SPECIFICATIONS
EM500 G4

RF characteristics
Modulation Wideband FM
Frequency ranges Aw+: 470 – 558 MHz
AS: 520 – 558 MHz
Gw1: 558 – 608 MHz
Gw: 558 – 626 MHz
GBw: 606 – 678 MHz
Bw: 526 – 698 MHz
Cw: 718 – 790 MHz
Dw: 790 – 865 MHz
JB: 806 – 810 MHz
K+: 925 – 937.5 MHz
Receiving frequencies Max. 2880 receiving frequencies, adjustable in 25 kHz steps
20 frequency banks, each with up to 32 factory-pre-set channels, no intermodulation
6 frequency banks with up to 32 programmable channels
Switching bandwidth up to 72 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 ≥ 75 dB
Intermodulation attenuation Typically ≥ 70 dB
Blocking ≥ 75 dB
Squelch 5 to 25 dBμV in steps of 2 dB
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) ≥ 115 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 350 mA
Dimensions Approx. 202 x 212 x 43 mm
Weight Approx. 980 g

SKM 500 G4

RF characteristics
Modulation Wideband FM
Frequency ranges Aw+: 470 – 558 MHz
AS: 520 – 558 MHz
Gw1: 558 – 608 MHz
Gw: 558 – 626 MHz
GBw: 606 – 678 MHz
Bw: 526 – 698 MHz
Cw: 718 – 790 MHz
Dw: 790 – 865 MHz
JB: 806 – 810 MHz
K+: 925 – 937.5 MHz
Transmission frequencies Max. 2880 frequencies, adjustable in 25 kHz steps
20 frequency banks, each with up to 32 factory-pre-set channels, no intermo-
dulation
6 frequency banks with up to 32 programmable channels
Switching bandwidth up to 72 MHz
Nominal/peak deviation ±24 kHz / ±48 kHz
Frequency stability ≤ ±15 ppm
RF output power at 50 Ω switchable:
Low: typ. 10 mW
Standard: typ. 30 mW
High: typ. 50 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) ≥ 115 dBA
Total harmonic distortion (THD) ≤ 0.9 %
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