ST 500 "Piranha" Operation Manual: Use Guidelines
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Actions with the test sound source:
1. Turn on the test sound source.
2. Decrease the sound volume.
3. Carry the test sound source slowly around the room.
ST 500 operator procedure:
1. Activate "LFA" or "WR" (in whichever the transmission channel has been detected).
2. Connect the headphones, and listen to the sound background in the room.
2. Select the wire pair at which the test sound is audible
3. Find the spot where the test sound is the loudest
9.5.2. LOCALIZATION WITH ST 500 AND NONLINEAR JUNCTION DETECTOR (NLJD)
This method can only be used to locate
devices that incorporate electronic parts.
The
procedure requires two people, one going the length of the cabling while pointing the active non-
linear junction detector's antenna at it, and the other monitoring with ST 500 any response to the
NLJD's irradiation from the cable.
Any electronics that are close to the cabling but not connected to it, in the proximity of the
antenna will yield responses on the 2
nd
and 3
rd
harmonics; this will be registered by the non-
linear locator operator, but not the operator of ST 500.
However, if the operator of ST 500 hears a typical signal from the NLJD through the
headphones, this will mean that the NLJD's antenna is being pointed at an eavesdropping device
directly connected to the circuit.
This method is most effective when using NLJD
"SEARCH" mode.
NonLJD operator procedure:
1. Disconnect all consumer devices from the cabling.
2. Turn on "CAYMAN" NLJD and set it to "SEARCH".
3. Connect the headphones or minimize the volume of the built-in speaker.
4. Move along the cable while pointing the NLJD's antenna at it.
ST 500 operator procedure:
1.
Connect ST 500 to the circuit.
2.
Turn on ST 500.
3.
Activate the channel ("LFA" or "WR") in which the suspect signal was detected.
4.
In the table, select the wire pair at which the suspect signal was detected.
5.
Connect the headphones.
6.
Listen for a typical signal from the NLJD.
