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A DV(L)-FAQ [e]

DVL-Digest 632 - Postings:
Index


Any info on the Sony DSR-11 DV
Lap top editing
Mic question


Any info on the Sony DSR-11 DV - "Perry"


From: Bob Andersen
Has anyone seen the Sony DSR-11 DV? If so any comments? The DSR-11 is a
"stripped down" DV deck that will play mini and full sized DV tapes.
It's very small compared to all other full-sized DV decks. I think it
records in DVCAM only. I think it is supposed to cost .



Lap top editing - "Perry"


I've not taken too much notice before, but I now need to know how lap top
editing for DV is working out, and it has to be a cross platform solution.
I guess that means Premiere or EditDV at the moment.
I know of the Sony Vaio and the Gateway with built-in Firewire, and of
course the Apple portable - have folk got Premier or EditDV to work
successfully with these products? Any particular trick you need to know to
get them up and running?
Perry Mitchell
Video Facilities
http://www.perrybits.co.uk/



Mic question - "Perry"


Thien Do posted:
>-In the instruction booklet, it says "the balanced input signal is then
converted to an unbalanced output through an impedance matching
transformer".
What in the world does that mean? What is a "balanced input signal" and
what's the difference between a "balanced" and an "unbalanced" input
signal?<
I can't help you with the hairy condom but this one is a bit easier!
There are actually two points here but they are commonly connected:
1) An ordinary signal lead (like video and the audio in your Hi-Fi) has one
'hot' wire and one return that is commonly earthed (grounded), this is
called 'unbalanced'. If you take a transformer output coil and divide it
into two halves with the centre tap earthed, then each of the other two taps
have an equal but opposite signal, and this mode is called 'balanced'. If
you run this type of cable across radiation like lighting cables, the two
signal wires will pick up the same interference that should then cancel out.
It is also easier to avoid hum via ground loops. Balanced wires are
normally terminated in XLR 3 pin connectors or 3 way 'stepped' jacks for use
on a 'jackfield'.
2) Traditionally, balanced equipment runs into a 600ohm load which is deemed
low impedance. This makes it easier to have long cable runs without picking
up interference and suffering from cable non-resistive impedance (ie
capacitance or inductance) which could effect frequency response. Consumer
equipment tends to be unbalanced and runs into relatively high resistance of
several thousand ohms or more. This is usually fine for short connections.
You can convert signals between the two standards using a matching
transformer or an electronic equivalent. If you are careful you can even do
it with a simple lead connected to the right pins.
Perry Mitchell
Video Facilities
http://www.perrybits.co.uk/




(diese posts stammen von der DV-L Mailingliste - THX to Adam Wilt and Perry Mitchell :-)


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