Tektronix 8001A Installation Manual page 29

System Processor Module
3-4
When large blocks of data are transferred to a device with limited buffer space, the
RS-232-C control signals must be used to cause a data transmission delay. The delay allows
the buffer to be emptied.
r
Mnemonic Signal Name
GND Protective Ground
TDATA Transmitted Data
RDATA Received Data
RTS
Request To Send
CTS Clear To Send
DSR Data Set Ready
SGND Signal Ground
Table 3-1
RS-232 Control Signals
Use
Chassis
Data flow from terminal
to modem
Data flow from modem
to terminal
Control signal from
terminal asking for
permission to send data
Control signal sent to
terminal indicating
transmission can begin
Control signal sent to
terminal indicating data
equipment is operational
Ground line for all
signals
@
Ckt. Pin No.
Assignments
AA
1
BA 2
BB 3
CA
4
CB
5
cc
6
AB
7
8001/8002 Installation Guide