Tekbox TBFL1
/ Transient limiter / attenuator / high-pass filter, 9kHz-600MHz

The TBFL1 is a combined transient limiter, attenuator and high-pass filter in one. It is looped into the signal path to optimally protect the input of a spectrum analyzer or measuring receiver. This is especially true for the measurement of conducted interference or other measurements where the input level cannot be predicted or accidental overloading can occur. So-called PIN and Schottky diodes in combination with a multi-stage 10 dB attenuator result in a device that can withstand a continuous RF input level of up to 5 W (37 dBm). A gas discharge tube offers additional protection against high-voltage transients. In addition, the 9 kHz high-pass filter suppresses harmonics resulting from the mains voltage. With a threshold level of +11 dBm and a flat frequency response in the range 9 kHz to 600 MHz, the TBFL1 can be used universally in the entire range of conducted interference and many other applications.
Application examplesGeneral application for limiting high-energy RF pulses Transient limiter for measuring conducted interference Features Frequency range: 9 kHz to 600 MHz Attenuation: 10 dB – 0.5/+1.2 dB in-band (9 kHz..600 MHz) Attenuation high-pass filter: > 30 dB @ 2 kHz Maximum continuous RF input power: 5 W (+37 dBm) in-band Maximum DC input voltage: ±20 V Input matching, linear operating range: 9 kHz..600 MHz < -16 dB Input matching, linear operating range: 9 kHz..600 MHz < -23 dB Linear operating range: up to 0 dBm Input level, in-band Threshold: +11 dBm (@ 37 dBm input level) Input connection: N-socket Output connection: N-plug Dimensions: 156 mm x 26 mm x 26mm Weight: 170 g Delivery scopeTransient limiter/attenuator/high-pass filter in wooden box