Manual - Test Equipment Depot
Contents
1. 6 1 3 Equipment Ratings 9 1 4 Supplied Accessories 10 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 18 3 4 Period Measurements 19 3 5 Total Measurements 19 3 6 RPM measurement 19 3 7 Time interval measurement A B 19 3 8 Ratio Measurement 20 4 MAINTENANCE 4 1 Fuse Replacement 21 4 2 Adjustment and Calibration 21 4 3 Cleaning and decontamination 21 5 OTHERS 5 1 BNC Cable Considerations 22 5 2 Use of Attenuat2. Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 22 5 3 Line Frequency Measurements Use of the attenuator low pass filter and or x10 probe is advisable when measuring line frequency because the high amplitude signal and noise can cause wrong counting WARNING USE CAUTION IN MEASURING THE LINE FREQUENCY OF AN AC OUTLET USING THE PROBE TIP ONLY MEASURE BOTH SIDES OF THE LINE THE GROUND SIDE WILL GIVE A ZERO READING AND THE HOT SIDE WILL PROVIDE THE DESIRED MEASUREMENT DO NOT USE THE GROUND LEAD OF THE PROBE REMEMBER THAT THE CHASSIS OF THE COUNTER AND THE GROUND LEAD OF THE PROBE ARE ALREADY AT EARTH GROUND VIA THE 3 WIRE POWER CORD OF THE INSTRUMENT TOUCHING THE GROUND LEAD TO THE HOT SIDE OF THE LINE WOULD PLACE A DIRECT SHORT ON THE POWER LINE THROUGH THE PROBE CABLE RESULTING IN POSSIBLE INJURY AND DAMAGE TO THE PROBE CABLE Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 23
3. 7015 Frequency Counter 3 EZ rc 7150 5GHz FREQUENCY COUNTER ay TX OH gt oil o o NPUT C soa SH gov go LL Ka BEd 1 5GHz o lt FUNCTION GATE TIME T F ado dm 1 0 ON 4 MULTIPLIER iiti a eS EZ FC 3000 3GHz FREQUENCY COUNTER LAE Us gt Mn He INPUT RX sec J MAX 509 Ww RMT G T m H 80MHz 3GHz A 0015 0 15 15 105 Urrea PRIOD TOTAL RPM INPUT A m POWER aN oF FUNCTION GATE TIME INPUT A imei oe COUPLE ATT LPF 250V MAXIMO lt HOLD MULTIPLIER BAC in OFF ANC TQTAL RESET abc 170 20 19 5 18 1t 12 13 17 FIG 5 FC 3000 FRONT PANEL Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 14 D GATE INDICATOR _ The gate light when lit indicates the main gate is open and measurement in progress 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 G 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 HOLD SWITCH In hold function the display held but
4. TX transmitting RX receiving blinking OPTION 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 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 11 INPUT A BNC Input for frequency measurements below 100MHz Female BNC connector terminated in 1 MQ input resistance Shunted by 40pF capacitance 9 INPUT C BNC Input for frequency measurements above 80MHz female FC 7150U Only BNC connector terminated 500 INPUT B BNC Input for frequency measurements below 100MHz Female BNC connector terminated in 1 M Q input resistance shunted by 40pF capacitance D COUPLE SWITCH The switch is used to select the input coupling mode AC or DC 2 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 3 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 inpu
5. the counters continue to increment When the hold is released the display is updated and resumes counting RS 232C INDICATOR TX transmitting RX receiving blinking OPTION INPUT A BNC Input for frequency measurements below 100MHz Female BNC connector terminated in 1 MQ input resistance Shunted by 40pF capacitance 9 INPUT C BNC Input for frequency measurements above 80MHz female BNC connector terminated in 500 17 COUPLE SWITCH The switch is used to select the input coupling mode AC or DC 2 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 3 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 ID OVER FLOW INDICATOR OF is displayed when overflow TILT STAND Pull out to adjust Tilt GATE TIME SWITCH This switch select the degree of resolution of the display in all modes except TOTAL FUNCTION SWITCH Select the desired operating mode a FREQ A When this mode is selected the counter reads the frequencyof the input A Resolution is selected using the GATE TIME b FREQ C FC 3000 7150 When this mode is select
