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Receiver 1. Diversity Operation 2. Type of Antenna
3. Antenna Signal Distribution
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RF – Signal Distribution 3 dB 30 % Loss 6 dB 50 % Loss
Antenna Cable Loss 1 dB 10 % Loss 3 dB 30 % Loss 6 dB 50 % Loss 10 dB 70 % Loss 20 dB 90 % Loss 40 dB 99 % Loss Receiver Distribution Loss in passive Splitter
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RF-Cable Loss RG 58 RG 213 H 100 dB 50 dB / 100 m 100 m 25 dB / 100 m
Att RG 213 H 100 MHz Frequency
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Antenna Splitter Distribution Loss - 4 dB Splitter 1 : 2 ASP 212
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Antenna Booster 200 µV 20 µV 20 µV 2 µV Noise + 20 dB - 20 dB Cable
RF-Signal S/N 40 dB RF-Signal RF-Signal 20 µV 20 µV 2 µV Noise Booster 20 dB + 20 dB - 20 dB Cable
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Antenna Splitter ASP 1 1 x 1 : 8 1 : 2 4 dB - 8dB 1 : 4 1 : 4
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? Splitter 1 : 12 1 : 2 - 7 dB 1 : 3 1 : 4 1 : 4 1 : 4 - 8 dB
Total loss dB
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Antenna Level 1:2 1:3 1:3 Loss - 20 dB Gain +20 dB Total 0 dB +10 dB
20 m RG213 - 5 dB +10 dB - 4 dB 1:2 - 7 dB 1:3 1:3 EM 3032 - 4 dB EM 3032 EM 3032 Loss dB EM 3032 Gain +20 dB Total 0 dB EM 3032 EM 3032
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EM 550
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? EM 550 Transformer balanced Output Built-in Power Supply
dBu adjustable Built-in Power Supply 90 – 260 Volt
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RF-Signal Distribution EM 550
U In = U Out - 8 dB OUT Mixer ANT IN Amp BPF IF-Amp - 2dB + 10 dB + 8 dB OSC
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EM 550 NEW ! Built in Antenna Distribution for up to 16 Channels
A B EM 550 NEW ! Built in Antenna Distribution for up to 16 Channels No external Splitter required !
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System Design dB Calculation Range Frequencies
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dB calculation 0 1 dB U1/U2 dB U1/U2 dB U1/U2 1 1,12 2 1,26 3 1,41
0 1 1 1,12 2 1,26 3 1,41 4 1,59 5 1,78 6 2,00 7 2,24 8 2,51 9 2,82 10 3,16 11 3,55 12 3,98 13 4,47 14 5,01 15 5,62 16 6,31 17 7,08 18 7,94 19 8,91 ,00 ,0 21 11,2 22 12,6 23 14,1 24 15,8 25 17,8 26 20,0 27 22,4 28 25,1 29 28,2 30 31,6 31 35,5 32 39,8 33 44,7 34 50,1 35 56,2 36 63,1 37 70,8 38 79,4 39 89,1 40 100 40 100 41 112 42 126 43 141 44 159 45 178 46 200 47 224 48 251 49 282 50 316 51 355 52 398 53 447 54 501 55 562 56 631 57 708 58 794 59 891
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Range / Power Receiver-Antenna 0 dB URX= 200 µV
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Intermodulation 2F2 - F1 2F1 - F2 F1 F2 IM 3 : IM 3 IM 3 500,8
F F2 IM 3 : 2F2 - F1 2F1 - F2 IM 3 IM 3 500,8 499,6 F (MHz) 500, ,4
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Receiver Intermodulation
RF-Gen. Freq.: F2 Receiver Freq.: IM 2xF2-F1 RF-Gen. Freq.: F1 = dB IM 1 µV F1 F2 IM
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Intermodulation Safety against IM 7 x more safety EM 1046
µV 3.000 µV 1.000 µV 300 µV 100 µV Antenna Level : 80 dB -- 70 dB -- 60 dB -- 50 dB -- 40 dB -- 7 x more safety EM 1046 3 x more safety EM 3532 2 x more safety EM 550 AKG Beyer Lectrosonic Micron Samson Shure Sony; TOA IM-Range of Competitors
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16 Freq´s in 24 MHz > 1700 IM-Products ! 16 Freq´s Min.carrier spacing : 400 KHz Min.IM spacing : 100 KHz
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InEar Transmitter Transmitter Antenna
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Omnidirectional Antenna
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RF Signals on Antenna
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Directional Antenna A 2003
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Receiver Blocking 1 2 RF-Gen. F: 800 MHz Mod.: 1 kHz Receiver RF-Gen.
Level for 26 dB S/N RF-Gen. F: 800 MHz Mod.: 1 kHz 800 MHz Receiver (800 MHz) RF-Gen. F: 799 MHz unmod. 799 MHz U1 / U 2 = Blocking 2 Level for 10 dB S/N 799 800 MHz
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? Receiver Blocking Blocking EK 3053 = 80 dB = 10.000 µV
Antenna Voltage in 15 cm distance to a 30 mW TX : = µV 20 dB Overload ?
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Receiver Blocking Bandfilter RF-PreAmp Ant 32 MHz
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Frequency Setup ----8 MHz----- Wireless Mic´s Wireless IEM F MHz
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? Receiver Intermodulation Antenna Voltage in 15 cm
distance to a 30 mW TX : = µV Intermodulation EK 3053 = 63 dB = µV 37 dB Overload ?
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In Ear - Frequencies 200 kHz IM-spacing = better IM-safety
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Multi-Channel IEM
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Transmitter IM with Telescopic Antenna
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Transmitter Combiner AC 1
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Multi-Channel InEar Monitoring
Antenna 4 x SR 300 AC 1
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Splitter 4 : 1 Transmitter Combiner AC 1 OUT + 10 dB IN - 8 dB - 2 dB
20 mW 20 mW 200 mW Splitter 4 : 1 + 10 dB - 2 dB IN BPF + 10 dB IN + 10 dB IN 12 V 1.5 A
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Transmitter IM with Telescopic Antenna
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Transmitter Signal at Combiner Output
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AC 3000
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InEar - Monitor IEM and wireless Microphones in separated Frequency Ranges -special calculated Frequencies for IEM (Non-Diversity / IM-safety) -active Antenna Combiner for multichannel use -external (directional) Antenna -short cable length between Transmitter and Antenna -minimum distance RX to TX-Antenna 4 m -Mono mode for critical conditions (wide range)
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