300mV range
VR102
(Unless otherwise specified, the above connection should be used as to the follow-
ing items.)
RANGE: 300 mV
1) Input a 1 kHz (or 400 Hz), 300 mVrms sine wave, and set the pointer to 3.0 of the
0-3 scale. Check that the variable range is less than 98% and more than 102%
with respect to 3.0 (full-scale).
2) Waveforms shown on the oscilloscope shall not be deformed.
ITEM
PROCEDURE
ADJUSTMENT POINT
Oscilloscope
50
Ω
oscillator
Main unit
CAL
OUT
IN
Oscillator or calibrator
Oscillator
Calibrator
OK
NG
NG
OUT
OUT
VT-181/VT-181E
7
ADJUSTMENT
To obtain the best performance, periodically calibrate the
unit. Sometimes, only one mode need be calibrated, while at
other times, all modes should be calibrated. When one
mode is calibrated, it must be noted that the other modes
may be affected. When calibrating all modes, perform the
calibration in the specified sequence.
The following calibration required an accurate measuring
instrument and an insulated adjusting flat blade screwdriver.
If they are not available, contact your dealer. For optimum
adjustment, turn the power on and warm up the scope suffi-
ciently (more than 30 minutes) before starting.
Before calibrating the unit, check the power supply voltage.
TEST EQUIPMENT REQUIRED
The following instrument or their equivalent should be used
for making adjustment.
PREPARATION FOR ADJUSTMENT
Control Settings
The control settings listed below must be used for each
adjustment procedure.
Exceptions to these settings will be noted as they occur.
After completing a adjustment, return the controls to the fol-
lowing settings.
Test Equipment
Digital Multimeter
Frequency Counter
Oscilloscope
Model
DL-712
FC-756
CS-6010
Maker
KENWOOD
KENWOOD
KENWOOD
NAME OF KNOBS
RANGE
RELATIVE REF
POSITION
VT-181 : 300V
VT-181E : 100V
CAL
Test Equipment
Calibrator
CR Oscillator
Attenuator
Q-Meter
Distortion Meter
Insulation Meter
50
Ω
Termination
Model
5100B
AG-203
RA-920
4343B
885
SM-5
TA-57
Maker
FLUKE
KENWOOD
KENWOOD
YHP
Shibasoku
TOA
KENWOOD
VT-181/VT-181E(K)
INT
98.4.9
11:46
AM
y [ W 14
Summary of Contents for VT-181
Page 15: ...A C E B D 2 1 3 5 7 4 6 VT 181 SCHEMATIC DIAGRAM VT 181 VT 181E K INT 98 4 9 10 31 AM y W 16 ...
Page 16: ...F G I H J 2 1 3 5 7 4 6 VT 181E SCHEMATIC DIAGRAM VT 181 VT 181E K INT 98 4 9 10 31 AM y W 13 ...
Page 17: ...K M O L N 2 1 3 5 7 4 6 VT 181 SCHEMATIC DIAGRAM VT 181 VT 181E K INT 98 4 9 10 31 AM y W 12 ...
Page 18: ...P Q S R T 2 1 3 5 7 4 6 VT 181E SCHEMATIC DIAGRAM VT 181 VT 181E K INT 98 4 9 10 31 AM y W 9 ...
Page 19: ...U W Y V X 2 1 3 5 7 4 6 VT181 VT181E VT 181 VT 181E K INT98 4 910 31AM y W 8 ...
Page 20: ...Z AA AC AB AD 2 1 3 5 7 4 6 VT 181 VT 181E K INT98 4 910 31AM y W 5 ...
