Test Report

FCC ID: HDCTRACERL9

Test Report

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FCCID_239965

$A Application for Class 2 Permissive Change ADTRAN, Inc. Tracer Monitored Protection Switch (1 Watt RFC) Model: 1280300L1 47 CFR, Part 15, Subpart C, §15.247 for Spread Spectrum Transmitters FCC ID: HDCTRACERL9 Report Date: February 21, 2002 February 15 – February 16, May 7, 2001 Test Dates: January 28, 2002 3018370 RPT# 0218370U \\emc\reports\2002\Adtran\3018370\0218370u.doc$

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TABLE OF CONTENTS
1.0 GENERAL DESCRIPTION .......................................................................................................................... 5
1.1 PRODUCT DESCRIPTION ................................................................................................................................. 5
1.2 RELATED SUBMITTAL(S) GRANTS ................................................................................................................. 6
1.3 TEST METHODOLOGY .................................................................................................................................... 6
1.4 TEST FACILITY ............................................................................................................................................... 6
2.0 SYSTEM TEST CONFIGURATION ........................................................................................................... 7
2.1 JUSTIFICATION ............................................................................................................................................... 7
2.2 EUT EXERCISING SOFTWARE ........................................................................................................................ 7
2.3 SPECIAL ACCESSORIES ................................................................................................................................... 8
2.4 EQUIPMENT MODIFICATIONS ......................................................................................................................... 8
2.5 SUPPORT EQUIPMENT LIST AND DESCRIPTION ............................................................................................... 8
2.6 TEST CONFIGURATION BLOCK DIAGRAM ...................................................................................................... 9
3.0 TEST RESULTS ........................................................................................................................................... 10
3.1 EMISSION BANDWIDTH ................................................................................................................................ 10
3.2 POWER OUTPUT ........................................................................................................................................... 11
3.2.1 Specific Absorption Rate and Maximum Permissible Exposure (MPE).............................................. 12
3.3 FIELD STRENGTH CALCULATION ................................................................................................................. 13
3.4 TRANSMITTER CONDUCTED SPURIOUS EMISSIONS ...................................................................................... 14
3.4.1 Transmitter Conducted Spurious Emissions Data: Plan A ................................................................. 15
3.4.2 Transmitter Conducted Spurious Emissions Data: Plan B ................................................................. 16
3.5 RADIATED EMISSIONS .................................................................................................................................. 17
3.6 AC POWER LINE-CONDUCTED EMISSIONS .................................................................................................. 21
3.7 POWER SPECTRAL DENSITY ......................................................................................................................... 22
4.0 MISCELLANEOUS INFORMATION ....................................................................................................... 24
4.1 DISCUSSION OF PULSE DESENSITIZATION .................................................................................................... 24
4.2 CALCULATION OF AVERAGE FACTOR .......................................................................................................... 24
4.3 EMISSIONS TEST PROCEDURES .................................................................................................................... 24
5.0 TEST EQUIPMENT........................................................................................................................................... 25

List of Exhibits
EXHIBIT 1: RF Block Diagram
EXHIBIT 2: Equipment Photographs
EXHIBIT 3: Schematics
EXHIBIT 4: Label Information and Location

List of Figures
Figure 1 – Plan A Bandwidth Plot ..............................................................................................................10
Figure 2 – Plan B Bandwidth Plot...............................................................................................................11
Figure 3: Antenna Conducted Emissions – Plan A .....................................................................................15
Figure 4: Antenna Conducted Emissions – Plan B .....................................................................................16
Figure 5: Radiated Spurious Emissions, 30 - 1000 MHz ............................................................................17
Figure 6: Radiated Spurious Emissions, 1000 - 22000 MHz ......................................................................18
Figure 7: Worst Case Radiated Emissions Setup – Front View..................................................................19
Figure 8: Worst Case Radiated Emissions Setup – Rear View ...................................................................20
Figure 9: Power Spectral Density - Plan A .................................................................................................22
Figure 10: Power Spectral Density – Plan B...............................................................................................23

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
4

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1.2 Related Submittal(s) Grants
This is a single Application for a Class 2 Permissive Change.

1.3 Test Methodology
Radiated emission measurements were performed according to the procedures in ANSI C63.4 (1992). All
radiated measurements were performed in a 10 meter semi-anechoic chamber. For each scan, the procedure
for maximizing emissions in Section 4.3 were followed. All radiated tests were performed at an antenna to
EUT distance of 3 meters, unless stated otherwise in the "Justification Section" of this application.

