UNISource Corporation FC-8300 User manual
Operation Manual
FC-8300 3.7GHz Frequency Counter
FC-8030 3.0GHz Frequency Counter
FC-8150 1.5GHz Frequency Counter
FC-8030U 3.0GHz Universal Counter
FC-8150U 1.5GHz Universal Counter
UNISOURCE CORPORATION
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3
Introduction
Thank you for purchasing our product. Electronic measuring instruments produced
by us are high technology products made under strict quality control. We guarantee
their exceptional precision and utmost reliability. For proper use of the product,
please read this operation manual carefully.
Note
1. To fully maintain the precision and reliability of the product use it within the range
of standard setting( temperature 10 °C~35 °C, humidity 45%~85%)
2. After turning of power, please allow a pre-heating period of as long as some 30
minutes before use.
3. This equipment should be used with a triple line power cord for safety.
4. For quality improvement the exterior design and specification of the product can
be changed without prior notice.
5. If you have further questions concerning use, please contact our service center or
sales outlet.
Safety Summary
Please take a moment to read these operating instructions thoroughly and
completely before operating this instrument. Pay particular attention to WARNINGS
used for conditions and actions that pose hazard to the user and CAUTIONS used
for conditions and actions that may damage the instrument.
Always to inspect the instrument and other accessories for any sign of damage
or abnormality before every use.
Never ground yourself and keep your body isolated from ground.
Never touch exposed wiring, connections or any live circuit conductors.
Do not install substitute parts or perform any unauthorized modification to the
instrument.
Use caution when working above 60V DC or 30V AC rms. Such voltages pose
a shock hazard.
Remember that line voltage is present on some power input circuit points such
as on-off switches, fuse, power transformers, etc., even when the equipment is
turn off.
Also, remember that high voltage may appear at unexpected points in defective
equipment.
Safety Symbols
DANGEROUS VOLTAGE
AC-ALTERNATING CURRENT
DC-DIRECT CURRENT
SEE EXPLANATION IN MANUAL
GROUND
FUSE
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CONTENT
1. PRODUCT DESCRIPTION
1-1. Introduction ------------------------------------------------------ ( 5 )
1-2. Technical Specifications -------------------------------------- ( 6 )
1-3. Equipment Ratings --------------------------------------------- ( 9 )
1-4. Supplied Accessories ------------------------------------------ ( 9 )
2. INSTALLATION
2-1. Initial Inspection ------------------------------------------------- (10)
2-2. Connecting AC Power ----------------------------------------- (10)
2-3. Cooling and Ventilation ---------------------------------------- (10)
2-4. Position ------------------------------------------------------------ (10)
2-5. Warming-Up ------------------------------------------------------ (10)
3. OPERATION
3-1. Controls, indicators and connectors ------------------------ (11)
3-2. Operating instruction ------------------------------------------- (17)
3-3. Frequency Measurements ------------------------------------- (17)
3-4. Period Measurements ------------------------------------------ (18)
3-5. Total Measurements -------------------------------------------- (18)
3-6. RPM measurement ---------------------------------------------- (19)
3-7. Time interval measurement(A-B)----------------------------- (19)
3-8. Ratio Measurement (A/B)-------------------------------------- (20)
3-9. Use of RS-232C Serial Interfacing-------------------------- (21)
4. MAINTENANCE
4-1. Fuse Replacement ---------------------------------------------- (22)
4-2. Adjustment and Calibration ----------------------------------- (22)
4-3. Cleaning and decontamination ------------------------------- (22)
5. OTHERS
5-1. BNC Cable Considerations ----------------------------------- (23)
5-2. Use of Attenuator probes ------------------------------------- (23)
5-3. Line Frequency Measurements ------------------------------ (24)
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1. PRODUCT DESCRIPTION
1-1. Introduction
This reciprocal UNIVERSAL (FREQUENCY) COUNTER series are microprocessor
controlled instrument for frequency measurement at high resolution within a short
period of 7 digit display with one second gate time due to uniquely developed LSI as
well as the expanding/reciprocal system. It covers a frequency range from 0.1Hz to
3.7 GHz (FC-8300: 3.7GHz, FC-8030/8030U: 3.0GHz, FC-8150,8150U: 1.5GHz)
based on 10MHz time base T.C.O (temperature controlled oscillator) and also
featuring,
FC-8150U/ FC-8030U Universal Counter
Trigger Function
Time Interval Measurement Function
Frequency Ratio Measurement Function
Common or Separate Input Selection
External Frequency Standard Input with 9 Digits LED Display
Attenuator
Check
Period
Total
Low Pass Filter
Line Filter
FC-8300 / FC-8030 / FC-8150 Frequency Counter
RPM(Rotation Per Minute) Measuring Function
External Frequency Standard Input with 9 Digits LED Display
Attenuator
Check
Period
Total
Low Pass Filter
Line Filter
A self-test mode is also provided for a quick check of several facets of operation.
