User`s guide

Chapter 2 2-13

Operation

Example: Uncouple Channel 1 and Channel 2

In this example, the analyzer’s channels are uncoupled and the selected

port conﬁgurations are set independently. The display is set so both

channel 1 and channel 2 are shown.

In the following commands, “Nwa” is the address of the network

analyzer:

For more information on externally calibrating and controlling the

analyzer, refer to the standard documentation.

NOTE The Option H39 is a three-port test set. The current capability of the

standard analyzer allows only the full 2-port calibration technique to be

used. GPIB commands for calibrating the analyzer remain the same as

those used to calibrate a standard instrument. When using GPIB

commands, it is very important to remember which ports are selected

and the states (forward or reverse) that are selected.

OUTPUT Nwa; “PRES” !set network analyzer to default state

OUTPUT Nwa;”COUPOFF” !uncouples channels

OUTPUT Nwa; “H39MODEON” !turn 3port mode on for H39

OUTPUT Nwa;”SELEPORT13” !select PORT 1 and PORT 3

OUTPUT Nwa;”Chan

1”,”S21:”

!set channel 1 to measure FWD S

for PORT 1 and PORT 3

OUTPUT Nwa;”Chan 2” !select channel 2

OUTPUT Nwa;”SELEPORT 23” !select PORT 2 and PORT 3

OUTPUT Nwa;”S12” !set channel 2 to measure REV S

for PORT 2 and PORT 3

OUTPUT Nwa;”DUACON” !dual channel display on