rosa Posted January 28, 2017 Report Share Posted January 28, 2017 Hello, I did 4 scans on my Wireless Receiver, and the first three make sense. The mixer by itself did not add any significant RF, and the TX by itself added the suspected amount, but when I turn them both on I don't have much to choose from. Any ideas? 1)RX 2)RX+Mixer 3)RX+TX in IFB mode 4)RX+Mixer+TX Thanks, Rodrigo Quote Link to comment Share on other sites More sharing options...
Philip Perkins Posted January 28, 2017 Report Share Posted January 28, 2017 What mixer? Which wireless? How close are they (in a bag)? How are they powered? Quote Link to comment Share on other sites More sharing options...
rosa Posted January 28, 2017 Author Report Share Posted January 28, 2017 633, Lectro UM400 in IFB mode and UCR411a, all independently powered for the test. Rx above Mixer in bag, and IFB TX on the side of the bag. Quote Link to comment Share on other sites More sharing options...
Philip Perkins Posted January 28, 2017 Report Share Posted January 28, 2017 If you move the TX away does it get better? Are the TX and the RX in the same block? Have you run the freqs through an app like FreqFinder to see if they are compato? Quote Link to comment Share on other sites More sharing options...
Constantin Posted January 29, 2017 Report Share Posted January 29, 2017 Did you clear the memory between scans? Did you hit the menu button and zoomed in? Quote Link to comment Share on other sites More sharing options...
rosa Posted January 29, 2017 Author Report Share Posted January 29, 2017 7 hours ago, Philip Perkins said: If you move the TX away does it get better? Yes, moving the TX a few yards away does change the results of the scan considerably, but still affects the scan when I turn the mixer on. As I said before, the mixer by it self does not alter the scan, only when the IFB is on. 7 hours ago, Philip Perkins said: Are the TX and the RX in the same block? Yes, Block 26, and the TX in IFB mode, by itself scans as expected, (3rd picture) 7 hours ago, Philip Perkins said: Have you run the freqs through an app like FreqFinder to see if they are compato? Compatible with what? Its only one frequency. 2 hours ago, Constantin said: Did you clear the memory between scans? Did you hit the menu button and zoomed in? Many Times. My question is, How can an IFB affect the RF coming from the mixer or vice versa? I´ll keep trying different things to find out what is going on, and hope to learn something from this. Thanks Quote Link to comment Share on other sites More sharing options...
Jim Rillie Posted January 29, 2017 Report Share Posted January 29, 2017 In my experience, having a TX and an RX in the same block within less than 6-10 feet or so, sometimes even further can cause grief - I haven't scanned in that situation, just moved TX far enough away so gremlins go away. Quote Link to comment Share on other sites More sharing options...
karlw Posted January 30, 2017 Report Share Posted January 30, 2017 There is probably low-level, wideband RF coming from the mixer, which then interacts with the IFB transmitter by generating intermods. This is one reason why we (and others) generally recommend having your IFB and your talent transmitters on two different frequency blocks. Quote Link to comment Share on other sites More sharing options...
carbonhobbit Posted January 30, 2017 Report Share Posted January 30, 2017 Here's a question? Now that we have the wide band receivers and transmitters, how will we go about picking the right transmitter setting for hops if we will only have six blocks to choose from? Quote Link to comment Share on other sites More sharing options...
karlw Posted January 30, 2017 Report Share Posted January 30, 2017 At the very least, put things at opposite ends of the band. For instance, if you have IFB on 23 and you're using B1 talent mics, put the IFB at the top of 23 and the talent towards the bottom of B1. And, physically separate everything as much as you can. A handy tool for that is the coax antennas we make, both with BNC and SMA connectors. These can help get your IFB or hop transmitter antennas out of the bag and away from your talent receivers. Quote Link to comment Share on other sites More sharing options...
audiofp Posted March 11, 2017 Report Share Posted March 11, 2017 Trying to allocate my bag freqs. Here in AZ I've had good success with talent transmitters in the A1 (470-537mhz) block. I currently send com and ref cam feeds on Senn, G band (566-608), usually in the higher freqs. Trying now to wedge an SRc for camera hop in B1 (537-608) fed by Blk. 21 (537-563) or 22 (563-588mhz) transmitters (50-100mw). At least 2 block (50mhz) separation between talent/hops/coms seems to be a good target. Antennas can be separated sometimes but usually they'll live in the bag. Suggestions? Quote Link to comment Share on other sites More sharing options...
karlw Posted March 13, 2017 Report Share Posted March 13, 2017 audiofp, your plan looks solid to me. I would suggest keeping your com and cam feeds at the top of the Senn. G band (as close to 608 as possible), and then keep your B1 units in the low part of block 21 as much as possible, or possible the low part of 22. That should give you adequate separation. Quote Link to comment Share on other sites More sharing options...
audiofp Posted March 13, 2017 Report Share Posted March 13, 2017 That helps- Thanks Karl. Quote Link to comment Share on other sites More sharing options...
mikewest Posted May 19, 2017 Report Share Posted May 19, 2017 Hi Rosa Unlock the 400 and watch it's screen Step it's frequency (either way) until there is no show of any RF signal Then have a listen and if it sound ok use that freq (change the transmitter to) The alternative way is to do a scan, put it into "examine) mode Then look for the biggest clear space and set your 400 there Neither of these ways are scientific but just field fixes Best was is to plan your frequencies with planning software I still use the old Audio Ltd "WinMod" Hope that helps mike Quote Link to comment Share on other sites More sharing options...
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