3
LOOPBACK INPUT
The DNG-2300 has an input LOOPBACK which allows easy and fast tuning to the necessary level
of noise. Optional probe microphone DNG-MIC and probe stethoscope DNG-STET are used for
the required measurements.
SUPPLIED SET
The DNG-2300 is supplied with AC power cable and user manual. The TRN-2000 and the OMS-
2000 are sold separately. Their quantity depends on the room size and the situation. The probe
microphone DNG-MIC and the probe stethoscope DNG-STET are also sold separately.
REMARKS REGARDING PREPARATION
This instruction manual covers the installation, wiring, and testing of the DNG-2300. Because the
DNG-2300 protects the perimeter of the target area, devices which may be planted in close
proximity to the target speaker’s voice may not be jammed by the DNG-2300 system. Therefore
prior to the installation of the DNG-2300 it is recommended to perform thorough sweep
accompanied by a physical search.
When performing detection and location the following tools can be used: radio field indicators (bug
detectors), interceptors, frequency counters, counter surveillance probes, spectrum analyzers, etc.
Contact your dealer for help in choosing the necessary tools or ordering a sweeping service.
While the most accessible listening devices can be detected by the mentioned equipment, there are a
lot of devices which can only be found by physical methods: wired microphones, fiber optic
microphones, passive resonators, inactive remote controlled “dormant” devices, or other non-
detectable devices. Therefore a physical search is a very important part of countersurveillance work.
CONTROLS
FRONT PANEL
Figure 1
1.
Power switch
2.
Level indicator - Channel 1
3.
Level indicator - Channel 2/ Level indicator - LOOPBACK input
4.
Level indicator - Channel 3
5.
Level adjustment - Channel 1
Summary of Contents for DNG-2300
Page 1: ...USER MANUAL DNG 2300...
