. These tiles are mounted on
steel panels and installed directly on the inner walls of the chamber.

The turntable is 150cm in diameter and is located 160cm from the back wall of the chamber. The
chamber is grounded via 1 - 8’ copper ground rod, installed at the center of the back wall, it is
bound to the ground plane using 3/4" stainless steel braided cable.

The turntable is all steel, flush mounted table installed in an all steel frame. The table is remotely
operated from inside the control room located 25’ from the range. The turntable is electrically
bonded to the surrounding ground plane via steel fingers installed on the edge of the turn table.
The steel fingers make constant contact with the ground plane during operation.

Behind the turntable is a 3’ x 6’ x 4’ deep shielded pit used for support equipment if necessary.
The pit is equipped with 1 - 4” PVC chases from the turntable to the pit that allow for cabling to
the EUT if necessary. The underside of the turntable can be accessed from the pit so cables can
be supplied to the EUT from the pit.

A diagram of the Semi-Anechoic Chamber Test Site is shown in Figure 2.3-1 below:

3 Meters

5 Feet
Diamete
r

20 Feet

30 Feet

Figure 2.3-1: Semi-Anechoic Chamber Test Site

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 4

Model: C3A1L FCC ID: SK9C3A-1L

2.3.2 Open Area Tests Site (OATS)
The open area test site consists of a 40’ x 66’ concrete pad covered with a perforated electro-
plated galvanized sheet metal. The perforations in the sheet metal are 1/8” holes that are
staggered every 3/16”. The individual sheets are placed to overlap each other by 1/4” and are
riveted together to provide a continuous seam. Rivets are spaced every 3” in a 3 x 20 meter
perimeter around the antenna mast and EUT area. Rivets in the remaining area are spaced as
necessary to properly secure the ground plane and maintain the electrical continuity.

The entire ground plane extends 12’ beyond the turntable edge and 16’ beyond the antenna mast
when set to a 10 meter measurement distance. The ground plane is grounded via 4 - 8’ copper
ground rods, each installed at a corner of the ground plane and bound to the ground plane using
3/4" stainless steel braided cable.

The turntable is an all aluminum 10’ flush mounted table installed in an all aluminum frame. The
table is remotely operated from inside the control room located 40’ from the range. The turntable
is electrically bonded to the surrounding ground plane via steel fingers installed on the edge of
the turn table. The steel fingers make constant contact with the ground plane during operation.

Adjacent to the turntable is a 7’ x 7’ square and 4’ deep concrete pit used for support equipment if
necessary. The pit is equipped with 5 - 4” PVC chases from the pit to the control room that allow
for cabling to the EUT if necessary. The underside of the turntable can be accessed from the pit
so cables can be supplied to the EUT from the pit. The pit is covered with 2 sheets of 1/4"
diamond style re-enforced steel sheets. The sheets are painted to match the perforated steel
ground plane; however the underside edges have been masked off to maintain the electrical
continuity of the ground plane. All reflecting objects are located outside of the ellipse defined in
ANSI C63.4.

A diagram of the Open Area Test Site is shown in Figure 2.3-2 below:

10

3 Meters

40

7x7x4
Pit

66 Feet

Figure 2.3-2: Open Area Test Site

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 5

Model: C3A1L FCC ID: SK9C3A-1L

2.4 Conducted Emissions Test Site Description
The AC mains conducted EMI site is a shielded room with the following dimensions:

¾ Height: 3.0 Meters
¾ Width: 3.6 Meters
¾ Length: 4.9 Meters

The room is manufactured by Rayproof Corporation and installed by Panashield, Inc. Earth ground is
provided to the room via an 8’ copper ground rod. Each panel of the room is connected electrically at
intervals of 4”.

Power to the room is filtered to prevent ambient noise from coupling to the EUT and measurement
equipment. Filters are models 1B42-60P manufactured by Rayproof Corporation.

The room is of sufficient size to test table top and floor standing equipment in accordance with
section 6.1.4 of ANSI C63.4.

A diagram of the room is shown below in figure 2.4-1:

Non-EUT LISN

4.9 Meters

0.4 Meters

1.0 Meter

3.0 Meters

1.5 Meters

0.8 Meters

EUT LISN

Figure 2.4-1: AC Mains Conducted EMI Site

3.0 APPLICABLE STANDARD REFERENCES
The following standards were used:

ANSI C63.4-2003: Method of Measurements of Radio-Noise Emissions from Low-Voltage
Electrical and Electronic Equipment in the 9KHz to 40GHz
US Code of Federal Regulations (CFR): Title 47, Part 2, Subpart J: Equipment Authorization
Procedures
US Code of Federal Regulations (CFR): Title 47, Part 15, Subpart C: Radio Frequency Devices,
Intentional Radiators
FCC OET Bulletin 65 Appendix C - Evaluating Compliance with FCC Guidelines for Human
Exposure to Radiofrequency Electromagnetic Fields
ACS Report: 06-0013-15C Advanced Compliance Solutions Page 6

Model: C3A1L FCC ID: SK9C3A-1L

5.0 SUPPORT EQUIPMENT

Table 5-3: Support Equipment
Manufacturer Equipment Type Model Number Serial Number FCC ID

EUT Was Self Supporting

6.0 EQUIPMENT UNDER TEST SETUP BLOCK DIAGRAM

Spectrum Analyzer

Connection to a
Spectrum Analyzer used
for conducted
measurements only

120/240/480 VAC 120/240/480 VAC
Configuration 1 Configuration 2

Figure 6-1: EUT Test Setup

Configuration 1: Used for radiated emissions and AC power line conducted emissions.
Configuration 2: Used for RF conducted measurements. The EUT was configured with a 50 Ohm
temporary RF output port for conducted measurements to facilitate a direct connection to a spectrum
analyzer.

