Tektronix CSA8000B - Manual (Page 253)

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 for a given horizontal interval and position
on same strobe line per table below. Contribution from 80E04 sampling
module is included in specification.
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 resolution --500 ps to +100 ns on any individual channel in 1 ps increments.
1
The total number of samples 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/normal 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: Removes trigger hysteresis and improves
sensitivity. Should be used when trigger slew rate exceeds 1 V/ns.
High Frequency OFF mode: Retains trigger 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: Allows metastable points caused by
trigger/holdoff 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.