User's Manual

b) The testing should check for emissions that may occur due to the intermixing of emissions with
the other transmitters, digital circuity, 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.
7. Additional testing, Part 15 subpart B disclaimer
The final host/module combination must 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. For host products
including a 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 Sections 15.33(b)(1), whichever is the higher frequency range of investigation.
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 50 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 cases, this would need to enable
activity on the communication BUS (i.e., PCIe, SDIO, USB) to ensure the unintentional radiator circuitry is
enabled. Testing laboratories may need to add attenuation or filters depending on the signal strength of
any active beacons (if applicable) from the enabled radio(s). See ANSI C63.4, ANSI C63.10, and ANSI
C63.26 for further general testing details.
The product under test is set into a link/association with a partnering device, as per the normal intended
use of the product. To ease testing, the product under test is set to transmit at a high duty cycle, such as
by sending a file or streaming some media content.
8. FCC Warning
Any changes or modifications not expressly approved by the party responsible for compliance could void
the user’s authority to operate the equipment. 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.