HP 8112A, Operating, Programming And Servicing Manual

Page: 65 / 406

Note
Gate Mode
6. Select each output parameter in turn by pressing its associated
key. Adjust the parameter value using the
and
keys. Refer to Chapter 4 Operating
for additional information on
parameter adjustment .
7. If a Control Function is required, select the required mode by
repeatedly pressing the control mode key until the required mode
is lit . Apply the Control signal to the CTRL INPUT connector.
Refer to Chapter 4
Operating for more permissible combinations of
Operating and Control modes.
You may wish to set up Output Limits as described in Chapter 4
Operating
to protect the device under test .
8. Press the key to turn off output disable mode and enable
the output (LED extinguished) .
EXT
INPUT
TRI G
OUTPUT
MAI N
OUTPUT
I
----- ----------------------- ----------
Figure 5-3. Typical signals in Gate mode
1 . Switch the instrument on using the line switch.
2. If neccessary, select gate mode by repeatedly pressing the standard
mode key until the GATE LED is lit .
3. Apply the external gating signal t o the EXT INPUT and select
trigger slope and level
as
required. Refer to Chapter 4 Operating
for information on the trigger controls. Triggering can also be
simulated using the key.
4. Select the Transition mode by pressing the key with the
appropriate symbol. The parameter window will be automatically
illuminated.
5. Select each output parameter in turn by its associated
key. Adjust the parameter value using the and
keys. Refer to Chapter 4
Operating
for additional information on
parameter adjustment.
Operating Examples 5-3