Wireless Sennheiser dropouts - antenna booster or remote mount antennas

mbenonis

Wireless Guy
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Sep 1, 2003
Location
Chicago, IL
The ONLY way you can get different results is if you muck around with the spacing parameters, all the software is working pretty much the same under the hood. (Mike and I have discussed this at some length)
Strictly speaking, most of the software uses a random number engine, and so in some cases, if you massage the numbers enough, you can eeke out one or two more frequencies...but Chris is right, adjusting the spacing parameters is much more likely to generate more "valid" frequencies.
 

Anonymous067

Active Member
Joined
May 31, 2008
I believe Mike was using IAS.
The ONLY way you can get different results is if you muck around with the spacing parameters, all the software is working pretty much the same under the hood. (Mike and I have discussed this at some length)

The A band is common to all generations of Sennheiser, it's limits however have grown slightly each generation.

The OP has his location listed in his profile...
I thought the G3 was tunable to more freqs than G1? and I also saw the OP say that he was using one non-A band unit...
 

sdauditorium

Active Member
Joined
Mar 17, 2010
Location
Door County, Wisconsin
Thanks to Chris with the frequency coordination, and things look better. I just put an order in through Full Compass for 2 of the Wideband Passive UHF Antennas, cable, and wall mounts. We're going to install those antennas on the back wall (FOH) directly in front of our sound booth. While not decreasing distance to the stage that much, hopefully the directivity and getting them out of the booth a bit should help.

I'd love to move them on-stage, but we don't have a snake at this point so pulling audio would be tough. We're looking at doing a new sound system install in a year or two and would probably move the mic receivers down to stage and get 48 channels through a couple digital snake units on stage at that point.
 

sdauditorium

Active Member
Joined
Mar 17, 2010
Location
Door County, Wisconsin
Thanks for the help. We finally have the A-1031s mounted on the outside wall of our booth in the house. As mentioned, I picked up Senny's low-loss antenna cable-stuff is thicker than a brick. Also have the Mini-Circuits splitters feeding all of the distro and mic receivers.

I did a simple test run with a bodypack. A friend took the bodypack and roamed the house, on stage, and actually out the back door stage right and through another exterior entrance back to stage. The RF signal rarely dipped below 40 at all (only time was outside).

More importantly, the low-level RF the receivers had been picking up when none of our transmitters on is gone as well. I'm not sure if that was resultant from ground plane issues with the way our stock whips were mounted to the front of the rack, but it's good news all around.
 

jowens

Member
Joined
Oct 6, 2008
Location
Centerport, New York, United States
You should not be having issues at 100' from the stage. Have you checked to make sure you are not operating on top of a local TV station? How many systems are you using, and how did you plan out the frequencies?

I highly recommend AGAINST an antenna booster. Antenna boosters (also, more properly called wideband RF amplifiers) tend to cause more problems than they fix because they amplify undesired signals and are prone to being overdriven, causing intermodulation. If you are going to buy something, spend the money on directional antennas and use passive splitters to distribute the signal to the receivers.

See the FAQ if you haven't already.
Would you recommend taking my boosters out?
I"m running 10 or so in A, 8 in B, and 4 in G. The best belden low loss 50ohm cable I could find (REAL thick) running about 90' to the remote mounted 1031's. Boosters on each of the three remote antennas (one for each freq).
I'm due for a recalc of frequencies, but things are not quite as perfect as they should be considering the equipment...
 

waynehoskins

Active Member
Joined
Jul 4, 2008
Location
Arlington, TX
Would you recommend taking my boosters out?
I"m running 10 or so in A, 8 in B, and 4 in G. The best belden low loss 50ohm cable I could find (REAL thick) running about 90' to the remote mounted 1031's. Boosters on each of the three remote antennas (one for each freq).
I'm due for a recalc of frequencies, but things are not quite as perfect as they should be considering the equipment...
I'd take the antenna boosters out. Your line loss should be negligible if you're running something like 9913 or better, so you're only reducing your S/N ratio. Since SNR is way more important than raw signal strength (in virtually everything, not just RF), if you optimize the system for good SNR, you should be good.
 

mbenonis

Wireless Guy
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Joined
Sep 1, 2003
Location
Chicago, IL
Agreed. "Boosters" (really, wideband amplifiers) often cause more problems than they solve!
 

microstar

Well-Known Member
Joined
Jan 19, 2014
Location
Lawton, OK
If you're looking for the best reception resolution, I would suggest 26 dBi Gain external antenna that can directly connect to the wifi router and amp up its signal. Here's the one I have that works for me : signalbooster.com
You do realize the thread you are responding to is almost 9 years old? Also, they didn't say anything about a wifi router. They are talking about analog wireless microphone systems, not 2.4Ghz stuff.