1. Receiver 1. Diversity Operation 2. Type of Antenna
3. Antenna Signal Distribution

2.    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

3. 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

4. Antenna Splitter Distribution Loss - 4 dB Splitter 1 : 2 ASP 212

5. 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

6. Antenna Splitter ASP 1
1 x 1 : 8
1 : 2
4 dB
- 8dB
1 : 4
1 : 4

7. ? Splitter 1 : 12 1 : 2 - 7 dB 1 : 3 1 : 4 1 : 4 1 : 4 - 8 dB
Total loss dB

8. 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

9. EM 550

10. ? EM 550 Transformer balanced Output Built-in Power Supply
dBu adjustable
Built-in Power Supply
90 – 260 Volt

11. 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

12. 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 !

13. System Design
dB Calculation
Range
Frequencies

14. 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

15. Range / Power
Receiver-Antenna
0 dB URX= 200 µV

16.     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

17. Receiver Intermodulation
RF-Gen.
Freq.: F2
Receiver
Freq.:
IM 2xF2-F1
RF-Gen.
Freq.: F1
= dB IM
1 µV F1 F2 IM

18. Intermodulation Safety against IM 7 x more safety EM 1046µV
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

19. 16 Freq´s in 24 MHz
> 1700
IM-Products !
16 Freq´s
Min.carrier spacing : 400 KHz Min.IM spacing : 100 KHz

20. InEar Transmitter
Transmitter Antenna

21. Omnidirectional Antenna

22. RF Signals on Antenna    

23. Directional Antenna
A 2003

24. 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

25. ? 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 ?

26. Receiver Blocking
Bandfilter
RF-PreAmp
Ant
32 MHz

27. Frequency Setup
----8 MHz-----
Wireless Mic´s
Wireless IEM
F MHz

28. ? Receiver Intermodulation Antenna Voltage in 15 cm
distance to a 30 mW TX :
= µV
Intermodulation EK 3053 = 63 dB
= µV
37 dB Overload ?

29. In Ear - Frequencies
200 kHz IM-spacing = better IM-safety

31. Multi-Channel IEM   

32. Transmitter IM with Telescopic Antenna

33. Transmitter Combiner AC 1

34. Multi-Channel InEar Monitoring
Antenna
4 x SR 300
AC 1

35. 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

36. Transmitter IM with Telescopic Antenna

37. Transmitter Signal at Combiner Output

38. AC 3000

39. 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)