Technical data

12 User’s and Service Guide
87050A Option K22 Commands
Commands
As mentioned earlier, the test set can be controlled in three ways. The first two involve the
use of a separate controller. The third way uses the network analyzer manually. These
methods of control are detailed below and on the following page.
Computer Control
The first way to control the test set is to write GPIB commands to the network analyzer
which then writes to the test set via the parallel port. See Figure 7 on page 13 for a
diagram of connections for this type of control. The second way is to write GPIB commands
directly to the test set's GPIB port. Both of the following examples use the variable “D”
which is defined in Table 2 on page 15.
To use a parallel port connection with the 8720D, use an GPIB command to write bits on
the parallel port. The following example assumes that the address of the network analyzer
is 16.
OUTPUT 716;"PARALGPIO;"Sets the parallel port for GP-IO function
OUTPUT 716;"PARAOUT[D];"Programs all GP-IO output bits (0 to 256) at once
To address the 87050A Option K22 test set directly over GPIB, use a controller to write
directly to the test set's GPIB port. The following example assumes that the address of the
test set is 12.
OUTPUT 712;"STRING$"
NOTE Commands are case sensitive.