TekBox Modulated Wideband Driver Amplifier (TBMDA2)


The TBMDA2 modulated wideband driver amplifier is designed in order to create an inexpensive signal source for immunity testing of electronic building blocks and products.

It is designed to be driven by the tracking generator output of spectrum analyzers. With its 1dB compression point of +27dBm, it can boost the output power of a tracking generator up to 500mW. The TBMDA2 is ideal to drive near field probes in order to find the sensitive spot of an electronic circuit or to create electric fields up to 170V/m when driving the TEM Cell TBTC0, 100V/m when driving the TBTC1, 50V/m when driving the TBTC2 or 30V/m when driving the TBTC3. Test signals for immunity testing can be CW, AM or PM. Consequently, the TBMDA2 provides built in modulation capability to generate 1 kHz AM or PM signals. In PM mode, the TBMDA2 can also generate a 217 Hz Signal with 12.5% duty cycle in order to simulate mobile phone TDMA noise.


  • CW amplifier (modulation off)
  • 1 kHz, 80% AM modulation
  • 1 kHz, 50% duty cycle pulse modulation
  • 217 Hz, 12.5% duty cycle pulse modulation


Input / Output: 50 Ohm, SMA female
Nominal supply Voltage: 5V, typ. 700mA, Mini-USB-B connector
Maximum supply voltage: 5.5V
Maximum input power: -8dBm continuous, 0 dBm @ 25°C for 5 minutes max. Operating temperature range: -20°C to 50°C
Frequency range: 10MHz – 1.5 GHz
1dB output compression point @ 10MHz: +24 dBm typ.
1dB output compression point @ 100 MHz: +27 dBm typ.
1dB output compression point @ 1 GHz: +27 dBm typ.
1dB output compression point @ 1.5 GHz: +26.5 dBm typ.
Harmonics: < – 30 dBc typ.
Internal modulation frequency AM: 1 kHz ±10%
Internal modulation frequencies PM: 1 kHz ±10%, 217 Hz ±20%
Duty cycle, PM: 50% ±10% @ 1 kHz; 12.5% ±20% @ 217 Hz


10 MHz25 MHz100 MHz200 MHz300 MHz400 MHz500 MHz600 MHz700 MHz
44.2 dB46.3 dB46.7 dB46.6 dB45.3 dB44.2 dB43.8 dB42.9 dB41.7 dB


800 MHz900 MHz1 GHz1.1 GHz1.2 GHz1.3 GHz1.4 GHz1.5 GHz
39.6 dB40.1 dB39.3 dB38.5 dB37.3 dB36.8 dB35.9 dB34.8 dB


  • General-purpose gain block
  • Signal source for immunity testing, driving near field probes
  • Signal source for immunity testing, driving TEM Cells


Weight.3 kg
Dimensions16 × 16 × 4 cm