User Manual

I.SITE III User Manual
© SWISSPHONE Wireless AG Version 1.1 Page 9/20
3.4.2 Transmission Unit
The Tait TM8105 transmission module is approved for ETSI 300113, which makes it suitable for
local radio broadcasting. The transmitter is designed for digital data transmission. The modulation
method employed for this is DFSK (Direct Frequency Shift Keying).
The following four transmission units are available.
G
e
neral:
In order to avoid damaging the transmitter, ensure the following:
• The prescribed power rating of 90-240VAC, 50-60Hz must never be exceeded.
• The high frequency output must be connected at 50Ω.
• Proper earthing and protection against lightning surges must be provided.
If an antenna is being used, we recommend to mount it several meters removed from the
transmitter to avoid feedback.
Note:
You can configure the output strength of the transmission module to suit your requirements.
Excess Temperature Protection:
When the operating mode is ‘Continuous Transmission’ and the environmental temperature is
above 55°C, the transmitter automatically reduces its output strength to a safe operating level.
3.4.3 Controller Board
The controller board handles communication via the Ethernet LAN interface, acting as a server for
external clients and accepting transmission requests. These requests trigger POCSAG
transmission via the transmission unit. Additionally, status and fault signals coming from the
transmission unit and the power supply are compiled and displayed on the controller board, as well
as being reported back via the Ethernet LAN interface.
The board is powered using a 3.3.VDC voltage regulator.
In order to provide more informative transmitter monitoring, every transmission is accompanied by
a range of status messages:
Status Information
SI01-3 (optional) Input I1 edge-triggered, potential-free 5-15V, debounced (open/closed)
SI04 (optional) Service contact (door contact, open/closed)
SI05 Operating temperature in degrees Celsius, decimal two-digit
SI06 Fault status (when fault messages present)
Fault Status Messages
FS01 Unstable transmission frequency (PLL Unlocked)
FS02
Fault in transmission unit TX (High FWD/Low REV Power or TX Excess
Temperature)
FS03 No operating voltage present (AC Power Fail)
FS04 (optional) Operating voltage of backup battery below threshold value (ACCU Low)
FS05 Incorrect transmitter keying (TX Not Allowed)
Frequency Frequency
Transmission
strength
Channel spacing Standard
VHF 4m 66-88MHz 1 to 25W 12.5/20/25kHz ETSI 300113
VHF 2m 136-174MHz 1 to 25W 12.5/20/25kHz ETSI 300113
UHF 400-470 MHz 1 to 25W 12.5/20/25kHz ETSI 300113
UHF 450-530 MHz 1 to 25W 12.5/20/25kHz ETSI 300113