6-46 Maintenance
Interval trigger time
Adjustment standard ± (0.5% + 0.5ns)
Setting Trigger Ref4 at time of adjustment: Smart Trigger - Interval - Greater Than
Ref3 at time of adjustment: Smart Trigger - Interval - In Range –
Limits
Slope: Positive
LEVEL: Midpoint of amplitude
Adjustment method Set the amplitude of the signal source to approximately 6.0div. Open the
“Maintenance1” menu and adjust as indicated below, using SG-503 as
the signal source.
After the adj is complete, click ”Save To HW” to save to the EEPROM.
Note: Prior to adjustment, click “Special Mode” in the “Maintenance1” menu (to enable the
interval trigger).
Adjustment item Time setting Adjustment method
4ns Ref4 Lower Limit 4.0ns Adjust to achieve sync with a freq of 250MHZ or lower.
8ns Ref4 Lower Limit 8.0ns Adjust to achieve sync with a freq of 125MHZ or lower.
32ns Ref4 Lower Limit 32ns Adjust to achieve sync with a freq of 31.25MHZ or lower.
64ns Ref4 Lower Limit 64ns Adjust to achieve sync with a freq of 15.625MHz or lower.
4ns Rref3 2.0ns≤W≤4.0ns Adjust to achieve sync with a freq of 250MHZ or higher.
8ns Ref3 2.0ns≤W≤8.0ns Adjust to achieve sync with a freq of 125MHZ or higher.
32ns Ref3 2.0ns≤W≤32ns Adjust to achieve sync with a freq of 31.25MHZ or higher.
64ns Ref3 2.0ns≤W≤64ns Adjust to achieve sync with a freq of 15.625MHz or higher.
6.9.3.9 Adjustment of time difference between channels
Adjustment standard ±20ps or less (10mV/div) for CH1
Setting All CHs ⇒ DC 50Ω 10mV/div
Timebase ⇒ RIS 1ns/div or more
Trigger ⇒ Delay: 0ns (center of display screen)
Adjustment method
(1) Input a high-speed pulse signal (or an approximate 200MHz sine
wave signal) through a divider to CH1 and CHX.
(2) Open the “Maintenance1” menu, and using the “Skew” parameter
measurement, adjust the Channel Adjustment Value of “Delay CHX”
so that the rising (and falling) portions of CH1 and CHX become
aligned.
Note: CH1 is a reference and is therefore fixed at ” 511.”
(3) Click ”Save To HW” to save to the EEPROM.
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