Pendulum CNT-90 Series Getting Started Manual

Preparation
For these exercises you will need a '9X' coun
-
ter, a function generator and two BNC cables
of approximately equal length. Set up the gen
-
erator according to the following table, and
connect the main output of the generator to in
-
put A of the counter.
Basic Startup
Since the counter will remember its previous
setting in nonvolatile memory, it is recom
-
mended that you recall the factory default set
-
ting before you begin.
To do so, first key in the following sequence:
USER OPT ® Save/Recall ®
® Recall Setup ® Default.Thenpress
the AUTOSET key twice within two seconds.
The preselected measurement function will be
Frequency, and the trigger levels will be au
-
tomatically adjusted in relation to the applied
signal.
If a signal with a frequency of 20 Hz or higher
and an amplitude large enough to trigger the
counter is connected to input A, its frequency
will now be displayed.
High-Resolution
Frequency
Measurement
Note the high resolution of the primary
readout. Twelve digits are displayed in a mea
-
suring time of 1 s. Don’t worry about the trig
-
ger settings, the AUTO trigger will take care
of any input signal above 20 Hz. This fre
-
quency limit can, if so desired, be changed
down to 1 Hz or up to 100 kHz with a tradeoff
between frequency and measurement speed. If
the generator has been set up properly, you
will now read the frequency (1 MHz) on the
display.
Built-In Math
Processing
With the built-in math functions, you can
make post-processing operations like scaling
and offsetting an easy benchtop task without
having to hook up a computer to the instru
-
ment. You can, for example, display any devi
-
ation from the desired value instead of directly
showing the result of the measurement itself.
This is known as offsetting.
In the following, the direct, unscaled result of
the counter's measurement process will be re
-
ferred to as 'X'.
Exercises
4-2 Preparation
Set up the generator: Function: Square
Wave
Frequency: 1 MHz
Amplitude: 5 V
pp
Modulation: Off
TRIG
GATE
TRIG
pendulum
TIMER / COUNTER / ANALYZE R
100ps / 300MHz
CNT-90
INPUTINPUT
INPUT A
SETTINGSETTING
SETTINGS
MATH / LIM USER OPUSER OP
USER OPT
HOLD / RU
HOLD / RUN
RESTARTINPUTINPUT
INPUT B
A
300 MHz
B
MAX
12Vrms 50
30Vrms 1M
!
C
MAX +30dBm
50
0.2 8GHz
!
Autoset
5V
pp
1 MHz
TRIG
GATE
TRIG
pendulum
TIMER / COUNTER / ANALYZE R
100ps / 300MHz
CNT-90
INPUTINPUT
INPUT A
SETTINGSETTING
SETTINGS
MATH / LIM USER OPUSER OP
USER OPT
HOLD / RU
HOLD / RUN
RESTARTINPUTINPUT
INPUT B
A
300 MHz
B
MAX
12Vrms 50
30Vrms 1M
!
C
MAX +30dBm
50
0.2 8GHz
!
Math/Limit

Pendulum CNT-90 Series Specifications

General

Brand	Pendulum
Model	CNT-90 Series
Category	Measuring Instruments
Language	English