User's Manual
Using the Transmitter
DSS-900-KT Digital Spread Spectrum Surveillance System 13
Using the Transmitter
Keep in mind that the TX patch antenna must be facing away from the
agent’s body to work properly. The patch antenna is housed in the black
plastic-like dome on the TX unit. There is no external antenna on this unit.
• The internal top fire mike is located between the two slide switches
(Figure4-b). It is active unless an external mike is plugged into the gold
Lemo connector as shown in Figure4-a. Two microphones are supplied
with the DSS-900-KT; they differ only in color and cable length.
Figure 4a. TX with External Microphone b. TX Panel
1. Start the surveillance session with fresh TX batteries. Slide the battery
holder cover open to insert batteries (Figure3 on page 5).
2. The TX unit is labelled with its frequency. Use the label on the inside
of the DSS-900-KT case cover (see Figure2 on page 4) to determine
the channel number corresponding to the TX frequency.
3. Set CHANNEL SELECT on the RECEIVER to the same number.
4. Turn the TX ON using the slide switch at the top of the unit.
5. Set the AGC ON. This provides optimum audio at the RX. Set the AGC
OFF if a loud, interfering noise, such as a jukebox, is near the agent.
TIP Remind the agent wearing the wire to face toward the
RX whenever possible during the mission to produce
the strongest signal at the RX.
a
l
Antenna
Power AGC
On Off On Off
Internal External
b
MicrophoneMicrophone
Internal
Microphone
External
Microphone
External
Microphone
a
Internal
Microphone
Antenna