Each operating mode can be selected by front panel push button switches with
automatic decimal points and indicators. The high accuracy, sensitivity and
versatility of this counter make it an extremely valuable instrument to the scientist,
engineer, experimenter and communications technician. Light weight and compact
size make it practical for use by the hobbyist or field technicians.
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1-2. Technical Specifications
INPUT A CHARACTERISTICS
•FREQUENCY RANGE : 0.1Hz to 100MHz (DC Coupled)
30Hz to 100MHz (AC Coupled)
•SENSITIVITY : 0.1Hz to 100MHz: 30mV
•COUPLING : AC or DC Selectable
•IMPEDANCE : 1 M ΩResistance, Shunted by < 40pF
•ATTENUATOR : x 1 or x 10 Switch Selectable
•LOW PASS FILTER : -3dB Point of 100KHz, Switch Selectable
•TRIGGER LEVEL : + 350mV to - 350mV (PRESET 0V)
<FC-8150U, FC-8030U only>
•
••
•SLOPE : Positive or Negative Slope Switch Selectable
< FC-8150U, FC-8030U only>
* NOTE: Trigger error is typically ±0.3% of reading by the number of cycles
averaged for input signals having better than 40dB S/N ratio and greater than
100mV amplitude.
•
••
•RESOLUTION AND NUMBER OF DISPLAYED DIGIT
Time Base Selector INT EXT INT EXT INT EXT INT EXT
Gate Time 0.01S 0.1S 1S 10S
Number Of Displayed Digit 5 6 6 7 7 8 8 9
Frequency (Input A,B) RESOLUTION
0.1 Hz-0.99 Hz 10 uHz 1 uHz 1 uHz 0.1 uHz 0.1 uHz 10nHz 10nHz 1nHz
1Hz-9.9Hz 0.1 mHz 10 uHz 10 uHz 1 uHz 1 uHz 0.1 uHz 0.1 uHz 10nHz
10 Hz-99 Hz 1 mHZ 0.1 mHz 0.1 mHz 10 uHz 10 uHz 1 uHz 1 uHz 0.1 uHz
100 Hz-999 Hz 10 mHz 1 mHz 1 mHz 0.1 mHz 0.1 mHz 10 uHz 10 uHz 1 uHz
1 KHz-9.9 KHz 0.1 Hz 10 mHz 10 mHz 1 mHz 1 mHz 0.1 mHz 0.1 mHz 10 uHz
10 KHz-99 KHz 1 Hz 0.1 Hz 0.1 Hz 10 mHz 10 mHz 1 mHz 1 mHZ 0.1 mHz
100 KHz-999 KHz 10 Hz 1 Hz 1 Hz 0.1 Hz 0.1 Hz 10 mHz 10 mHz 1 mHZ
1 MHz-9.9 MHz 100 Hz 10 Hz 10 Hz 1 Hz Hz 0.1 Hz 0.1 Hz 10 mHz
10 MHz-99 MHz 1 KHz 100 Hz 100 Hz 10 Hz 10 Hz 1 Hz 1 Hz 0.1 Hz
100 MHz 10 KHz 1 KHz 1 KHz 100 Hz 100 Hz 10 Hz 10 Hz 1 Hz
•ACCURACY : ±Time base Error ±Resolution(Table 1)
•PERIOD RANGE : 10 nS to 10 S
•DISPLAY : n. u. m., Sec with decimal point
•TOTAL RANGE : DC to 30 MHz
CAPACITY : 0 to 999 999 999
OVERFLOW :“OF”
•RPM RANGE : 6 to 600 x 10 7RPM , OVER FLOW : “OF”
<FC-8150,FC-8030,FC-8300 only>
