CAROL BTM-311VH User manual

Rev. No 1.0
FCC Part 15
EMI TEST REPORT
of
E.U.T. : Bluetooth Amplifier
Model No. : BTM-311VH
Serial Model : BTM-311RH、BTM-311R
FCC ID : G4RBTM-311VH
for
APPLICANT : TAIWAN CAROL ELECTRONICS CO .,LTD.
ADDRESS : NO.202.TUNG KUANG
ROAD.TAICHUNG,TAIWAN.
Test Performed by
ELECTRONICS TESTING CENTER, TAIWAN
NO. 34. LIN 5, DINGFU VIL., LINKOU DIST.,
NEW TAIPEI CITY, TAIWAN, 24442, R.O.C.
Tel:[phone] Fax:[phone]
http://www.etc.org.tw ; e-mail : em[email protected]
Report Number : 20-02-RBF-008-01

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Rev. No 1.0
TEST REPORT CERTIFICATION
Applicant : TAIWAN CAROL ELECTRONICS CO .,LTD.
NO.202.TUNG KUANG ROAD.TAICHUNG, TAIWAN.
Manufacture : TAIWAN CAROL ELECTRONICS CO .,LTD.
NO.202.TUNG KUANG ROAD.TAICHUNG, TAIWAN.
Description of Device :
a) Type of EUT :
Bluetooth Amplifier
b) Trade Name :
CAROL
c) Model No. :
BTM-311VH
d) Serial Model :
BTM-311RH、BTM-311R
e) Power Supply : AC ADAPTER Model: EA10683V-240
I/P:AC 100-240V , 2.0A , 50-60Hz
O/P:DC24V , 3A
f) Frequency Range : 2402 – 2480 MHz
Regulation Applied : FCC Rules and RegulatiAons Part 15 Subpart C
I HEREBY CERTIFY THAT: The data shown in this report were made in accordance with the
procedures given in ANSI C63.10-2013, and the energy emitted by the device was founded to be
within the limits applicable. I assume full responsibility for accuracy and completeness of these
data.
Note: 1. The result of the testing report relate only to the item tested.
2. The testing report shall not be reproduced expect in full, without the written approval of
ETC.
Summary of Tests
Test Results
Radiated Emission Pass
Conducted Emission Pass
Hopping Channel Separation Pass
Number of Hopping frequencies used Pass
Hopping Channel Bandwidth Pass
Dwell Time of each frequency Pass
Output Power Requirement Pass
100 kHz Bandwidth of Frequency Band Edges Requirement Pass
Out-of-Band Conducted Emission Requirement Pass
Duty Cycle N.A.

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Rev. No 1.0
Table of Contents Page
1 GENERAL INFORMATION....................................................................................................... 1
1.1 Product Description...................................................................................................................... 1
1.2 Test Methodology ........................................................................................................................ 1
1.3 Test Facility.................................................................................................................................. 1
2 PROVISIONS APPLICABLE...................................................................................................... 2
2.1 Definition ..................................................................................................................................... 2
2.2 Requirement for Compliance ....................................................................................................... 3
2.3 Restricted Bands of Operation ..................................................................................................... 5
2.4 Labeling Requirement .................................................................................................................. 6
2.5 User Information .......................................................................................................................... 6
3 SYSTEM TEST CONFIGURATION .......................................................................................... 7
3.1 Justification .................................................................................................................................. 7
3.2 Devices for Tested System........................................................................................................... 8
4 RADIATED EMISSION MEASUREMENT ............................................................................ 11
4.1 Applicable Standard ................................................................................................................... 11
4.2 Measurement Procedure............................................................................................................. 11
4.3 Measuring Instrument ................................................................................................................ 13
4.4 Radiated Emission Data ............................................................................................................. 14
4.5 Field Strength Calculation.......................................................................................................... 50
4.6 Photos of Radiation Measuring Setup........................................................................................ 51
5 CONDUCTED EMISSION MEASUREMENT........................................................................ 57
5.1 Standard Applicable ................................................................................................................... 57
5.2 Measurement Procedure............................................................................................................. 57
5.3 Conducted Emission Data .......................................................................................................... 58
5.4 Result Data Calculation.............................................................................................................. 64
5.5 Conducted Measurement Equipment ......................................................................................... 64
5.6 Photos of Conduction Measuring Setup..................................................................................... 65
6 ANTENNA REQUIREMENT .................................................................................................... 68
6.1 Standard Applicable ................................................................................................................... 68
6.2 Antenna Construction................................................................................................................. 68
7 HOPPING CHANNEL SEPARATION..................................................................................... 69
7.1 Standard Applicable ................................................................................................................... 69
7.2 Measurement Procedure............................................................................................................. 69
7.3 Measurement Equipment ........................................................................................................... 70
7.4 Measurement Data ..................................................................................................................... 70

