I found the 4-room picture at 56:50 in the webinar (it goes by so quickly - good catch!). Essentially, it’s the same drawing as in the tech bulletin linked below: www.shure.com/americas/support/find-an-answer/antenna-distribution-4-rooms-8-antennas I noticed that the “A” and “B” antennas for Rooms 1 and 3 in the webinar picture indeed were labeled incorrectly. It should be possible to trace each antenna through the two splitter kits back to the corresponding input at the main equipment rack. If the antennas were connected according to the webinar picture it still would be ok, as both an “A” and a “B” antenna are placed in each room. Thanks for catching the error! I hope this helps to explain it.
We recommend 50-ohm coax cable such as RG213 or RG8 for remote-mounting applications. Using 75-ohm cable will result in additional signal loss due to the impedance mismatch, something around 2 dB or so. Some of these cables also introduce significant signal loss. The manufacturer of the particular cable you are using should have a specification for signal loss over 100 feet of cable at certain frequencies. A reference chart we have here shows RG6 cables to have about 5 dB of loss at 450 MHz, as an example. The total signal loss at the receiver should be no more than 5 dB, regardless of which type of antenna cable you are using. It may be possible to run 50 feet of the RG6 and use the paddle antenna set to -6 dB. For a 100-foot cable run, you probably will have to set the amplifier to 0 dB or +6 dB. The paddle antenna has about 7 dB of gain in the forward direction when compared to an omnidirectional antenna, which also should help.
@@shure Can you expand on the note about impedance mismatch causing a loss of 2dB? As this value is 0.18dB from other references which clearly show their calculations. Access to the reference calculations that lead to the 2dB value would be very helpful to understand this fully!
@@huktek Thanks for your question! As you note, the precise calculation does result in a less loss than we state in the webinar (sounds like your referencing this paper: audiosystemsgroup.com/Which_Coax_for_Wireless_Mics.pdf) For purposes of simplicity, we often just round to "1 dB or so" to illustrate that while there is some additional loss, it's negligible. Ultimately, we would like the takeaway to be that as long as your total loss is less than 5 dB, that's what matters the most. One or two dB, either way, won't affect the overall performance of the wireless system.
Great webinar! I've been working in TV for over 30 years, and I still learned some new things - Thanks!
Thank you team Shure!
so interesting, just wanted to know if I should raise the transmitter higher during the weddings I do. (Yes) but learn a lot. Thank You
Awesome video! Just bought your 1/2 wave antennas to upgrade my wireless mic receiver
Great Webinar. Thanks for this information.
It’s a little disappointing that they did not DS the guest speaker, the host could’ve been turned up a little more. A microphone company
Awesome! Thats exactly the information I was lookin for! Thanks!
Glad it was helpful!
Muy Bueno. Excellent guys, great job, love this webinar.
Thanks Doc, happy you liked it!
very very usefull!! thanks a lot
Any reason why I could not use the cascade output to feed a fifth receiver?
The four room antenna combining diagram is wrong, yes? B and A from all rooms should remain on their own legs?
I found the 4-room picture at 56:50 in the webinar (it goes by so quickly - good catch!). Essentially, it’s the same drawing as in the tech bulletin linked below:
www.shure.com/americas/support/find-an-answer/antenna-distribution-4-rooms-8-antennas
I noticed that the “A” and “B” antennas for Rooms 1 and 3 in the webinar picture indeed were labeled incorrectly. It should be possible to trace each antenna through the two splitter kits back to the corresponding input at the main equipment rack.
If the antennas were connected according to the webinar picture it still would be ok, as both an “A” and a “B” antenna are placed in each room.
Thanks for catching the error! I hope this helps to explain it.
Today I learned I've been doing everything exactly wrong. That explains why our system has been so unreliable, at least now I know it's not the gear.
43:28 looks like my rack!! No wonder why!!
Thanks, now I won't kill myself!!
Can the paddles be used on either end of a stage when set to -6dB on 50' of RG6-quad?
We recommend 50-ohm coax cable such as RG213 or RG8 for remote-mounting applications. Using 75-ohm cable will result in additional signal loss due to the impedance mismatch, something around 2 dB or so. Some of these cables also introduce significant signal loss.
The manufacturer of the particular cable you are using should have a specification for signal loss over 100 feet of cable at certain frequencies. A reference chart we have here shows RG6 cables to have about 5 dB of loss at 450 MHz, as an example. The total signal loss at the receiver should be no more than 5 dB, regardless of which type of antenna cable you are using.
It may be possible to run 50 feet of the RG6 and use the paddle antenna set to -6 dB. For a 100-foot cable run, you probably will have to set the amplifier to 0 dB or +6 dB. The paddle antenna has about 7 dB of gain in the forward direction when compared to an omnidirectional antenna, which also should help.
@@shure Can you expand on the note about impedance mismatch causing a loss of 2dB? As this value is 0.18dB from other references which clearly show their calculations. Access to the reference calculations that lead to the 2dB value would be very helpful to understand this fully!
@@huktek Thanks for your question! As you note, the precise calculation does result in a less loss than we state in the webinar (sounds like your referencing this paper: audiosystemsgroup.com/Which_Coax_for_Wireless_Mics.pdf) For purposes of simplicity, we often just round to "1 dB or so" to illustrate that while there is some additional loss, it's negligible. Ultimately, we would like the takeaway to be that as long as your total loss is less than 5 dB, that's what matters the most. One or two dB, either way, won't affect the overall performance of the wireless system.