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•MAX. INPUT VOLTAGE LEVEL
FIG 1. MAX. Input Level. (input A,B)
INPUT B. CHARACTERISTICS < FC-8150U, FC-8030U >
•FREQUENCY RANGE : 0.1Hz to 100MHz (DC Coupled)
30Hz to 100MHz (AC Coupled)
•SENSITIVITY : 0.1Hz to 100MHz: 30mV
•COUPLING :ACorDCSelectable
•IMPEDANCE :1MΩResistance, Shunted by < 40pF
•ATTENUATOR : x 1 or x 10 Switch Selectable
•LOW PASS FILTER : -3dB Point of 100KHz, Switch Selectable
•SLOPE :PositiveorNegativeSwitchSelectable
* Resolution and Number of displayed digit (Table 1): Same as INPUT A
* Max. INPUT VOLTAGE LEVEL (FIG 1): Same as INPUT A
TIME INTERVAL(A→
→→
→B) < FC-8150U, FC-8030U >
•RANGE : 0.1 uSec-10Sec(0.1Hz-10MHz)
•LSD : 100nSec
•RESOLUTION :±LSD ±Trigger Error*
•ACCURACY : ±LSD ±Trigger Error ±Time base error x T.l
•MULTIPLIER : 1,10,100,1000 (Gate Time: 10S,1S,0.1S,0.01S)
RATIO(A/B) < FC-8150U, FC-8030U >
•RANGE : 0.1Hz to 10MHz(input A)
: 0.1Hz to 10MHz(input B)
•RESOLUTION :±LSD ±(B TrIg. ERROR x FREQ. A)/N
•ACCURACY : ±1 COUNT of A ±B TRIG. ERROR x FREQ. A.
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INPUT C. CHARACTERISTICS
•FREQUENCY RANGE & SENSITIVITY
Model Frequency Range Sensitivity
FC-8150
FC-8150U 80MHz – 1.5GHz 35mVrms from 80 MHz to 1.1 GHz
70mVrms from 1.1GHz to 1.5 GHz
FC-8030,
FC-8030U 80MHz – 3.0GHz 25mVrms from 80 MHz to 150 MHz
20mVrms from 150MHz to 2.0 GHz
40mVrms from 2.0GHz to 3.0GHz
FC-8300 80MHz – 3.7GHz 10mVrms from 80 MHz to 2.0GHz
20mVrms from 2.0GHz to 3.0GHz
30mVrms from 3.0GHz to 3.2GHz
40mVrms from 3.2GHz to 3.5GHz
70mVrms from 3.5GHz to 3.7GHz
•COUPLING :AConly
•IMPEDANCE :50Ω±5%
•MAX. INPUT LEVEL : 3 Vrms sine wave
•RESOLUTION AND NUMBER OF DISPLAYED DIGIT
Time Base Selector INT EXT INT EXT INT EXT INT EXT
Gate Time 0.01S 0.1S 1S 10S
Number Of Displayed Digit 5 6 6 7 7 8 8 9
Frequency (Input B) RESOLUTION
80MHz-99MHz 1 KHz 100 Hz 100 Hz 10 Hz 10 Hz 1 Hz 1 Hz 0.1 Hz
100 MHz-999 MHz 10 KHz 1 KHz 1 KHz 100 Hz 100 Hz 10 Hz 10 Hz 1 Hz
1GHz-3.7GHz 100 KHz 10 KHz 10 KHz 1 KHz 1 KHz 100 Hz 100 Hz 10 Hz
(Table 2)
TIME BASE CHARACTERISTICS
•TYPE : TCO (Temperature controlled oscillator)
•FREQUENCY : 10.000000 MHz
•STABILITY :±1 PPM(±1 count)
•LINE VOLTAGE STABILITY : Less than ±1 PPM with ±10% line voltage
variation.