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Rev. No 1.0
8 NUMBER OF HOPPING FREQUENCY USED ...................................................................... 75
8.1 Standard Applicable ................................................................................................................... 75
8.2 Measurement Procedure............................................................................................................. 75
8.3 Measurement Equipment ........................................................................................................... 75
8.4 Measurement Data ..................................................................................................................... 76
9 CHANNEL BANDWIDTH......................................................................................................... 81
9.1 Standard Applicable ................................................................................................................... 81
9.2 Measurement Procedure............................................................................................................. 81
9.3 Measurement Equipment ........................................................................................................... 82
9.4 Measurement Data ..................................................................................................................... 82
10 DWELL TIME ON EACH CHANNEL................................................................................... 87
10.1 Standard Applicable ................................................................................................................. 87
10.2 Measurement Procedure........................................................................................................... 87
10.3 Measurement Equipment ......................................................................................................... 87
10.4 Measurement Data ................................................................................................................... 88
11 OUTPUT POWER MEASUREMENT.................................................................................. 102
11.1 Standard Applicable ............................................................................................................... 102
11.2 Measurement Procedure......................................................................................................... 102
11.3 Measurement Equipment ....................................................................................................... 102
11.4 Measurement Data ................................................................................................................. 103
12 100 K H Z BANDWIDTH OF BAND EDGES MEASUREMENT......................................... 108
12.1 Standard Applicable ............................................................................................................... 108
12.2 Measurement Procedure......................................................................................................... 108
12.3 Measurement Equipment ....................................................................................................... 109
12.4 Measurement Data ................................................................................................................. 109
13 CONDUCTED SPURIOUS EMISSION MEASUREMENT............................................... 114
13.1 Standard Applicable ............................................................................................................... 114
13.2 Measurement Procedure......................................................................................................... 114
13.3 Measurement Equipment ....................................................................................................... 115
13.4 Measurement Data ................................................................................................................. 115
14. DUTY CYCLE ........................................................................................................................ 122
14.1 Standard Applicable ............................................................................................................... 122
14.2 Measurement Equipment ....................................................................................................... 122
14.3 Measurement Data ................................................................................................................. 122

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 1 of 128 Sheets
Rev. No 2.1
1 GENERAL INFORMATION
1.1 Product Description
a) Type of EUT :
Bluetooth Amplifier
b) Trade Name :
CAROL
c) Model No. :
BTM-311VH
d) Serial Model :
BTM-311RH、BTM-311R
e) Power Supply : AC ADAPTER Model: EA10683V-240
I/P:AC 100-240V , 2.0A , 50-60Hz
O/P:DC 24V , 3A
f) Frequency Range : 2402 – 2480 MHz
1.2 Test Methodology
Both conducted and radiated emissions were performed according to the procedures
illustrated in ANSI C63.10-2013. Other required measurements were illustrated in separate
sections of this test report for details.
Measueement Software
Software Version Note
e3 Version 6.100618f Radiated Emission Test
e3 Version 6.100421 Conducted Emission Test
1.3 Test Facility
Location of the Test site: No.34, Lin 5, Dingfu Vil., Linkou Dist., New Taipei City, Taiwan
24442, R.O.C.
Designation Number: TW2628.