1.4 Test Facility
The facility used to collect the radiated data is located at 1950 Evergreen Blvd., Suite 100, Duluth, Georgia.
This test facility is registered with the FCC under registration number 99512.

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
6

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2.0 System Test Configuration
2.1 Justification
The system was configured for testing in a typical fashion (as a customer would normally use it). The
Tracer Monitored Protection Switch (MPS), the Radio Frequency Converter (RFC) and the Baseband
Processor (BBP) portions of the TRACER were mounted together in a 19” metal telecom rack and
configured with cables typically provided by ADTRAN, Inc. Two frequency plans are available for use.
Switching a pair of coaxial cables located within the RFC causes the TRACER to toggle between Plan A
and Plan B. Both plans were tested for radiated and conducted spurious emissions. These configurations
represent typical installations of this system. During testing, all cables were manipulated to produce the
worst case emissions.
For this permissive change, only a single antenna was measured for radiated spurious emissions. Because
the spurs for this antenna were the same level or better than those measured during the initial testing, the
other antennas were not investigated. Please reference FCC ID# HDCTRACERL9 for the initial filing and
the contained data. During testing, the transmit antenna under test was positioned at a fixed height of 1.5
meters.
For simplicity of testing, the EUT was configured to transmit continuously. The EUT was configured to
transmit a typical maximum data stream during testing. Both frequency plans offered with this device were
tested.

2.2 EUT Exercising Software
There was no special software to exercise the device. For simplicity of testing, the unit was configured to
transmit continuously.

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
7

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2.3 Special Accessories
There are no special accessories for compliance of this product.

2.4 Equipment Modifications
Any modifications installed previous to testing by ADTRAN, Inc. will be incorporated in each production
model sold/leased in United States

No modifications were installed by Intertek Testing Services, Inc.

2.5 Support Equipment List and Description
The FCC ID's for all equipment, plus descriptions of all cables used in the tested system (including inserted
cards, which have grants) are:

Equipment:

No support equipment was necessary to operate and exercise the TRACER.

Cables:

(2) DC Pair, 5 meters, unshielded
RG-58 coaxial cable, 0.4 meters, (BBP to RFC), N-type connectors
Semi-Rigid coax, 0.4 meters, (RFC to MPS), SMA connectors
Sucoflex coaxial cable, 1.5 meters (MPS to 50 Ohm Termination), N-type connectors
Sucoflex coaxial cable, 1.5 meters (MPS to Antenna), N-type/SMA connectors
(6) Category 3 UTP, 1.5 meters, (T1 connections)
(6) 8-Pin Flat Cables, 1.5 meters, (Craft Interfaces and Alarm)

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
8

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2.6 Test Configuration Block Diagram

19” Telco Rack

Craft Main RF Main Stby
Main Alarm DC T1A T1B
Monitored Protection Switch RS-232
Stby Out In B A B A
Stby Ant

Ground Straps
IF IN
Antenna RFC Section
ANT

RS-232 In T1A T1B
DC
BBP Section
Out

50
Ohms

Loopbacks

10 cm

48VDC
Power Supply

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
9

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3.0 Test Results
Data is included of the worst case configuration (the configuration which resulted in the highest emission
levels). A sample calculation, configuration photographs, data tables and plots of the emissions are
included.

3.1 Emission Bandwidth
The 6dB bandwidth was measured to be approximately 27 MHz. The following plots were taken with a
resolution bandwidth (RBW) of 100 kHz and a video bandwidth (VBW) of 300 kHz. The maximum level
of the emission was measured to be 13 dBm. The display line is placed at 6dB down from the highest peak.
The plots have been corrected to account for cable loss and external attenuation.

Tracer Monitor Protection Switch
Plan A - 1 Watt RFC
6dB Bandwidth

15.0

10.0

5.0

0
Amplitude (dBm)

-5.0

-10.0

-15.0

-20.0

-25.0

-30.0

-35.0

-40.0
2.400G 2.441G
Frequency

Figure 1 – Plan A Bandwidth Plot

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
10

A
Tracer Monitor Protection Switch
Plan B - 1 Watt RFC
6dB Bandwidth

15.0

10.0

5.0

0
Amplitude (dBm)

-5.0

-10.0

-15.0

-20.0

-25.0

-30.0

-35.0

-40.0
2.441G 2.484G
Frequency

Figure 2 – Plan B Bandwidth Plot

3.2 Power Output
Section 15.247(b)(1) specifies that the maximum peak output power of a direct sequence spread spectrum
transmitter shall not exceed one watt. The peak output power was measured with a power meter to be 30.02
dBm (1004.6 mW) as measured at the antenna port of the MPS. This reading was taken with the TRACER
set to the highest transmit power.
These measurements were made with a Boonton power meter, Model Number: 4232A-01 in conjunction
with a Boonton power sensor, Model Number: 51013.