Note: The radio module can be installed in 120-480V auto ranging meter base, 120V meter base, or
240V meter base. Testing performed on all meter bases for AC power line conducted emissions
and radiated emissions.

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 8

Model: C3A1L FCC ID: SK9C3A-1L

7.0 SUMMARY OF TESTS
Along with the tabular data shown below, plots were taken of all signals deemed important enough to
document.

7.1 Antenna Requirement - FCC Section 15.203
The IMAGE circuit board uses a slot antenna design. The slot is set in length for the quarter wavelength
of 915 MHz which can not be altered without destroying the device. This device meets the requirements
of CFR 47 Part 15.203. The antenna gain is 3.5dBi.

7.2 Power Line Conducted Emissions - FCC Section 15.207

7.2.1 Test Methodology
ANSI C63.4 sections 6 and 7 were the guiding documents for this evaluation. Conducted emissions were
performed from 150kHz to 30MHz with the spectrum analyzer’s resolution bandwidth set to 9kHz and the
video bandwidth set to 30kHz. The calculation for the conducted emissions is as follows:

Corrected Reading = Analyzer Reading + LISN Loss + Cable Loss
Margin = Applicable Limit - Corrected Reading

7.2.2 Test Results
Results of the test are shown below in and Tables 7.2-1 through 7.2-16 and Figure 7.2-1 through 7.2-8.
The Polyphase meter base is auto ranging from 120VAC to 480VAC therefore data was collected at both
voltage extremes to show compliance.

120V Monophase Configuration:

Table 7.2-1: Line 1 Conducted EMI Results (Quasi-Peak)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.246 43.6 9.7 61.8 18.2 L1 GND
0.396 25.0 9.7 57.9 32.8 L1 GND
0.492 43.9 9.7 56.1 12.2 L1 GND
0.738 50.7 9.7 56.0 5.2 L1 GND
0.978 35.0 9.7 56.0 20.9 L1 GND
1.224 31.8 9.7 56.0 24.1 L1 GND
1.470 29.9 9.7 56.0 26.0 L1 GND
1.962 22.4 9.7 56.0 33.5 L1 GND
4.194 21.6 9.6 56.0 34.3 L1 GND

Table 7.2-2: Line 1 Conducted EMI Results (Average)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.246 35.2 9.7 51.8 16.6 L1 GND
0.378 14.4 9.7 48.3 33.9 L1 GND
0.492 36.1 9.7 46.1 9.9 L1 GND
0.738 35.4 9.7 46.0 10.5 L1 GND
0.978 27.9 9.7 46.0 18.0 L1 GND
1.224 27.0 9.7 46.0 18.9 L1 GND
1.470 24.6 9.7 46.0 21.3 L1 GND
1.962 18.5 9.7 46.0 27.4 L1 GND
4.194 21.0 9.6 46.0 24.9 L1 GND

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 9

Model: C3A1L FCC ID: SK9C3A-1L

Table 7.2-3: Line 2 Conducted EMI Results (Quasi-Peak)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.246 50.0 9.7 61.8 11.8 L2 GND
0.462 29.5 9.7 56.6 27.1 L2 GND
0.492 44.6 9.7 56.1 11.4 L2 GND
0.732 49.7 9.7 56.0 6.2 L2 GND
0.978 36.9 9.7 56.0 19.0 L2 GND
1.218 30.6 9.7 56.0 25.4 L2 GND
1.230 23.8 9.7 56.0 32.1 L2 GND
1.464 30.6 9.7 56.0 25.4 L2 GND
1.956 26.3 9.7 56.0 29.6 L2 GND
4.194 21.8 9.6 56.0 34.1 L2 GND

Table 7.2-4: Line 2 Conducted EMI Results (Average)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.246 36.0 9.7 51.8 15.8 L2 GND
0.408 14.1 9.7 47.6 33.5 L2 GND
0.492 34.6 9.7 46.1 11.5 L2 GND
0.732 38.1 9.7 46.0 7.8 L2 GND
0.978 29.2 9.7 46.0 16.7 L2 GND
1.218 26.4 9.7 46.0 19.5 L2 GND
1.230 14.1 9.7 46.0 31.8 L2 GND
1.464 27.4 9.7 46.0 18.6 L2 GND
1.956 23.8 9.7 46.0 22.1 L2 GND
4.194 21.1 9.6 46.0 24.8 L2 GND

Level [dBµV]
80

70

60

50 x

x x
40
+ + + x
x
30 x
+ +
x +
x x+
20 +
+
10

0
150k 300k 500k 1M 2M 3M 5M 7M 10M 30M
Frequency [Hz]

x MES 06-0013CE01_fin QP
+ MES 06-0013CE01_fin AV
MES 06-0013CE01_pre PK
LIM FCC QP Class B
LIM FCC AV Class B

Figure 7.2-1: Conducted Emissions Graph – Line 1

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 10

Model: C3A1L FCC ID: SK9C3A-1L

Level [dBµV]
80

70

60

50 x x
x
40
+ x
+ +
30 x + x x
+ + x
x +
x
+
20
+ +
10

0
150k 300k 500k 1M 2M 3M 5M 7M 10M 30M
Frequency [Hz]

x MES 06-0013CE02_fin QP
+ MES 06-0013CE02_fin AV
MES 06-0013CE02_pre PK
LIM FCC QP Class B
LIM FCC AV Class B

