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Q: What does negative loss means in optical fiber tests?
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What does a doctor mean by negative O'brien and a negative Hawkins?

She means that tests for a labral tear and shoulder impingement were negative.


What about Cable Monitoring System?

GLSUN optical cable monitoring system, combined with OTDR, optical switch, and upper-level network management software, form a systematic and intelligent system integrating functions of testing, analysis, alarm, positioning, information management, and worksheet. It features high integration density, strong commonality, abundant product form, and flexible upgrading and expansion. Fiber In-Service Monitoring Light sources of different wavelengths will not interfere with each other in the transmission process in optical fiber. Based on this principle, we combine the service light [wavelength 1550] and test light [wavelength 1650] for transmission, so that the quality of optical fiber can be monitored without interruption of service. Spare Fiber Monitoring Spare fiber monitoring is to inject the monitoring signal into the spare fiber and indirectly observe the loss of other fiber in the cable by monitoring the loss of the spare fiber. Since the monitoring signal goes through the spare optical fiber, passive device such as filter is not required, which can effectively reduce the installation process and cost of the system. Fiber Out-of-Service Monitoring Optical fiber out-of-service monitoring refers to monitoring the original communication optical fiber in the condition that communication equipment is interrupted. Therefore, passive devices such as filter are not required, which can effectively reduce the installation process and system cost of the system. The disadvantage is that communication equipment needs to be interrupted. Application: Optical switch + OTDR Monitoring Scheme Optical power monitoring scheme can monitor the total loss of optical fiber, but it can not reflect the loss performance of optical fiber, nor can it find the fault of optical fiber. While OTDR can monitor the loss performance of the fiber. It can find the failure type and accurately by analyzing the OTDR curve. Since OTDR costs are relatively high, optical switch is needed to switch to different optical fibers, so as to reduce the cost of the whole system. By controlling the 1xN optical switch, the control unit starts the OTDR to test the optical fiber loss performance in turn. By analyzing the test curve of OTDR, the purpose of optical fiber monitoring is achieved. Application: Optical Power Detector + Optical Switch + OTDR Monitoring Scheme This scheme can effectively solve the problem of poor timeliness for fault report of optical switch + OTDR scheme. The optical power detector monitors the total loss of the optical fiber in real-time. If any abnormality is found, the control unit is informed to start and switch to the abnormal optical fiber and conduct OTDR fiber performance test. The alarm type and will be identified by analyzing OTDR curve. The control unit can also control the OTDR and optical switch for periodic tests and roll call tests. However, this scheme still has the problem of poor timeliness caused by OTDR polling in case of abnormality of multiple monitored fibers. Application: PON + Optical Switch + OTDR Monitoring Scheme With the development of FTTX, PON network monitoring and maintenance has been mentioned on the agenda by telecom operators or special network users. Glsun developed high sampling accurate OTDR module for PON monitoring. Reference from www dot glsunmall dot com


What does a negative abdomen CT result mean?

When doing medical tests, negative sounds bad but it's actually good. Negative means they didn't find anything wrong.


What does one line mean on a pregnancy test?

it varies from test to test but usually on most tests only one line means a negative result


Can you make a sentence using the word conclusive?

The blood tests made a conclusive diagnosis. Conclusive testing can show positive or negative results. Conclusive simply means definite. While the patient had a preliminary diagnosis of leukemia, negative results of tests were conclusive.


What happens if Coombs' tests are negative?

If the Coombs' tests are negative, the anemia is unlikely to be autoimmune, and the hematologist will have to search elsewhere for a cause


Where is the best place to go in Chicago Illinois for eye tests?

There are a few good places to go in Chicago, Illinois for eye tests. Some of the best places are 'Red Eye Optical', 'Eye Appeal Optical', 'Urban Eyecare' and 'Custom Eyes'.


What has the author E E Shreiner written?

E. E. Shreiner has written: 'Scientific tests of colored glass for optical purposes' -- subject(s): Glass, Optical instruments


If you have done 6 pregnancy tests and they are negative is this conclusive?

Yes as they are negative you can conclude, the test is negative and nothing to worry.


Abbreviation for the device that can input data from multiple choice tests?

OMR


You have been having pregnancy symptoms- but your PT tests are negative-Could you still be pregnant?

Yes it is called a positive negative and the tests are only 99.998 precent correct


You have had 3 positive blood pregnancy tests and one negative home pregnancy test which was taken after the first positive blood test was reported what does this mean?

It means that either the blood tests were wrong or the home pregnancy test was wrong