Front Panel Operation
2-71
3. Readings are automatically stored in the buffer starting
at memory location (reading #) zero.
4. The Alternating Polarity test will be re-armed upon
completion of a sequence. When the selected trigger
source event occurs, the test will re-run. Readings may
be recalled, or the sequence re-configured while the
6517A awaits the trigger. When the sequence is armed
the first time, trigger source is set to manual but can be
re-configured to any other trigger source. To end the se-
quences, press EXIT to return to normal operation.
2.15 Triggers
The following paragraphs discuss front panel triggering, trigger
configuration and external triggering, including example setups.
Model 6517A triggers are set up from the CONFIGURE
TRIGGER menu. The menu structure is shown and summa-
rized in Table 2-21.
Notice from Table 2-21 that there are two trigger configura-
tion structures; BASIC and ADVANCED. The basic menu
structure can be used when simple trigger operations will
suffice. The advanced menu structure must be used when
more sophisticated trigger operations (such as scanning) are
required. The differences between basic and advanced trig-
gering are explained in the next paragraph.
Table 2-21
CONFIGURE TRIGGER menu structure
Menu item
Description
BASIC
MODE
CONTINUOUS
ONE-SHOT
SOURCE
IMMEDIATE
MANUAL
GPIB
EXT
TIMER
Select and configure basic triggering:
Select trigger mode:
Use for continuous triggering.
Use for one-shot triggering.
Select source of triggers:
Use to make measurements immediately.
Use TRIG key to control measuring.
Use bus triggers to control measuring.
Use external triggers to control measuring.
Use a timer to control measuring. Enter trigger interval (0.001 - 999999.999 sec.).
ADVANCED
MEASURE
SOURCE
IMMEDIATE
EXTERNAL
MANUAL
GPIB
TRIGLINK
TIMER
HOLD
DELAY
COUNT
INFINITE
ENTER-CHAN-COUNT
CONTROL
SOURCE
ACCEPTOR
Select and configure advanced triggering:
Measure layer menu:
Select measure source:
Use to make measurements immediately.
Use external trigger to control measuring.
Use TRIG key to control measuring.
Use bus triggers to control measuring.
Use Trigger Link triggers to control measuring. Enter Trigger Link mode and
lines.
Use a timer to control measuring and enter interval between triggers (0.001 -
999999.999 sec.).
Use to hold up the measurement in the measure layer.
Use to delay measurement in the measure layer (0.001 - 999999.999 sec.).
Define number of measurements to make:
Repeat measuring indefinitely.
Specify count (1 - 99999).
Select trigger control mode:
Enable Source Bypass.
Disable Source Bypass.