Figure 7.2-2: Conducted Emissions Graph – Line 2

240V Monophase Configuration:

Table 7.2-5: Line 1 Conducted EMI Results (Quasi-Peak)

Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.252 40.6 9.7 61.6 21.0 L1 GND
0.330 32.0 9.7 59.4 27.3 L1 GND
0.498 34.7 9.7 56.0 21.2 L1 GND
0.588 29.9 9.7 56.0 26.0 L1 GND
0.750 32.8 9.7 56.0 23.1 L1 GND
1.458 24.0 9.7 56.0 31.9 L1 GND
1.806 24.0 9.7 56.0 31.9 L1 GND
4.194 30.5 9.6 56.0 25.4 L1 GND
16.776 30.1 9.3 60.0 29.8 L1 GND
25.164 32.2 8.8 60.0 27.7 L1 GND

Table 7.2-6: Line 1 Conducted EMI Results (Average)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.246 33.9 9.7 51.8 17.9 L1 GND
0.330 26.9 9.7 49.4 22.4 L1 GND
0.492 31.3 9.7 46.1 14.8 L1 GND
0.576 23.4 9.7 46.0 22.5 L1 GND
0.738 26.6 9.7 46.0 19.3 L1 GND
1.458 20.6 9.7 46.0 25.3 L1 GND
1.800 19.6 9.7 46.0 26.3 L1 GND
4.194 30.4 9.6 46.0 15.5 L1 GND
16.776 30.1 9.3 50.0 19.9 L1 GND
25.164 32.2 8.8 50.0 17.7 L1 GND

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 11

Model: C3A1L FCC ID: SK9C3A-1L

Table 7.2-7: Line 2 Conducted EMI Results (Quasi-Peak)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.246 37.9 9.7 61.8 23.9 L2 GND
0.330 31.8 9.7 59.4 27.6 L2 GND
0.648 31.6 9.7 56.0 24.3 L2 GND
0.738 39.3 9.7 56.0 16.6 L2 GND
1.224 21.4 9.7 56.0 34.5 L2 GND
1.470 17.0 9.7 56.0 38.9 L2 GND
4.194 30.3 9.6 56.0 25.6 L2 GND
16.776 30.6 9.3 60.0 29.3 L2 GND
25.164 31.2 8.8 60.0 28.7 L2 GND

Table 7.2-8: Line 2 Conducted EMI Results (Average)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.246 33.9 9.7 51.8 17.9 L2 GND
0.330 26.2 9.7 49.4 23.2 L2 GND
0.648 26.0 9.7 46.0 19.9 L2 GND
0.732 25.5 9.7 46.0 20.4 L2 GND
1.224 19.0 9.7 46.0 26.9 L2 GND
1.470 13.7 9.7 46.0 32.2 L2 GND
4.194 30.2 9.6 46.0 15.7 L2 GND
16.776 30.6 9.3 50.0 19.3 L2 GND
25.164 31.2 8.8 50.0 18.7 L2 GND

Level [dBµV]
80

70

60

50

40 x

+ x
x + x x +
x
30 x
+ +
x
+ +
+ x x
20 + +

10

0
150k 300k 500k 1M 2M 3M 5M 7M 10M 30M
Frequency [Hz]

x MES 06-0013CE05_fin QP
+ MES 06-0013CE05_fin AV
MES 06-0013CE05_pre PK
LIM FCC QP Class B
LIM FCC AV Class B

Figure 7.2-3: Conducted Emissions Graph – Line 1

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 12

Model: C3A1L FCC ID: SK9C3A-1L

Level [dBµV]
80

70

60

50

40 x
x
+
x x x+ x+ x+
30
+ + +
20 x
+
x
+
10

0
150k 300k 500k 1M 2M 3M 5M 7M 10M 30M
Frequency [Hz]

x MES 06-0013CE06_fin QP
+ MES 06-0013CE06_fin AV
MES 06-0013CE06_pre PK
LIM FCC QP Class B
LIM FCC AV Class B

Figure 7.2-4: Conducted Emissions Graph – Line 2

120V Polyphase Configuration:

Table 7.2-9: Line 1 Conducted EMI Results (Quasi-Peak)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.156 41.7 9.8 65.6 23.9 L1 GND
0.276 46.3 9.7 60.9 14.6 L1 GND
0.414 44.0 9.7 57.5 13.4 L1 GND
0.546 41.9 9.7 56.0 14.0 L1 GND
0.69 38.0 9.7 56.0 17.9 L1 GND
1.242 35.5 9.7 56.0 20.4 L1 GND
1.374 33.3 9.7 56.0 22.6 L1 GND
2.508 28.6 9.6 56.0 27.3 L1 GND
4.176 28.1 9.6 56.0 27.8 L1 GND

Table 7.2-10: Line 1 Conducted EMI Results (Average)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.15 31.6 9.8 56.0 24.3 L1 GND
0.27 35.7 9.7 51.1 15.3 L1 GND
0.276 35.5 9.7 50.9 15.4 L1 GND
0.408 32.8 9.7 47.6 14.8 L1 GND
0.552 32.6 9.7 46.0 13.3 L1 GND
0.69 29.1 9.7 46.0 16.9 L1 GND
1.236 26.0 9.7 46.0 19.9 L1 GND
1.368 25.2 9.7 46.0 20.7 L1 GND
2.46 21.0 9.6 46.0 25.0 L1 GND
4.158 20.0 9.6 46.0 25.9 L1 GND

