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Appendix A: Specifications
CSA8000B & TDS8000B User Manual
A-3
Table A- 2:
System - Timebase (cont.)
Description Characteristics
n Time internal ac-
curacy, locked to in-
ternal 10 MHz refer-
2
Strobe placement accuracy f or a given horizont al interval and posi tion
on same strobe li ne per table below. Contribution from 80E04 sampling
module is i ncluded in speci ficati on.
0
ence mode
2
Range Time Interval Accuracy
≤ 20 ps/div 1 ps + 1% of interval
≥ 21 ps/div 8 ps + 0.01% of interval
Horizontal deskew
range and resoluti on
--500 ps to +100 ns on any individual channel in 1 ps increments.
1
The total number of sampl es contained in a single acquired waveform record
(memory length in IEEE 1057, 2.2.1).
2
This is for ≤ 100 kHz trigger rate. The 80E04 sampling module is included in this
specification.
Table A- 3: System - Trigger
Description
Characteristics
Trigger sources External Direct Edge Trigger, External Prescaled Trigger, Internal Clock
Trigger, and Clock Recovery (with appropriately equipped optical
modules)
Auto/norm al mode Normal mode: wait for trigger
Auto mode: Trigger automatically generated after 100 ms time-out
Slope + or -- select Edge + mode: Triggers on positive-slewing edge
Edge -- mode: Triggers on negative-slewing edge
High frequency on/off
select
High Frequency ON mode: Rem oves trigger hysteresis and improves
sensitivity. Should be used w hen trigger slew rate exceeds 1 V/ns.
High Frequency OFF mode: Ret ains t rigger hysteresis and improves
noise rejection at low slew rates.
Metastability Reject
On/Off select
Metastability Reject On mode: Upon detection of trigger and holdoff
collision, time base will reject the sampled point.
Metastability Reject Off mode: Al lows m etastable point s caused by
trigger/hol doff collisions to display.
Gated Trigger ±5 V maximum. See the Gated Trigger Input descriptions, on beginning
page A--8.
Variable trigger hold
off range and resolu-
tion
Adjustable 5 s to 50 ms in 0.5 ns increments. When External
Prescaled Trigger mode is used, holdoff period applies to the Prescaled
input divided by 8.