Technical Specifications:
Microphone Input:
- XLR, balanced, low noise
- 15V DC Phantom supply selectable
- Sensitivity: -70dBu
- Overload level -20dBu
Line-Level Input:
- 6.4 mm Jack socket, fully balanced (unbalanced with a mono plug)
- Sensitivity: -30dBu. Overload at +20dBu
- High Impedance Input
- Overload protected
Slave I/O:
- Connection point for AMPETRONIC Phase Shifter, Preamplifiers, etc.
- Can be used as output for recording purposes
- Signal level 1 V RMS (+2.7 dBu)
Preamp Power:
- ±15V DC for powering AMPETRONIC Microphone Preamplifiers and external processors
Metal Loss Detector:
- This control permits correction of system frequency response when losses occur due to metal in the building.
- Loss adjustment is adjustable from 0 to 3 dB per octave, using 1 kHz as constant gain frequency.
- This does not compensate for the power loss caused by the metal
Compressor / AGC Control:
- 36 dB control, with attack / decay time constants optimized for speech
- Front panel LED indication in 6 dB increments
Output Current:
- 7 Amp peak. Absolute peak current >10 A
- Front panel measurement by PPM
- response metering in 2dB increments
Output Voltage:
- Greater than 19 V peak, to enable good frequency response for larger loops
- Patented circuitry to prevent clipping
Area Coverage:
- Nominal area is a rectangular loop 250 m²
- Losses due to metal or unusual loop position can reduce this area
Loop Impedance:
- Designed for single-turn loops
- DC resistance between 0.3W and 1.2W nominal.
Loop Condition Testing:
- When power up the resistance of the loop is tested
- Resistance must be between 0.25W and 3W for the equipment to reach and active state
- Additional testing is performed for high loop resistance during normal operation using the normal audio signal
- A front LED panel indicates loop error
AC Power Input:
- 230 Volts AC, 50-60 Hz, 120 VA peak power
- Fuse: 230V 0.63A(T)
Ventilation/Cooling:
- Forced air ventilation is used with a side intake and rear exhaust
Dimensions:
- Width: 430 mm.
- Height: 44 mm.
- Depth: 220 mm.
- Rack mountable in 1U space
- Rack mounting brackets supplied
- Wall mounting is also available
The AMPETRONIC ILD252 Induction Loop Driver carries a full 5 year warranty.