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 2 of 128 Sheets
Rev. No 2.1
2 PROVISIONS APPLICABLE
2.1 Definition
Unintentional radiator:
A device that intentionally generates and radio frequency energy for use within the device, or
that sends radio frequency signals by conduction to associated equipment via connecting
wiring, but which is not intended to emit RF energy by radiation or induction.
Class A Digital Device:
A digital device which is marketed for use in commercial or business environment; exclusive
of a device which is market for use by the general public, or which is intended to be used in
the home.
Class B Digital Device :
A digital device which is marketed for use in a residential environment notwithstanding use
in a commercial, business of industrial environment. Example of such devices that are
marketed for the general public.
Note : A manufacturer may also qualify a device intended to be marketed in a commercial,
business, or industrial environment as a Class B digital device, and in fact is
encouraged to do so, provided the device complies with the technical specifications
for a Class B Digital Device. In the event that a particular type of device has been
found to repeatedly cause harmful interference to radio communications, the
Commission may classify such a digital device as a Class B Digital Device,
Regardless of its intended use.
Intentional radiator:
A device that intentionally generates and emits radio frequency energy by radiation or
induction.

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 3 of 128 Sheets
Rev. No 2.1
2.2 Requirement for Compliance
(1) Conducted Emission Requirement
Except as shown in paragraphs (b) and (c) of this section, for an intentional radiator
that is designed to be connected to the public utility (AC) power line, the radio
frequency voltage that is conducted back onto the AC power line on any frequency or
frequencies within the band 150kHz to 30 MHz shall not exceed the limits in the
following table, as measured using a 50µH/50 ohms line impedance stabilization
network (LISN). Compliance with the provisions of this paragraph shall be based on
the measurement of the radio frequency voltage between each power line and ground at
the power terminal. The lower limit applies at the boundary between the frequency
ranges.
Frequency
MHz
Quasi Peak
dBµV
Average
dBµV
0.15 - 0.5 66-56* 56-46*
0.5 - 5.0 56 46
5.0 - 30.0 60 50
* Decreases with the logarithm of the frequency
For intentional device, according to §15.207(a) Line Conducted Emission Limits is
same as above table.
(2) Radiated Emission Requirement
For unintentional device, according to §15.109(a), except for Class A digital devices, the
field strength of radiated emissions from unintentional radiators at a distance of 3 meters
shall not exceed the following values:
Frequency
MHz
Distance
Meters
Radiated
dBµV/m
Radiated
µV/m
30 - 88 3 40.0 100
88 - 216 3 43.5 150
216 - 960 3 46.0 200
Above 960 3 54.0 500
For intentional device, according to §15.209(a), the general requirement of field strength
of radiated emissions from intentional radiators at a distance of 3 meters shall not exceed
the above table.

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 4 of 128 Sheets
Rev. No 2.1
(3) Antenna Requirement
For intentional device, according to §15.203, an intentional radiator shall be designed to
ensure that no antenna other than that furnished by the responsible party shall be used
with the device.
(4) Hopping Channel Separation
According to 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. Alternatively, frequency hopping systems
operating in the 2400-2483.5 MHz band may have hopping channel carrier frequencies
that are separated by 25 kHz or two-thirds of the 20 dB bandwidth of the hopping
channel, whichever is greater, provided the systems operate with an output power no
greater than 125 mW.
(5) Number of Hopping frequencies used
According to 15.247(a)(1)(iii), frequency hopping systems in the 2400–2483.5 MHz
band shall use at least 15 channels.
(6) Hopping Channel Bandwidth
For frequency hopping system operating in the 2400–2483.5 MHz band, there is no
requirement for the maximum 20dB bandwidth of the hopping channel. The
measurement of the hopping channel bandwidth is for the reference of the hopping
channel separation requirement.
(7) Dwell Time of each frequency
According to 15.247(a)(1)(iii), for frequency hopping system operating in the 2400-
2483.5 band, the average time of occupancy on any channel shall not be greater than 0.4
seconds within a period of 0.4 seconds multiplied by the number of hopping channels
employed.
(8) Output Power Requirement
According to 15.247(b)(1), for frequency hopping systems operating in the 2400–2483.5
MHz band employing at least 75 non-overlapping hopping channels, and all frequency
hopping systems in the 5725–5850 MHz band: 1 watt. For all other frequency hopping
systems in the 2400–2483.5 MHz band: 0.125 watts.
(9) 100 kHz Bandwidth of Frequency Band Edges Requirement
According to 15.247(d), in any 100 kHz bandwidth outside the frequency band in which
the spread spectrum or digitally modulated intentional radiator is operating, the radio
frequency power that is produced by the intentional radiator shall be at least 20 dB below
that in the 100 kHz bandwidth within the band that contains the highest level of the
desired power, based on either an RF conducted or a radiated measurement, provided the

