MINIMIZING WAVEFORM DISTORTIONS
USE 50 OHM TRANSMISSION LINES
Connect the load to the pulse generator with 50Ω transmission lines (e.g. RG-58 or RG-
174 cable). If possible, use a 50Ω load. If the actual device under test has a high
impedance, consider adding a 50Ω termination in parallel with the load to properly
terminate the transmission line.
The 50Ω output impedance present in the AVR-D3-B will “back-match” the transmission
line, resulting in improved performance.
USE LOW-INDUCTANCE LOADS
Lenz’s Law predicts that for an inductive voltage spike will be generated when the
current through an inductance changes. Specifically, V
SPIKE
= L × dI
LOAD
/dt, where L is
the inductance, I
LOAD
is the load current change, and t is time. For this reason, it is
important to keep any parasitic in the load low. This means keeping wiring short, and
using low inductance components. In particular, wire-wound resistors should be
avoided.
24
Summary of Contents for AVR-D3-B
Page 36: ...PCB 158R5 LOW VOLTAGE POWER SUPPLY ...
Page 37: ...PCB 168C HIGH VOLTAGE POWER SUPPLY ...
Page 38: ...PCB 228C NEGATIVE UV CONTROL PCB ...
Page 39: ...PCB 241C DUAL PW PCB ...
Page 40: ...PCB 335A DUAL TRIGGER ENCODER ...
Page 41: ...PCB 104G KEYPAD DISPLAY BOARD ...
Page 43: ...PERFORMANCE CHECK SHEET ...