Vibration in sound. PAKISTAN BROADCASTING CORPORATION › Forums › High Power Transmitters › Islamabad HPT-2 › Vibration in sound. This topic contains 0 replies, has 1 voice, and was last updated by Asad Javed 2 years ago. Viewing 1 post (of 1 total) Author Posts June 7, 2017 at 3:41 pm #1200 Asad JavedParticipant Problem Statement: Vibration in sound at Dish (2) Startrack Receiver’s audio signal. Root Cause: the Pre-amplifier at control both is making vibration in audio signal. Rectification Activity: The activity performed to rectify the problem are as follows The Dish Receiver(Startrack) Serviced using contact cleaner. The Patch Cord Female socket changed The Pre-amplifier at control both changed Results: The vibration in sound removed and the sound quality found bright. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.