•TEMPERATURE STABILITY : ±5 PPM from 0°C to 50°C
•MAX. AGING RATE : ±5 PPM/year
•INT. STD. OUT : 10 MHz(internal standard frequency output)
•LEVEL : 1 Vpp or more.
•IMPEDANCE :Approx.600Ω
•EXT. STD. IN : 10 MHz(external standard frequency input)
•LEVEL : 1.5 Vrms to 5Vrms
•IMPEDANCE :Approx.600Ω
DISPLAY CHARACTERISTICS
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•DISPLAY : Nine Digit 0.56" LED with M/n, K/u, Hz, m, Sec, G.T, Hold, and
“OF” indicators. Function and Gate time: User Selected.
“OF” Display Shown When Count exceeds 999 999 999
•HOLD : In Frequency and Period, TOTAL. Mode measurement in
progress is stopped, and the last complete measurement is
displayed. When Hold is released, a new measurement begins.
•GATE TIME : Dipending on input frequency
< 10mS------------Somewhere between 0.9 and 9mS
< 0.1S--------------Somewhere between 9 and 90mS
< 1S---------------- Somewhere between 90 and 900mS
< 10S---------------Somewhere between 0.9 and 9S
NOTE: LAST MEASUREMENT DISPLAY WILL REMAIN FOR 10 SECONDS
AFTER SIGNAL OFF.
DIMENSION AND WEIGHT
•Dimensions : 240(W) x 90(H) x 270(D)mm
•Weight : Approx. 2.5 kg.
1-3. Equipment Ratings
Power : 230VAC ±10% , 50-60 Hz, 15 W <8023, 8030U>
230VAC±10% , 50-60 Hz, 9 W<8013,8030, 8037>
Plug and Socket: 3 wire ac power plug and 3 wire outlet
Fuse : 200 mA/250V F type
Operating Environment:
TEMPERATURE : 0 °C to + 40 °C (Accuracy Specified at 23°C ±5 °C)
HUMIDITY : Up to 85% to 40°C without temperature extremes
causing condensation within the instrument.
Storage Environment
TEMPERATURE: -20°C to +70°C
HUMIDITY : below 85% RH
Insulation Category II : Portable equipment of local level.
Pollution Degree : 2
Protection to IEC 529 : Ordinary
1-4. Supplied Accessories
User’s Manual ------------------------------------------------------------1
BNC cable -----------------------------------------------------------------1
Power cord-----------------------------------------------------------------1
Spare Fuse-----------------------------------------------------------------1
* Specifications are subject to change without notice.
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2. INSTALLATION
2-1. Initial Inspection
This instrument was carefully inspected both mechanically and electrically before
shipment. It should be physically free of damage. To confirm this, the instrument
should be inspected for physical damage in transit. Also, check for supplied
accessories.
2-2. Connecting AC Power
This instrument requires 230V AC (50-60 Hz) power socket with protective earth
contact (PE-contact). If is available only a power socket without PE-contact (so a
2-conductor ac power) then a power socket with PE-contact must be installed
before or the appliance should be provided with a PE-screw-terminal which is not
soluble by hand and not soluble before 2-conductor power lines.
CAUTION
THIS INSTRUMENT IS SET TO AC 230V. BEFORE POWERING ON THIS
INSTRUMENT, MAKE SURE THE VOLTAGE OF THE POWER SOURCE IS AC
230V.
2-3. Cooling and Ventilation
No special cooling and ventilation is required. However, the instrument should be
operated where the ambient temperature is maintained.
2-4. Position
This instrument is built as a bench-type instrument with rubber feet and tilt stand in
place. Stand-up angle can be adjusted by rotating angle of carrying handle.
2-5. Warming-Up
Allow more than 20 minutes for the unit to warm up so that it is stabilized and
ready for use.
