Display Update (Unit Tester)

TB 9-4920-361-24

22. Display Update (Unit Tester)

a. Performance Check

(1) Connect equipment as shown in figure 6.

Do not disconnect equipment

connected in figure 1.

(2) Set DISPLAY UPDATE switch to ON.

Figure 6. Display control - equipment setup.

NOTE

When measuring negative pulse amplitude with oscilloscope,

disconnect frequency counter after verifying frequency.

(3) Set ON-OFF-SIM ONLY switch to ON. Oscilloscope will indicate negative

pulses between 4.0 and 6.0 V and frequency counter will indicate between 1300 and 1900 Hz.

(4) Set DISPLAY UPDATE and ON-OFF-SIM ONLY switches to OFF.

(5) Repeat technique of (2) through (4) above, connecting lead to pin connections

listed in table 6. Oscilloscope and frequency counter will indicate within limits specified.

b. Adjustments. No adjustments can be made.