Q: why disconnect SD ref when blacking tapes? Seems unnecessary. The ref is for servo - if you have no reference, then servo just runs off AC mains, with all its potential irregularities. When blacking tapes, leave SD ref connected, set servo ref to external, and set internal video / audio signal generators to black / silence.
On Tue, Nov 12, 2013 at 4:50 PM, John Moore <bigfish@pacbell.net> wrote:
Got a rental SRW-5500 in today and I've set it up as I always do. Starting with the Factory vtr settings and tweaking a few thing I like. I run with external sync from composite SD black when doing digital cuts to tape and it works fine. To black the tape I set the deck to black on the internal signal generator and silence for audio. Whenever I black tapes using the internal generator I always notice the stop light flashes as if there was no sync or problem sync. To be safe when blacking tapes I unpatch any video input and I switch the servo reference to input video. On today's machine when I looked at the composite character generator out while blacking I noticed the black box of time code was dithering left and right consistantly and then I noticed the front panel of the deck said lost lock. I busted the record and have found that unless I set the servo reference to auto or external when blacking internally there appears to be some sort of unstable reference like issue. I have never seen this behavior before and I've worked with this model a lot. You can black a tape with the machine standalone with no signals using the internal generators so why is this machine unstable when not set to reference the external sync source? This seems like a broke. Given I reset to factory I feel the main settings are correct. Perhaps there is some odd Novram setting that is tweaked that I've never had to deal with. I do realize that for some reason the internal video signal generator always seems to have a very different timing window compared to when the deck is just inputting a regular HDSDI source but I never seen this instability on the composite output when blacking tapes. Anybody got an idea what might be up here?
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