User`s guide

User’s and Service Guide 3-11
Controlling the Test Set and Making Measurements
Making Measurements
Making Measurements
The following examples assume that you are using a parallel port
connection with an 8720D, with the test set's parallel address set to "0".
See “Setting the Test Set Address Switch” on page 2-3 for information
on setting the test set address.
Measuring Transmission
Refer to Figure 3-3 on page 3-12 for the following discussion. With the
8720D set to measure forward transmission (S
21
), the analyzer RF
source is output through the analyzer PORT 1, and PORT 2 is set to
receive the RF signal.
By using the following commands, you will connect PORT 20 of the test
set to the Transmission port, and you will connect PORT 21 of the test
set to the Reflection port. You will thus be measuring forward
transmission through the device under test when measuring S
21
. This
will provide you with gain or insertion loss information.
If directly controlling the 87050A Option K24, use the following GPIB
commands:
OUTPUT 716;"PARALGPIO;"
OUTPUT 716;"PARAOUT19;"
OUTPUT 716;"PARALGPIO;"
OUTPUT 716;"PARAOUT45;"
OUTPUT 712;"tran_20"
OUTPUT 712;"refl_21"