Teledesign Systems Inc TS4000EH Manuel D’Utilisation

Selection Description 
Idle Time Between Bursts 

This sets the minimum amount of time (in character 
periods) that the receive data (RXD) line will be idle 
(inactive) between received bursts of data.  If this 
value is set to zero, the receive data line may 
remain active continuously when multiple bursts of 
receive data are transferred to the host.   

If the DCD line option is set for the Active when 
Sending Receive Data to the User then the DCD 
line will also be inactive during the receive data line 
idle times. 

DTR Enabled for Receive 
Data Flow Control 

When enabled, DTR acts as flow control for receive 
data coming from the TS4000 to the host.  When 
DTR is inactive, data received by the TS4000 is 
stored in an internal buffer and inhibited from being 
sent to the host equipment.  The flow of receive 
data out of the serial port resumes when DTR is 
activated. 

Provide RSSI at Receiver 

When this control is activated, the RSSI (Receive 
Signal Strength Indication) of the received packet is 
sent as a prefix string to the data. 

The string is made up of ASCII characters as 
follows: 

+TSRxxx 

where xxx = receive signal level in –dBms  

    (i.e. +TSR087 = a –87dBm signal level) 

Note that because the value is in –dBms (negative 
dBms) a larger receive signal is represented with a 
smaller 3 digit number. 

 
Selection Description 
Active when Sending 
Receive Data to the User 

DCD is active when receive data is sent out of the 
TS4000 via the serial port. 

Active when Receiving 

DCD is active when the TS4000 detects a signal on 
the radio channel.  This mode can be used to 
remote the receive light. 

Both 

DCD is active when either receive data is being 
sent out the serial port or when a signal is detected 
on the radio channel.  Note that for most conditions 
and configurations these states overlap.