Tektronix VM700T, User Manual

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Installation
VM700T Option 01 (NTSC) & Option 11 (PAL) User Manual
1- 13
Pin 9 - RI (Unused).
Table 1--2 gives cable configurations that should work in most instances. The pin
numbers given for the Terminal (DTE) are the most common locations for the
corresponding signals on DB-9 and DB-25 connectors. Note that there is
considerable deviation from this “common” configuration, and not all devices
use control lines in the manner described under this topic. Refer to the instruc-
tion manual of the equipment you are connecting to the VM700T to determine
exactly how it should be connected.
Note also that both ends of the DTE to DTE cable are typically female connec-
tors. The DTE to DCE cable is female on the VM700T (DTE) end, and typically
male on the modem (DCE) end.
Table 1- 2: Typical VM700T RS-232C cable connections
VM700T (DTE) to terminal (DTE) (null modem) VM700T (DTE) to modem (DCE)
VM700T pin no.
(DB-9) Terminal pin no.
(DB-9) Terminal pin no.
(DB-25) VM700T pin no.
(DB-9) Modem pin no.
(DB-9) Modem pin no.
(DB-25)
1 (DCD) 1 6 (DSR), 8 (DCD)
2 (RD) 3 (TD) 2 (TD) 2 (RD) 2 3 (RD)
3 (TD) 2 (RD) 3 (RD) 3 (TD) 3 2 (TD)
4 (DTR) 1 (DCD) 8 (DCD), 6 (DSR) 4 (DTR) 4 20 (DTR)
5 (Chassis GND) 5 (Chassis GND) 7 (SG) 5 (Chassis GND) 5 7 (SG)
7 (RTS) 8 (CTS) 5 (CTS) 7 (RTS) 7 4 (RTS)
8 (CTS) 7 (RTS ) 4 (RTS ) 8 (CTS) 8 5 (CTS)
Table 1--3 shows the minimum pin configuration for a cable connecting the 9-pin
male connector of the VM700T to a 25-pin connector on a PC or terminal. Refer
to the
VM700T RS-232 Interface Programmer Manual
for more information on
connecting the VM700T for remote operation.
Table 1- 3: VM700T 9-pin to PC 25-pin null modem cable for remote control
VM700T cable end (9-pin female) PC cable end (25-pin female)
2 (RD) 2 -- Transmit Data (TD)
3 (TD) 3 -- Receive Data (RD)
5 (SG) 7 -- Signal Ground (SG)
7 (RTS) 5 -- Clear to Send (CTS)
8 (CTS) 4 -- Request to Send (RTS)
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