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 13

Model: C3A1L FCC ID: SK9C3A-1L

Table 7.2-11: Line 2 Conducted EMI Results (Quasi-Peak)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.276 44.8 9.7 60.9 16.0 L2 GND
0.414 40.0 9.7 57.5 17.5 L2 GND
0.552 36.6 9.7 56.0 19.3 L2 GND
0.96 25.6 9.7 56.0 30.3 L2 GND
1.104 26.6 9.7 56.0 29.3 L2 GND
1.938 23.0 9.7 56.0 32.9 L2 GND
3.522 23.3 9.6 56.0 32.6 L2 GND
4.158 24.7 9.6 56.0 31.2 L2 GND

Table 7.2-12: Line 2 Conducted EMI Results (Average)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.276 31.8 9.7 50.9 19.0 L2 GND
0.414 27.8 9.7 47.5 19.7 L2 GND
0.552 25.5 9.7 46.0 20.4 L2 GND
0.918 16.4 9.7 46.0 29.5 L2 GND
1.086 14.9 9.7 46.0 31.0 L2 GND
1.914 13.8 9.7 46.0 32.1 L2 GND
3.6 14.7 9.6 46.0 31.2 L2 GND
4.182 16.7 9.6 46.0 29.2 L2 GND

Level [dBµV]
80

70

60

50
x
x
x x
40
x
++ x
+ + x
+
30 + x x
++
20 + +

10

0
150k 300k 500k 1M 2M 3M 5M 7M 10M 30M
Frequency [Hz]

x MES 06-0013CE003_fin QP
+ MES 06-0013CE003_fin AV
MES 06-0013CE003_pre PK
LIM FCC QP Class B
LIM FCC AV Class B

Figure 7.2-5: Conducted Emissions Graph – Line 1

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 14

Model: C3A1L FCC ID: SK9C3A-1L

Level [dBµV]
80

70

60

50
x
40 x
x
+
30
+
+ x x
x x x
20
+ + +
+ +
10

0
150k 300k 500k 1M 2M 3M 5M 7M 10M 30M
Frequency [Hz]

x MES 06-0013CE004_fin QP
+ MES 06-0013CE004_fin AV
MES 06-0013CE004_pre PK
LIM FCC QP Class B
LIM FCC AV Class B

Figure 7.2-6: Conducted Emissions Graph – Line 2

480V Polyphase Configuration:

Table 7.2-13: Line 1 Conducted EMI Results (Quasi-Peak)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.156 44.4 9.8 65.6 21.2 L1 GND
0.282 42.6 9.7 60.7 18 L1 GND
0.69 43 9.7 56 12.9 L1 GND
0.834 41.8 9.7 56 14.1 L1 GND
1.35 37.7 9.7 56 18.2 L1 GND
2.856 34.5 9.6 56 21.4 L1 GND
4.65 31.1 9.7 56 24.8 L1 GND
6.558 27.1 9.5 60 32.8 L1 GND
8.046 24.5 9.6 60 35.5 L1 GND
9.342 21.7 9.6 60 38.2 L1 GND

Table 7.2-14: Line 1 Conducted EMI Results (Average)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.15 33.6 9.8 56 22.3 L1 GND
0.294 30.4 9.7 50.4 19.9 L1 GND
0.678 35.4 9.7 46 10.5 L1 GND
0.834 33.6 9.7 46 12.3 L1 GND
1.35 29.6 9.7 46 16.3 L1 GND
2.868 27 9.6 46 18.9 L1 GND
4.668 23.6 9.7 46 22.3 L1 GND
6.576 19.6 9.5 50 30.3 L1 GND
8.016 17.3 9.6 50 32.6 L1 GND
9.378 15.2 9.6 50 34.7 L1 GND

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 15

Model: C3A1L FCC ID: SK9C3A-1L

Table 7.2-15: Line 2 Conducted EMI Results (Quasi-Peak)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.162 43.9 9.8 65.3 21.4 L2 GND
0.288 40.7 9.7 60.5 19.8 L2 GND
0.558 35.8 9.7 56 20.1 L2 GND
1.08 33.7 9.7 56 22.2 L2 GND
1.356 29.2 9.7 56 26.7 L2 GND
2.898 28.4 9.6 56 27.5 L2 GND
4.65 27.4 9.7 56 28.6 L2 GND
6.384 26.1 9.5 60 33.8 L2 GND
8.034 24.3 9.6 60 35.7 L2 GND
9.294 18.3 9.6 60 41.6 L2 GND

Table 7.2-16: Line 2 Conducted EMI Results (Average)
Frequency Level Transducer Limit Margin Line PE
MHz dBµV dB dBµV dB
0.15 31.5 9.8 56 24.4 L2 GND
0.3 26 9.7 50.2 24.2 L2 GND
0.558 25.1 9.7 46 20.8 L2 GND
1.086 23.8 9.7 46 22.1 L2 GND
1.368 19.8 9.7 46 26.1 L2 GND
2.922 20.6 9.6 46 25.3 L2 GND
4.626 20.3 9.7 46 25.6 L2 GND
6.366 18.7 9.5 50 31.2 L2 GND
7.986 17 9.6 50 32.9 L2 GND
9.312 12.6 9.6 50 37.3 L2 GND

