Digital Signal Processing Reference
In-Depth Information
D.2.5
Horizontal
•
Range
54621A/D, 54622A/D, 54624A: 5 ns/div to 50 s/div
54641A/D, 54642A/D: 1 ns/div to 50 s/div
•
Resolution
54621A/D, 54622A/D, 54624A: 25 ps
54641A/D, 54642A/D: 2.5 ps
•
Vernier
1-2-5 increments when off, ~25 minor increments between major
settings when on
•
Reference positions
Left, center, right
•
Delay range
54621A/D, 54622A/D, 54624A:
Pre-trigger (negative delay):
Greater of 1 screen width or 10 ms
Post-trigger (positive delay):
500 seconds
54641A/D, 54642A/D:
Pre-trigger (negative delay):
Greater of 1 screen width or 1 ms
Post-trigger (positive delay):
500 seconds
•
Analog delta-t accuracy
54621A/D, 54622A/D, 54624A: Same channel: ±0.01% reading
±0.1% screen width ±40 ps
Channel-to-channel: ±0.01% read-
ing ±0.1% screen width ±80 ps
54641A/D, 54642A/D: Same channel: ±0.005% reading
±0.1% screen width ±20 ps
Channel-to-channel: ±0.005% read-
ing ±0.1% screen width ±40 ps
Same Channel Example (54641A/D, 54642A/D): for signal with
pulse width of 10
µ
s, scope set to 5
µ
s/div (50
µ
s screen width),
delta-t accuracy = ±{.005%(10
µ
s) + 0.1%(50
µ
s) + 20 ps} = 50.52 ns
•
Digital delta-t accuracy
54621A/D, 54622A/D, 54624A: (non-Vernier settings)
Same channel: ±0.01% reading ±0.1% screen width ±(1 digital
sample period, 2.5 or 5 ns based on sample rate of 200/400
MSa/s)