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
11

A
3.2.1 Specific Absorption Rate and Maximum Permissible Exposure (MPE)
The calculations below for maximum transmitted power and the MPE limits are based on OET 65 Edition
97-01, August 1997. The Tracer is designed for a maximum transmit power of 30 dBm (1000 mW). The
highest allowable antenna gain for a 1 Watt transmitter as stated in §15.247 (b)(3) is 6 dBi or 3.981.
Assuming a worst case scenario, the power density at a distance of 1 meter was calculated as follows:

Using the equation for power density S=PG/4*π*R2
Where S = power density in mW/cm2
P = transmit power in milliwatts
G = numeric gain of transmit antenna
R = distance (cm)
S = {(1000)(3.981)}/{4*π*(100)2}
S = 31.68 µW/cm2 at a distance of 1 meter.

This power density is worst case with maximum beam exposure. This level is below the 1 mW/cm2 MPE
for General Population / Uncontrolled Exposure as stated in OET 65 Edition 97-01, August 1997. This
device is designed for telecommunications transmission for distances over 20 miles. As stated in the User’s
Manual, this device must be installed only by professionals. The following precautions are also outlined in
the User’s Manual to prevent exposure to high levels of RF energy:

• The installed antenna must not be located in a manner that allows exposure of the general population to
the direct beam path of the antenna at a distance of less than 15 feet (4.6 meters). Installation on
towers, masts, or rooftops not accessible to the general population is recommended; or
• Mount the antenna in a manner that prevents any personnel from entering the area within 15 feet (4.6
meters) from the front of the antenna.
• It is recommended that the installer place radio frequency hazard warnings signs on the barrier that
prevents access to the antenna.
• Prior to installing the antenna to the RFC output, make sure the power is adjusted to the settings
specified in section 2 of this manual.
• During antenna installation, be sure that the power to the TRACER equipment is turned off in order to
prevent any energy presence on the coaxial connector.
• During installation and alignment of the antenna, do not stand in front of the antenna assembly.
• During installation and alignment of the antenna, do not handle or touch the front of the antenna.

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
12

A
3.3 Field Strength Calculation
The field strength is calculated by adding the Antenna Factor and Cable Factor, and subtracting the
Amplifier Gain (if any) from the measured reading. The basic equation with a sample calculation is as
follows:

FS = RA + AF + CF - AG
where FS = Field Strength in dB(uV/m)
RA = Receiver Amplitude (including preamplifier) in dB(uV)
CF = Cable Attenuation Factor in dB
AF = Antenna Factor in dB(1/m)
AG = Amplifier Gain in dB

In the following table(s), the reading shown on the data table reflects the preamplifier gain. An example for
the calculations in the following table is as follows:

Assume a receiver reading of 52.0 dB(uV) is obtained. The antenna factor of 7.4 dB(1/m) and cable factor
of 1.6 dB is added. The amplifier gain of 29 dB is subtracted, giving a field strength of 32 dB(uV/m). This
value in dB(uV/m) was converted to its corresponding level in V/m.

RA = 52.0 dB(uV)
AF = 7.4 dB
CF = 1.6 dB(1/m)
AG = 29.0 dB

FS = 52.0 + 7.4 + 1.6 - 29.0 = 32 dB(uV/m)

Level in uV/m = Common Antilogarithm [(32 dB(uV/m))/20] = 39.8 uV/m

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
13

A
3.4 Transmitter Conducted Spurious Emissions
§15.247(c) specifies requirements for spurious emissions from direct sequence spread spectrum
transmitters. In any 100 kHz bandwidth outside the frequency bands listed in §15.247, the radio frequency
power that is produced by the modulation products of the spreading sequence, the information sequence
and the carrier frequency shall be either at least 20 dB below that in any 100 kHz bandwidth within the
band that contains the highest level of the desired power or shall not exceed the general levels specified in
§15.209(a), whichever results in the lesser attenuation. All other emissions outside these bands shall not
exceed the general radiated emission limits specified in §15.209(a).

