Teledesign Systems Inc TS4000EH Manuel D’Utilisation
TS4000 Radio Modem User’s Manual
GPS Configuration
65
This indicates the number of data bits in each asynchronous character.
This indicates the parity of the asynchronous characters.
Selection Description
Channel
Spacing
This indicates the parity of the asynchronous characters.
Selection Description
Channel
Spacing
This setting should be configured to match the maximum
channel spacing allowed by the user’s license. This value
controls the amount of frequency bandwidth (occupied
bandwidth) that the transmitted signal will use. A higher
value corresponds to more bandwidth and therefore provides
better BER (Bit Error Rate) performance and a higher
maximum over the air data rate.
channel spacing allowed by the user’s license. This value
controls the amount of frequency bandwidth (occupied
bandwidth) that the transmitted signal will use. A higher
value corresponds to more bandwidth and therefore provides
better BER (Bit Error Rate) performance and a higher
maximum over the air data rate.
For operation in FCC jurisdictions, the channel spacing
is fixed (not user configurable) at 12.5KHz.
is fixed (not user configurable) at 12.5KHz.
Air Rate
The over the air modulation bit rate.
Selection Description
Fixed Channel
The channel activated at power up is the channel set in the
corresponding control.
corresponding control.
Clear Channel
Scan
Scan
Activates Clear Channel Scan Operation.
The bottom box is the scan list which indicates the channels
that will be scanned. The scan list can be changed with the
channel box, add button and delete button.
that will be scanned. The scan list can be changed with the
channel box, add button and delete button.
When Clear channel operation is enabled, the TS4000 will
automatically and dynamically select the least congested
channel from the clear channel scan list. This operation is
completely transparent to the host equipment and does not
require any operator intervention.
When clear channel scan is enabled, all of the TS4000s (both
transmitters and receivers) are constantly scans the channels
of the scan list looking for valid TS4000 transmissions and
also looking for interference (noise or transmissions from
other sources). The TS4000s keeps track of the amount of
interference on each channel. Before transmitting, a TS4000
will select the best channel and switch to the channel with the
least amount of interference. The receiving TS4000s will
then see this valid TS4000 transmission during their scans
and receive the packet.
To insure that receiving TS4000s have time to detect and
lock up to all transmissions, the transmit preamble time is
increased based on the number of channels on the scan list.
automatically and dynamically select the least congested
channel from the clear channel scan list. This operation is
completely transparent to the host equipment and does not
require any operator intervention.
When clear channel scan is enabled, all of the TS4000s (both
transmitters and receivers) are constantly scans the channels
of the scan list looking for valid TS4000 transmissions and
also looking for interference (noise or transmissions from
other sources). The TS4000s keeps track of the amount of
interference on each channel. Before transmitting, a TS4000
will select the best channel and switch to the channel with the
least amount of interference. The receiving TS4000s will
then see this valid TS4000 transmission during their scans
and receive the packet.
To insure that receiving TS4000s have time to detect and
lock up to all transmissions, the transmit preamble time is
increased based on the number of channels on the scan list.
This sets the transmit power level. The maximum transmit power that can be set
depends on the specific radio module in the TS4000. Therefore the maximum
value that can be set is listed only when the configuration program is connected
to the TS4000.
Data Bits
Parity
Radio Operation
Frequency Channel at
Power Up
Transmit Power