3. OPERATION
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3-1. Controls, indicators and connectors
3-1-1. FC-8150U, FC-8030U Universal Counter
☺
☺ ☺
☺
1219 1618 15 10 9 20
3124 11658
7
17 13 14
FIG(2) FRONT PANEL
GATE INDICATOR : The gate light, when lit, indicates the main gate is open
and measurement in progress.
RS-232C INDICATOR: TX(transmitting), RX(receiving) blinking(OPTION)
OVER FLOW INDICATOR : OF is displayed when overflow.
DISPLAY : 9 digit(O.56") green LED display used for all read
readings.
NOTE: LAST MEASUREMENT DISPLAY WILL REMAIN FOR 10 SECONDS
AFTER SIGNAL OFF.
UNIT INDICATOR : When lit, indicates that the frequency displayed is in
KHz or MHz, and period is in n, u or mSec.
HOLD INDICATOR : When lit, engaged the hold function.
TRIG. LEVEL VR : Adjusts trigger threshold level on the input A input signal.
Pushing the knob in (preset) sets this level at the mid-
point of a symmetrical sinewave input. Pulling the knob
out and rotating it varies the level from negative to
positive around the mid point.
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INPUT C, BNC : Input for frequency measurements above 80MHz
Female BNC connector terminated in 50Ω.
LOW PASS FILTER : With this switch pushed in, the input B is routed through
a SWITCH(LPF) low-pass filter with-3dB point of
approximately 100KHz. When it is released, the input B
signal is applied to the counter. Same as input B
function for input A.
ATT. SWITCH : When this switch is set to x 10 (pushed in) the input B
is attenuated 10 :1 before application to the counter with
the switch set to x 1 (pushed out), the input B signal is
applied. The attenuator has no effect on the input C.
INPUT B, BNC : Input for frequency measurements below 100MHz
Female BNC connector terminated in 1 M Ωinput
resistance, shunted by < 40pF capacitance.
COUPLE. SWITCH : The switch is used to select the input-coupling mode AC
or DC.
COM/SEP. :COM. or SEPARATION for INPUT A,B
INPUT A, BNC :Input for frequency measurements below 100MHz.
Female BNC connector terminated in 1 MΩinput
resistance, Shunted by < 40pF capacitance.
GATE TIME SWITCH : This switch select the degree of resolution of the display
in all modes except TOTAL.
HOLD SWITCH : In hold function the display held but the counters
continue to increment. When the hold is released, the
display is updated and resumes counting.
SLOPE SWITCH : Selects positive going or negative going edge of input A,
B signal for triggering. When pushed in, negative going
edge is selected; when pushed out, positive going edge
is selected.
FUNCTION SWITCH : Select the desired operating mode.
a. FREQ. A. When this mode is selected, the counter
reads the frequency of the input A.
ResolutionisselectedusingtheGATETIME.
b. FREQ. B. When this mode is selected, the counter
reads the frequency of the input B. Resolution is
selected using the GATE TIME.
c. FREQ. C: When this mode is selected, the counter
reads the frequency of the input C. All readings are in
MHz.
d. PERIOD A. When this mode is selected, the counter
read the period of the input A Resolution is selected
using the GATE TIME.
e. TOTAL A. When this mode is selected, the unit counts
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cycles of the input A signal and continuously displays
that count.
f.T.l(A→B). When this mode is selected, the unit
measures the time interval from an edge of the input A
signal to an edge of the input B signal. Positive going or
Negative going edge of each signal is selected By the
slope switches.
g. RATIO (A/B). When this mode is selected, the unit
measures the ratio of input A frequency to the input B
frequency.
POWER SWITCH : Push in the unit ON and push out the unit power OFF.
TILT STAND : Pull out to adjust Tilt.
41
5
23
6
FIG(3)REARPANEL
AC INLET :For connecting of the supplied ac power
INT/EXT TIME BASE SELECTOR: Select the time base, switch position EXT.
STD.IN provides a nominal 50Ωinput impedance path
for an external 10 MHz time base. switch position
INT. STD. OUT monitors the internal time base
signal.
