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Adjustment Procedures
THS710A, THS720A, THS730A & THS720P Service Manual
5–7
After removing the adjustment-lockout jumper, use this procedure to adjust the
oscilloscope voltage references.
1. Turn on the TekScope instrument and let it warm up for at least ten minutes.
2. Connect the fast rise square wave generator to the instrument as shown in the
Square wave generator setup of Figure 5–2.
3. Set the fast rise square wave generator to produce an amplitude between
250 mV
p-p
and 300 mV
p-p
, and frequency between 450 Hz and 950 Hz
(inclusive).
4. Use the TekScope instrument setup below to start the oscilloscope adjust-
ment process. For each step, follow the specific instructions displayed by the
instrument to connect the correct signal source and then confirm that you are
ready to proceed to the next step.
SCO
PE
UTI
L
ITY
System Cal
Factory Scope
—
OK Factory Cal Scope
NOTE. During some steps, the instrument may appear to be idle for several
minutes while it is processing information internally. Please have patience.
If any step in the procedure fails, the procedure terminates. Failure will result if
an incorrect signal source is connected. If this happens, you must start the
procedure over from the beginning.
If the procedure completes successfully, a “Pass” message is displayed and the
new adjustment takes effect.
After adjusting the oscilloscope, continue with one of the following steps:
H Proceed to Meter Adjustment on page 5–8 to adjust the meter voltage
references.
H Proceed to Replacing the Adjustment-Lockout Jumper on page 5–11 to
protect the instrument from inadvertent readjustment.
Oscilloscope Adjustment
Procedure
Completing the
Adjustment Process