Level [dBµV]
80

70

60

50
x x x
x
40
x
+ x
+ +
30 + x
+
+ x
+ x
x
20 +
+
+
10

0
150k 300k 500k 1M 2M 3M 5M 7M 10M 30M
Frequency [Hz]

x MES 06-0012CE07_fin QP
+ MES 06-0012CE07_fin AV
MES 06-0012CE07_pre PK
LIM FCC QP Class B
LIM FCC AV Class B

Figure 7.2-7: Conducted Emissions Graph – Line 1

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 16

Model: C3A1L FCC ID: SK9C3A-1L

Level [dBµV]
80

70

60

50

x
40 x
x
x
30 + x x x
+ + x
+ x
20 + + +
+
+ x
+
10

0
150k 300k 500k 1M 2M 3M 5M 7M 10M 30M
Frequency [Hz]

x MES 06-0012CE08_fin QP
+ MES 06-0012CE08_fin AV
MES 06-0012CE08_pre PK
LIM FCC QP Class B
LIM FCC AV Class B

Figure 7.2-8: Conducted Emissions Graph – Line 2

7.3 Radiated Emissions - FCC Section 15.109(Unintentional Radiation)

7.3.1 Test Methodology
Radiated emissions tests were performed over the frequency range of 30MHz to 1 GHz. Measurements
of the radiated field strength were made at a distance of 3m from the boundary of the equipment under
test (EUT) and the receiving antenna. The antenna height was varied from 1m to 4m so that the
maximum radiated emissions level would be detected. Radiated measurements were made with the
Spectrum Analyzer’s resolution bandwidth set to 120 KHz for measurements above 30MHz. Average
measurements are taken with the RBW and VBW were set to 1MHz and 10 Hz respectively for
measurements above 1000MHz.

7.3.2 Test Results
Results of the test are given in Table 7.3-1 below:

Table 7.3-1: Radiated Emissions Tabulated Data

Frequency Polarization Height Azimuth Level Limit Margin
(MHz) (cm) (deg) (dBµV/m) (dBµV/m) (dB)

MHz VERTICAL 105 211 28.4 40.0 11.6
55.84 VERTICAL 110 332 26.1 40.0 13.9
60.72 VERTICAL 170 322 41.5 43.5 2.0
95.12 HORIZONTAL 190 86 28.5 43.5 15.0
151.04 HORIZONTAL 100 274 13.4 46.0 32.6
336.56 HORIZONTAL 190 197 15.9 46.0 30.1
405.52 VERTICAL 150 9 32.4 46.0 13.6
645.12 VERTICAL 110 167 18.3 46.0 27.7
650.08 HORIZONTAL 105 1 31.7 46.0 14.3
663.52 HORIZONTAL 298 75 24.6 46.0 21.4

* Note: All emissions above 663.52 MHz were attenuated below the permissible limit.

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 17

Model: C3A1L FCC ID: SK9C3A-1L

7.4 Peak Output Power – FCC Section 15.247(b)(2)

7.4.1 Test Methodology (Conducted Method)
The 20dB bandwidth of the EUT was within the resolution bandwidth of spectrum analyzer, therefore the
power measurement was made using the spectrum analyzer method. The resolution and video
bandwidth were set to > 20 dB bandwidth of the emission measured. The device employs >50 channels
therefore the power is limited to 1 Watt.

7.4.2 Test Results
Results are shown below in table 7.4-1 and the worst case was plotted and shown in figure 7.4-1 to 7.4-3
below:

Table 7.4-1: RF Output Power
Frequency Level
[MHz] [dBm]
909.506 13.25
916.040 12.62
921.773 12.15

Mkr1 909.506 MHz
Ref 20 dBm Atten 30 dB 13.25 dBm
Peak 1

Log
10
dB/

M1 S2
S3 FC
AA

Center 909.6 MHz Span 2 MHz
#Res BW 1 MHz VBW 1 MHz Sweep 5 ms (401 pts)

Figure 7.4-1: Output power – Low Channel

Mkr1 916.040 MHz
Ref 20 dBm #Atten 30 dB 12.62 dBm
Peak 1
Log
10
dB/

M1 S2
S3 FC
AA

Center 916 MHz Span 2 MHz
#Res BW 1 MHz VBW 1 MHz Sweep 5 ms (401 pts)

Figure 7.4-2: Output power – Mid Channel

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 18

Model: C3A1L FCC ID: SK9C3A-1L

Mkr1 921.773 MHz
Ref 20 dBm Atten 30 dB 12.15 dBm
Peak 1
Log
10
dB/

V1 S2
S3 FC
AA

Center 921.7 MHz Span 2 MHz
#Res BW 1 MHz VBW 1 MHz Sweep 5 ms (401 pts)

Figure 7.4-3: Output power – High Channel

7.5 Channel Usage Requirements - FCC Section 15.247(a) (1)

15.247(a)(1): 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. The system
shall hop to channel frequencies that are selected at the system hopping rate from a pseudo randomly
ordered list of hopping frequencies. Each frequency must be used equally on the average by each
transmitter. The system receivers shall have input bandwidths that match the hopping channel
bandwidths of their corresponding transmitters and shall shift frequencies in synchronization with the
transmitted signals.

