EM 100 G4
RF characteristics Modulation Wideband FM
Frequency ranges A1: 470 – 516 MHz
A: 516 – 558 MHz
AS: 520 – 558 MHz
G: 566 – 608 MHz
GB: 606 – 648 MHz
B: 626 – 668 MHz
C: 734 – 776 MHz
D: 780 – 822 MHz
E: 823 – 865 MHz
JB: 806 – 810 MHz
K+: 925 – 937.5 MHz
1G8: 1785 – 1800 MHz
Receiving frequencies Max. 1680 receiving frequencies, adjustable in 25 kHz steps
20 frequency banks, each with up to 12 factory-preset channels, no intermodulation
1 frequency bank with up to 12 programmable channels

Switching bandwidth up to 42 MHz
Nominal/peak deviation ±24 kHz / ±48 kHz
Receiver principle True diversity
Sensitivity (with HDX, peak deviation) < 2.5 μV for 52 dBA eff S/N
Adjacent channel selection Typically ≥ 65 dB
Intermodulation attenuation Typically ≥ 65 dB
Blocking ≥ 70 db
Squelch low: 5 dBμV
middle: 15 dBμV
high: 25 dBμV
Pilot tone squelch Can be switched off
Antenna inputs 2 BNC sockets

AF characteristics
Compander system Sennheiser HDX
EQ presets (switchable, act on line and monitor outputs)
Preset 1: Flat
Preset 2: Low Cut (-3 dB at 180 Hz)
Preset 3: Low Cut/High Boost (-3 dB at 180 Hz,+6 dB at 10 kHz)
Preset 4: High Boost (+6 dB at 10 kHz)

Signal-to-noise ratio (1 mV, peak deviation) ≥ 110 dBA

Total harmonic distortion (THD) ≤ 0.9 %
AF output voltage (at peak deviation, 1 kHz AF)
6.3 mm jack socket
(unbalanced): +12 dBu
XLR socket
(balanced): +18 dBu
Setting range “AF Out” 48 dB (3 dB steps)

Overall device
Temperature range -10 °C to +55 °C
Power supply 12 V DC
Current consumption 300 mA
Dimensions Approx. 190 x 212 x 43 mm
Weight Approx. 980 g

SKM 100 G4-S
RF characteristics
Modulation Wideband FM
Frequency ranges A1: 470 – 516 MHz
A: 516 – 558 MHz
AS: 520 – 558 MHz
G: 566 – 608 MHz
GB: 606 – 648 MHz
B: 626 – 668 MHz
C: 734 – 776 MHz
D: 780 – 822 MHz
E: 823 – 865 MHz
JB: 806 – 810 MHz
K+: 925 – 937.5 MHz
1G8: 1785 – 1800 MHz
Transmission frequencies Max. 1680 receiving frequencies, adjustable in 25 kHz steps.
20 frequency banks, each with up to 12 factory-preset channels, no intermodulation.
1 frequency bank with up to 12 programmable channels.

Switching bandwidth up to 42 MHz
Nominal/peak deviation ±24 kHz / ±48 kHz
Frequency stability ≤ ±15 ppm
RF output power at 50 Ω Max. 30 mW
Pilot tone squelch Can be switched off

AF characteristics
Compander system Sennheiser HDX
AF frequency response 80 – 18,000 Hz
Signal-to-noise ratio (1 mV, peak deviation) ≥ 110 dBA
Total harmonic distortion (THD) ≤ 0.9 %
Max. input voltage 3 Veff
Input impedance 40 kΩ
Input capacitance Switchable
Setting range for input sensitivity 48 dB, adjustable in 6 dB steps

Overall device
Temperature range -10 °C to +55 °C
Power supply 2 AA batteries, 1.5 V or BA 2015 accupack
Nominal voltage 3 V battery / 2.4 V rechargeable battery
Current consumption at nominal voltage: typ. 180 mA with transmitter switched off: ≤ 25 μA
Operating time Typically 8 h
Dimensions Approx. Ø 50 x 265 mm
Weight (incl. batteries) approx. 450 g

MMD 945-1
Transducer principle dynamic
Sensitivity 1.8 mV/Pa
Sound pressure level 154 dB SPL
Pick-up pattern supercardioid