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ALD Division
© GN ReSound ALD Division 2004
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Pedagog PhaseShift 90°
Pedagog PhaseShift 90°
Pedagog PhaseShift 90° is a combined FM receiver and loop amplifier. It is primarily used in schools and meeting halls. It is easy to maintain, and can be mounted on the wall. The teacher wears a wireless microphone, which transmits the sound to Pedagog PhaseShift 90°. There, the sound is amplified and transfered to the induction loop. Students only need to switch their hearing aid to the T or MT position.

Two wireless microphones may be used at the same time with Pedagog PhaseShift 90°. Additional microphones can be used simultaneously when special connections are made.

Add an external Transett 32 PhaseShift 180° to the system, and you get a phase shifted loop with a minimum of leakage.
Last updated February 21, 2008
Ordering number: 412 08 25
Technical data
Receiver  
RF frequency: 35-50 MHz.
Number of channels:  16.
Channel spacing: 200 KHz.
Modulation: FM.
Deemphasis: 50 µs.
Squelch: Adjustable between 0.5 µV-1 V.
Squelch attenuation: >60 dB.
Distortion: <1.5 % at ± 15 KHz swing.
Amplifier  
Power supply: 210-264 V  50-60 Hz, nominally 230 V.
Inputs: Microphone 1 and 2: <0.8 mV/8 kΩ. 30 dB sensitivity adjustment. Balanced input with phantom supply, 15 V. XLR connector, male. Line in 1 and 2: level <50 mV/20 kΩ. 30 dB sensitivity adjustment. Electronically balanced. 6.3 mm connector, female. Line in 3a and 3b: level <600 mV/45 kΩ. 30 dB sensitivity adjustment. Electronically balanced. 5-pole DIN connector.
Outputs: ANT 1/LOOP: 30 VA into 1,5 Ω loop resistance. XLR connector, female.
LINE out 3a: 1.2 V. 5-pole DIN connector.
LINE out 3b: 600 mV. 5-pole DIN connector.
LINE out: Alternative output (3.5 mm) for transmitter, 100 mV.
Distortion: 1% at 30 VA.
Frequency range: 100-8000 Hz, -3 dB relative 1000 Hz. Roll off > 6 dB/octave above 8000 Hz.
Signal/Noise ratio: > 50 dB for microphone inputs, > 60 dB for line inputs.
Treble boost: > 4 dB at 4000 Hz relative to 1000 Hz. Turnover point at 2000 Hz.
Bass boost: > 4 dB at 200 Hz relative to 1000 Hz. Turnover point at 500 Hz.
AGC: 40 dB dynamic range. (Used for maintaining constant mean loop current.) Attack time: 30 ms. Decay time: 30 s. Jumper adjustable.
Overload protection: Thermal, reduces output current.
Power requirement: Max 70 VA.
Weight: 2.4 kg.
Operating temperature range: 10-40°C.