Filter Box
- dual channel or bridged mode (up to 170V/RMS)
- 2 channel 80kHz 8th order lowpass filter
- 2 channel -30dB attenuator with 6dB steps
- ultra flat passband +/-0.05dB to 40kHz
- high linearity at high levels
The filter box is the perfect accesory when measuring Class-D, PWM or Sigma-Delta digital modulator type output stage amplifiers. The stop band response is greater than 70dB at 250kHz. Switching noise is thus highly reduced. This ensures highly accurate in-band measurements of the amplifier. The attenuator enables high measuring levels even on very sensitive analyzer inputs. This makes the Filter Box the perfect and universal tool for amplifier measurements. All components of the Filter Box are hand selected in our company to ensure best performance and high accuracy.
Technical Specs:
| Mode | dual single or bridged mode |
| Max level single mode | 80VRMS / channel |
| Max level bridged mode | 170VRMS |
| Input Impedance | 900Ω / channel |
| Output Impedance | 300Ω / channel |
| Filter structure | 80kHz Lowpass Butterworth |
| Linearity | +/-0.05dB up to 40kHz |