ATT level for 302 when using lectros for hops to camera

L

loudlael

Active member
I'm using a mic level cable from the out put of my 302 to a UM200c transmitter from location sound corp. I'm not sure of the proper gain staging for this. 302, transmitter, receiver and camera.
(and I'll be using lectros in the front as well for lava's.
I'll be going into a HDX900 as well if you happen to have any tips on this I would greatly appreciate it.
Thanks
 
If you're using the XLR outputs of the 302, why not attenuate the XLR output of the 302 to -40 dBs? That way, your Lectro's is accepting a mic level input and shouldn't blow out the signal. Then use the camera's preamps to boost the signal back up to line level (or whatever level they ask for.)
 
Thanks But I tried that and got to low of signal when sending tone through transmitter and receiver. I think the main thing is that the receiver just has a green light and a potentiometer so I guess I just have to just eye it?
 
loudlael said:
Thanks But I tried that and got to low of signal when sending tone through transmitter and receiver. I think the main thing is that the receiver just has a green light and a potentiometer so I guess I just have to just eye it?
Click to expand...

Found this on jwsound.net's forum:

B- WIRELESS CAMERA HOP.


1- Here is where we break the rule a bit and mainly because of a quirky output level from Lectrosonics. When operating a wireless camera hop, the last thing you wnt is to hit the transmitter input limiter. First because you cannot hear when you do ( you are not listening to anything after the mixer output ) and second because it is going to limit your entire feed. So we need to gain structure differently then the previous example, we DO NOT want to hit the -20 red on the LEctrosonics transmitters at all. You need to hit -20db green regularly and occasionally hit -10db green. You DO NOT adjust the output of your mixer, you simply the input adjustment on the transmitter itself. If you are turning that adjustment really low, then use it in conjunction with a padded cable in bethween your mixer and transmitter.


2- Receiver end on the camera. Now if you are still reading this post and you have paid attention to what i have said about the receiver ACTUAL OUTPUT LEVEL, you will understand that since we are running the transmitter ( on purpose ) 10 to 15db lower than where it would like to be for actual optimum operation this also means that the receiver will be operating at lower level. What i mean is that for the same SOFTWARE SETTING of full level on the UCR411A you will be getting 10 to 15db less ACTUAL LEVEL OUTPUT. So our level just went down 10 to 15db when set at full level. MAth wise it means that if you are sending a tone at 0db from your mixer into a transmitter, the receiver set at full level will then output a level of APPROXIMATLY -20dbu. THAT EXPLAINS why you need to have the adjustment dial on a Sony EX3 all the way up when the camera is set to receive line level ( +4dbu equalling -20dbfs ). So we need to cheat this by actually setting the camera ( EX3 ) to Mic level and set the your gain on the camera to about 5. IT IS BREAKING THE GAIN STAGING RULES but only because the LEctrosonics receiver is not a true line level output and that WE WANT to have some forgiveness on the transmitters gain setting in order to avoid limiting there.

Here's the link to the rest of this thread titled "Mic level or Line level?" Hopefully this helps you. Cheers!

http://jwsound.net/SMF/index.php?topic=5644.0
 
Yep thanks just trying to figure out how to fit it in my bag with out falling over the place. Also have to solder a TA5 to a FM xlr. this should be fun.
 
Question for you Seth. What receiver are you using for the hops?

If there's any possibility of sending tone from the receiver, use that to calibrate the inputs on the cam et. 2xx and 4xx receivers.

If not, you would need to calibrate from the transmitter. Send tone out from your 302 into your UM200c until the first green LED is lit. This indicates a presence of at least -20 signal into the input. Connect your receiver into the cam, turn cam pots down, turn receiver output level up until desired level.
 
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