Operation; Initialization At Power-Up; Selecting A Test Set - HP 8511A Operating And Service Manual

Initialization at
Power-up

Selecting a Test Set

Operation

Upon power-up, the IF switches must be configured so that only one system
test set is active. The following procedure shows how to make one test set
active.
1. Check the active lights of all system test sets.
2. Check the HP 8510's expected test set address by pressing
. This should match the address of the desired test set. If not, change
SET]
the address.
3. If unselected test sets are active, (active light ON), deactivate the test set
by temporarily addressing it. Then return to the desired address.
Test Set IF Switching. The active test set is selected by the built-in
capability of the HP 8510 to generate an addressed command to the test set.
Each time the HP 8510 ADDRESS of TEST SET function is changed (see
HP 8510 LOCAL Menu), the HP 8510 switches the previously addressed
test set IF to external and the newly addressed test set IF to internal. The test
set front panel ACTIVE indicator shows the test set status. When the test set
is active the IF signals from the test set are applied directly to J11 TEST SET
INTERCONNECT. When the test set is inactive the IF signals appearing at
J10 are passed through to J11and on to the next test set or the HP 8510.
The address of the test set can be changed manually from the HP 8510 front
panel by selecting the ADDRESS of TEST SET function then entering the
address of the test set and pressing
control using the HP 8510 GPIB ADDRESS; command. The GPIB address
of a particular test set is set by address switches on the test set rear panel.
RF Switch Driver Commands. A related feature of the HP 8510 is that
when the HP 8510 ADDRESS of TEST SET function is changed, a code
sequence is automatically issued over the HP 8510 system bus to the device
at the ADDRESS of RF SWITCH. In the recommended configuration, this
device is an HP 11713A attenuator/switch driver which in turn controls one
or more HP 33311C coaxial switch. As shown in Figure 4-5 on page 4-7 and
Figure 4-6 on page 4-10, these switches are used to select which of the test
sets receive the RF Output of the network analyzer source. The exact
command issued depends upon the new value of the ADDRESS of TEST
SET function, also shown in Figure 4-5 on page 4-7 and Figure 4-6 on
page 4-10.
or it can be changed under program
[XI],
HP 8511A Test Set Operating and Service Manual 4-9
Operation
Operation
[LOCAL] [TEST