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 5 of 128 Sheets
Rev. No 2.1
transmitter demonstrates compliance with the peak conducted power limits. If the
transmitter complies with the conducted power limits based on the use of RMS
averaging over a time interval, as permitted under paragraph (b)(3) of this section, the
attenuation required under this paragraph shall be 30 dB instead of 20 dB. Attenuation
below the general limits specified in §15.209(a) is not required.
(10) Out-of-Band Conducted Emission Requirement
According to 15.247(d), in any 100 kHz bandwidth outside the frequency band in which
the spread spectrum or digitally modulated intentional radiator is operating, the radio
frequency power that is produced by the intentional radiator shall be at least 20 dB below
that in the 100 kHz bandwidth within the band that contains the highest level of the
desired power, based on either an RF conducted or a radiated measurement, provided the
transmitter demonstrates compliance with the peak conducted power limits. If the
transmitter complies with the conducted power limits based on the use of RMS
averaging over a time interval, as permitted under paragraph (b)(3) of this section, the
attenuation required under this paragraph shall be 30 dB instead of 20 dB. Attenuation
below the general limits specified in §15.209(a) is not required.
2.3 Restricted Bands of Operation
Only spurious emissions are permitted in any of the frequency bands listed below :
MHz MHz MHz GHz
0.090 - 0.110 16.42-16.423 399.9-410 4.5-5.15
0.495 - 0.505 ** 16.69475 - 16.69525 608-614 5.35-5.46
2.1735 - 2.1905 16.80425 - 16.80475 960-1240 7.25-7.75
4.125-4.128 25.5-25.67 1300-1427 8.025-8.5
4.17725-4.17775 37.5-38.25 1435-1626.5 9.0-9.2
4.20725-4.20775 73-74.6 1645.5-1646.5 9.3-9.5
6.215-6.218 74.8-75.2 1660-1710 10.6-12.7
6.26775-6.26825 108-121.94 1718.8-1722.2 13.25-13.4
6.31175-6.31225 123-138 2200-2300 14.47-14.5
8.291-8.294 149.9-150.05 2310-2390 15.35-16.2
8.362-8.366 156.52475 - 156.52525 2483.5-2500 17.7-21.4
8.37625-8.38675 156.7-156.9 2655-2900 22.01-23.12
8.41425-8.41475 162.0125-167.17 3260-3267 23.6-24.0
12.29-12.293 167.72-173.2 3332-3339 31.2-31.8
12.51975-12.52025 240-285 3345.8-3358 36.43-36.5
12.57675-12.57725 322-335.4 3360-4400 Above 38.6
13.36-13.41
** : Until February 1, 1999, this restricted band shall be 0.490-0.510 MHz

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 6 of 128 Sheets
Rev. No 2.1
2.4 Labeling Requirement
The device shall bear the following statement in a conspicuous location on the device :
This device complies with part 15 of the FCC Rules. Operation is subject to the following
two conditions : (1) This device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired operation.
2.5 User Information
The users manual or instruction manual for an intentional or unintentional radiator shall
caution the user that changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate the equipment.
For a Class B digital device or peripheral, the instructions furnished the user shall include the
following or similar statement, placed in a prominent location in the text of the manual.
The Federal Communications Commission Radio Frequency Interference Statement includes
the following paragraph.
This equipment has been tested and found to comply with the limits for a Class B Digital
Device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction may cause harmful interference to radio
communication. However, there is no guarantee that interference will not occur in a
particular installation.
If this equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
-- Consult the dealer or an experienced radio / TV technician for help.

