BNC 577 - Manual (Page 18)

Model 577 Operating Manual 14
7.2.4 Setting the Output Reference
The 577 also has the ability to output a clock signal to an external unit if so desired. The user can choose from
any of the preset frequencies as well as outputting the T
0
signal. If the unit is in external input mode and a
different frequency is input than what the 577 is told to expect, the output would be a factor of the expected
frequency.
Ref: Selects the frequency of the output reference for synchronizing with external system components.
7.2.5 Rearming the System
The 577 has the functionality built in to reset the internal channel timers with the press of a soft key or by sending
a simple command. When the unit is used in a channel single shot mode (i.e. single shot or burst mode) or
externally triggered the desired pulse train will be produced then the unit will remain armed but not producing
pulses. With the ReArm capability the pulses on the single shot channels can be reproduced without disruption of
the continuous channels. This function is also useful when in external trigger mode and channels are in a single
shot mode to produce additional pulses.
7.2.6 Setting the Shot Counter Parameters
The 577 has the ability to count pulses, whether it be from an internal source or indirectly from an external source.
This is a 32 bit counter so the maximum number it can count to is (2
32 ) 4,294,967,296. If the counter is to be used
on an internal source simply choose the source form the soft key (T
0
or CH [A-H]). The counter can also be set up
to count external pulse by either setting the system or channel to triggered mode and single shot modes. The
Counter menu can be accessed by pressing the Ctr soft key while in the System menu page. From the Counter
page the counter source can be selected, the counter can be enabled, disabled, and can be cleared.