Positive Grid BT-4 User manual

Rev. No 2.0
FCC Part 15
EMI TEST REPORT
of
E.U.T. : BT-4 Pedal
Model : BT-4
FCC ID : 2AF4U022004001
for
APPLICANT : Positive Grid Digital Technology Co., Ltd.
ADDRESS : 10F., No.27-7, Yunong Rd., East Dist., Tainan
City 70164, 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: [email protected]
Report Number : 15-10-RBF-004-03

ETC Report No. : 15-10-RBF-004-03 FCC ID: 2AF4U022004001
Rev. No 1.0
TEST REPORT CERTIFICATION
Applicant :
Positive Grid Digital Technology Co., Ltd.
10F., No.27-7, Yunong Rd., East Dist., Tainan City 70164, Taiwan
Manufacturer :
Positive Grid Digital Technology Co., Ltd.
10F., No.27-7, Yunong Rd., East Dist., Tainan City 70164, Taiwan
Description of EUT
a) Type of EUT : BT-4 Pedal
b) Trade Name :
PositiveGrid
c) Model No. :
BT-4
d) Power Supply : Battery DC 1.5V*2pcs
Regulation Applied : FCC Rules and Regulations Part 15 Subpart C
I HEREBY CERTIFY THAT: The data shown in this report were made in accordance with the
procedures given in ANSI C63.10-2009, 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 N/A
Emission Bandwidth Pass
Output Power Pass
100 kHz Bandwidth of Band Edges Pass
Power Density Pass
Out-of-Band Conducted Emission Pass
Duty Cycle N/A

ETC Report No. : 15-10-RBF-004-03 FCC ID: 2AF4U022004001
Rev. No 1.0
Date Test Item Received : Oct. 05, 2015
Date Test Campaign Completed : Oct. 13, 2015
Date of Issue : Nov. 30, 2015
Test Engineer :
(
Vincent Chang , Engineer )
Approve & Authorized Signer :
Shang-Sheng Liou, Section Manager
EMC Dept. II of ELECTRONICS
TESTING CENTER, TAIWAN

ETC Report No. : 15-10-RBF-004-03 FCC ID: 2AF4U022004001
Rev. No 1.0
Table of Contents Page
1GENERAL INFORMATION.......................................................................................................1
1.1 Product Description...................................................................................................................... 1
1.2 Characteristics of Device ............................................................................................................. 1
1.3 Test Methodology ........................................................................................................................ 1
1.4 Test Facility.................................................................................................................................. 1
2PROVISIONS APPLICABLE......................................................................................................2
2.1 Definition ..................................................................................................................................... 2
2.2 Requirement for Compliance ....................................................................................................... 3
2.3 Restricted Bands of Operation ..................................................................................................... 5
2.4 Labeling Requirement.................................................................................................................. 5
2.5 User Information .......................................................................................................................... 6
3. SYSTEM TEST CONFIGURATION..........................................................................................7
3.1 Justification .................................................................................................................................. 7
3.2 Devices for Tested System........................................................................................................... 7
4RADIATED EMISSION MEASUREMENT ..............................................................................8
4.1 Applicable Standard..................................................................................................................... 8
4.2 Measurement Procedure............................................................................................................... 8
4.3 Measuring Instrument ................................................................................................................ 10
4.4 Radiated Emission Data ............................................................................................................. 11
4.5 Field Strength Calculation ......................................................................................................... 17
4.6 Photos of Radiation Measuring Setup........................................................................................ 18
5CONDUCTED EMISSION MEASUREMENT........................................................................ 20
5.1 Description ................................................................................................................................. 20
6ANTENNA REQUIREMENT.................................................................................................... 21
6.1 Standard Applicable................................................................................................................... 21
6.2 Antenna Construction and Directional Gain.............................................................................. 21
7EMISSION BANDWIDTH MEASUREMENT......................................................................... 22
7.1 Standard Applicable................................................................................................................... 22
7.2 Measurement Procedure............................................................................................................. 22
7.3 Measurement Equipment ........................................................................................................... 22
7.4 Measurement Data ..................................................................................................................... 23
8OUTPUT POWER MEASUREMENT......................................................................................27
8.1 Standard Applicable................................................................................................................... 27
8.2 Measurement Procedure............................................................................................................. 27