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 7 of 128 Sheets
Rev. No 2.1
3 SYSTEM TEST CONFIGURATION
3.1 Justification
For both radiated and conducted emissions below 1 GHz, the system was configured for
testing in a typical fashion as a customer would normally use it. The peripherals other than
EUT were connected in normally standing by situation. Measurement was performed under
the condition that a computer program was exercised to simulate data communication of EUT,
and the transmission rate was set to maximum allowed by EUT. Three highest emissions
were verified with varying placement of the transmitting antenna connected to EUT (if
applicable) to maximize the emission from EUT.
For conducted and radiated emissions, whichever RF channel is operated, the digital circuits’
function identically. As the reason, measurement of emissions from digital circuits is
performed with the highest, middle and the lowest channel by transmitting mode.
The following modes were invastegated and the worst cases (mode 1 and 3) were chosen for
final test.
1. Basic Rate (BR) 1 Mbps uses GFSK modulation
2. Enhanced Data Rate (EDR) 2Mbps uses pi/4-DQPSK modulation
3. Enhanced Data Rate (EDR) 3Mbps uses 8DPSK modulation

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 8 of 128 Sheets
Rev. No 2.1
3.2 Devices for Tested System
Device Manufacture Model / FCC ID. Description
* Bluetooth
Amplifier
TAIWAN CAROL
ELECTRONICS CO .,LTD.
BTM-311VH/
G4D-BTM-
311XXX
---
* AC ADAPTER EDACPOWER Electronics Co.,
Ltd
EA10683V-240 Power core1.3m.
1.3m Unshielded AC
ADAPTER Power Cord
Speaker TAIWAN CAROL
ELECTRONICS CO .,LTD.
PAS-218 Impedance:8Ω
2.4m Unshielded Cable
Speaker TAIWAN CAROL
ELECTRONICS CO .,LTD.
CS-101 Impedance:4Ω
1.3m Unshielded Cable
Speaker ------ ------- Impedance:8Ω/12W
0.6m Unshielded Cable
Microphone TAIWAN CAROL
ELECTRONICS CO .,LTD.
GS-77 φ6.3mm Mono,
4.5mUnshielded Cable
HDMI Cable TRANS ELECTRONICS
CO .,LTD.
HD2-1.2MX 1.3m Shielded Cable
Monitor ASUS MM17T 1.8m Unshielded AC Power
Cord
1.5m Male to Male.
Unshielded VGA Cable,
LCD TV SONY KDL-22EX420 1.6m Unshielded AC Power
Cord
Mobile Phone OPPO CPH1605 -----
3.5mm Audio Cable UGREEN 50366 1m Male to Male Audio Cable
laptop computer ACER TMP259M -----
Remark “*” means equipment under test.

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 9 of 128 Sheets
Rev. No 2.1
Device Manufacture Model / FCC ID. Description
* Bluetooth
Amplifier
TAIWAN CAROL
ELECTRONICS CO .,LTD.
BTM-311RH/
G4D-BTM-
311XXX
---
* AC ADAPTER EDACPOWER Electronics Co.,
Ltd
EA10683V-240 Power core1.3m.
1.3m Unshielded AC
ADAPTER Power Cord
Speaker TAIWAN CAROL
ELECTRONICS CO .,LTD.
PAS-218 Impedance:8Ω
2.4m Unshielded Cable
Speaker TAIWAN CAROL
ELECTRONICS CO .,LTD.
CS-101 Impedance:4Ω
1.3m Unshielded Cable
Speaker ------ ------- Impedance:8Ω/12W
0.6m Unshielded Cable
Microphone TAIWAN CAROL
ELECTRONICS CO .,LTD.
GS-77 φ6.3mm Mono,
4.5mUnshielded Cable
Video Cable Horng Jye Technology
Co .,LTD.
ARC-001 1m RCA Shielded Cable
LCD TV SONY KDL-22EX420 1.6m Unshielded AC Power
Cord
Mobile Phone OPPO CPH1605 -----
3.5mm Audio Cable UGREEN 50366 1m Male to Male Audio Cable
laptop computer ACER TMP259M -----
Remark “*” means equipment under test.

