Atec Tektronix-1502 - Manual (Page 18)

TM 9-4935-601-14-3&P
Figure 2-3. 1502 Front Panel Controls.
7. GAIN Screwdriver adjust to set the gain 13. DISTANCE Indicates the distance from the
of the vertical amplifier. 1502 to the point on the cable
where the display window begins.
Two ranges: 100 feet (25 m) at X.1
8. NOISE FILTER Reduces displayed noise. Display or 1000 feet (250 m) at X1.
rate is reduced by a factor of 10. Disabled when the FEET/DIV
(METRES/DIV) is at 200 (FIND)
(50).
9. BATTERY Meter to indicate the relative
charge of the power pack.
14. FEET/DIV Selects the horizontal deflection
10. ZERO REF Momentary contact pushbutton. (METRES/DIV) factor:
CHECK When pushed, checks the horizon- X1 = 1 - 200 ft/div (25 cm -
tal location of the incident pulse on 50 m/div).
the crt when the DISTANCE dial is
being used.
X.1 = 0.1 - 20 ft/div (2.5 cm -
5 m/div).
11. ZERO REF SET Horizontal pulse position control
for crt display. Sets the incident
pulse edge to a vertical reference
line of the crt when the DISTANCE
15. CABLE Three pushbuttons and a screw-
dial is at 000 or the ZERO REF DIELECTRIC driver adjust. Selects the proper
CHECK button is at pushed. SOLID POLY velocity of propagation. VAR from
0.55 to 1.0 when the OTHER
SOLID PTFE pushbutton is pressed. Fully CW is
12. MULTIPLIER Two-position switch (red control) for air dielectric. VAR control has
for X.1 or X1 multiplier. Affects OTHER VAR reference marks every 30° to in-
both the DISTANCE dial and the dicate relative propagation con-
FEET/DIV (M ETRES/DIV) control. stants.
REV B FEB 1980
2-3