Proper Ground; Radio Frequency Interference; Test Communicator - Bosch Conettix D6600 Installation And Operation Manual

Conettix D6600/D6100i | Installation and Operation Guide | 14.0 Central Station Tips

14.5 Proper Ground

Connect the receivers to an earth ground, not a
chassis or electrical ground. Measure the resistance
of the receiver ground to another ground. If the meter
reads above 2 Ω, check your receiver ground against
a third ground. If the difference is still greater than 2
Ω, ground your receiver to a different earth ground.
Cold water pipes or a grounding rod usually make a
good earth ground. The grounding wire should be
heavy copper with as short and straight a run as
possible. Avoid sharp bends in the ground wire
because a large power surge might arc across the
bend.
The terminator cards and their connection to the
receiver cabinet provide the ground source for the
receiver's circuit boards. Firmly tighten all the screws
used to secure the terminator cards to the back of the
receiver cabinet.
If the mounting bracket screws are not
tight, the receiver's operation can be
erratic. A short circuit or foreign voltage
induced into the system can cause the
receiver to fail.
Put an anti-static mat in front of the receiver to
prevent electrostatic discharge from the operator to
the equipment.

14.6 Radio Frequency Interference

The D6600/D6100i is microprocessor based. All
microprocessors are susceptible to radio frequency
interference (RFI), especially at the 480 MHz and
950 MHz bandwidths used by walkie-talkies. Do not
operate a walkie-talkie near a receiver.

14.7 Test Communicator

Periodically check your receiver and its telephone
lines by using a digital communicator triggered by an
interval timer. If you have more than one data line,
use a communicator for each line or use a multiple
number communicator.
28 Bosch Security Systems, Inc. | 6/09 | 4998122704-06