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 10 of 128 Sheets
Rev. No 2.1
Device Manufacture Model / FCC ID. Description
* Bluetooth
Amplifier
TAIWAN CAROL
ELECTRONICS CO .,LTD.
BTM-311R/
G4D-BTM-
311XXX
---
* AC ADAPTER EDACPOWER Electronics Co.,
Ltd
EA10683V-240 Power core1.3m.
1.3m Unshielded AC
ADAPTER Power Cord
Speaker TAIWAN CAROL
ELECTRONICS CO .,LTD.
PAS-218 Impedance:8Ω
2.4m Unshielded Cable
Speaker TAIWAN CAROL
ELECTRONICS CO .,LTD.
CS-101 Impedance:4Ω
1.3m Unshielded Cable
Speaker ------ ------- Impedance:8Ω/12W
0.6m Unshielded Cable
Microphone TAIWAN CAROL
ELECTRONICS CO .,LTD.
GS-77 φ6.3mm Mono, Cable450cm
3.5mm Audio Cable UGREEN 50366 1m Male to Male Audio Cable
Mobile Phone OPPO CPH1605 -----
Remark “*” means equipment under test.

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 11 of 128 Sheets
Rev. No 2.1
4 RADIATED EMISSION MEASUREMENT
4.1 Applicable Standard
For unintentional radiator, the radiated emission shall comply with §15.109(a).
For intentional radiators, according to §15.247 (a), operation under this provision is limited
to frequency hopping and direct sequence spread spectrum, and the out band emission shall
be comply with §15.247 (c)
4.2 Measurement Procedure
1. Setup the configuration per figure 1 and 2 for frequencies measured below and above 1
GHz respectively.
2. For emission frequencies measured below 1 GHz, a pre-scan is performed in a shielded
chamber to determine the accurate frequencies of higher emissions will be checked on a
open test site. As the same purpose, for emission frequencies measured above 1 GHz, a
pre-scan also be performed with a 1 meter measuring distance before final test.
3. For emission frequencies measured below and above 1 GHz, set the spectrum analyzer
on a 100 kHz and 1 MHz resolution bandwidth respectively for each frequency measured
in step 2.
4. The search antenna is to be raised and lowered over a range from 1 to 4 meters in
horizontally polarized orientation. Position the highness when the highest value is
indicated on spectrum analyzer, then change the orientation of EUT on test table over a
range from 0。to 360。with a speed as slow as possible, and keep the azimuth that
highest emission is indicated on the spectrum analyzer. Vary the antenna position again
and record the highest value as a final reading. A RF test receiver is also used to confirm
emissions measured.
5. Repeat step 4 until all frequencies need to be measured were complete.
6. Repeat step 5 with search antenna in vertical polarized orientations.
7. Check the three frequencies of highest emission with varying the placement of cables
associated with EUT to obtain the worse case and record the result.

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 12 of 128 Sheets
Rev. No 2.1
Figure 1 : Frequencies measured below 1 GHz configuration
RF Test
Receiver
Search
Antenna
3m
4m
1m
Turn
Table
EUT
0.8m
Antenna Tower
Ground Plane
Figure 2 : Frequencies measured above 1 GHz configuration
Sp ec tru m
An
a
lyze r
H or n An te nn a
3m
4m
1m
Tu r n
T a ble
EUT
An ten n
a
Tow e r
Ampli
f
ie r
1.5

