NB7L14MMNEVB
http://onsemi.com
3
Setup (continued)
Step 3: Setup Input Signals
3a: Set the signal generator amplitude to 400 mV.
NOTE: The signal generator amplitude can vary from
75 mV to 900 mV to produce a 400 mV DUT
output
.
3b: Set the signal generator offset to
−
200 mV (the center of
a nominal NCML output).
NOTE: The V
CMR
(Voltage Common Mode Range)
allows the signal generator offset to vary as long
as V
TH
is within the V
CMR
range. Refer to the
device data sheet for further information.
3c: Set the generator output for a PRBS data signal, or for a
square wave clock signal with a 50% duty cycle.
Step 4: Connect Output Signals
4a: Connect the outputs of the device (Q0, Q1,
…
) to the
oscilloscope. The oscilloscope sampling head must have
internal 50
W
termination to ground.
NOTE: Where a single output is being used, the
unconnected output for the pair
must be
terminated to V
CC
= GND through a 50
W
resistor for best operation. Unused pairs may be
left unconnected. Since V
CC
= GND, a standard
50
W
SMA termination is recommended.
