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SC3100
Pre-Installation Requirements
SC3100 Operation and Installation Guide
© 2004 Bosch Security Systems Page 17 90026-201D
IMPORTANT
All sales personnel must be required to utilize the IT1500 Tester with a minimum of 9dB attenuator
installed between the IT1500 Tester and the Tester Antenna to determine if two-way radio
communication between the prospective customer site and the Central Station SC9000 computer
is possible before the job is sold.
After the initial testing is performed by the salesperson, the installer must be required to utilize the IT1500 Tester,
with a minimum of 9dB attenuator installed between the IT1500 Tester and the Tester Antenna, to determine the
proper antenna location within the customer site for installation.
The IT1500 is a portable tester which transmits a radio signal from the remote customer site to the Central
Station SC9000 computer and receives an acknowledge (ACK) message to verify a successful two-way
communications link for that particular geographic location and antenna position.
REMEMBER! Moving the antenna location as little as 4 in. (10.2 cm) in either direction can mean the difference
between a trouble-free site, or an angry customer who requires multiple service calls.
3.7 SC3100 Acceptable Antenna Types
The SC3100 is usually installed using the factory supplied omnidirectional (OMNI) antenna. However, if testing
using the IT1500 Tester, with a minimum of 9dB external attenuator installed between the Tester and the Tester
antenna, shows that the factory supplied omnidirectional antenna is not sufficient, the installer may choose to
use a direction, gain antenna. This type of antenna is usually referred to as a beam or Yagi type antenna. The
following is a partial listing of acceptable types of antennas for installation on or external to the SC3100 Radio
Communicator. Both the omnidirectional and Yagi type antennas are available to order directly from Bosch
Security Systems. Call (800) 289-0096 for more information.
Bosch Security Systems factory supplied SAFECOM omni-directional antenna:
Bosch Security
Systems Part Number
Description Frequency Range
SC921-xx ½ wave, 2.5 dB gain, RUBBER DUCK 400-512 MHz
C740A 3.0 dB gain, Omni Whip 450-470 MHz
C742 10.0 dB gain, Directional (Yagi) 450-470 Mhz
Table 1: SC3100 Antenna Types