Atec Tektronix-1502 - Manual (Page 40)

TM 9-4935-601-14-3&P
Performance Check
1. Make sure the battery pack is in place and connect the unit to the proper AC power source.
2. Pull the POWER switch to turn the unit on. The BATTERY meter will indicate the relative level of charge
on the battery pack. If the battery pack is fully charged (charged for 16 hours), the BATTERY meter needle will
be approximately at the top mark on the meter.
Performance Checks-Standard Version (See Step 31 for Option 5, Metric Version)
3. Set the front panel controls as follows:
INTENSITY Fully cw
ZERO REF Fully cw
POSITION Midrange
mp/DIV 500
DISTANCE 000
NOISE FILTER Out
FEET/DIV 200
MULTIPLIER X1
CABLE DIELECTRIC
SOLID POLY In
SOLID PTFE Out
Other Out
VAR Fully cw
4. Connect the probe adapter to the CABLE connector if the connector is the grounding type (grounded
CABLE connector used SN B040616 and up). Preset the POSITION and GAIN controls so the trace is on
screen and the amplitude is approximately 4 divisions. Adjust the FOCUS AND INTENSITY controls for a
clear, bright trace.
5. Adjust the GAIN control so that the total amplitude of the display is exactly 4 divisions. (If unable to
adjust the GAIN control properly, check the Gain Amplifier or Vertical Amplifier Circuits.)
6. Change the FEET/DIV control to 2 and the MULTIPLIER to X.1.
7. Turn the ZERO REF SET control counterclockwise to locate the pulse at center screen. Check for
correct waveform as shown in Fig. 4-1a. (If the display is not correct, check the sampling circuitry, avalanche
and Snap-off adjustments.) See adjustment procedure for case removal instructions.
8. Remove the probe adapter and connect the precision 50
Ω
terminator (Tektronix Part No. 011-0123-
00) to the CABLE connector. Turn the GAIN control fully counterclockwise and note the amplitude of the pulse.
Turn the GAIN control fully clockwise. The amplitude should be 3.5 times greater than the amplitude with the
GAIN control fully counterclockwise. (Adjust the POSITION control as necessary.)
9. Set the mp/DIV control to200, the FEET/DIV control to 20 and the MULTIPLIER control to X1.
10. Adjust the ZERO REF SET control so that the pulse is at the center of the screen. Adjust the GAIN
control for exactly 5 divisions of amplitude.
Figure 4-1. Pulse Display.
REV B FEB 1980
4-2