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Teledyne API T703/T703U Calibrator Operation Manual Communications
101
Figure 5-2: CPU COM1 & COM2 Connector Pin-Outs for RS-232 Mode
Teledyne API offers two mating cables, one of which should be applicable for your use.
Part number WR000077, a DB-9 female to DB-9 female cable, 6 feet long. Allows
connection of the serial ports of most personal computers. Also available as Option
60 (see Section 1.2).
Part numbe
r WR000024, a DB-9 female to DB-25 male cable. Allows connection to
the most common styles of modems (e.g. Hayes-compatible) and code activated
switches.
Both cables are configured with straight-through wiring and should require no additional
adapters.
NOTE
Cables that appear to be compatible because of matching connectors may incorporate internal wiring
that makes the link inoperable. Check cables acquired from sources other than Teledyne API for pin
assignments before using.
To assist in properly connecting the serial ports to either a computer or a modem, there
are activity indicators just above the RS-232 port. Once a cable is connected between
the calibrator and a computer or modem, both the red and green LEDs should be on.
If the lights are not lit, use the slide switch on the rear panel to switch between DTE and
DCE modes
If both LEDs are still not illuminated, make sure the cable properly constructed.
07223C DCN6572