Atec Tektronix-1502 - Manual (Page 19)

TM 9-4935-601-14-3&P
16. RECORD Two-position lever switch; pushed up and then
released, it initiates X-Y recorder or a chart
recorder.
17. AC LINE
FUSES Protection fuses for line power and battery
charging circuits (0.5 A fuses for 115 V ac; 0.3
A fuses for 230 V ac).
PLUG-IN Controls and Connectors
1. X-Y
OUTPUT The standard plug-in module for the 1502.
Used to drive an external X-Y Chart
MODULE Recorder.
X, Y, and
PEN LIFT Six front panel jacks used for driving an external
X-Y recorder. X jacks are for horizontal drive. Y
jacks are for vertical drive. PEN LIFT jacks are
for pen control.
2. Y-T CHART
RECORDER An optional TEKTRONIX Y-T Chart Recorder
which replaces the X-Y OUTPUT MODULE.
OPERATIONAL CHECKOUT
To check the operation of the 1502, follow these step-by-step procedures:
1. Preset the front panel controls as follows:
FOCUS Midrange
INTENSITY Midrange
ZERO REF Fully cw
POSITION Midrange
mp/DIV 500
DISTANCE 000
FEET/DIV 1
(METRES/DIV) (.25)
X1 - X.1 X1
CABLE DIELECTRIC SOLID POLY
2. Adjust the INTENSITY and FOCUS controls for a clear
bright trace.
3. Adjust the POSITION controls to set the trace 2 divisions
below the horizontal centerline.
4. Attach the precision 50
Ω
cable (012-0482-00) to the CABLE connector.
5. Turn the ZERO REF SET button ccw until the incident pulse edge is located on a vertical reference line.
The incident pulse edge is the initial rise of the step pulse. The vertical reference line may be any line you
choose from the center line to the left side of the crt graticule. We have added an arrow in the second vertical
line to indicate a commonly used reference line.
The reflected pulse from the open end of the 50
Ω
cable should appear 3 horizontal divisions to the right
of the reference line in the non-metric version only. The open end of the cable is indicated by the start of a
second rise in the trace (see Fig. 2-4).
6. Turn the ZERO REF SET control throughout its range to see the incident pulse edge can be set on any
vertical graticule line. Set the incident pulse edge on the vertical reference line.
7. Set the DISTANCE dial to 050 and check that the top of the step (open cable reflection) is displayed.
8. Press the ZERO REF CHECK button and check that the incident pulse edge returns to the vertical
reference line of the graticule. Reset the DISTANCE dial to 000.
REV B FEB 1980
Figure 2-4. Incident and Reflected Pulses.
2-4