Wavetek 145 Instruction Manual page 15

Step
1
2
3
4
5
6
7
8
9
10
11
12
13
2-2
MODEL 145 OSCILLOSCOPE
rUNC OUT CH 1
D
-'-
J
l
TRIG
SYNC OUT
T
GCV OUT (REAR PANEL) CH 2
EXT DC OFFSET
FUNCTION GENERATOR
(REAR PANEL)
OR VOLTAGE SOURCE
OUTPUT
INITIALLY OFF
Figure 2-1. Initial Setup
Table 2-1. Acceptance Procedure
Control Position/Operation Observe
POWER ON
1 kHz square wave.
Dial Rotate dial. Return to 1.0.
Rotation ccw increases frequency of square on
one channel and de level on other channel; cw
decreases frequency and de level.
FREQ/PERIOD MULT Rotate switch. Return to 1 K. Rotation cw increases frequency; ccw decreases
frequency (de level not affected).
VERNIER Rotate ccw. Return to CAL.
Rotation ccw gives a small decrease in frequency.
ATTENUATION Rotate ccw. Return to 0. Rotation ccw reduces square wave amplitude.
ATTENUATION VERNIER Rotate ccw. Square wave amplitude decreases.
DC OFFSET Rotate cw. Return to OFF.
Square wave is immediately offset below previous
level; then waveform moves up to a positive level.
OFF returns waveform to original position. (Clip-
ping occurs at ±15V.)
Function Generator or Vary input voltage. Waveform de level varies.
Voltage Source
Remove EXT DC OFFSET IN cable and connect to VCG ll'J connector. Remove GCV OUT cable.
Function Generator or Vary input voltage; then dis-
Voltage Source connect input.
ATTENUATION VERNIER Rotate cw.
FUNCTION Rotate to DC, '\; ,
"v ,
ru ' n ' u '
then '\;
GENERATOR MODE GATE
MANUAL TRIG Press down.
Frequency increases with increased voltage, de-
creases with decreased voltage.
Square wave amplitude increases.
Note de level on scope. '\; ,
"v
and
ru
should be centered on de level.
n
should rest
on de level,
U
should rise to de level.
A de level.
A series of sine waves.