Radio Modules; Frequency Bands; Transmit Power - Teledesign TS4000C User Manual

Radio Modules

Frequency Bands

Transmit Power

TS4000 Radio Modem User's Manual
Integrated AirNet Packet Data Protocol
Allows user directed transmissions to only selected destinations.
Provides addressed communications for devices that are not directly
addressable themselves.
Can be optimized for point to point, point to multi-point, and full mesh
networks.
Supports group and all-call broadcast transmissions.
Built in CSMA/CA algorithm minimizes transmission collisions to maximize
channel efficiency and utilization.
Individual TS4000s can be configured as store-and-forward data repeaters to
extend radio network coverage.
PC Configurable
Windows based configuration software provides quick setup and testing.
Flash memory program storage allows for easy in field firmware upgrades.
Rugged and Reliable
Optional watertight housing and connections designed to withstand abuse
from field and marine use.
External interfaces protected against voltage transients, reverse polarity,
electrical shorts and high VSWR.
Two year no nonsense warranty.
Free technical support provided during all phases of installation and use.
The TS4000 consists internally of two modules; a modem module and a radio
module. The radio module has a number of options depending on the frequency
of operation, transmit power, and channel spacing. It is important that the
TS4000 is ordered with the correct radio module based on the operating
requirements.
The radio module of the TS4000 comes in various frequency bands including
VHF, UHF and 900 MHz. Within each of these bands, there are sub-bands that
define the specific frequency range over which a particular radio module will
operate (i.e. 450 to 470 MHz).
For some of the frequency bands, there several options for the radio module
transmit power. The most common transmit power levels available are 2 watts
and 5 watts. The transmit power can be reduced from the maximum power with
the transmit power level setting control (See Radio Setup).
Transmit Duty Cycle
The transmit power of the radio module effects the maximum transmit duty cycle
that the TS4000 can be operated with. Transmit duty cycle is the percentage of
time that the modem is transmitting (i.e. 50 %). If the TS4000 is operated with
too high a transmit duty cycle, then the radio module may get too hot which can
result in damage. The maximum safe transmit duty can be increased by either
reducing the maximum environmental temperature, adding a heat sink to the
back plate of the TS4000, or reducing the transmit power output with the power
level configuration control.
Power Amplifiers
If more transmit power is desired than the internal TS4000 radio module can
provide then an external power amplifier can be used to boost the power. For
connection to the TS4000 it is important that the power amplifier have automatic
power sensing to switch between receive and transmit modes. It is also
important that the power amplifier has fast power switching so that the TS4000
TS4000 Overview 2