GROUNDTERMINAL
FUSE HOLDER :Replacing fuse with unscrewing
INT/EXT TIME BASE BNC: Serves as a monitoring point for the internal time
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base signal, or provides an input path for an external
time base signal depending on the INT/EXT switch setting.
The external signal should have a voltage range of
1.5V~5 Vrms.
RS-23
2CCONNECTOR :
Connector for serial interfacing with computer.
3-1-2. FC-8150, FC-8030 , FC-8300 Frequency Counter
19 18 1516 1012 9
2314 56148
20
FIG.(4) FRONT PANEL
GATE INDICATOR : The gate light, when lit, indicates the main gate is open
and measurement in progress.
RS-232C INDICATOR : TX(transmitting), RX(receiving) blinking(OPTION)
OVER FLOW INDICATOR : OF is displayed when overflow.
DISPLAY : 9 digit(O.56 “) green LED display used for all read-
readings.
NOTE: LAST MEASUREMENT DISPLAY WILL REMAIN FOR 10 SECONDS
AFTER SIGNAL OFF.
UNIT INDICATOR : When lit, indicates that the frequency displayed is in
MHz ,KHz, Hz and period is in. n. u. Sec.
HOLD INDICATOR : When lit, engaged the hold function.
INPUT C, BNC : Input for all frequency measurements above 80 MHz
Female BNC connector terminated in 50Ω.
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LOW PASS FILTER : With this switch pushed in, the input A is routed through
a low-pass filter with a -3 dB point of approximately 100
KHz. When it is released, the input A signal is applied to
the counter.
ATT. SWITCH : When this switch is set to x 10(pushed in) the input A is
attenuated 10:1 before application to the counter with
the switch set to x 1(pushed out), the input A signal is
applied unattenuated. The attenuator has no effect on
the input C.
COUPLE. SWITCH : The switch is used to select the input coupling, mode
AC or DC.
INPUT A, BNC : Input for frequency measurements below 100 MHz
and all PERIOD, measurement. Female BNC connector
terminated in 1 MΩ. input resistance, shunted by < 40
pF capacitance.
GATE TIME SWITCH : This switch select the degree of resolution of the display
in all modes except TOTAL.
HOLD SWITCH : In hold function, the display held but the counter
continue to increment. When the hold is released, the
display is updated and resumes counting.
FUNCTION SWITCH : Select the desired operating mode.
a. FREQ. A : When this mode is selected, the counter reads the
frequency of the Input A. Resolution is selected
using the GATE TIME.
b. FREQ. C : When this mode is selected, the counter reads the
frequency of the input C. All readings are in MHz.
c. PERIOD A : When this mode is selected, the counter read the period
of the input A. Resolution is selected using the
GATE TIME.
d. TOTAL A : When this mode is selected, the unit counts cycles of
the input A signal and continuously displays that count.
e. RPM A : When this mode is selected, the unit displays the
RPM(rotation per minute) of the input A signal.
POWER SWITCH : Push in the unit ON and push out the unit power OFF.
TILT STAND : Pull out to adjust Tilt.
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FIG(5) REAR PANEL
AC INLET :For connecting of the supplied ac power
INT/EXT TIME BASE SELECTOR: Select the time base, switch position EXT.
STD.IN provides a nominal 50Ωinput impedance path
for an external 10 MHz time base. switch position
INT. STD. OUT monitors the internal time base
signal.
GROUNDTERMINAL
FUSE HOLDER :Replacing fuse with unscrewing
INT/EXT TIME BASE BNC: Serves as a monitoring point for the internal time
base signal, or provides an input path for an external
time base signal depending on the INT/EXT switch setting.
The external signal should have a voltage range of
1.5V~5 Vrms.
RS-23
2CCONNECTOR :
Connector for serial interfacing with computer.
