Teledesign Systems Inc TS4000D User Manual

Attack time is the amount of time necessary to establish the radio channel.  This
includes the power up time for the transmitter and the time for the receiver to
sense and demodulate the transmit signal.  The TS4000 is preset for the
appropriate attack time of the installed radio module.  Therefore, this control
should normally be set to zero.

Disabled

This minimizes the amount of overhead required to send data.

Enabled

Transmit data is block coded (12,8 Hamming) and interleaved
(16 bits).  This provides error correction for strings of errors
up to 16 bits long.  Coding requires an extra 50 % overhead
on top of formatted data.  This type of coding is ideal for
combating errors induced from multi-path fading common in
mobile environments.

The scramble code determines the pseudo-random sequence used to scramble
the transmitted data.  This provides data privacy and also randomizes the data for
optimum signal detection.  All TS4000s operating in the same network must use
the same scrambling code.

The TS4000 comes in various frequency bands (i.e. 450 to 470 MHz) and can be
programmed for any valid channel within a given frequency band.  The TS4000
can be set for up to 99 frequency pairs.  A frequency pair is a receive frequency
and a transmit frequency which can be set to the same or different frequencies.

Frequency channels are programmed into the TS4000 using the configuration
program.  To access the frequency program screen press the Frequency
Configuration button on the main screen of the configuration program.  Frequency
channel configuration settings are programmed into and retrieved from the
TS4000 the same as the modem configuration settings.

The FCC rules state that only authorized service/maintenance personnel should
be allowed to change the frequencies programmed into radio devices.  Because
of this, a software enable code is required to enable the frequency programming
capability of the TS4000 configuration program.  Note that this enable code is not
required to retrieve and display the channel frequencies programmed in the
TS4000.

Please contact Teledesign Systems for information on finding the nearest
authorized service center.