15.247(a) (1) (i): For frequency hopping systems operating in the 902–928 MHz band: if the 20 dB
bandwidth of the hopping channel is less than 250 kHz, the system shall use at least 50 hopping
frequencies and the average time of occupancy on any frequency shall not be greater than 0.4 seconds
within a 20 second period; if the 20 dB bandwidth of the hopping channel is 250 kHz or greater, the
system shall use at least 25 hopping frequencies and the average time of occupancy on any frequency
shall not be greater than 0.4 seconds within a 10 second period. The maximum allowed 20 dB bandwidth
of the hopping channel is 500 kHz.

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 19

Model: C3A1L FCC ID: SK9C3A-1L

7.5.3 Channel Dwell Time

The worse case with regards to RF dwell time on C3A1H that can occur is when the SCM burst of
messages and IDM message happen to occur back to back on the same channel. This will give you a
worst case dwell time of 115.23 msec with is the combined transmission times of the two message types.
This dwell time is less than 400 msec and this channel would not be transmitted upon until 50 channel
hops later. With transmission rates set to 30 sec, this means that this channel would not be used until 25
minutes later. This is obviously less than 20 sec and hence the RF dwell time meets the less than 400
msec within a 20 sec criteria.

A more detailed description of dwell time can be found attached to the Theory of Operations.

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 21

Model: C3A1L FCC ID: SK9C3A-1L

7.5.4 20dB Bandwidth

7.5.4.1 Test Methodology
The spectrum analyzer span was set to 2 to 3 times the estimated 20 dB bandwidth of the emission. The
RBW was to ≥ 1% of the estimated 20 dB bandwidth. The trace was set to max hold with a peak detector
active. The span and RBW were examined and re-adjusted if necessary to meet the requirements of 2 to
3 time the 20 bandwidth for the span and ≥ 1% of the 20 dB bandwidth for the RBW.

7.5.4.2 Test Results
The maximum 20dB bandwidth was found to be approximately 114.5 kHz. Results are shown below in
Table 7.5.4-1and Figures 7.5.4-1 through 7.5.4-3.

Table 7.5.4-1: 20dB Bandwidth
Channel Frequency 20dB Bandwidth
(MHz) (kHz)
Low 909.6 110.0
Mid 916.0 114.0
High 921.8 114.5

Mkr1 ∆ 110.0 kHz
Ref 20 dBm Atten 30 dB 0.052 dB
Peak
Log
10
dB/
1R 1

V1 S2
S3 FC
AA

Center 909.6 MHz Span 200 kHz
#Res BW 10 kHz VBW 10 kHz Sweep 8.5 ms (401 pts)

Figure 7.5.4-1: 20dB Bandwidth Low Channel

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 22

Model: C3A1L FCC ID: SK9C3A-1L

Mkr1 ∆ 114.0 kHz
Ref 20 dBm #Atten 30 dB -0.448 dB
Peak
Log
10
dB/
1R 1

M1 S2
S3 FC
AA

Center 916 MHz Span 200 kHz
#Res BW 10 kHz VBW 10 kHz Sweep 8.5 ms (401 pts)

Figure 7.5.4-2: 20dB Bandwidth Mid Channel

Mkr1 ∆ 114.5 kHz
Ref 20 dBm Atten 30 dB 0.54 dB
Peak
Log
10
dB/
1R 1

M1 S2
S3 FC
AA

Center 921.8 MHz Span 200 kHz
#Res BW 10 kHz VBW 10 kHz Sweep 8.5 ms (401 pts)

Figure 7.5.4-3: 20dB Bandwidth High Channel

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 23

Model: C3A1L FCC ID: SK9C3A-1L

7.6 Band-Edge Compliance and Spurious Emissions - FCC Section 15.247(c)

7.6.1 Band-Edge Compliance of RF Conducted Emissions

7.6.1.1 Test Methodology
The EUT was investigated at the lowest and highest channel available to determine band-edge
compliance. For each measurement the spectrum analyzer’s RBW was set to 100 kHz, which is ≥ 1% of
the span.

7.6.1.2 Test Results
In a 100 kHz bandwidth at the lower and upper band-edge, the radio frequency power that was produced
by the EUT is at least 20 dB below that in the 100 kHz bandwidth within the band that contains the
highest level of desired power. Band-edge compliance is displayed in Figures 7.6.1-1 and 7.6.2-2

Mkr1 ∆ 7.575 MHz
Ref 20 dBm Atten 30 dB 64.51 dB
Peak 1

Log
10
dB/

M1 S2
1R
S3 FC
AA

Start 901 MHz Stop 911 MHz
#Res BW 100 kHz VBW 100 kHz Sweep 4 ms (401 pts)

Figure 7.6.1-1: Lower Band-edge

Mkr1 ∆ -6.250 MHz
Ref 20 dBm #Atten 30 dB 64.16 dB
Peak 1
Log
10
dB/

V1 S2
1R
S3 FC
AA

Start 920 MHz Stop 930 MHz
#Res BW 100 kHz VBW 100 kHz Sweep 4 ms (401 pts)

Figure 7.6.1-2: Upper Band-edge

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 24

Model: C3A1L FCC ID: SK9C3A-1L

7.6.2 RF Conducted Spurious Emissions

7.6.2.1 Test Methodology
The EUT was investigated for conducted spurious emissions from 30MHz to 10GHz, 10 times the highest
fundamental frequency. Measurements were made at the low, center and high channels of the EUT. For
each measurement, the spectrum analyzer’s VBW was set to 100kHz and the RBW was set to 100kHz.
A peak detector function was used with the trace set to max hold.

