Technical data

User’s and Service Guide 25
87050A Option K22 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 9 for information on setting the test set's address.
Measuring Transmission
Refer to Figure 11 for the following discussion. With the 87050A Option K22 test set to
measure forward transmission (S
21
), the analyzer's RF source is being output through
the analyzer's PORT 1, and PORT 2 is set to receive the RF signal.
By using the following commands, you will connect PORT 3 of the test set to the A i/p 2
port, and you will connect PORT 8 of the test set to the B i/p 2 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.
OUTPUT 716;"PARALGPIO;"
OUTPUT 716;"PARAOUT15;"
OUTPUT 716;"PARALGPIO;"
OUTPUT 716;"PARAOUT73;"
If directly controlling the 87050A Option K22, use the following GPIB commands:
OUTPUT 712;"a2p3"
OUTPUT 712;"b2p8"
Measuring Reflection
By leaving the DUT connected as in Figure 11, and setting the network analyzer to
measure S
11
, you can measure reflection or return loss.
Figure 11 Controlling the Test Set
CONTROLLER
NETWORK
ANALYZER
PARALLEL
PORT
PARALLEL
PORT
INPUT
GPIB (HP-IB)
87050A-K22
IN
OUT
DUT