DP01 is a unique numbers station that uses both polytones and another digital mode, which is how it gets the name Digital Pseudo-Polytone. The digital mode is a QPSK modem with two channels utilizing a baud rate of 62.5 BD. There is a possibility that DP01 is not an actual numbers station though, and it is rarely heard.
DP01 was first discovered in 2008, but it went unnoticed for a long time until April 9th, 10th, and 11th. It was official given it’s ID on April 14th, 2014.
Message Recording
Station Structure
The station begins with a two-tone lead in (two minutes), a short tone sequence, then digital bursts, and ends with a 2nd short tone sequence
| DP01 Lead in tones | DP01 Digital Burst |
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Numbers Station Summary
Activity: Inactive, broadcasts for this station were somewhat rare.
Emission Mode: USB
Believed Country of Origin: Russia
Sources
ENIGMA 2000 Newsletter Issue #82, May 2014 Pages 2-6
ENIGMA Control List V1.3