ETC Report No. : 15-10-RBF-004-03 FCC ID: 2AF4U022004001
Rev. No 1.0
8.3 Measurement Equipment ........................................................................................................... 27
8.4 Measurement Data ..................................................................................................................... 28
9100 KHZ BANDWIDTH OF BAND EDGES MEASUREMENT.............................................29
9.1 Standard Applicable................................................................................................................... 29
9.2 Measurement Procedure............................................................................................................. 29
9.3 Measurement Equipment ........................................................................................................... 29
9.4 Measurement Data ..................................................................................................................... 30
10 POWER DENSITY MEASUREMENT...................................................................................33
10.1 Standard Applicable................................................................................................................. 33
10.2 Measurement Procedure........................................................................................................... 33
10.3 Measurement Equipment ......................................................................................................... 33
10.4 Measurement Data ................................................................................................................... 34
11. OUT-OF-BAND CONDUCTED EMISSION MEASUREMENT........................................ 38
11.1 Standard Applicable................................................................................................................. 38
11.2 Measurement Procedure........................................................................................................... 38
11.3 Measurement Equipment ......................................................................................................... 38
11.4 Measurement Data ................................................................................................................... 39
12. DYTY CYCLE.......................................................................................................................... 46
12.1 Standard Applicable................................................................................................................. 46
12.2 Measurement Equipment ......................................................................................................... 46
12.3 Measurement Data ................................................................................................................... 46

ETC Report No. : 15-10-RBF-004-03 FCC ID: 2AF4U022004001
Sheet 1 of 46 Sheets
Rev. No 2.0
1 GENERAL INFORMATION
1.1 Product Description
a) Type of EUT : BT-4 Pedal
b) Trade Name : PositiveGrid
c) Model No. : BT-4
d) Power Supply : Battery DC1.5V*2pcs
1.2 Characteristics of Device
The product is a BT-4 Pedal.
1. Turn on the power of BT Pedal
2. Turn on Bluetooth on iOS device to connect with BT Pedal
3. Tap on the Message Name to configure, or select the quick presets from the header
1.3 Test Methodology
Both conducted and radiated emissions were performed according to the procedures
illustrated in ANSI C63.10-2009. Other required measurements were illustrated in separate
sections of this test report for details. For RF test the measurement procedure was refered to
FCC KDB 558074 D01 DTS Meas Guidance v03r03.
Instead of 0.8m EUT height above 1GHz, 1.5m was allowed by FCC December 2014 TCB
Conference call.
The EUT set for test with the continuous transmission mode and the duty cycle >98%.
Measueement Software
Software Version Note
e3 Version 6.100618b Radiated Emission Test
e3 Version 6.100421 Conducted Emission Test
1.4 Test Facility
The open area test site and conducted measurement facility used to collect the radiated data
is located on the roof top of Building at No.34, Lin 5, Dingfu Vil., Linkou Dist., New
Taipei City, Taiwan 24442, R.O.C.
This site is FCC 2.948 listed and accepted in a letter dated Jan. 29, 2014.
Registration Number: 90589

ETC Report No. : 15-10-RBF-004-03 FCC ID: 2AF4U022004001
Sheet 2 of 46 Sheets
Rev. No 2.0
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. : 15-10-RBF-004-03 FCC ID: 2AF4U022004001
Sheet 3 of 46 Sheets
Rev. No 2.0
2.2 Requirement for Compliance
(1) Conducted Emission Requirement
Except for Class A digital devices, for equpment 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 30MHz
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 band
edges.
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
(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. : 15-10-RBF-004-03 FCC ID: 2AF4U022004001
Sheet 4 of 46 Sheets
Rev. No 2.0
(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) Bandwidth Requirement
For direct sequence system, according to 15.247(a)(2), the minimum 6dB bandwidth shall
be at least 500 kHz.
(5) Output Power Requirement
For direct sequence system, according to 15.247(b), the maximum peak output power of
the transmitter shall not exceed 1 Watt. If transmitting antennas of directional gain greater
than 6 dBi are used, the power shall be reduced by the amount in dB that the directional
gain of the antenna exceeds 6 dBi.
(6) 100 kHz Bandwidth of Frequency Band Edges Requirement
According to 15.247(c), if any 100 kHz bandwidth outside these frequency bands, 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.
(7) Power Density Requirement
According to 15.247(d), for direct sequence systems, the transmitted power density
averaged over any 1 second interval shall not be greater than 8 dBm in any 3 kHz
bandwidth within these bands.

ETC Report No. : 15-10-RBF-004-03 FCC ID: 2AF4U022004001
Sheet 5 of 46 Sheets
Rev. No 2.0
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
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.