1.
Line Switch.
This switch turns the test set on and off. When
the side of the switch labeled 0 is depressed, the test set is
off; I is on.
6. al LED.
only) This LED indicates that the
HP
is internally switched to the 1 or S21 mode and
source power is switched to Port 1.
2. Line LED.
This LED goes on and off with the test set line
switch.
7. a2 LED.
(HP
only) This LED indicates that the
is internally switched to the S22 or S12 mode and
source power is switches to Port 2.
3. Active LED.
This LED lights about two seconds after power
is turned on, following the successful conclusion of self-test.
4.
Port 1.
This test port transmits RF energy from the source
to the DUT and receives reflected RF energy from the DUT.
The reflected RF energy is coupled to a sampler within the
instrument.
5.
Bias Fuse.
only) The fuse which limits bias
applied to Port 1 is within this holder (see the instrument
front panel or the replaceable parts list for the value of the
fuse
8. Bias Fuse.
only) The fuse which limits
bias
applied to Port 2 is within this holder (see the instrument
front panel or the replaceable parts list for the value of the
fuse F2).
9.
Port
2. In the
this test port transmits RF energy
from the source to the DUT and receives reflected RF energy
from the DUT.
In the
this port only receives transmitted (from
Port 1) RF energy. The received RF energy is input directly to
a sampler within the instrument.
Figure
3-1.
Front Panel Features
HP
(upper)
and HP 8512A
3-2
Operation
HP
Test Sets