TEKBOX TBMDA4 Modulated Wideband Power Amplifier

£790.00 (£948.00 inc VAT)

Only 1 left in stock!

Availability: Stock models delivered next working day (UK only) for orders placed before 15:00 (Mon - Fri)

SKU: TBMDA4 Categories: , , ,


The TBMDA4 modulated wideband power 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 an input power range of -5 dBm…0 dBm, it can boost the output power of a tracking generator up to 5W. With a frequency range from 100 kHz to 50 MHz, it is an ideal complement to the TBMDA3, which covers 10 MHz to 1 GHz. The TBMDA4 is ideal to drive Tekbox near field probes in order to find the sensitive spot of an electronic circuit or to create electric fields up to 550V/m when driving the Tekbox TEM Cell TBTC0, 300V/m when driving the TBTC1, 150V/m when driving the TBTC2 or 100V/m when driving the TBTC3. Test signals for immunity testing can be CW, AM or PM modulated. Consequently, the TBMDA4 provides built in modulation capability to generate 1 kHz AM or PM signals. In PM mode, the TBMDA4 can also generate a 217 Hz Signal with 12.5% duty cycle in order to simulate mobile phone TDMA noise.

The following items are included:

  • 1-off modulated power amplifier
  • 2-off RF cables – N(m) to N(m), 75cm
  • 1-off RF attenuator – 30dB, 10W, N-type connectors
  • 1-off power lead


  • 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, N female
Supply Voltage range 110 V…240 V
Supply power consumption 20 W
Operating temperature range -20°C to 50°C
Frequency range 100 kHz – 50 MHz
1dB output compression point @ 1 MHz +35.5 dBm typ.
1dB output compression point @ 10 MHz +36 dBm typ.
1dB output compression point @ 50 MHz +36.5 dBm typ.
2nd harmonic, 20 MHz, Pout=36dBm < – 15 dBc typ.
2nd harmonic, 25 MHz, Pout=30dBm < – 20 dBc typ.
3rd harmonic, 25 MHz, Pout=36dBm < – 25 dBc typ.
3rd harmonic, 25 MHz, Pout=30dBm < – 30 dBc typ.
Total harmonic distortion 6.7% @25MHz, Pout=27dBm typ.
8.5% @25 MHz, Pout=30 dBm typ.
12% @25 MHz, Pout=33 dBm typ.
15% @25 MHz, Pout=36 dBm typ.
Third order intercept point +53dBm, @25 MHz, ∆ f = 200kHz typ.
Noise figure 9 dB
Internal modulation frequency AM 1 kHz ±20%
Internal modulation frequencies PM 1 kHz ±10%, 217 Hz ±20%
Duty cycle, PM 50% ±10% @ 1 kHz; 12.5% ±20% @ 217 Hz
Maximum input power  0 dBm
50kHz 100kHz 500kHz 1MHz 5MHz 10MHz 25MHz 50MHz 70MHz
39.3 dB 44.9 dB 47.1 dB 47.2 dB 47.3 dB 47.5 dB 48.6 dB 49.9 dB 44.5 dB


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