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Junior Varsity
X32 Discussion
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<blockquote data-quote="Timo Ulkuniemi" data-source="post: 83143" data-attributes="member: 1978"><p>Re: Monitor out noise</p><p></p><p>Hello</p><p></p><p>pictures two and three have spikes at different frequencies - what happens if you short the input of your measuring system ?</p><p></p><p></p><p>For whatever it is worth - I received my console mid-august as soon they became available - and only problem I have is ch16/32 "helicopter" - mainly on ch 32</p><p></p><p>Monitor output and headphone output are quiet besides normal even hiss, when cranked up.</p><p></p><p>I run my system @ 44,1</p><p>I switched it to 48 just to try, but there was no difference. </p><p></p><p>While playing around with "helicopter" I noticed, that if ch 32 is all full gain / fader full up ( which naturally is no real life situation...) switching channel select buttons becom VERY audible. So the cable going vertically inside console next to ch 16/32 must carry some serious amount of data, which radiates some and the preamps are capable of picking it up.</p><p></p><p></p><p>Terminating the input with 600 ohms resistor makes "chopper" go away leaving low-level whining. I pumped channel 32 compressor gain up 24dB to get some reading on X32 master meter. Without input termination ch 32 noise is @ -8dB and with termination -33dB. So proper termination takes care of 25dB - same goes for channel switching noise.</p><p></p><p></p><p>Some of these days - perhaps - I will open the console and reroute that one cable causing noise.</p><p></p><p></p><p></p><p>Nuuska</p></blockquote><p></p>
[QUOTE="Timo Ulkuniemi, post: 83143, member: 1978"] Re: Monitor out noise Hello pictures two and three have spikes at different frequencies - what happens if you short the input of your measuring system ? For whatever it is worth - I received my console mid-august as soon they became available - and only problem I have is ch16/32 "helicopter" - mainly on ch 32 Monitor output and headphone output are quiet besides normal even hiss, when cranked up. I run my system @ 44,1 I switched it to 48 just to try, but there was no difference. While playing around with "helicopter" I noticed, that if ch 32 is all full gain / fader full up ( which naturally is no real life situation...) switching channel select buttons becom VERY audible. So the cable going vertically inside console next to ch 16/32 must carry some serious amount of data, which radiates some and the preamps are capable of picking it up. Terminating the input with 600 ohms resistor makes "chopper" go away leaving low-level whining. I pumped channel 32 compressor gain up 24dB to get some reading on X32 master meter. Without input termination ch 32 noise is @ -8dB and with termination -33dB. So proper termination takes care of 25dB - same goes for channel switching noise. Some of these days - perhaps - I will open the console and reroute that one cable causing noise. Nuuska [/QUOTE]
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