3-2. Operating Instruction
1
6523
4
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Below is the basic operating information needed for frequency counter.
a. Connect the unit to AC power cord into receptacle on rear panel and
plug into AC inlet.
b. To Turn on equipment, push power on-off switch on.
c. set the function indicator position to FREQ A and Gate time indicator to
1 Sec position.
CAUTION
1. APPLICATION OF INPUT VOLTAGES HIGHER THAN THE LIMITS LISTED IN
THE SPECIFICATIONS SECTION MAY DAMAGE THE COUNTER. BEFORE
APPLYING ANY SIGNAL TO THE INPUTS, MAKE CERTAIN THAT IT DOES NOT
EXCEED THESE SPECIFIED MAXIMUMS.
2. FREQUENCY COUNTER GROUND POINTS ARE CONNECTED DIRECTLY TO
EARTH GROUND. ALWAYS CONNECT FREQUENCY COUNTER GROUND
ONLY TO GROUND POINTS IN THE CIRCUIT UNDER TEST.
3-3. Frequency Measurements
3-3-1 INPUT A, B (0.1Hz ∼
∼∼
∼100MHz)
a. Apply the signal to be measured to the input A and/or B (8023, 8030U
only) BNC.
b. Set the FREQ. A and/or B (8023, 8030U only) of function switch.
c. Select the degree of resolution desired, using the gate time
selectorswitch.
d. Frequency is given by the display. The gate indicator lights while each
measurement in progress, and the display is updated at the end of each
measurement interval.
e. Engaging the hold switch “freezes” the display at the existing reading,
When hold is released, the display is updated and resumes counting.
f. If necessary, engage the attenuator switch When set to x 10 (pushed
in), this switch attenuates the input A and/or B(8023, 8030U only) signal
by a factor of approximately 10 before application to the counter. This
helps prevent miscounting caused by noisy or improperly terminated high
amplitude signals.
g. If necessary, engage the LPF (low pass filter) switch This route the input
A and/or B through a low pass filter (-3 dB point of approximately 100
KHz) before application to the frequency counter. This helps eliminate
counting errors in low frequency measurements by minimizing effects of
high frequency noise present on the input.
h. When measurement the lower cut-off frequency (10 Hz), pushed in DC
coupling position.
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3-3-2 INPUT C
FC-8150, FC-8150U: 80MHz to 1.5GHz
FC-8030, FC-8030U: 80MHz to 3.0GHz
FC-8300 : 80MHz to 3.7GHz
CAUTION
THE MAXIMUM INPUT LIMIT TO THIS INPUT IS 3 Vrms MAXIMUM OVER THE
INPUT FREQUENCY RANGE. THE X 10 ATTENUATOR DOES NOT APPLY.
a. Apply the signal to be measured to the input C. BNC.
b. Set the function indicator to the FREQ. C position.
c. Select the degree of resolution desired, using the gate time switch.
d. Frequency is given by the display. The indicator lights while each
measurement in progress.
e. Engaging the hold switch “freezes” the display at the existing reading,
When hold is released, the display is updated and resumes counting.
f. The attenuator and LPF coupling switch have no effect in input C.
3-4. Period Measurements
a. Apply the signal to be measured to the input A BNC.
b. Select the degree of resolution desired, using the gate time switch.
c.Period is given by the display. The gate indicator lights while each
measurement is in progress.
d. attenuator, low pass fitter, coupling switch application is same as
frequency measurements mode.
3-5. Total Measurements
The totalize mode is used to count the total number of events occurring
during a specific time period. Maximum frequency is 30 MHz.
a. Set the totalize mode. Any gate and units setting is ignored.
a. Apply the signal to be measured to input A , and then the counter display
is the count continually. Maximum count is 999999999. if this is exceed
the overflow message display as ”OF”
b. Low pass filter and attenuator, coupling switch application is same as
frequency measurements mode.
NOTE
THE HOLD SWITCH MAY BE USED TO BE LATCH THE DISPLAY. HOWEVER,
THE COUNTER TO INCREMENT AND WHEN THE HOLD IS RELEASED, THE
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UPDATE COUNT IS DISPLAY.
3-6. RPM (Rotation Per Minute) Measurement <FC-8150, FC-8030, FC-8300>
a. Apply the signal to be measured to the input A BNC, and then the
counter displays the RPM. Maximum count is 999999999. If this is
exceed, the overflow message displays as ”OF”
b. Low pass filter and attenuator, coupling switch application is same as
frequency measurements mode.
