SECTION IV

TB 9-6625-2295-35

Select 10 Hz (2 pushbutton) and press.

NOTE

After the 50 ms and 100 ms checks are made, return

MINFREQ to 50 Hz.

b. Adjustments

(1) Press POWER pushbutton to OFF, remove protective cover, and move CAL

NO/CAL jumper to the CAL position.

(2) Press POWER pushbutton to ON and allow 20 minutes warm-up.

(3) 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: DIAGNSTIC.PUSH A/B TRIG TO EXIT.

14. Final Procedure

a. Deenergize and disconnect all equipment.

b. Annotate and affix DA label/form in accordance with TB 750-25.

MENU CALIBRATION PROCESS

15. Preliminary Instructions

a. The procedures in paragraphs 17 through 24 should be performed only if an out-of-

tolerance condition exists in paragraphs 8 through 14 or if an error message on the bottom

line of the CRT display is:

TEST 04 XX

Where XX is 01, 02, 10, or 11 when POWER pushbutton is pressed to ON.

b. When performing paragraphs 19 through 24, touch only the specific control or

controls called out in the procedure. Movement of any other control may cause erroneous

c. Within the automatic calibration procedure, the calibration constants for timing,

vertical gain, and trigger level are generated by the system microprocessor and stored in

nonvolatile memory. The adjustments in CAL 01, 02 and 03 should be done in numerical

sequence.

d. When performing automatic CAL steps, initial setting of front-panel controls is not

required.