EM 300-500 G4

ARCHITECT‘S SPECIFICATION

The stationary receiver with true diversity technology shall be for use with a companion transmitter as part of a wireless RF transmission system. The receiver shall operate within ten UHF frequency ranges, with a switching bandwidth of up to 88 MHz: 470 – 558 MHz, 520 – 558 MHz, 558 – 608 MHz, 558 – 626 MHz, 606 – 678 MHz, 626 – 698 MHz, 718 – 790 MHz, 790 – 865 MHz, 806 – 810 MHz, 925 – 937.5 MHz; receiving frequencies shall be 3520 per range and shall be tunable in 25 kHz steps. The receiver shall feature 20 fixed frequency banks with up to 32 compatible frequency presets and 6 user banks with up to 32 user programmable frequencies.

The receiver shall be menu-driven with a backlit OLED display showing the current frequency, frequency bank and channel number, metering of RF level, metering of AF level, lock status, pilot tone evaluation, muting function, and battery status of the associated transmitter. An auto-lock feature shall be provided to prevent settings from being accidentally altered. The receiver shall provide a sound check mode.

Some receiver parameters such as receiving frequency, receiver name and pilot tone setting shall be synchronizable with the associated transmitter via an integrated infrared interface.

The receiver shall feature a balanced XLR-3M audio output with a maximum output of +18 dBu along with an unbalanced ¼" (6.3 mm) audio output with a maximum output of +12 dBu. A headphone output with headphone volume control shall be provided and shall utilize a ¼" (6.3 mm) stereo jack socket. The receiver shall have an Ethernet port (RJ-45) for remote network-based monitoring and control using the Sennheiser Control Cockpit or the Sennheiser Wireless System Manager software. Two BNC-type input sockets shall be provided for connecting the antennas.

Nominal/peak deviation shall be ±24 kHz/±48 kHz. Squelch threshold shall be defeatable (off) or adjustable from 5 - 25 dBμV in steps of 2 dB.

The receiver shall incorporate the Sennheiser HDX compander system and a defeatable pilot tone squelch. Sensitivity shall be < 2 μV for 52 dBA eff S/N with HDX engaged at peak deviation. Adjacent channel rejection shall be ≥ 75 dB (typical). Intermodulation attenuation shall be ≥ 70 dB (typical); blocking shall be ≥ 75 dB. Four selectable equalizer presets shall be provided: “Flat”, “Low Cut” (−3 dB at 180 Hz), “Low Cut/High Boost” (−3 dB at 180 Hz/+5.5 dB at 10 kHz) and “High Boost” (+5.5 dB at 10 kHz). Signal-to-noise ratio at 1 mV and peak deviation shall be ≥ 115 dBA. Total harmonic distortion (THD) shall be ≤ 0.9 %. The audio output level shall be adjustable within a 48 dB range in steps of 3 dB.

The receiver shall operate on 12 V power supplied from the NT 2-3 CW mains unit (for 100 – 240 V AC, 50/60 Hz). Power consumption shall be 350 mA. The receiver shall have a rugged metal housing; dimensions shall be approximately 202 x 212 x 43 mm (7.95" x 8.35" x 1.69"). Weight shall be approximately 980 grams (2.16 lbs). Operating temperature shall range from −10 °C to +55 °C (+14 °F to +131 °F).

The receiver shall be the Sennheiser EM 300-500 G4.

SPECIFICATIONS

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. 3520 receiving frequencies, adjustable in 25  kHz steps 20 frequency banks, each with up to 32 factory-preset channels, no  intermodulation 6 frequency banks with up to 32 programmable channels Switching bandwidth: up to 88 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