NOTE: If Wid + Dly + 75ns (hardware reset time) > T
o
Period, the correct
pulsewidth will be generated but at a slower rate.
Setting Pulse Output Parameters
There are two basic types of outputs available on the 9530: (a) TTL/CMOS
compatible outputs; (b) adjustable amplitude outputs.
Out:
Selects between TTL/CMOS mode and Adjustable
mode when both are available on a single output.
Pol:
Sets the voltage polarity of the pulse, active high or ac-
tive low. Note: All outputs are positive - negative volt-
ages are not supported.
Ampl:
In adjustable mode, the unloaded output voltage is set.
The actual output voltage will depend on the load im-
pedance. For example: If the load is 50 ohms, the out-
put will be 50% of the stated voltage.
Using the Output Multiplexer
Each output channel includes a multiplexer which allows routing any or all of the
timer outputs to the physical output. This allows double pulses and other com-
plex pulse trains to be generated.
Mux: -00000101-
The multiplexer is represented by a n bit binary number as shown above. n is
the number of channels. Each bit represents a channel timer, which is enabled
by setting the bit to one. In the above example, timers A and C are combined on
the current output.
Setting System Internal Rate Parameters
The internal T
o
period controls the fundamental output frequency of the system.
Each channel may operate at submultiples of the fundamental frequency using
their duty cycle mode.
Source:
Sets the reference source for the internal T
o
Period.
Per:
Sets the internal T
o
Period.
To set the system Internal Rate - Menu key and then use the arrow keys to
specify the T
o
Period.
