TB 9-6625-2294-35
18. CAL 01 - Horizontal
a. Performance Check
(1) Simultaneously press and hold ∆t and ∆V pushbuttons then press and hold
TRIGGER SLOPE pushbutton. Hold in all three pushbuttons for approximately 1 second
and then release. Top of display will indicate: DIAGNOSTIC. PUSH A/B TRIG TO
EXIT.
(2) Press upper TRIGGER MODE pushbutton for CAL 01 (bottom left of display).
CAUTION
Upon entering CAL 01, the input coupling is automatically set
to 50Ω DC and 50Ω overload protection is disabled. Before
starting procedure, make sure any 50Ω overload condition has
been cleared.
NOTE
In this procedure, pressing up and releasing TRIGGER
being set and increments routine to next step (except where
otherwise noted).
NOTE
Throughout this paragraph the INTENSITY and POSITION
controls may be adjusted as necessary for proper viewing of
displayed signal.
(3) Connect digital multimeter HI to TI CALIBRATOR output (front panel) and
LO to chassis ground.
(4) Set digital multimeter to measure dc volts.
(5) Press and release upper TRIGGER COUPLING pushbutton. The display
readout will indicate: ADJ ∆ (step) 0, CH1 PROBE TO FRONT SIDE OF R489.
(6) Connect X10 probe from CH 1 to front side of R489 (TP800) (located at rear of Al
main board near readout connector).
(7) Adjust ∆REF OR DLY POS control to center signal on displayed cursor and
adjust ∆ control to join traces.
(8) Press and release upper TRIGGER COUPLING pushbutton. Check display
readout indicates: ADJ ∆ (step) 1, 100 s (for A sweep), 1 s (for B sweep), and digital
multimeter indicates 0 1 mV dc.
(9) Disconnect Xl0 probe and connect oscilloscope calibrator SOURCE/MEASURE
CHAN 1 to TI CH 1.
(10) Set oscilloscope calibrator MARKER output to 0.1 mS/D output.