TCB Q and A

FCC ID: RRK-AWLL6080

Cover Letter(s)

Download: PDF

FCCID_817243

Page 1 of 3

Chris Harvey

From: vicky.liu [vicky.liu@tw.ccsemc.com]
Sent: Tuesday, July 10, 2007 10:01 PM
To: charvey-tcb@ccsemc.com
Cc: application@tw.ccsemc.com
Subject: Alpha Networks Inc., FCC ID: RRK-AWLL6080, Assessment NO.: AN07T6983, Notice#1
Attachments: AWLL6080_User Manual(960711).pdf; AWLL6080_Test Plots(960711).pdf

Dear Charvey,

Thank you for your reply and my answer is as belowing.

1.Please indicate whether this MIMO device operates as
a.A 2x2 Spatial Multiplexed MIMO
b.that drives each antenna incoherently
c.and whether the unit uses Cyclic Diversity.

Ans: a. You can find that the Ralink is a 2T3R device in page 1 of 2860 datasheet . The device supports 2
spatial streams .
b. Yes
c. Ralink chipset doesn't support Cyclic Diversity in 11b&g .

The answer is the same the AR680W (RRK-AR680W;AN07T6875)which you have already
reviewed before.

2. The Users Manual does not contain any RF Exposure statements required by FCC
15.247. This device is a USB Dongle that is categorized as a Portable RF Exposure
condition device. Please provide a revised Users Manual RF exposure statement to
address the portable nature of this device.

The following is a possible example of another approved CardBus MIMO Users Manual
RF Exposure statement:
"FCC Statement:
This device has been tested for compliance with FCC RF Exposure (SAR) limits in the
typical laptop computer configuration and this device can be used in desktop or
laptop computers with side mounted USB ports which can provide 2 cm separation
distance from the antenna to the body of the user or a nearby person. This device
cannot be used with handheld PDAs (personal digital assistants). This device and
its antenna must not be co-located or operated in conjunction with any other
antenna or transmitter."

Ans: Please find the attachment which is the user manual.

7/11/2007

Page 3 of 3

"FCC Statement:
This device has been tested for compliance with FCC RF Exposure (SAR) limits in the
typical laptop computer configuration and this device can be used in desktop or
laptop computers with side mounted USB ports which can provide 2 cm separation
distance from the antenna to the body of the user or a nearby person. This device
cannot be used with handheld PDAs (personal digital assistants). This device and
its antenna must not be co-located or operated in conjunction with any other
antenna or transmitter."

3. The SAR test report has photographs of a model DWA-140, which appears to be a
different device. The SAR test photos and test plots are for the model DWA-140 USB
device. Please confirm if these are incorrect photos and plots (and data) and
update the SAR test report and plots exhibits as needed.

The items indicated above must be submitted before processing can continue on the
above referenced application. Failure to provide the requested information within
30 days of the original e-mail date may result in application dismissal and
forfeiture of the filing fee. Also, please note that partial responses increase
processing time and should not be submitted. Any questions about the content of
this correspondence should be directed to the e-mail address listed below the name
of the sender.

Best regards,

Chris Harvey
Charvey-tcb@ccsemc.com

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7/11/2007

Document Created: 2007-07-11 05:45:58
Document Modified: 2007-07-11 05:45:58

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