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 13 of 128 Sheets
Rev. No 2.1
4.3 Measuring Instrument
The following instrument are used for radiated emissions measurement:
Equipment Manufacturer Model No. Calibration
Date
Next Cal. Date
Test Receiver Keysight N9038A 2019/11/21 2020/11/20
Bi-Log Antenna(30M-
1G) ETC & JYEBAO
MCTD 2786
& FAT-
NM5NF5T
3G2W6
2019/08/20 2020/08/19
Amplifier (30M-1G) HP 8447D 2019/10/04 2020/10/03
Horn Antenna (1-18G) EMCO 3117 2020/03/04 2021/03/03
Horn Antenna EMCO 3116 2019/11/26 2020/11/25
Amplifier HP 8449B 2019/10/04 2020/10/03
Amplifier HP 83051A 2019/09/02 2020/09/01
Measuring instrument setup in measured frequency band when specified detector function is
used :
Frequency Band
(MHz)
Instrument Function Resolution
bandwidth
Video
Bandwidth
30 to 1000 RF Test Receiver Quasi-Peak
120 kHz N/A
Spectrum Analyzer Peak 100 kHz 100 kHz
Above 1000 Spectrum Analyzer Peak 1 MHz 1 MHz
Spectrum Analyzer Average 1 MHz 10 Hz or
≥1/T
(Note 1)
Note 1:
VBW = 10 Hz, when the duty cycle is no less than 98%.
VBW ≥1/T, when duty cycle is less than 98% where T is the minimum transmission duration
over which the transmitter is on and is transmitting at its maximum power control level for the
tested mode of operation.

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 14 of 128 Sheets
Rev. No 2.1
4.4 Radiated Emission Data
4.4.1 Tx Portion
A. Bluetooth BR
Site :Chamber #2 Date :2020-03-20
Limit :FCC 1G TO 40G PEAK Ant. Pol. :HORIZONTAL
EUT :Bluetooth Amplifier Model :BTM-311VH
Power Rating :120Vac 60Hz Temp. :19°C
Engineer : HANK CHANG Humi. :65 %
Test Mode :BR
Test Mode :TX RX-LO 2402 - MI 2441 - HI 2480MHz
Freq
MHz
Reading
dBuV
Correction
Factor
dB
Result
dBuV/m
Limits
dBuV/m
Over limit
dB
Detector
4804.0000 44.14 4.07 48.21 74.00 -25.79 Peak
4882.0000 42.46 4.16 46.62 74.00 -27.38 Peak
4960.0000 42.27 4.25 46.52 74.00 -27.48 Peak
Note :
1. Result = Reading + Corrected Factor
2. Average Result = Peak Result + Duty Factor ( )
3. Corrected Factor = Antenna Factor + Cable Loss - Amplifier Gain (if any)
4. The margin value=Limit - Result
5. Above 1Ghz : Peak measurements are compared to the average limit - as peak
measurements are below the average limit, they also comply with the peak limit.

ETC Report No. : 20-02-RBF-008-01 FCC ID: G4RBTM-311VH
Sheet 15 of 128 Sheets
Rev. No 2.1
Site :Chamber #2 Date :2020-03-20
Limit :FCC 1G TO 40G PEAK Ant. Pol. :VERTICAL
EUT :Bluetooth Amplifier Model :BTM-311VH
Power Rating :120Vac 60Hz Temp. :19°C
Engineer : HANK CHANG Humi. :65%
Test Mode :BR
Test Mode :TX RX-LO 2402 - MI 2441 - HI 2480MHz
Freq
MHz
Reading
dBuV
Correction
Factor
dB
Result
dBuV/m
Limits
dBuV/m
Over limit
dB
Detector
4804.0000 43.88 4.07 47.95 74.00 -26.05 Peak
4882.0000 43.27 4.16 47.43 74.00 -26.57 Peak
4960.0000 42.54 4.25 46.79 74.00 -27.21 Peak
Note :
1. Result = Reading + Corrected Factor
2. Average Result = Peak Result + Duty Factor ( )
3. Corrected Factor = Antenna Factor + Cable Loss - Amplifier Gain (if any)
4. The margin value=Limit - Result
5. Above 1Ghz : Peak measurements are compared to the average limit - as peak
measurements are below the average limit, they also comply with the peak limit.