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68
Specifications
RF characteristics
Modulation wideband FM
Frequency ranges 518–554, 626–662, 740–776, 786–822, 830–866 MHz
Receiving frequencies
8 channel banks with up to 20 factory-preset channels each
1 channel bank with up to 20 freely selectable channels
(1,440 frequencies, tunable in steps of 25 kHz)
Switching bandwidth 36 MHz
Nominal/peak deviation ±24 kHz / ±48 kHz
Frequency stability ≤ ±15 ppm
Receiver principle true diversity
Sensitivity (with HDX, peak deviation)
typ. 1.5 µV at 52 dBA
rms
S/N ratio
Adjacent channel rejection ≥ 70 dB
Intermodulation attenuation ≥ 70 dB
Blocking ≥ 80 dB
Squelch
4 steps: Off
Low: 5 dBµV
Mid: 15 dBµV
High: 25 dBµV
Pilot tone squelch can be switched off
Antenna inputs 2 BNC sockets (50 Ω)
Cascading outputs 2 BNC sockets (50 Ω)
gain: 0 dB ±2 dB (related to antenna inputs)
AF characteristics
Noise reduction system Sennheiser HDX
EQ presets (switchable, effect the line and
monitor outputs):
Preset 1: “Flat“ AF frequency response 40–18,000 Hz
Preset 2: “Low Cut“ Cut approx. -3 dB at 200 Hz
Preset 3: “HiBoost“ Boost approx. +6 dB at 10,000 Hz
Preset 4: “Low Cut & Hi Boost“ Cut
Boost
approx. -3 dB at 200 Hz
approx.+6 dB at 10,000 Hz
S/N ratio (at 1 mV and peak deviation) ≥ 115 dB(A) (AF OUT)
THD (at nominal deviation and 1 kHz) ≤ 0.9 %
AF output voltage
(at peak deviation 1 kHz
AF
)
+18 dB
to –22 dB
u
, adjustable in steps of 2 dB
(transformer balanced)
AF outputs 2 XLR-3M sockets
Overall unit
Temperature range –10 °C to +55 °C
Power supply 90–264 V AC
Mains connector 3-pin; protection class I
Booster supply voltage 11 V DC, cannot be switched off
Max. booster current ≤ 150 mA (limited per antenna socket)
Power consumption 40 VA
Dimensions [mm] 436 x 215 x 43
Weight approx. 3,500 g
EM_550_G2.book Seite 68 Donnerstag, 27. November 2003 1:33 13
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