NSA Device – CTX4000

(TS//SI//REL TO USA,FVEY) The CTX4000 is a portable continuous wave (CW) radar unit. It can be used to illuminate a target system to recover different off net information. Primary uses include VAGRANT and DROPMIRE collection.


(TS//SI//REL TO USA,FVEY) The CTX4000 provides the means to collect signals that otherwise would not be collectable, or would be extremely difficult to collect and process. It provides the following features:

  • Frequency Range: 1 – 2 GHz.
  • Bandwidth: Up to 45 MHz
  • Output Power: User adjustable up to 2 W using the internal amplifier; external amplifiers make it possible to go up to 1 kW.
  • Phase adjustment with front panel knob
  • User-selectable high- and low-pass filters.
  • Remote controllable
  • Outputs:
  • Transmit antenna
  • I and Q video outputs
  • DC bias for an external pre-amp on the Receive input connector
  • Inputs:
    External oscillator
    Receive antenna


Unit Cost: N/A

Status: unit is operational. However, it is reaching the end of its service life. It is scheduled to be replaced by PHOTOANGLO staring in September 2008.


Thank you for taking the time to read this article! As always keep the faith!

The NSA’s original documentation on CTX4000



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Preston Hood
Hello, my name is Preston Hood. I am the owner of PJHoodsCo, an Information Technology Service Provider (ITSP). I am also a freelance writer and information security researcher.
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