7.6.2.1 Test Results
All emission found were greater than 20dB down from the fundamental carrier. The RF conducted
spurious emissions were measured in the band of 30MHz to 10GHz. Results are shown below in Figure
7.6.2-1 through 7.6.2-6.

Mkr1 711.4 MHz
Ref 20 dBm Atten 30 dB -44.12 dBm
Peak
Log
10
dB/

Dl
-7.0
dBm

1
V1 S2
S3 FC
AA

Start 30 MHz Stop 1 GHz
#Res BW 100 kHz VBW 100 kHz Sweep 125 ms (401 pts)

Figure 7.6.2-1 RF Conducted Spurious Emissions – Low Channel

Mkr1 3.1150 GHz
Ref 20 dBm #Atten 40 dB -42.04 dBm
Peak
Log
10
dB/

Dl
-7.0
dBm

1

V1 S2
S3 FC
AA

Start 1 GHz Stop 10 GHz
#Res BW 100 kHz VBW 100 kHz Sweep 1.16 s (401 pts)

Figure 7.6.2-2 RF Conducted Spurious Emissions – Low Channel

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 25

Model: C3A1L FCC ID: SK9C3A-1L

Mkr1 658.1 MHz
Ref 20 dBm #Atten 30 dB -43.36 dBm
Peak
Log
10
dB/

Dl
-7.4
dBm

1

M1 S2
S3 FC
AA

Start 30 MHz Stop 1 GHz
#Res BW 100 kHz VBW 100 kHz #Sweep 125 ms (401 pts)

Figure 7.6.2-3 RF Conducted Spurious Emissions – Mid Channel

Mkr1 3.0250 GHz
Ref 20 dBm Atten 30 dB -35.46 dBm
Peak
Log
10
dB/

Dl
-7.5
dBm
1

M1 S2
S3 FC
AA

Start 1 GHz Stop 10 GHz
Res BW 1 MHz VBW 3 MHz Sweep 23.59 ms (401 pts)

Figure 7.6.2-4 RF Conducted Spurious Emissions – Mid Channel

Mkr1 202.2 MHz
Ref 20 dBm Atten 30 dB -41.65 dBm
Peak
Log
10
dB/

Dl
-7.9
dBm

1

M1 S2
S3 FC
AA

Start 30 MHz Stop 1 GHz
#Res BW 100 kHz VBW 100 kHz #Sweep 125 ms (401 pts)

Figure 7.6.2-5 RF Conducted Spurious Emissions – High Channel

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 26

Model: C3A1L FCC ID: SK9C3A-1L

Mkr1 1.8550 GHz
Ref 15 dBm #Atten 40 dB -42.37 dBm
Peak
Log
10
dB/

Dl
-7.9
dBm
1

V1 S2
S3 FC
AA

Start 1 GHz Stop 10 GHz
#Res BW 100 kHz VBW 100 kHz Sweep 1.16 s (401 pts)

Figure 7.6.2-6 RF Conducted Spurious Emissions – High Channel

7.6.3 Radiated Spurious Emissions (Restricted Bands) - FCC Section 15.205

7.6.3.1 Test Methodology
Radiated emissions tests were made over the frequency range of 30MHz to 10GHz, 10 times the highest
fundamental frequency.

The EUT was rotated through 360° and the receive antenna height was varied from 1m to 4m so that the
maximum radiated emissions level would be detected. For frequencies below 1000MHz, quasi-peak
measurements were made using a resolution bandwidth (RBW) of 120 kHz and a video bandwidth (VBW)
of 300 kHz. For frequencies above 1000MHz, average measurements were made using an RBW of 1
MHz and a VBW of 10 Hz and peak measurements were made with RBW of 1 MHz and a VBW of 1
MHz.

The EUT was caused to generate a continuous carrier signal on the hopping channel.

7.6.3.2 Duty Cycle Correction
For average radiated measurements, the measured level was reduced by a factor 6.9dB to account for
the duty cycle of the EUT. Referencing the dwell time justification in section 7.5.3 above the worst case
duty cycle within 100ms is 45% or 45ms for the IDM message type. The duty cycle correction factor is
determined using the formula: 20log (0.45)=-6.9dB.

The more detailed justification of duty cycle can be found in the dwell time justification attached to the
Theory of Operations.

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 27

Model: C3A1L FCC ID: SK9C3A-1L

7.6.3.3 Test Results
Radiated spurious emissions found in the band of 30MHz to 10GHz are reported in Table 7.6.3-1.
through 7.6.3-3. Each emission found to be in a restricted band as defined by section 15.205, was
compared to the radiated emission limits as defined in section 15.209.

Table 7.6.3-1: Radiated Spurious Emissions – Monophase 120V Meter Base
Frequency Level (dBuV) Antenna Correction Corrected Level Limit Margin
Polarity Factors (dBuV/m) (dBuV/m) (dB)
(MHz) pk avg (H/V) (dB) pk avg pk avg pk avg
Spurious Emissions - Low Channel
2728.77 49.95 49.95 H 2.31 52.26 45.33 74 54 21.74 8.67
2728.77 50.86 50.86 V 2.31 53.17 46.24 74 54 20.83 7.76
4547.95 45.33 45.33 H 7.81 53.14 46.20 74 54 20.86 7.80
4547.95 44.14 44.14 V 7.81 51.95 45.01 74 54 22.05 8.99
Spurious Emissions - Mid Channel
2748.021 48.66 48.66 H 2.38 51.04 44.10 74 54 22.96 9.90
2748.021 50.43 50.43 V 2.38 52.81 45.87 74 54 21.19 8.13
Spurious Emissions - High Channel
2765.319 52.52 52.52 H 2.43 54.95 48.02 74 54 19.05 5.98
2765.319 49.95 49.95 V 2.43 52.38 45.45 74 54 21.62 8.55
* The magnitude of all emissions not reported were below the noise floor of the measurement system.