Two separate tests (described below) were performed to determine the spurious emissions from the device:
(1) The first test was performed using a direct connection between the antenna port of the transmitter
and the spectrum analyzer. The resolution bandwidth was set to 100 kHz, and the video
bandwidth was set greater than the resolution bandwidth. A scan was performed up to the tenth
harmonic to ensure that all the harmonics/spurs were at least 20 dB down from the highest
emission level within the authorized frequency bands. The results of this test are shown in Figure
3.
(2) The second test was a radiated emission test to determine the amplitude of harmonics/spurs which
fall within the restricted bands listed in §15.205(a). The limits for emissions in these restricted
bands are listed in §15.209. For measurements above 1 GHz, a resolution bandwidth of 1 MHz
and a video bandwidth of 1 MHz were used. The results of this test are shown in Table 3.5-2 and
3.5-3. This test was performed with a representative sample of each antenna type that is to be used
with this device. For measurements in the restricted band of 2.4835 – 2.5 GHz, a notch filter was
employed. The notch filter was designed to pass only frequencies in this restricted band.

EUT BP Filter PA Analyzer
2483.5 – 2500 MHz

Ant Ant
For measurements of all emissions above 3 GHz, a high pass filter was employed.

EUT HP Filter PA+ATT Analyzer

Ant Ant

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
14

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3.4.1 Transmitter Conducted Spurious Emissions Data: Plan A
The data shown below lists the significant emission frequencies, the limit and the margin of compliance.
Numbers with a minus sign are below the limit.

Figure 3: Antenna Conducted Emissions – Plan A

Tracer Monitor Protection Switch Limit
Plan A - 1 Watt RFC PlanA_Spurs

Antenna Port Conducted Spurious Emissions

20.0

10.0

0

-10.0
Amplitude (dBm)

-20.0

-30.0

-40.0

-50.0

-60.0

-70.0
30.0M 10.0G 20.0G
Frequency

TEST PERSONNEL:

Tester Signature

Jeremy O. Pickens / Senior Project Engineer
Typed/Printed Name

Date

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
15

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3.4.2 Transmitter Conducted Spurious Emissions Data: Plan B

The data shown below lists the significant emission frequencies, the limit and the margin of compliance.
Numbers with a minus sign are below the limit.

Figure 4: Antenna Conducted Emissions – Plan B

Tracer Monitor Protection Switch
PlanB_Spurs
Plan B - 1 Watt RFC Limit
Antenna Port Conducted Spurious Emissions

20.0

10.0

0
Amplitude (dBm)

-10.0

-20.0

-30.0

-40.0

-50.0

-60.0

-70.0
30.0M 10.0G 20.0G
Frequency

TEST PERSONNEL:

Tester Signature

Jeremy O. Pickens / Senior Project Engineer
Typed/Printed Name

Date

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
16

A
3.5 Radiated Emissions

The data shown below lists the significant emission frequencies, the limit and the margin of compliance.
Numbers with a minus sign are below the limit.
The TRACER was terminated into a 50 ohm load at the end of a 1.5 meter coaxial cable installed on the
antenna port of the transmitter section.

Figure 5: Radiated Spurious Emissions, 30 - 1000 MHz

Company: ADTRAN, Inc. Tested by: Jeremy O. Pickens
Model: Tracer MPS Location: Duluth
Job No.: J200 Detector: HP8546
Date: 02/16/01 Antenna: EMCO3141
Standard: FCC15 PreAmp: Schaffner
Class: A Group: None Cable(s): CABLETW2 CABLEN2
Notes: 1 Watt RFC Distance: 10

Ant. Antenna Cable Pre-amp Distance
Pol. Frequency Reading Factor Loss Factor Factor Net Limit Margin
(V/H) MHz dB(uV) dB(1/m) dB dB dB dB(uV/m) dB(uV/m) dB
v 68.810 44.8 7.2 1.2 20.2 0.0 33.0 39.1 -6.1
v 83.550 43.5 8.6 1.3 20.2 0.0 33.2 39.1 -5.9
h 373.705 35.3 16.4 3.0 19.9 0.0 34.7 46.4 -11.7
v 373.705 39.7 16.4 3.0 19.9 0.0 39.1 46.4 -7.3
v 453.815 35.5 17.7 3.4 19.7 0.0 36.9 46.4 -9.5
v 655.605 38.7 21.0 4.2 19.7 0.0 44.2 46.4 -2.2
v 706.035 37.5 21.8 4.4 19.6 0.0 44.1 46.4 -2.3
v 957.790 26.4 24.1 5.2 19.2 0.0 36.5 46.4 -9.9

TEST PERSONNEL:

Tester Signature

Jeremy O. Pickens / Senior Project Engineer
Typed/Printed Name

Date

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
17

A
The data shown below lists the significant emission frequencies, the limit and the margin of compliance.
Numbers with a minus sign are below the limit.
The TRACER was terminated into a Flat Panel 6dBi Antenna (Cushcraft, M/N: S2406P) at the end of a 1.5
meter coaxial cable connected to the RF output port of the Monitored Protection Switch.

