DRT 1183B

Survey Equipment

“Intercept and record digital voice data”

Review by Jennifer Lynch

Senior Staff Attorney, Electronic Frontier Foundation

Are you trying to monitor a huge political protest? Look no further than DRT. Nicknamed “dirt boxes,” these devices can locate up to 10,000 targets and can process multiple analog and digital wireless devices all at the same time. They’re even capable of intercepting and recording digital voice data. The best thing about the devices is the fact that no one may ever know you’ve used one. Just be careful — if your targets do figure out you’ve used a DRT box, and you haven’t gotten a warrant, they may be able to convince a judge to throw out all the evidence you’ve collected on them after you used the device.


The DRT 1183 provides a powerful surveillance capability against a variety of analog and digital wireless standards. The DRT1183 can be configured to support DF, digital voice intercept/recording, supports target lists of up to 10,000 entries, and has a flexible tuner configuration which provides frequency coverage of all bands of interest. Up to four tuners can be incorporated in unit.

Limitations and Planning Factors

- Flexible tuner configuration provides frequency coverage of all bands of interest. - RFT3: Dual channel transceiver VHF/UHF coverage from 2-3000 MHz; HF from 0.5 - 32 MHz - HFT1: High performance HF receiver from 0.2-3- MHz - MUT1: Microwave receiver from 0.2-8.5 GHz - FPGA based Wireless Processor, WPM3, enables wideband signal processing. Can also generate a 32+ narrowband signals


Digital Receiver Technologies
Germantown, Maryland-based DRT produces communications test and measurement equipment. It is a subsidiary of Boeing Integrated Defense Systems. Known by the nickname “dirt boxes,” DRT devices are cell-site simulators used for land-based or airborne capture of cellphone data. — Margot Williams, The Intercept




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