Specifications

RTS Operation G-2
be specified using the standard data format ‘+#####.##’. Use the write
protected commands T1, T2 and T3 to specify the delay time values.
The RTS output function is activated using the RTS+ or RTS- commands.
The + and - polarity characters determine the active polarity of the RTS
signal while data is being transmitted. The signal polarity can be either active
high (typically +Vs) or low (zero volts). Use the RTS+ command to specify
an active high output or the RTS- command to specify an active low output.
Once the RTS+ or RTS- command is received, the module will store the
polarity information in internal EEPROM and the RTS output function will be
enabled. The RTS output function will remain enabled until an RTSD
command is received by the module.
Figure G-1. Timing Diagram.
In addition to the RTS signal three user programmable time delays are
provided in the RTS series. As shown in Figure G-1, when the RTS module
receives a command it begins the first delay time, T1. After T1 is completed,
the module activates the RTS signal to key the radio transmitter. After the
RTS signal is activated, delay time T2 started to allow the transmitter
adequate time to turn-on. After T2 is completed the module outputs the
buffered response data to the RS-232 Transmit line. When the data
transmission is complete, the module starts delay time T3. After time T3, the
module’s RTS signal turns off and is now ready for the next command.