Figure 6: Radiated Spurious Emissions, 1000 - 22000 MHz

Company: ADTRAN, Inc Tested by: Jeremy O. Pickens
Model: Tracer MPS Location: Duluth
Project No.: 3018370 Detector: HP8566
Date: 01/25/02 Antenna: EMCO3115
Standard: FCC Part 15 PreAmp: Hp1-26g
Class: A Group: None Cable(s): CABLETW3 hs_7000_sma_n
Notes: 1 Watt RFC Distance: 3

Ant. Antenna Cable Pre-amp Attenuator
Pol. Frequency Reading Factor Loss Factor Factor Net Limit Margin
(V/H) MHz dB(uV) dB(1/m) dB dB dB dB(uV/m) dB(uV/m) dB
10dB Attenuator installed at preamplifier input
v 2319.000 41.9 30.2 5.6 37.1 10.6 51.3 54.0 -2.7
h 2319.000 41.2 30.2 5.6 37.1 10.6 50.6 54.0 -3.4
h 2689.000 41.3 31.0 6.0 37.0 10.5 51.9 54.0 -2.1
v 2689.000 39.5 31.0 6.0 37.0 10.5 50.1 54.0 -3.9
Removed 10dB attenuator and inserted a 3GHz High Pass Filter
h 4268.000 37.8 34.0 8.2 36.3 0.4 44.2 54.0 -9.8
h 4916.000 40.8 34.9 8.9 36.5 0.5 48.5 54.0 -5.5
v 7252.000 34.4 37.8 10.8 36.5 0.4 46.8 54.0 -7.2
* No other emissions detected - Scanned to 25GHz.

TEST PERSONNEL:

Tester Signature

Jeremy O. Pickens / Senior Project Engineer
Typed/Printed Name

Date

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
18

A
3.6 AC Power Line-Conducted Emissions

For AC powered devices, line-conducted emissions testing is performed based on the requirements in
§15.207.

* The TRACER MPS was DC powered, and therefore, no line conducted testing was required.

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
21

A
3.7 Power Spectral Density
For direct sequence systems, the peak power spectral density conducted from the intentional radiator shall
not be greater than 8dBm in any 3 kHz band during any time interval of continuous transmission.

Figure 9 and Figure 10 show the power spectral density for Plans A and B. These measurements were made
with the antenna port of the TRACER directly connected to the spectrum analyzer.

For these measurements, the resolution bandwidth was set to 3 kHz, the span was set to 300 kHz, and the
sweep time was 100 seconds. The highest peak reading for Plan A was 0.2 dBm, and the highest peak
reading for Plan B was 0.2 dBm.

Figure 9: Power Spectral Density - Plan A

Tracer Monitor Protection Switch
Plan A - 1 Watt RFC
Power Spectral Density

10.0

5.0
Amplitude (dBm)

0

-5.0

-10.0
2.4250G 2.4253G
Frequency

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
22

A
Figure 10: Power Spectral Density – Plan B

Tracer Monitor Protection Switch
Plan B - 1 Watt RFC
Power Spectral Density

10.0

5.0
Amplitude (dBm)

0

-5.0

-10.0
2.46476G 2.46506G
Frequency

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
23

A
5.0 Test Equipment
Located below is a table outlining the test equipment used in this evaluation.

Description Make Model Serial #
EMI Receiver HP 85462A 3650A00362
RF Filter Selector HP 85460A 3704A00331
Spectrum Analyzer HP 8566B 2134A01032
RF Preselector HP 85685A 2602A00241
Q.P. Adapter HP 85650A 2412A00382
PreAmp HP 8449B 3008A0089
PreAmp HP 8447D 2237109
BiLog Antenna Chase 2622 CBL6112B
Horn Antenna EMCO 3115 9208-3919
Horn Antenna AH Systems SAS200/571 246
Antenna EMCO 3141 9508-4166
Antenna CDI B100 685
Active Loop Antenna EMCO 6507 9204-1283
Absorbing Clamp Fischer F-201 161
Cable Huber-Suhner HS1700N-SMA NA
Cable Huber-Suhner HS7000N-SMA NA

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9
25

A

EXHIBIT 1: RF Block Diagram

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9

A

EXHIBIT 2: Equipment Photographs

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9

A

EXHIBIT 3: Schematics

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9

A

EXHIBIT 4: Label Information and Location

ADTRAN, Inc.
M/N: 1280300L1
FCC ID: HDCTRACERL9

Document Created: 2002-04-30 15:36:40
Document Modified: 2002-04-30 15:36:40

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