Model 166D. MX-2962/USM-l05A section VI
Paragraphs 6-1 to 6-3
SECTION VI
SERVICE AND REPAIR
6A PREVENTIVE MAINTENANCE
6-1. INTRODUCTION. of the Model 166D withaut loss of accuracy, periodi-
cally check the +110 volt and -100 volt power supply
No preventive maintenance is requiredfortheMode1 voltages in the 160B and 170A Oscilloscopes in which
166D Delay Generator except an occasional visual in- the Model 166D is to be used, and maintain the output
spection. However, to preserve the interchangeability of these supplies within 0.4% of their nominal values.
66 PERFORMANCE STANDARDS
6-2. TEST EQUIPMENT. Note
Test equipment required for the performance check
The delay time accuracy of the Model
aid adjustmentoftheModel166Dislistedin 'table 6-1.
166D depends on the +110 and -100 volt-
Equipment of equivalent characteristics may be sub- ages supplied by the oscilloscope. These
stituted for those listed.
voltages should be adjusted to within
0.4% of their normal values before per-
6-3. PERFORMANCE CHECKS.
formance checks or adjustments are
Performance checks for the Mcdel 166D. plugged made. Refer to the oscilloscope Oper-
into an @ Model 160B or Model 170A Oscilloscope, ating and Servicing Manual for adjust-
are given in tables 6-2, 6-3, and 6-4. ment procedure.
Table 6-2. Trigger Sensitivity
@I608 OR qI?OA
osclLLosc PE
OSClLLOSCOPE :
VERTICAL SENSITIVITY TO I volT/CM
VERNIER TO CALIBRATED
SWEEP TIME TO 1 MILLISECOND/CM
CALIBRATOR TO .2
MODEL 166D:
TRIGGER LEVEL TO 0
I I TRIGGER SLOPE TO 4-
I SWEEP MODE TO PRESET
10 TRIGGER SOURCE TO IN1
Read
Step Preliminary Action Performance Standard
Indication On
1 Connect VOLTS terminal of calibrator to vertical INPUT Oscilloscope Sweep triggered without
and to Model 166D trigger INPUT. jitter.
2 Switch TRIGGER SOURCE to EXT and CALIBRATOR Oscilloscope Sweep triggered without
to .5. jitter.
01227-1 6- 1 |