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Thank tony for reply.Please find the reply in blue that i found the case in several days ago.
Only one mode can work,it is not the same as mobile that we can use signal mode to control RX and TX on at the same time,it is FM modulation
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Several days ago,for the network...
Hi SLK001,
I double checked the unit,radiation test in our lab to check the whole band,nothing Disturbance signal can be found.I tested in shieding room,set the unit in RX mode,tested by antenna couple.I found only noise floor exist.I also followed your suggestion to place another unit close to...
You are right.Now my problem is how to repeat the lab test and how to prove the measurement in lab is correct.If i test in my lab,i need consider the reflection and calibrate the test platform ,it is not easy to do that without 3m chamber.Have you any suggustion?
OK.
We made one head kit,and provided it to lab for test to simulate the situation of our product normal operation.So antenna performance tuning is also based on human head or head kit.Next Monday i will test this kit by OTA to confirm this head kit
does not affect the test result.
To be honest,all the units has the same phenomenon and all the old serial projects with Analog modulation have this problem if we need obey this new standard(radiation test),to me,it is really a disaster.Our unit is head band unit(no hand-helded),so need test with head kit,so more complex than...
Thank SLK001 for your suggestion.It is really good way to judge what the root cause come from.And how to discrease the
effection when the second radio unit is close to antenna of the first unit?
Another thing that i am not sure the definition about 20dB sinad in the standard.Hp8920 can select...
Maybe i did not express clearly about the range test ,our unit maximun power is 200mW/sensitivity=-t121dBm,the test range
is almost the same as Motorola unit(0.5W,sensitivity=-121),for the safety requirement,except connector and antenna,all
of the circuit is in shieldcan,so few possibility...
Here is the test data from lab.Now i do not know why to prove whether the measurement in lab is correct.because the test result is negtive direction with the result of outdoor field test.
Thank SLK001`s reply.The requirement is less than 26.5uv/m,but my unit measure data is 39.5uv/m.it is out of specification.
Now i am not sure what is the problem come from.Lab measurement problem?or my unit problem?(but out door field test is better than Competing products)
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Hi friends,
We meet one case about avarage usable sensitivity issue.Our unit(walkie talkie PMR446MHz) conduct
measure sensitivity is -121dBm@12dB,and outdoor field test range is 3.2Km in all directions(8 directions,45 degree/direction),but when we sent to lab for test,the result(radiation...
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