Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Learning
Videography
Microphone suggestions
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="spb_stan" data-source="post: 730347" data-attributes="member: 43545"><p>If your mixer output level is the lowest possible to prevent clipping to the camera preamplifier, you will lower your signal to noise ratio. The best solution there is to make an simple attenuator cable that has a resistor network to drop line level output from the mixer(-10dbv for unbalanced, +4dbm for balanced line out of the mixer)</p><p>If the mixer has balanced line output cut the cable and insert a H divider </p><p>Pin 2 of the XLR mixer out connector to a series 47k resistor and pin 3 to a 47k resistor and the free ends of the two resistors, bridge across them with a 100ohm resistor. The junction of the 100 ohm resistor and 47k resistor would than be connected to the end of the cut cable that goes to the camera 3.5mm center pin and the and the other junction of 100 ohm and 47k would be connected to either the ground lug of the 3.5mm plug if you are using an unbalanced cable or to the ring pin of the plus if using balanced 3.5mm plug, and short the ring lug and ground together. If the level is too weak, raise the value of the 100 ohm resistor to 270 ohms. If the resistor legs are kept short so it is a small network no shielding is needed so just tape it up like a little bulge in the cable and noise will not be induced due to the low value of the shunt resistor. If you wanted to get fancy, a small metal box or a metal tube 1/2in in diameter could be used as a shield and solder the pin 3 wire from the mixer to the inside of the metal tube before taping it up. </p><p>Good luck</p></blockquote><p></p>
[QUOTE="spb_stan, post: 730347, member: 43545"] If your mixer output level is the lowest possible to prevent clipping to the camera preamplifier, you will lower your signal to noise ratio. The best solution there is to make an simple attenuator cable that has a resistor network to drop line level output from the mixer(-10dbv for unbalanced, +4dbm for balanced line out of the mixer) If the mixer has balanced line output cut the cable and insert a H divider Pin 2 of the XLR mixer out connector to a series 47k resistor and pin 3 to a 47k resistor and the free ends of the two resistors, bridge across them with a 100ohm resistor. The junction of the 100 ohm resistor and 47k resistor would than be connected to the end of the cut cable that goes to the camera 3.5mm center pin and the and the other junction of 100 ohm and 47k would be connected to either the ground lug of the 3.5mm plug if you are using an unbalanced cable or to the ring pin of the plus if using balanced 3.5mm plug, and short the ring lug and ground together. If the level is too weak, raise the value of the 100 ohm resistor to 270 ohms. If the resistor legs are kept short so it is a small network no shielding is needed so just tape it up like a little bulge in the cable and noise will not be induced due to the low value of the shunt resistor. If you wanted to get fancy, a small metal box or a metal tube 1/2in in diameter could be used as a shield and solder the pin 3 wire from the mixer to the inside of the metal tube before taping it up. Good luck [/QUOTE]
Verification
Post reply
Forums
Learning
Videography
Microphone suggestions
Top