Channels

Timing systems typically include multiple channels of timing synchronized to a common clock. In a conventional benchtop Pulse Generator (8 Channel Version shown below), each channel is represented by a different output connector. Other architecture like VXI, NIM, OEM cards or 19" Rack Mounts also typically leverage one output connector per channel.

Channels are often independently selectable (on/off, output voltage, pulse mode, etc). Output modes include

Normal: One Output Pulse / Trigger

Single Shot: One Output Pulse on First Trigger Only, then Channel is Inhibited

Burst: A Preset Number of Pulses in Burst following a single Trigger, then Channel is Inhibited.

Duty Cycle (Divide by N): A preset ratio of pulse:no pulse

Other Special Features in more advanced timing systems are available, such as:

WAIT: Wait X number of pulses before uninhibited output

Multiplex: Combine Outputs of Multiple Channels on one Output Connector (shown below)

OEM Pulse Generator Module shown below

Some modern systems allow for system modes and channel modes concurrently, with system modes providing overall timing parameters that take precedent over individual channel modes. Below is an example of a system mode limitation on all channels. First take a look at normal system operation (triggers):

Now notice the change on ALL OUTPUTs when the system parameter is set:

We see that the burst pulse limits the triggers to all other modes.