Table 7.6.3-2: Radiated Spurious Emissions – Monophase 240V Meter Base
Frequency Level (dBuV) Antenna Correction Corrected Level Limit Margin
Polarity Factors (dBuV/m) (dBuV/m) (dB)
(MHz) pk avg (H/V) (dB) pk avg pk avg pk avg
Spurious Emissions - Low Channel
2728.77 50.59 50.59 H 2.31 52.90 45.97 74 54 21.10 8.03
2728.77 50.43 50.43 V 2.31 52.74 45.81 74 54 21.26 8.19
3638.36 43.15 43.15 H 5.79 48.94 42.00 74 54 25.06 12.00
4547.95 44.97 44.97 H 7.81 52.78 45.84 74 54 21.22 8.16
4547.95 44.69 44.69 V 7.81 52.50 45.56 74 54 21.50 8.44
Spurious Emissions - Mid Channel
2748.021 52.36 52.36 H 2.38 54.74 47.80 74 54 19.26 6.20
2748.021 48.66 48.66 V 2.38 51.04 44.10 74 54 22.96 9.90
4580.035 43.86 43.86 H 7.95 51.81 44.87 74 54 22.19 9.13
4580.035 42.56 42.56 V 7.95 50.51 43.57 74 54 23.49 10.43
Spurious Emissions - High Channel
2765.319 54.70 54.70 H 2.43 57.13 50.20 74 54 16.87 3.80
2765.319 52.01 52.01 V 2.43 54.44 47.51 74 54 19.56 6.49
3687.092 42.66 42.66 H 5.97 48.63 41.69 74 54 25.37 12.31
3687.092 42.84 42.84 V 5.97 48.81 41.87 74 54 25.19 12.13
4608.865 44.08 44.08 H 8.07 52.15 45.22 74 54 21.85 8.78
4608.865 43.37 43.37 V 8.07 51.44 44.51 74 54 22.56 9.49
* The magnitude of all emissions not reported were below the noise floor of the measurement system.

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 28

Model: C3A1L FCC ID: SK9C3A-1L

Table 7.6.3-3: Radiated Spurious Emissions –Polyphase Meter Base
Frequency Level (dBuV) Antenna Correction Corrected Level Limit Margin
Polarity Factors (dBuV/m) (dBuV/m) (dB)
(MHz) pk avg (H/V) (dB) pk avg pk avg pk avg
Spurious Emissions - Low Channel
2728.758 51.37 51.37 H 2.31 53.68 46.75 74 54 20.32 7.25
2728.758 54.04 54.04 V 2.31 56.35 49.42 74 54 17.65 4.58
3638.344 45.38 45.38 H 5.79 51.17 44.23 74 54 22.83 9.77
3638.344 45.00 45.00 V 5.79 50.79 43.85 74 54 23.21 10.15
4547.93 50.18 50.18 H 7.81 57.99 51.05 74 54 16.01 2.95
4547.93 50.46 50.46 V 7.81 58.27 51.33 74 54 15.73 2.67
Spurious Emissions - Mid Channel
2748.021 54.45 54.45 H 2.38 56.83 49.89 74 54 17.17 4.11
2748.021 53.10 53.10 V 2.38 55.48 48.54 74 54 18.52 5.46
4580.035 48.33 48.33 H 7.95 56.28 49.34 74 54 17.72 4.66
4580.035 49.21 49.21 V 7.95 57.16 50.22 74 54 16.84 3.78
Spurious Emissions - High Channel
2765.319 55.72 55.72 H 2.43 58.15 51.22 74 54 15.85 2.78
2765.319 54.45 54.45 V 2.43 56.88 49.95 74 54 17.12 4.05
4608.865 48.45 48.45 H 8.07 56.52 49.59 74 54 17.48 4.41
4608.865 50.41 50.41 V 8.07 58.48 51.55 74 54 15.52 2.45
* The magnitude of all emissions not reported were below the noise floor of the measurement system.

7.6.3.3 Sample Calculation:

RC = RU + CFT

Where:
CFT = Total Correction Factor (AF+CA+AG)-DC (Average Measurements Only)
RU = Uncorrected Reading
RC = Corrected Level
AF = Antenna Factor
CA = Cable Attenuation
AG = Amplifier Gain
DC = Duty Cycle Correction Factor

Example Calculation

PEAK:
Corrected Level: 49.95 + 2.31 = 52.26 dBuV
Margin: 74dBuV – 52.26 dBuV = 21.74 dB

AVERAGE:
Corrected Level: 49.95 + 2.31 -6.92 = 45.34 dBuV
Margin: 54dBuV – 45.34 dBuV = 8.66 dB

8.0 CONCLUSION
In the opinion of ACS, Inc. the C3A1L, manufactured by Itron Electricity Metering Inc., meets the
requirements of FCC Part 15 subpart C.

ACS Report: 06-0013-15C Advanced Compliance Solutions Page 29

Document Created: 2006-03-09 09:16:24
Document Modified: 2006-03-09 09:16:24

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