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rf interference from sony HD cam on Lectro radio mics


gavin

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Hi all,

Most bizarre RF interference from Sony HD Cam HDW 750 on my lectro radio mics.

Twice on a series, weeks apart, no other occurences, using radio mics all the time...

Problem: sounds like noisy "breathing/beat" over my radio mics, cyclical, spacing of about 5 seconds. All is OK on rehearsal, but when the cameras roll, the hit comes, similar to cellphone hits, but not! Very quiet room, 20ft from tx to rx. Different frequencies each time. Audio quality is unaffetced, the 'noise' is 'over' the audio. Has anyone had this before? Any solutions? Has anyone ever tried to electronically 'blimp/shield' a HD camera, I know they are basically just one big RF generator, but everything else has been fine so far.

Signal flow: B6 lapel, Lectro SM block 26, ~20 ft tx to Lectro shark fin antenna, Lectro venue VR, Audio developments 146 to SD 744. Normal gain/rf reception, no RF hit or reduction in received signal strength, all cell phones off on set and nearby areas, occurs on both DC and AC power, and also occurs with my Lectro butt plug wireless boom with an MKH 60 attached...the only thing I have noticed is that both times the camera has been between the tx and the receivers, but it has been in other environments and it's been fine.

Any ideas, Ta,

Gavin

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