WJ Communications SX1115 Users Manual

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Thomas N. Cokenias EMC & Radio Type Approvals

Test & Consulting Services for Commercial, Military, International Compliance

P.O. Box 1086
El Granada, CA 94018

2 December

Greg:

Your questions and my responses

Tom

Re: FCC ID NTTSX1115
Applicant: Watkins Johnson Company
Correspondence Reference Number: 10902
731 Confirmation Number: EA95108
Date of Original E-Mail: 12/02/1999

Please address the following questions (given that the maximum proposed EIRP is
quite high, there is no way to avoid these issues).

1. The original antenna list has a 8 dBi antenna which has been changed

to a 18.5 dBi antenna in the revised antenna list; please clarify if
this is a replacement or addition.

ANS: The flat panel antenna gain is 18.5 dB. The 8 dBi entry is a typo.

2. The MPE info has a 22 dBi antenna, the uploaded antenna list has a 23 dBi 1­ft dish (the closest match), please clarify which is the correct one.

ANS: The Radio Waves model SP1-5.8 1 ft diameter antenna gain is 22 dBi. The 23 dBi
entry is a typo.

3. There is no antenna or other info for the 14 dBi antenna (Mobile Mark, SCR
14-5723). Please upload appropriate antenna info, photo if applicable, and
installation requirements for determining MPE compliance requirements.

ANS: Information has been uploaded. See 14dBispec.pdf

4. The uploaded installation instructions and requirements are CISCO procedures
for using this transceiver. Please provide Watkins Johnson's antenna
installation procedures and requirements for non-CISCO operations. The
applicant is proposing professional installation. Specific antenna installation
procedures and requirements for the 5 (or 6) antennas proposed in this filing
may be provided to the professional installers to ensure MPE compliance; if
applicable, please upload a copy of the specific installation instructions.
Instructions and/or warnings must indicate installer responsibility and
identifying the purpose of installation requirements is for FCC RF exposure
compliance.

ANS: Please disregard the Cisco draft manual previously submitted. The Cisco manual
currently addresses the MMDS ODU head and will require additional revisions to include

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the UNII transceiver. Instead, please refer to the WJ draft, with modified page 7
amendment.

5. Please address the following and revise info and/or appropriate manuals and
installation guides accordingly (both CISCO and Watkins Johnson if appropriate):

(a) The filing, as indicated on the EAS, is requesting for 316 mW (25 dBm). The
highest conducted output indicated in the MPE info is 27.8 dBm (603 mW). The
maximum conducted output indicated in the WARNING statement in the CISCO
installation manual is 33 dBi (should it be dBm ?), which is higher than those
requested and measured.

ANS: Please disregard the Cisco draft manual previously submitted. The Cisco manual
currently addresses the MMDS ODU head and will require additional revisions to include
the UNII transceiver The 33 dBm output refers to the MMDS band and is not applicable
to this UNII product. Maximum power for the UNII 6 MHz channel is 24.8 dBm, and
for 12 MHz channels the maximum allowed power is 27.8 dBm.

Please update the 731 form for NTTSX1115 to state 27.8 dBm, or 603 mW, as the
maximum power output from this product.

(b) The antenna gain and separation distance for compliance indicated on the
subsequent page (Table 6) of the CISCO manual only goes up to 30 dBi. This
filing is proposing to use antennas up to 34 dBi, please revise accordingly.

ANS: Please disregard the Cisco draft manual previously submitted. The Cisco manual
currently addresses the MMDS ODU head and will require additional revisions to include
the UNII transceiver. The antenna gains shown in Table 6 are for MMDS at an output
power of 33 dBm . The corresponding table for this UNII product is found on the
revised page 7 of the WJ installation instructions

The table reflects highest EIRP values allowed by Part 15 and are applicable to 12 MHz
channels. Power and EIRP for 6 MHz channels would be 3 dB lower.

This table will be reproduced on revised page 7 of the WJ instruction manual. The revised
page 7 is submitted as a separate attachment to this correspondence.

(c) Distances for both uncontrolled and controlled exposures are indicated in
Table 6. There is no explanation to the installer or user on which exposure
distances are applicable for what conditions. Note: unless professional
installers have been specifically trained on RF exposure requirements and know
how to satisfy controlled exposure limits, uncontrolled limits should be used.

ANS: Please disregard the Cisco draft manual previously submitted. The Cisco manual
currently addresses the MMDS ODU head and will require additional revisions to include
the UNII transceiver. The revised page 7 of the WJ draft installation manual will contain
Table 2 showing only uncontrolled exposure distances. Controlled exposure limits will
not be addressed, only uncontrolled exposure limits will be used.

(d) It is not clear if the minimum distances indicated in Table 6 for controlled
and uncontrolled exposure requirements are antenna installation requirements or
distances for persons to maintain. The WARNING statement indicates hazard may
exist, determine antenna gain and locate minimum acceptable distance; but there
is no RF exposure compliance requirements. It should indicated to users and

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