Cover Letters

5787-EX-MR-1997 Text Documents

SOUTHWEST RESEARCH INSTITUTE

2000-06-02ELS_37523

SENT BY! i B—25—§7 i 14:50 i LEGAL DEPARTMENi~ £v4£0O1303i+®e ic sOoOUTHWEST RESEARCH INSTITUTE 8220 CULEBRAROAD e POST O(FICE DRAWER 28510 e SAN ANTONIO, TEXAS, USA 78228—0410 e (210) B84—5111 o TELEX 244846 August 25, 1997 Facsimile to: (202) 418—1918 Federal Communications Commission c/o Melion Bank Attn: Wholesale Lock Box Shift Supervisor 3 Mellon Bank Center 525 William Penn Way 27th Floor, Room 153—2713 Pittsburgh, PA 15259—0001 Attn: Mr. Carl Huie: Re: Formal Amendment File Number 5787—EX—MR—97 Dear Mr. Huie: Thank you for your telephone call to Monica Trollinger this date concerning the above referenced application. I hope the answers provided below will be helpful Question: Why can‘t frequencies be used in a shielded room? Answer: The equipment is too large for a shielded enclosure. These are whole vehicle tests. Some vehicles weigh 210,000 pounds. Question: How frequently are we going to be testing? Answer: Four or five times a year. Question: Is this a sweep type oftest? Answer: No, these are discrete frequency tests. Question: Why do we need so many frequencies? Answer: These are the frequencies we have utilized in the past plus the specific frequencies that our clients requested. 8 aA N ANTONIO, T5X as

SENT BYy: i 8—25=—97 i 14‘:§1 i LEGAL DEPARTMENT~ 20260 T900 /i%® 0 Mr. uie August 25, 1997 Page 2. Question: How long is the dwell time? Answer: Five seconds. Ifnecessary, we can monitor the specific frequency before turning on the power so that we can do these on a non—interfering basis. We would hope that most (or all) of the frequencies could be allocated without having to go through the above monitoring. Please consider this letter to be our formal amendment ofthe above referenced application. Ifyou need more information, don‘t hesitate to call Monica Trollinger at (210) 522—2361. Sincerely, notes] W. McLeod Counsel :sem co: Jim Polonis

SENT BY: i0 Q=17—987 i 14:08 i LEGAL DEPARTMENTS 2028875637# 2 SsSOUTHWEST RESEARCH INSTITUTE 8220 CVLEBRA ROAD e POST OFFICE DRAWER28510 e SAN ANTONIO, TEXAB, USA 7B22M.0510 e (210)684—5111 o TELEX 244848 September 17, 1997 VIA FACSIMILE (202) 418—1918 Federal Communications Commission Attn: Mr. Carl Huie 3 Mellon Bank Center 525 William Penn Way Pittsburgh, Pennsylvania 15259—0001 Re: File Number 5787—EX—MR—97; Southwest Research Institute Dear Mr. Huie: Thank you for your request dated September 16, 1997 sent via facsimile to Monica Trollinger concerning the above—referenced file number, I hope the explanation provided below will be helpful in this matter. In response to your request to provide formal justification for additional frequencies, most commercial clients have their own immunity test procedures. We do not know the basis for their requirements. However, we have data on whole vehicle immunity tests that identify susceptibility problems having resonance characteristics of a "Q" of 102. We believe the higher Q‘s can exist and can cause vehicle operational problems. The additional frequencies requested would give a reasonably high probability of detecting whole vehicle and subsystem immunity problems. . Some clients request full frequency sweeps for immunity testing. In an open area test site environment, this is not feasible and even ifit were feasible, Southwest Research Institute as a responsible corporate citizen would not perform full frequency sweeps for immunity testing. However, we do recommend a balance between full sweeps and discrete frequencies by requesting additional frequencies. Generally, clients accept this We feel fewer frequencies will not allow a comprehensivs or good test since chances are those frequencies will not be at the equipment under test resonances. If we can provide you with any additional information to help expedite this matter, please do not hesitate to contact Monica Trollinger via telephone at (210) $22—2361, or via e—mail at mtrollinger@swri.org. Thank you tor your prompt attention in this matter ( Sincerely yours, L driguez Deputy General Counsel Co: Jim Poloms §A N aANTONIO, TEX as HOUSTON, TEXAS ® DETRO!T, MICHIGAN ® WASHINGTON, DC


Document Created: 2001-07-30 16:48:30
Document Modified: 2001-07-30 16:48:30
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC