Kenwood CS-2110 Instruction Manual page 24

2. T h e vertical calibration coefficient is n o w the reference
signal's amplitude (in volts) divided by the product of
the vertical amplitude set in step 1 and the V O L T S / D I V
setting.
Using the formula:
Vertical coefficient
Voltage of the reference signal (V)
~ ~ Vertical amplitude (div) x V O L T S / D I V setting
3. Remove the reference signal and apply the unknown
signal to INPUT jack, using the V O L T S / D I V control to
adjust the display for easy observation.
amplitude of the displayed
following relationship to calculate the actual amplitude
of the unknown waveform.
Amplitude of the unknown signal (V)
= Vertical distance (div) x Vertical coefficient
x V O L T S / D I V setting
[ E X A M P L E ]
For the example s h o w n in Fig. 2 1 , the V O L T S / D I V setting
is I V .
T h e reference signal is 2 Vrms. Using the V A R I A B L E c o n -
trol, adjust s o that the amplitude of the reference signal is
4 divisions.
Substituting the given value:
Vertical coefficient = ?-Y
4 (div) x 1 (V)
A /
^Reference signal
Fig. 21
U n k n o w n signal
Fig. 2 2
2 4
A P P L I C A T I O N
Measure the
waveform and use the
r m , s = 0 . 5
/ w t
A d j u s t e d reference signal
Then, measure the unknown
setting is 5 V and vertical amplitude is 3 divisions. (Fig. 2 2 )
Substituting the given value:
Effective value of unknown signal = 3 (div) x 0.5 x 5 (V)
* P e r i o d
Setting the relative s w e e p coefficient with respect to a re-
ference frequency signal.
1. Apply the reference signal to INPUT jack, using the
V O L T S / D I V and V A R I A B L E controls to obtain an easily
observed waveform display.
Using the S W E E P T I M E / D I V and V A R I A B L E controls,
adjust one cycle of the reference signal to occupy a
fixed number of scale divisions accurately. After this is
done be sure not to distrub the setting of the A V A R I -
A B L E control.
2. T h e s w e e p (horizontal) calibration coefficient is then
the period of the reference signal divided by the pro-
duct of the number of divisions used in step 1 for setup
of the reference and the setting of the S W E E P T I M E /
DIV control.
Using the formula:
S w e e p coefficient
Period of the reference signal (sec)
~ Horizontal width (div) x S W E E P T I M E / D I V setting
3. Remove the reference signal and input the unknown
signal, adjusting the S W E E P T I M E / D I V control or easy
observation.
Measure the width of one cycle in divisions and use the
following relationship to calculate the actual period.
Using the formula:
Period of unknown signal = W i d t h of 1 cycle (div) x s w e e p
coefficient x S W E E P T I M E / D I V setting
Reference signal
A d j u s t e d reference s i g n a l
Fig. 2 3
signal and V O L T S / D I V
= 7.5 V rms