3-7. Time Interval Measurements(A→
→→
→B) < FC-8150U, FC-8030U >
In time interval mode, unit measures the elapsed time from a selected edge of the
input A waveform to a selected edge of the input B waveform. For a stable reading,
the two input signals should be related to each other such that this time interval
remains reasonably constant from one measurement to the next. For example, two
digital waveforms derived from the same clock would be suitable; two arbitrary
frequencies from separate function generators would not.
a. Connect the signal to be measured to the input A and input B.
b. Set the T.l(A→B) of function switch. The switch label serves as a
reminder that the measurement starts at the input A edge and stops at
the input B edge.
c. Select desired edge of each waveform using the input A, and input B
slope switches push switch in for negative-going edge, leave out for
positive-going edge.
d. Set a trigger level control to preset (Push In). This ensures that both
input A and input B are triggering at the same level (approximately the
average) on their respective waveforms.
e. Select the degree of resolution desired, using the gate time switch
f. Time interval is given by the display, the gate indicator lights while each
measurement is in progress, and the display is updated at the end of
each measurement interval.
g. Press the hold switch, “freezes” the display at the existing reading when
hold is released, a new measurement begins (Gate Indicator Lights),
but the display continues to hold the old reading until the new
measurement is completed.
3-8. Frequency Ratio Measurements (A/B) < FC-8150U, FC-8030U >
In this mode of operation, the counter displays the ratio of the frequency applied to
input A to the frequency applied to input B. The input A frequency should preferably
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20
be equal to or greater than that of input B. And both frequencies must be within the
limits given in the "SPECIFICATIONS" section. Frequency ratio is determined by
counting the number of input A cycles occurring during a specified number of input
B cycles (1.10.100.1000) and applying the result, with a proper decimal point, to the
display. a. Connect a signals to be measured to the input A and input B.
NOTE
BOTH INPUTS MAY BE CONNECTED TO THE SAME SIGNAL FOR A RATIO OF
1.000000 AT THE GATE TIME 1 SEC. THE UNIT INDICATORS ARE OFF
BECAUSE THE READING DISPLAYED IS RATIO.
b. Set the ratio A/B of function switch.
c. Select the resolution desired using the gate time switches.
d. Frequency ratio is given by the display the gate indicator lights while
each measurement is in progress, and the display is updated at the end
of each measurement interval.
e. Press the hold switch "freezes" the display at the existing reading. When
hold is released, a new measurement begins, but the display continues
to hold the old reading until the new measurement is completed.
3-9. Use of RS-232C Serial Interfacing
1) Hardware/Software Requirements
. IBM PC/XT/AT or compatible computer
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21
. Microsoft Windows 3.1, 95, 98
. Serial port for connection with counter
2) Output Data Formats
(1) Baud rate : 9600BPS
1start bit(0)
8data bit
1stop bit(1)
NONEPARITY
(2) To Frequency counter
Command Parameter Terminate Code
'H' : HOLD '0' : OFF
'1' : ON
'2' : TOGGLE
CR (0DH)
'G' : GATE '0' : 0.01 SEC
'1' : 0.1 SEC
'2' : 1 SEC
'3' : 10 SEC
CR (0DH)
'D' : DATA REQUEST DON'T CARE CR(0DH)
'F' : FUNCTION SET N* CR(0DH)
'R' : REMOTE '0' : OFF
'1' : ON CR(0DH)
N*= 0 1 2 3 4 5 6 7
1.5(3.0)GHz,U/C FA FB FC PERIOD TOTAL NC RATIO TI
150MHz,U/C FA FB NC PERIOD TOTAL NC RATIO TI
3.7GHz,F/C FA NC FC PERIOD TOTAL RPM NC NC
1.5(3.0)GHz,F/C FA NC FC PERIOD TOTAL RPM NC NC
150MHz,F/C FA FB NC PERIOD TOTAL RPM NC NC
(3) From Frequency counter
DATA UNIT
10BYTES include dp 4bytes CR
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