Specifications

11-4
Performance Tests
Introduction
1. Switch on the equipment and allow the HP 71612 system to go through self test
(approximately 20 seconds).
2. Perform the key sequence :
Trigger set to CLK/8
set to 10 GHz at 2 Vpp. amplitude.
set to 2 V amplitude with 0V Hi-level.
This will set the Pattern Generator to output a 2^23−1 PRBS pattern at 10 Gb/s with Data
amplitude 2 Vpp and a Hi-level of 0V.
*Set the scope as follows:
AUTOSCALE
Timebase 20 ps/div
Set PROBE ATTEN to 10 (if the 20 dB pad is fitted in the trigger path)
Vertical sensitivity to 500 mV/div
Display set to PERSISTANCE mode (AVERAGE mode displays a flat line)
NOTE Scope Trigger should be adjusted for lowest jitter on rising and falling
edges of the display signal.
Data Risetime
1. On the scope DELTA Volts menu, switch the V Markers ON and set MARKER 1 to the
lower level of the signal (midway into the noise band). Set MARKER 2 to the Hi level
of the signal (midway into the noise band).
2. Press Preset Level 0 to 100% on the scope. This will automatically move markers 1 and
2 to 10 and 90% levels.
3. Center a rising edge transition on the scope display and expand the timebase to
10 ps⁄ div.
4. On the scope DELTA T menu, switch the markers on and set the START MARKER to
the crossover of the V marker on the 10% level of the rising edge (midway into the
edge noise or jitter). Set the STOP MARKER to the crossover of the V marker at the
90% level (midway into the edge noise or jitter).
5. Read the DELTA T value from the bottom of the scope display. Enter this value of
DATA RISETIME on the Calibration Data sheet.
Data Falltime
1. Perform the Preliminary setup if this has not already been done.
2. On the scope DELTA Volts menu, switch the V Markers ON and set MARKER 1 to the
lower level of the signal (midway into the noise band). Set MARKER 2 to the Hi level
of the signal (midway into the noise band).
INST PRESET
trigger & setup
clock output
data output