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3. For optimal performance, make sure the antenna is installed at an elevation that will provide sufficient clearance to allow your
antenna to radiate without interference.
4. It is recommended to mount the antenna where the path of the antenna cable is straight and as close as possible to the system
transmitter. Do not coil up 100 feet of coaxial cable when only 20 feet of cable is required. Use a RG-8U coax cable that is
specified as Low Loss to minimize power loss.
5. The antenna may be mounted vertically upward, NEVER horizontally.
6. Install the grounding kit provided with the VS654 antenna kit.
Note: The antenna should be located as far from the VS4500 and transmitter as the coax cable allows.
2.5 VS4500 Encoder and External Transmitter Installation
The VS4500 system encoder can be installed on a wall or shelf. Install a UPS power backup to protect the system from power
outages and surges. If you are using an external transmitter, place it next to the VS4500 and use the data cable provided to
connect VS4500 and the external transmitter.
Once the transmitter and antenna are placed properly, connect them to the VS4500 and the transmitter as follows:
1. If an external transmitter is used, connect the antenna to the RF-OUT terminal at the back of the external transmitter. Connect
the transmitter data cable between the VS101-XX transmitter and the DATA I/O port at the back of the VS4500.
Otherwise, connect the antenna to the RF-OUT terminal at the back of the VS4500.
2. If the optional GPS receiver is used, the internal clock of the VS4500 will be set to the UTC time and the VS4500 will
start transmitting the local time every minute.
3. If the PC time is used, connect the PC serial port to the COM1 terminal and run the TimeSync or VPS software. See
Setting Date and Time from PC section on page 25 or TimeSync section on page 34 for more detailed information.
4. No additional programming is needed for the system to be fully operational. See Advanced System Information
section on page 10 for more detailed information about the VS4500.
Note: Do not place the VS4500 on top of the external transmitter as RF feedback may cause system malfunction.
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