Product Description:
The LFPA 9733 C is the latest low frequency magnetic power amplifier introduced by SCHWARZBECK in April 2025, the LFPA 9733 C is a discontinued LFPA 9733 B The LFPA9733C is the latest upgrade and replacement version of the LFPA9733C. Capable of outputting up to 14Arms RMS current in the low frequency range of 5Hz-1MHz, the LFPA9733C's typical application is low frequency magnetic field immunity testing according to the automotive standard ISO11452-8 and the military standard MIL-461. Its new output stage design enables higher outputs in the high frequency range, in addition to galvanically isolated inputs, and in addition, it can handle asymmetric signals (as defined by GMW 3097).
Technical parameters：
<<<<提醒：左右滑动表格>>>>| Product model | LFPA 9733 C |
| Product name | low frequency power amplifier |
| manufacturer | Schwarzbeck Germany |
| agent | EUTTEST Shenzhen |
| Test frequency range | 5Hz-1MHz |
| Output Gain | 26dB±3dB |
| AC Output Current | 14 A RMS 28 A RMS |
| Load Impedance | 0.25 Ohm |
| DC Output Current | 10A |
| Maximum Output Voltage | 60 Vpeak @ 5 Hz - 250 kHz frequency range 30 Vpeak @ 1 MHz frequency range |
| Maximum Output Current | 40A peak |
| Input Input Impedance | 1kΩ |
| connector | BNC |
| size | 448 x 473 x 280 mm |
| weight | 40 kg |
Design features of the LFPA 9733 C:
Compared to off-the-shelf audio amplifiers, the LFPA 9733C is designed for high duty cycle operation at high loads. As a result, there is a significant increase in size and weight compared to typical power amplifiers. However, in order to keep the weight and size of the amplifier within reasonable limits, it is not possible to design the amplifier for continuous operation at maximum output current. As a result, the amplifier design greatly exceeds the requirements of typical immunity tests. The coupling transformer used for conducted immunity testing with the LFPA 9733C operates in both directions. Therefore, it couples the reverse power from the EuT supply into the amplifier. Due to the internal feedback circuitry, the amplifier will be convected to the external drive current with a power dissipation of approximately 100 watts per ampere. Note that the voltage is not important because the amplifier's feedback will keep the output near zero volts.
The display of the LFPA 9733 C will show the firmware version, output voltage, output current and the temperature of the transformer/output stage. When the amplifier is turned on, the signal inputs will be muted. This will be shown on the bottom line of the display.
The display of the LFPA 9733 C shows information such as voltage and current.
For more information on low frequency magnetic field immunity testing, click on the following link:
ISO 11452-8 Low Frequency Magnetic Field Immunity Test System
