6.9.3.3 TDC adjustment
6.9.3.3.1 Auto-adjustment
Adjusts the TDC (verifies time axis during RIS mode operation) automatically.
Adjustment method
(1) Without inputting any signal, run “Automatic Adjustment – TDC” in
the “Mainenance1” menu.
(2) After adjustment is completed, click "Save to HW” to save to the
EEPROM.
6.9.3.3.2 Manual adjustment
In the “Maintenance1” menu, verify that “Other Adjustment – TdcGain “ has a default value of
135.
6.9.3.4 Trigger delay adjustment
Adjustment standard ±100ps (pre-trigger)
Setting CHx ⇒ DC 50Ω 10mV/div
Timebase ⇒ RIS, 1ns/div, Delay: 0ns (center of display screen)
Adjustment method
(1) Input a signal from the SG-503 and set the trigger level to roughly the
midpoint of the amplitude.
(2) With PERSIST ON, adjust “TrigDelay” of the “Maintenance2” menu
such that the actual trigger point (portion of the observed waveform
that forms the pivot point) coincides with the trigger delay indicator
when the signal frequency is varied within the range of
approximately 10MHz to 150MHz.
(3) Click “Save to HW” to save to the EEPROM.
Note: The trigger delay indicator is an arrow displayed at the bottom border of the grid. The trigger
delay indicator differs from and should not be confused with the trigger level indicators that
are displayed at the right and left borders of the grid.
Maintenance 6-41
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