Section III Model 120B
Figure 3- 1
7
-4
0.c
HEWLC
20 19 18 I7 16 15 14 13 12 11 10 9 8
MP-M- 85
1. FOCUS: Controls crt focus. 11. Vertical POSITION: Controls verticalposi-
tion of crt display.
2. Horizontal VERNIER: Adjusts sensitivity
between ranges; in CAL position, deflec-
12. BAL: Adjust for no vertical shift with ro-
tion as indicated by selected VOLTS/CM
tation of vertical VERNIER.
position of HORIZONTAL DISPLAY switch.
3. HORIZONTAL DISPLAY: 15 positions se- 13. SWEEP MAGNIFIER: In Xl position sweep
lect sweep speed, 3 positions select hori- time selected by HORIZONTAL DISPLAY.
zontal deflection sensitivity. In X5position sweep speed is 5 times faster.
4. TRIGGER LEVEL: Determines level of
14. EXT. SYNC OR HORIZ: External sync or
trigger point on sync signal.
horizontal amplifier input.
5. TRIGGER SOURCE: Four positions select
sweep synchronization. 15. Horizontal AC-DC: AC position input capac-
itively coupled into horizontal amplifier.
6. Vertical VERNIER: Adjusts sensitivity be- DC position input directly coupled into hor-
tween ranges; in CAL position, deflection izontal amplifier.
as selected by VERTICAL SENSITMTY
switch. 16. Z AXIS: Input for crt intensity modulation
signal.
7. VERTICAL SENSITIVITY: Four positions
select deflection sensitivity. CAL position 17. Horizontal POSITION: Controls horizontal
displays internal calibrator signal. position of crt display.
8. CAL: Adjusts calibration of vertical input. 18. BEAM FINDER: Returns beam crt to face
regardless of horizontal and vertical POSI-
9. Vertical input terminals. TION settings.
10. Vertical AC-DC: AC position input capaci- 19. INTENSITY & POWER: Applies ac line
tively coupled into vertical amplifier. DC power and controls crt intensity.
position input directly coupled into vertical
amplifier. 20. SCALE: Aligns trace with graticule.
Figure 3-1. Model 120B Oscilloscope, Front View
01260-1 |
ACEC
