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9500+ Series Programming Features Negative Channel Referencing
Negative channel referencing is used to set a negative delay of one channel in reference to another channel.
This can only be done in reference to the individual channels; i.e. a channel cannot have a negative delay in
reference to the internal clock (To).
Consider the following setup:
This setup will give a 1us pulse 500ns (Ch B) after To and another 1us pulse 1us (Ch A) after TO. Ch B in this setup
could not have a negative channel to Ch A greater than 1μs as it would then also be in negative reference to TO, which
is not possible for the 9500+ pulse generator.
Negative channel referencing is useful for applications where an absolute reference channel is desired. All other channels can be configured in reference to absolute. EXT CLOCK INPUT
The "T" option provides Clock In and Clock Out functionality to allow synchronization of several
instruments to an industry standard 10 MHz signal. The rear panel of the unit has BNC connectors for Clock In
and Clock Out signals.
The "Clock In" BNC connector allows synchronization of the unit's timers to a signal generated externally. When the Clock In is enabled, a 10 MHz pulse must be present on the Clock in BNC for the unit to generate pulses. PULSE INCREMENT
The Pulse Generator System Increment modes are a pair of special modes, which allows the delay and width of each
channel to be incremented at the end of a burst of pulses. Each channel is independent and each may be set with different
initial values and different values for the step size for both the delay and the pulsewidth. There are two incrementing
modes Increment and DC Increment. In the Increment mode each start command or external trigger produces a burst of pulses.
At the end of the burst the appropriate delays and pulsewidths are incremented and the instrument is armed for the next
start command. In the DC Increment (Duty Cycle) mode the output is starting as with the normal duty cycle mode. At the
end of each cycle the delays and pulsewidths are incremented. This continues for the number of cycles defined by the
Cycles parameter. The modes are selected from the system mode menu on the pulse generator. The step sizes are specified
in the channel menus.
CHANNEL MULTIPLEXING
Channel Multiplexing allows the addition of channel's timing characteristics (width & delay) to another, separate
channel. Pulse amplitude is determined by the output channel; i.e. you cannot MUX the amplitudes of multiple channels
only their width and delay features.
Consider the following setup (see picture)
Channel D is the combination of Ch's A, B, & C while not using its own width & delay settings.
However, Channel D is set up for only TTL output. Ch D MUX: -HGFE DCBA- -0000 0111- Picture Legend Ch 1 = Ch A Ch 2 = Ch B Ch 3 = Ch C Ch 4 = Ch D OPTICAL PACKAGES
Optical inputs, outputs and communication interfaces are available.
This is valuable for timing and triggering needs in noisy or high energy environments
avoiding interference with traditional cabling.
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Quantum Composers, Inc. P.O. Box 4248 Bozeman, MT 59772
phone 406-582-0227 fax 406-582-0237 toll free 800-510-6530
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