Teledyne LeCroy PeRT3 Phoenix System - Manual (Page 67)

Teledyne LeCroy PeRT
3
Phoenix System User Manual 65
System Control Ribbon ‐‐ Options Tab Teledyne LeCroy
The External OOB Board is automatically detected if it is present at start‐up. If it is
automatically detected, the box will be checked but the control will be disabled (i.e. you
won't be able to uncheck the box). You must power down the hardware when connecting
or disconnecting the External OOB Board. After powering the hardware back up you will
need to reconnect the application to the hardware and the External board setting should
be automatically set.
If no board is detected (either because none is present or because in some older systems
the hardware doesn't support automatic detection) then the Ext OOB Board box will not
be checked, but the user will be allowed to check or uncheck it to indicate the presence or
absence of the board. If the board is connected it is vital that this box be checked,
otherwise signal amplitude and OOB signaling will not function properly.
The Clock allows the user to provide an internal or external clock for the system and
specify the nominal frequency of this clock signal, which is supplied via the Reference
Clock In connector on the back panel of the system.
Rx DFE
The Rx DFE panel is used to apply a 3 tap DFE filter to the signal received at the Error
Detector. Typically, it is required that a DUT is able to transmit a compliant Transmit signal
to ensure that an open eye is received at the BERT error detector. In the case where the
signal passes through a long channel which causes the eye to close, the DFE filter may
help to open the eye.
Note: The built‐in DFE features have limitations which are described in the PeRT
3
Phoenix datasheet.
Figure 6.26: Rx DFE Panel