Quantum Composers 9500 Plus Series - Manual (Page 15)

11
Channel Timer Functions
The Channel Timer functions as a non-retriggerable, delayed, one shot pulse
generator. This means that the timer will only generate one delayed pulse for
every start pulse received. Once the channel timer has started counting, additional
start pulses will be ignored until the pulse has been completed (non-retriggerable).
The start pulse for each channel is provided by the internal T
0
pulse generated by
the Internal System Timer. Whether or not a pulse is generated for each T
0
pulse is determined by the Channel Mode Generator. Standard modes include:
• Normal: A pulse is generated for each T
0
pulse.
• Single Shot: One pulse is generated at the first T
0
pulse, after which
output is inhibited.
• Burst: A pulse is generated for each T
0
pulse, 'n' times, after
which output is inhibited.
• Duty Cycle: ‘n’ pulses are generated for each T
0
pulse after which
the output is inhibited for ‘m’ times. The cycle is then
repeated.
Different modes may be selected for each output, allowing a wide variety of
output combinations. Each output may also be independently disabled or gated
(using the external trigger input).
Output Multiplexer
The output of the Channel Timers is routed to a set of multiplexers. This allows
routing of any or all Channel Timers to any or all of the unit outputs. In the normal
mode of operation, the output of the nth Channel Timer is routed to the nth output
connector. As an example, if a double pulse is required on Channel A output,
one can multiplex the Channel A timer with the Channel B timer adjusting each
timer to provide the necessary pulses.
Dependent & Independent Timing Events
The 9500+ allows the user to control the relationship between the Channel
Timers by setting the sync source for each timer. Independent events are all
timed relative to the internal T
0
start pulse. Dependent events may be linked
together by setting the sync source to the controlling event. This allows the
instrument to match the timed events and adjustments can be made in one event
without detuning the timing between it and a dependent event.
Navigating the 9500+ Front Panel
Selecting Menus
Parameters are grouped in menus, selectable using the function keys. To select
the output channel parameters press the letter key corresponding to the desired
channel. To select other menus press the FUNCTION key and then the key
corresponding to the desired function.