This single-width module is the source of the 5MHz permit signal that is integral to the operation of the abort loop.
Normal operation of the module is as follows:
As a diagnostic feature, the 5MHz permit signal may be continuously gated from the 201 module. Under such a condition, LAM will be generated and errors may be reported from page T67.
|Reads module number
Logical OR with Z*S2 and power up clear.
Sets normal conditions for 5MHz output and turns LAM off.
|Continuous mode OFF
For 5MHz output signal normal condition.
LAM is off.
|Continuous mode ON
For 5MHz output signal diagnostic condition.
LAM is asserted.
The 201 module front panel supports the following:
|Asserted when 5MHz output signal is continuously gated on.
|Link Reset LED
Flashes upon receipt of event $48 or external link reset input.
|Link Reset view LEMO
|View of 100uS gate.
74128 driver, 50 Ohm compatible.
|External Link Reset In LEMO
|Positive edge trigger of 100uS gate.
Input is terminated in 100 Ohms.
|Abort Link View LEMO
|View of abort link signal after transmission
around the loop. This is a 5MHz square wave when the loop is made up.
74128 Driver, 50 Ohm compatible.
|Abort Link Return Input
|Abort Link 5Mhz Signal Output