Programming
3
Keysight 53147A/148A/149A Operating and Programming Guide
155
Making an RS-232 Cable
Most computers use male DB25 connectors for their serial ports. Therefore, you
must use either a cable with an RJ12 plug at the instrument end and a female
DB25 connector at the computer end or a double-ended RJ12 cable and an
RJ12-to-DB25F adapter to interface the instrument with a computer. Since
pre-manufactured RJ12/DB25 cables are rare, it is probably most efficient to
obtain the necessary parts, and assemble the cable yourself.
Assembling the DB-25/RJ12 Adapter and the Cable
Use the following procedure to wire the adapter and assemble the cable:
1
Obtain a male DB25 to female RJ12 adapter, such as the Voltrex MAK206F
(manufactured by SPC Technology) or equivalent, and either a 6-conductor
male-to-male RJ12 cable of a suitable length or a similar length of
6-conductor, flat telephone cable and two RJ12 plugs. RJ12 modular plugs
(SPC part number TA30-6) and 6-conductor, flat telephone cable (SPC part
number TXW6151) are also available from SPC Technology (and other
manufacturers).
2
Adapter kits like the Voltrex MAK206F usually include a pre-wired RJ12
modular receptacle, a DB25F connector, and the adapter body, or wiring
shroud. Wire the RJ12 receptacle to the DB25F connector according to the
diagrams in
, and then assemble the adapter according to the
instructions included in the kit.
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