Tekbox TBMDA7 amplifier
Details
The Tekbox TBMDA7 is a modulated wideband driver amplifier designed to be driven by the tracking generator output of spectrum analysers. Still, it can also be used as a general-purpose gain block. This way you can create an inexpensive signal source (e.g. CW, AM, PM) for immunity testing of electronic building blocks. Its 1 dB compression point of +27 dBm can boost the output of a tracking generator up to 500 mW of power. This unit has a built-in modulation capability to generate 1 kHz of AM or PM signals. Furthermore, in PM mode, it can generate a 217 Hz signal at a 12.5% duty cycle to simulate mobile phone TDMA noise.
Both input and output are standard SMA connectors, rated at 50 Ω. The amp is powered by a Mini-USB-C port on the back side of the device. Supplying through a USB 3.0 port or a charger rated 1 A or higher is recommended.
A nice addition to this device is the Tekbox EMCview PC application which supports immunity testing with a feature for automated tracking generator control, which significantly simplifies immunity testing, especially in case of repeated testing during validation of DUT modifications/improvements. The software is supported by Rigol, Siglent and R&S FPC/FPH series spectrum analysers.
Please be cautious not to directly hook up the output of the device to a spectrum analyser. Reference the maximum input ratings of your spectrum analyser and use an appropriate attenuator.
Specifications
| Bandwidth | 1 GHz - 3 GHz |
| Max input power | -5 dBm continuously, 0 dBm @ 25°C for 5 minutes |
| 1 dB output compression point (typ.) | +24 dBm (1000 MHz) +26.3 dBm (1500 MHz) +28 dBm (2000 MHz) +29.3 dBm (2500 MHz) +27.3 dBm (3000 MHz) |
| Harmonics | < -15 dBc (typ.) @ 1.5 GHz |
| Internal modulation frequencies | AM: 1 kHz ±10% PM: 1 kHz ±10%, 217 Hz ±20% |
| Duty cycle (PM) | 50% ±10% @ 1 kHz 12.5% ±20% @ 217 Hz |
| Gain |
33,9 dB @ 1000 MHz 35,2 dB @ 1250 MHz 36,4 dB @ 1500 MHz 37,7 dB @ 1750 MHz 38,7 dB @ 2000 MHz 39,5 dB @ 2250 MHz 39,6 dB @ 2500 MHz 39.3 dB @ 2750 MHz 37,9 dB @ 3000 MHz (download the manual for specific values) |
| Supply | USB-C (5V, 800 mA) |
Accessories
The TBMDA7 comes by default with:
- 2x SMA-male to N-male cable (75 cm)
- 1x 20 dB attenuator with N connector
- USB cable
Pros and cons
- Suitable for a TEM cell
- Requires adequate USB power source
Downloads
| TBMDA7 manual |  (670.2 KB) | Download |
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