Tektronix 1740A Series, User Manual

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Installation
1740A/1750A/1760 – Series Service Manual
2–13
RS232 Connector
The serial interface is 9-pin subminiature D-type connector that provides a serial
interface for remote control. It has a driver built in for RS232 serial binary data
interchange. The operational mode is full duplex. Data rate = 9600 baud; data
type is asynchronous. Figure 2–11 shows both the pin assignments and the
connector orientation.
DATA
CONNECTION PIN
NUMBER
1 DCD
2 RXD (RECEIVED DATA)
3 TXD (TRANSMITTED DATA)
4 DTR (DTE READY)
5 SIGNAL GROUND
6 DCR (DCE READY)
7 RTS (REQUEST TO SEND)
8 CTS (CLEAR TO SEND)
9 NOT CONNECTED
1 5
6 9
RS232
Figure 2–11: Rear panel RS232 connector
Installing Software
The versatility of these monitors allows them to be upgraded to perform
additional measurements or to revise operations. Software code is contained in
Flash EPROM that can be written over when upgrades become available.
In addition, if the Flash EPROM is replaced, it becomes essential to reinstall the
software from the software floppy disk accompanying this manual.
If an upgrade is anticipated, it is essential to know the version of software
resident in the instrument. The current version of software can be found by
entering the CONFIG menu and going to the REMOTE submenu. The version
number, preceded by the letter V, is displayed in the lower right corner of the
screen.
The software disk is a 3.5” (1.44MB) high-density disk. It contains all programs
necessary to upgrade or reload the operating software in the Tektronix
1740A/1750A/1760–Series instruments to software version 2.2 or greater. If a
disk drive other than 3.5” is to be used, have the contents of the disk copied to
the desired size disk or to a hard disk directory. The disk contents are:
H
NVSAVE.EXE
Saves calibration constants and user presets.
H
CONVERT.EXE
Updates format of calibration and preset data.
Software Disk
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