Dave Pullmer Posted September 12 Report Share Posted September 12 Hi all. I’ve been wanting to add filtering to my set up for a while and am considering a few options. Currently running a PSC RF multi with SRCs and a RF Venue diversity fin. 12ft, and 50ft cable runs for cart use only. Performance has been adequate, but I’ve seen a lot of ppl post they haven’t been super happy with this combo, and I think I could be getting more out of it if I was blocking out unwanted rf noise. I’ve been thinking of either upgrading my distro to the audio wireless DADM (built in filtering + ability to have an active antenna on a single channel, or both - unlike the rf multi) Or adding the new audio wireless rf filter/booster to my current set up ( https://www.audiowireless.co.uk/online-store/DIGITALLY-TUNED-DUAL-ANTENNA-FILTER-DT-BOOST-2-p481882216 ) Or adding an antenna with filters like the Wisycom LFA to my current system. Would be curious to hear people’s thoughts on the differences between upgrading the rf distro vs. antenna vs. simply adding a filter to the current set up… Quote Link to comment Share on other sites More sharing options...
r.paterson Posted September 12 Report Share Posted September 12 You could end up. Running in circles trying to add stuff.. Main issue I found with Psc multi other than being full bandwidth is it adds gain on the sma outs without it being needed.. I've had 4 diff makes of Rf dist and I've now got and only use 2 x sets of Audio Wireless DADM various models.. Its the cleanest rf noise wise and most flexiable IMHO i use it at 0db gain as normal. . Only thing is if using the DADM hirose 4 pin dc outs for extra dc outputs the unit can't handle heavy loads I think the rf dist and all the hirose outs max out at 2 amp. And in the menu setting make sure the dc is *off * for the sma outs (it's for powering micron receivers via sma connectors). Quote Link to comment Share on other sites More sharing options...
Dave Pullmer Posted September 12 Author Report Share Posted September 12 Thanks for the tip… yea if I was to get the DADM, which I am leaning towards - I likely wouldn’t use the power distro on it. Quote Link to comment Share on other sites More sharing options...
OB1 Posted September 12 Report Share Posted September 12 34 minutes ago, r.paterson said: And in the menu setting make sure the dc is *off * for the sma outs (it's for powering micron receivers via sma connectors). I was always curious what purpose the individual SMA powering option on the DADM was for... Quote Link to comment Share on other sites More sharing options...
r.paterson Posted September 12 Report Share Posted September 12 1 hour ago, Dave Pullmer said: Thanks for the tip… yea if I was to get the DADM, which I am leaning towards - I likely wouldn’t use the power distro on it. They are handy if you have to quickly power an extra added receiver etc, Quote Link to comment Share on other sites More sharing options...
rich Posted September 12 Report Share Posted September 12 2 hours ago, OB1 said: I was always curious what purpose the individual SMA powering option on the DADM was for... Micron radio mics (who Aldo the Audio Wireless designer used to work for) allowed you to power your receivers via the SMA connectors. Quote Link to comment Share on other sites More sharing options...
Michael Capulli Posted September 23 Report Share Posted September 23 This has been a reliable setup for me once I had my older SRCs updated to the Rev B boards. Occasionally If I am dealing with DMX interference I will swap out the passive LPDAs for dipoles / they seem to bring less crud in - and I keep a few of the PF25 filters handy and drop inline as needed. If you want to go with LFA there are many happy users and they are very well made, I personally prefer to just pop in the PF25 which is more narrowband anyway. I tend to keep all my talent within 1-2 TV channels so I haven't needed a tunable filter on top of the tracking filter inside the receivers. I prefer to keep things passive and simple if I remote my antennas its 75ft of RG8X after that I am moving closer or going over the shoulder. If I am having RF issues it seems 90% of the time its interference not range so I pay close attention to the spectrum and my coordination. If I start adding tunable filters and amplified antennas It's just going to be too much for me to troubleshoot. I'm not sure how much you are to gain by bypassing the RF distro built into the PSC? Quote Link to comment Share on other sites More sharing options...
Dave Pullmer Posted September 24 Author Report Share Posted September 24 Thanks for the post - I am definitely into the ethos of keeping things simple with passive components. When you mentioned remoting your antennae 75ft, are you referring to passive antennae? I thought I have read anything past 50ft would require compensation for signal loss. I use RG8X also for my cables. Also, are you using 2 passive LPDAs? Or are you also using the diversity fin? My wireless can be within 2 TV channels so I don’t really need a moveable filter either, but it is a form of future proofing. I guess the potential weak points in my system are the SRC receivers (not diversity reception unless operating in ratio mode as 1ch rx), and potentially the diversity fin which might not be as solid as 2 LPDAs. My cart is pretty small and mobile, so I do have the ability to easily park closer to set and do longer cable runs back to VTR or anyone that needs comms feeds. In a world where it’s helpful for us to have quick solutions to a problem immediately, being able to pop out a 100ft cable run seemed like a decent option to have in the bag also. Quote Link to comment Share on other sites More sharing options...
LarryF Posted September 24 Report Share Posted September 24 RG-8X has 7.5 dB of loss at 75' and 600 MHz, only a dB better than RG-58 RG-8 has 4 dB of loss, same conditions Best Regards, Larry Fisher Quote Link to comment Share on other sites More sharing options...
Michael Capulli Posted September 25 Report Share Posted September 25 There is some gain in the passive fins and for me that 75' length is not too bulky and still enough to give an edge in certain situations Quote Link to comment Share on other sites More sharing options...
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