TRIGGER MODES
This instrument has four trigger modes:
Internal Trigger: the instrument controls the trigger frequency, and
generates the clock internally.
External Trigger: the instrument is triggered by an external TTL-level clock
on the back-panel TRIG connector.
Manual Trigger: the instrument is triggered by the front-panel “SINGLE
PULSE” pushbutton.
Hold Trigger: the instrument is set to not trigger at all.
These modes can be selected using the front panel trigger menu, or by using the
appropriate programming commands. (See the “Programming Manual for -B
Instruments” for more details.)
PULSE WIDTH MODES
This instrument has two pulse width modes:
Normal: the instrument controls the output pulse width.
PW
IN
=PW
OUT
: the output pulse width equals the pulse width of the trigger
signal on the “TRIG” connector. The instrument must be in the external
trigger mode.
These modes can be selected using the front panel pulse width menu, or by using the
appropriate programming commands. (See the “Programming Manual for -B
Instruments” for more details.)
GATING MODES
Triggering can be suppressed by a TTL-level signal on the rear-panel GATE connector.
The instrument can be set to stop triggering when this input high or low, using the front-
panel gate menu or the appropriate programming commands. This input can also be
set to act synchronously or asynchronously. When set to asynchronous mode, the
GATE will disable the output immediately. Output pulses may be truncated. When set to
synchronous mode, the output will complete the full pulse width if the output is high,
and then stop triggering. No pulses are truncated in this mode.
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Summary of Contents for 14156
Page 29: ...value This completes the operational check 29...
Page 35: ...WIRING DIAGRAMS WIRING OF AC POWER...
Page 36: ...PCB 158R5 LOW VOLTAGE POWER SUPPLY...
Page 37: ...PCB 170C HIGH VOLTAGE POWER SUPPLY...
Page 39: ...PCB 94H ALARM BOARD...
Page 40: ...PCB 104G KEYPAD DISPLAY BOARD...
Page 41: ...MAIN WIRING POSITIVE UNITS P...
Page 42: ...PERFORMANCE CHECKSHEET 42...