Specifications

18
Pattern Generator Specifications and Characteristics
(16821A, 16822A, and 16823A)
Clock cable characteristics without a clock pod
The pattern generator clock cables without a clock pod provide an ECL terminated (1 KΩ to
–5.2 V) differential signal (from a type 10E164 driver). These are usable when received by a
differential receiver, preferably with a 100 Ω termination across the lines. These signals
should not be used single ended due to the slow fall time and shifted voltage threshold
(they are not ECL compatible).
100 Ω
Clock in
10E116
7
8
100 Ω
Wait 1, 2, 3 IN
10H125
11, 13, 15
12, 14, 16
–3.25 V
215 Ω
215 Ω
Clock out
10E164
–3.25 V