Hardware Description

with the other transmitters， digital circuitry， or due to physical properties of the host product
(enclosure). This investigation is especially important when integrating multiple modular
transmitters where the certification is based on testing each of them in a stand-alone
configuration. It is important to note that host product manufacturers should not assume that
because the modular transmitter is certified that they do not have any responsibility for final
product compliance.
c) If the investigation indicates a compliance concern the host product manufacturer is
obligated to mitigate the issue. Host products using a modular transmitter are subject to
all the applicable individual technical rules as well as to the general conditions of
operation in Sections 15.5， 15.15， and 15.29 to not cause interference. The operator
of the host product will be obligated to stop operating the device until the interference
has been corrected
The WLT8761M module is
based on RTL8761BTV chip . For the testing module on
y
our product, user can refer to specification of the Bluetooth system on how to
configure and evaluate the module. This specification can also be found on the
official Bluetooth website:
https://www.bluetooth.org/en‐us/specification/adopted‐specifications.
Additional testing， Part 15 subpart B disclaimer
The final host / module combination need to be evaluated against the FCC Part 15B
criteria for unintentional radiators in order to be properly authorized for operation as a
Part 15 digital device .
The host integrator installing this module into their product must ensure that the final
composite product complies with the FCC requirements by a technical assessment or
evaluation to the FCC rules， including the transmitter operation and should refer to
guidance in KDB 996369.
Frequency spectrum to be investigated
For host products with certified modular transmitter， the frequency range of
investigation of the composite system is specified by rule in Sections 15.33(a)(1)
through (a)(3)， or the range applicable to the digital device， as shown in Section
15.33(b)(1)， whichever is the higher frequency range of investigation.
Operating the host product
When testing the host product， all the transmitters must be operating. The transmitters
can be enabled by using publicly-available drivers and turned on，so the transmitters
are active. In certain conditions it might be appropriate to use a technology-specific call
box (test set) where accessory devices or drivers are not available.
When testing for emissions from the unintentional radiator， the transmitter shall be
placed in the receive mode or idle mode， if possible. If receive mode only is not
possible then， the radio shall be passive (preferred) and/or active scanning. In these