DETAILED CPM-700 PROCEDURE
REI
CPM-700
30
has been made, you will hear the room’s audio. Check the phone
and the line to locate the microphone.
3.
You may wish to utilize the CPM-700 Monitor Mode since these
remotely controlled devices may not be operational during the
initial test.
MISC. WIRE / AUDIO EVALUATION
Listen to any ‘unknown’ wires and cables you discover to determine if they
are used for legitimate purposes, or as a conductor for audio surveillance.
Even though a wire has a legitimate purpose, do not assume it is safe.
Public-Address (P.A.) background music speakers, intercoms, computers,
desktop radios, and audio-monitored burglar alarms can all be used for
surveillance activities.
*WARNING! Before you attempt to connect the CPM-700 to an unknown
wire or cable you must determine if it contains a HAZARDOUS VOLTAGE.
Use a voltmeter to measure the AC voltage starting at a high range (250V)
and stepping down to a range that will show the line to be less than 50V.
Repeat using a DC voltage range before connecting the CPM-700
1.
After testing the wire or cable for any hazardous voltage, connect
the Auxiliary Input Patch Cord to the line to be tested. (You may
wish to use the FILTER to reduce AC hum.)
2.
Listen for your Known Sound Source or unusual modulations.
3.
You may change the GAIN settings to LOW (out) position if the
input sounds overloaded.
4.
In a multi-conductor cable, any two conductors can be used for
surveillance, whether or not paired. Every combination of two wires
must be tested to ensure no device is present.
NOTE: The RF Probe and the VLF Probe should also be used to detect RF
and very low RF frequencies present on telephone lines and on suspicious
wires and cables. See “RF PROBE” and “VLF PROBE” in this manual for
more information.