Integration Instructions

Date: 25 January 2021
FCC MODULAR INTEGRATION INSTRUCTIONS | FCC ID: 2AD9E-BTM
JL Audio QCC5124 Module
FCC ID: 2AD9E-BTM
IC: 25930-BTM
1.0 INTRODUCTION
The purpose of this document is to provide guidance on certifying a modular transmitter (module)
and the key elements to be reviewed by a Telecommunication Certification Body (TCB) during
the certification process. This guidance includes:
• the integration instructions to be provided by a grantee (applicant) to a host manufacturer;
• a list of key elements to be reviewed by a TCB during the certification process; and
• guidance for grant comments to be included on the grant of certification.
2.0 INTEGRATION INSTRUCTIONS
2.1 General
Sections 2.2 through 2.10 describe the items that must be provided in the integration instructions
for host product manufacturers to use when integrating a module in a host product.
2.2 List of applicable FCC rules
JL Audio, Model Number, FCC ID: 2AD9E-BTM is seeking modular approval. The radio meets
the requirements for modular approval as detailed in FCC 15.247, RSS-247. Compliance to each
of the requirements is described below:
Frequency Hopping – BT Classic and EDR
This device can operate as a Frequency Hopping Spread Spectrum Device (FHSS) The frequency
range is 2402 MHz to 2483.5 MHz. Hopping frequencies are separated by 1MHz within 20dB.
There are 79 hopping frequencies. Frequency slots are selected by a pseudo-random sequence and
each slot is used, on average, an equal amount. Slots are used for 625 microseconds and the
specification allows for multi-slot packets up to five slots in length before hopping again. The
longest occupancy of a single channel is thus 3.125 milliseconds. The sequence is seeded by the
Bluetooth clock and the Bluetooth BD_Address, a unique ID on a unit-by-unit basis. This unit
cannot coordinate with other FHSS units.
DTS – Direct Sequence Spread Spectrum – BT Low Energy
This device can also operate as a DTS device. The frequency range is the same as in FHSS mode.
BT LE has forty 2MHz channels. Data is transmitted using Gaussian frequency shift modulation.
The device advertises on channels 37 (2402 MHZ), 38 (2426 MHz), and 39 (2480 MHz). The
other channels are available for the remainder of data transmission purposes. The device
advertises alternating between the three advertising channels. The device exchanges a channel
map with its partner, and they select their preferred channel for further communications. A new
channel is selected with each pairing event.