Signet PDA 1000/2 (1000m²) Induction loop amplifier

The Signet PDA 1000/2 professional current mode audio-frequency induction loop amplifier offers outstanding sound quality and unrivalled reliability at a competitive price. The PDA 1000/2 is ideal for use large rooms up to a maximum of 1000 square metres. The amplifier includes two XLR connectors- one balanced microphone input and one switchable balanced mic or line level input. Optional 11V phantom power is also available on both inputs to allow the use of condenser microphones.

The pre-amplification stage of each amplifier utilises an advanced signal processing system that allows tight control over the audio signal without any degradation of output quality. A metal compensation control is also provided to help offset the frequency response problems associated with the excessive metal content of some rooms.

Other features include three level controls (one for each input), a loop drive control, an output current meter and a ‘compression’ activity display giving visible indication of the amplifier’s compressor.

The amplifier also features a four-way ‘Outreach’ input offering full compatibility with SigNET’s unique Outreach Plate audio input extension system. This system allows the connection of up to 10 additional microphone or line level inputs via a range of specially designed single gang connector plates.

Features
Ideal for churches, meeting rooms, village halls, classrooms and other applications where top quality sound is a must
Attractive free-standing design (optional wall and 19” rack-mounting kits available)
Two XLR 3 pin input sockets – one balanced mic. and one switchable balanced mic./line
Optional 11V phantom power available for electret or condenser microphones
‘Outreach’ input allows the connection of up to 10 additional mic or line level inputs via a series of separately available single gang connector plates
Metal compensation control helps offset the frequency response problems associated with excessive metal in a building
True output current meter
Visible indication of the amplifier’s compressor action via two LEDs
3.5mm headphone socket allows monitoring of the output signal
Advanced audio signal processing with automatic gain control
Designed to meet or exceed the requirements of BS7594 andEN60118-4 (when correctly installed)

Delivery Includes
1 PDA 1000/2 Audio frequency induction loop amplifier
1 User instructions
1 IEC mains lead

Technical Data
Power 230-240 V a.c. mains (PDA1000/2 <300 VA). IEC 320 fused mains lead supplied)
Inputs Line (3 pin XLR) - impedance: 6k8 + or – input to ground; Sensitivity: 200mV – 2.5V RMS balanced or unbalanced.
Microphones (3 pin XLR) - impedance: 6k8 + or – input to ground; Sensitivity: 1 – 8 mV balanced
Phantom power: 12V switchable (on/off)
Outreach (Four-way Weidmuller connector BL5. 08/4) - impedance: >10k; Sensitivity: 500mV - 6V RMS balanced
Outreach Power: 16 – 21 V d.c. is available via the amplifier’s Outreach Socket.
Output type Current mode
Loop connector Four way binding posts
Recommended loop impedance: 0.5 – 1 Ohm @ 1KHz. Will drive higher impedance loops with reduced area of coverage.
Loop drive current @ 1 Ohm: PDA1000/2 – 12A.
Peak loop drive current (Measured over 5mS integration time): PDA1000/2 – 14 Amps @ 1 Ohm, 24 Amps @ 0.5 Ohm
Headphones: 3.5mm jack socket allows monitoring of the loop signal via >32 Ohm headphones.
Maximum area coverage: For a 400mA/M field strength +/- 1dB. PDA1000/2 @ 12A max short term current: Square room = 900m2; Rectangular room (2:1 aspect ratio) = 1100m2
Performance Frequency response: 20Hz – 14 KHz + - 3dB; Distortion: Less than 0.5 %; S to N ratio: Better than –65dB any input
Compressor: Gives dynamically variable compression ratio from 1:1 (no compression) to 17:1
Attack time: Approx. 10mS. Release time: Approx. 2.2S
Metal Compensation: True 3dB /octave design counteracts frequency dependent absorption by metal in the proximity of the
installation over a bandwidth of approximately 100Hz – 10KHz.
Indicators Power on LED: Red
Loop current: A five LED bar graph type meter is provided to allow monitoring of loop current output and
assist in setting up the amplifier. This is provided by monitoring true output current rather than from a line
level derived signal. This meter has PPM type characteristics i.e. fast attack and slow release. This allows easy
reading of fast peaks. Accuracy - +-10%
Compression: A two LED display is provided for indication of signal compression. The first LED shows the
beginning of compression whilst the second indicates very high compression levels have been reached.
Controls On/Off switch incorporated into IEC mains inlet.
Four way piano key style DIP switch selects Phantom power for mic 1 & 2 XLR inputs and switches XLR input 1
between Line and Microphone settings. The fourth of the 4-in-line switch is not connected.
Level controls for XLR 1 (Line/Mic switchable), XLR 2 (Mic) and Outreach.
These can be used individually or any of them together, in which case they act as a three input mixer.
Drive control: Sets the level of amplifier output current supplied by the amplifier.
Metal compensation control. When fully anti-clockwise has no effect on the signal. When turned clockwise imparts a rising 3dB/octave characteristic to the frequency response of the amp to counteract the effect of metal in proximity to the loop.
Cooling Requirements The thermostatically controlled cooling fan is activated when the amplifier’s internal heatsink temperature reaches approx. 56oC.
Dimensions All models: Length – 380mm; Depth – 220mm; Height – 80mm
Weight: 4.54Kg