UDX-60025010_Attestation of Power Conformity

FCC ID: UDX-60025010

Attestation Statements

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FCCID_2073218

Cisco Meraki 500 Terry A Francois Blvd. 4‘" Floor ND San Francisco, CA 94158 ‘af L.3 al a| T 415.432.1000 F 415.632.5899 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 Subject: Letter of Attestation FCC ID: UDX—60025010 Model: MR34—HW We, Cisco Systems, Inc. declare this equipment has power reduction ability and channel selection/operation algorithms to comply with FCC rules when radio 1 and radio 2 transmit simultaneously in 2.4GHz mode. The Meraki MR34 (MR34—HW) wireless access point firmware will take the following actions to ensure RF compliance within FCC regulations: (a) Take corrective measure by reducing power on "Radio 1" in the 2.4GHz band by as required (~3 dB) during concurrent same—channel transmission of "Radio 1" and "Radio 2". The power chart / reduction requirement can be seen below. Power reduction is only required in channels 1 and 11 (3 and 9 in HT4O0 mode). In center channels of the 2.4Ghz band, Radio 1 and Radio 2 combine at full power with no violation of FCC regulations. See the "simultaneous operation" lab report for more details. (b) Rely on an algorithm coded in our firmware to eliminate servicing 802.11 clients on the Radio 1. Thus there will be no broadcasting of SSID or timer—based beacon frames. This will preclude the need for action (a) described above in all known operational cases. (c) Power reduction settings are not customer adjustable. Tools exist for customer configuration via Meraki Dashboard to reduce the power beyond the required reduction. Please see other attestation/filing documents related to SDR and radio configuration control /country setting for more information. Radio 1‘s primary function is as a scanning radio. It has rare to occasional transmissions. Meraki Access Point firmware is optimized by design to eliminate simultaneous same—band transmission, as it would be detrimental to Radio 2 function. However, we have implemented the necessary power reduction actions should simultaneous same—band transmission occur.

As soon as Radio 1 enters the same channel as Radio 2 (which operates continuously in a single stable channel) power reduction occurs. All transmissions while Radio 1 is in the same channel as radio 2 are power reduced, enforced as soon as the channel is set. If Radio 2 channel is changed, a similar check and Radio 1 power level check/reset occurs. All checks and power levels are set before first transmissions by Radio 1 in a new frequency. Data from test report, including simultaneous operation tests: Maximum Power of Radio 1 for individual operation: 802.11b FREQUENCY AVERAGE CHANNEL (MHz) POWER (dBm) 1 2412 18.79 6 2437 22.01 11 2462 16.93 802.11g FREQUENCY AVERAGE SHANNE: (MHz) POWER (dBm) 1 2412 10.78 6 2437 18.37 11 2462 13.12 802.11n (HT20) FREQUENCY AVERAGE CHANNEL (MHz) POWER (dBm) 1 2412 11.15 6 2437 18.89 11 2462 12.41 802.11n (HT40) FREQUENCY AVERAGE CHANNEL (MHz) POWER (dBm) 2422 7.94 2437 10.01 2452 7.51

During simultaneous transmission, the following channels are reduced in power (Radio 1 only). These are the only channels possible in Firmware for simultaneous operation that require power adjustment. 80211b CHANNEL FREQUENCY AVERAGE (MHz) POWER (dBm) 1 2412 15.79 11 2462 13.93 802.11g FREQUENCY AVERAGE CHANNES mible) POWER (dBm) 1 2412 7.78 11 2462 10.12 802.11n (HT20) FREeQuENCY AvERAGE CHANNEL— iminiz) POWER (dBmp 1 2412 8.15 11 2462 9.41 802.11n (HT40) FREQUENCY AVERAGE CPANNE—! imHiz) POWER (4Bmp 3 2422 4.94 9 2452 4.51 Sincerely, Benjamin Calderon / Vice President, Operations and Hardware TEL: 415—432—1000 FAX: 415—632—5899 E—mail: compliance@meraki.com


Document Created: 2019-11-12 03:31:01
Document Modified: 2019-11-12 03:31:01
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