THANKS AGAIN JOE50 I THINK A GOOD PARTNERSHIP IS BUILT UP BETWWEN US.
ANY WAY AS I MEASURED AND UNDERSTAND CTB &CSO- IT IS CLEAR TO ME THAT:1)AT FIELD YOU MUST CHECK THE INTIER BANDWITDH TO GET A CLERER FICTURE OF OVERALL DISTORTIONS ,NOT JUST AT THE OFFSET POINTS OR UNDER THE CARRIER.2):IT IS CLEAR TO ME THT IN THE HFC HEAD END WHEN IT HRC ,CTB AND CSO MUST BE MEASURED UNDER THE CARRIER AND MUST TURN OFF THE MODULATOR.
3):IN NON HRC HEADEND (IRC FOR EX) YOU CAN CHECK CSO IN 4 OFFSET POINTS AROUND THE CARRIER.
OUR HFC IS HRC ,SO I CHECK UNDER THE CARRIER.
BY THE WAY HAVE YOU EVER CHECK THE IINTERCEPT POINTS OF AN AMPLIFIER?
CTB.CSO.MEASURMENTS
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