6. the source impedance For example for a source impedance of 500 use 500 coaxial cable terminated with 500 resistive load Use DC blocking capacitor in situations where bias voltage or other DC voltages could be affected by the termination resistor Shunt cable capacitance which can cause undesirable signal attenuation increases with increased cable length It is recommended that for radio frequency measurements the cable be no longer than three feet 9O cm to keep shunt capacitance within acceptable limit In 50Q systems the internal 50Q input termination of the input B BNC minimizes reflections and the resulting standing waves Thus the need for an external termination is eliminated Also shunt capacitance has a much lesser effect at this BNC then at the input A and the above restriction on cable length is reduced However prescale measurements must always be taken from a 50 point in the circuit under test 5 2 Use of Attenuator Probes Input A resistance 1 M and input capacitance lt 40 pF are independent of the ATT switch To decrease loading a high impedance oscilloscope probe such as the following may be used with input A Use the probe in the x 10 position whenever possible for less circuit loading NOTE DO NOT USE A 10 1 PROBE WITH THE INPUT C THE PROBE IS DESIGNED FOR 10 1 ATTENUATOR WITH A COUNTER INPUT RESISTANCE OF 1 MQ THE 50 Q TERMINATION OF THE INPUT C WOULD RESULT IN UNACCEPTABLY HIGH ATTENUATION
7. CEMENT 4 2 Adjustment And Calibration It is recommendable to regularly adjust and calibrate this instrument Qualified and authorized personnel only should execute performance and procedures 4 3 Cleaning and decontamination The instrument can be cleaned with a soft clean cloth to remove any oil grease or grime Never use liquid solvents or detergents If the instrument gets wet for any reason dry the instrument using low pressure clean air at less than 25 PSI Use care and caution around the window cover areas where water or air could enter into the instrument while drying Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 21 5 OTHERS 5 1 BNC Cable Considerations Accuracy of radio frequency measurements can be affected by connections between signal source and counter Main considerations are standing waves and shunt cable capacitance Standing wave is usually present due to reflections when a transmission line is not terminated in its characteristic impedance These standing waves may cause damage to the signal source or produce inaccurate measurements and their effects increase as cable length reaches one fourth of the wavelength for the frequency being measure Standing wave can be minimized by keeping cable lengths short and more important providing a proper termination The cable s characteristic impedance and the terminating impedance should match
8. FC 3000 7150 7015 7150U 7015U Frequency Universal Counter Operation Manual m Q EZ Digital Co Ltd WARRANTY Warranty service covers a period of one year from the date of original purchase In case of technical failure within one year our service center or sales outlet free of charge will provide repair service We charge customers for repair after the one year warranty period has been expired Provided that against any failure resulted from the user s negligence natural disaster or accident we charge you for repairs regardless of the warranty period For more professional repair service be sure to contact our service center or sales outlet Introduction Thank you for purchasing a EZ product Electronic measuring instruments produced by EZ Digital 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 EZ Digital Co Ltd 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
9. HARACTERISTICS 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 lt 0 1S Somewhere between 9 and 90mS lt 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 B DIMENSION AND WEIGHT Dimensions 255 W x 90 H x 255 D mm Weight Approx 2 0 kg 1 3 Equipment Ratings Power amp Fuse Ratings Power Max Input Voltage Fuse FC 7150U FC 7015U FC 3000 FC 7150 FC 7015 103 126V AC 50 60Hz F 0 5A 250V 15W 10W 206 252V AC 50 60Hz F 0 25A 250V 15W 10W Operating Environment TEMPERATURE 0 C to 40 C Accuracy Specified at 25 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 Tes
10. NECTED 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 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 20 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 4 MAINTENANCE CAUTION IT IS ESSENTIAL FOR SAFETY TO PROPERLY MAINTAIN AND SERVICE THIS INSTRUMENT WARNING VOLTAGES WITHIN THIS INSTRUMENT ARE SUFFICIENTLY HIGH TO ENDANGER LIFE COVERS MUST NOT BE REMOVED EXCEPT BY PERSONS QUALIFIED AND AUTHORIZED TO DO SO AND THESE PERSONS SHOULD ALWAYS TAKE EXTREME CARE ONCE THE COVERS HAVE BEEN REMOVED 4 1 Fuse Replacement Disconnect and remove all connections from any live power source Unscrew fuse holder by screw driver Locate the defective fuse and remove it by gently pulling out Install a new fuse of the SAME SIZE AND RATING Screwing fuse holder CAUTION MAKE SURE THAT THE RATED AND SPECIFIED FUSES ARE USED FOR REPLA
11. OUNT of A B TRIG ERROR x FREQ Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 7 B INPUT C CHARACTERISTICS FC 7150U FC 7150 gt FREQUENCY RANGE 80 MHz to 1 5 GHz SENSITIVITY 80 MHz to 1 1 GHz 35 mV 1 1 GHz to 1 5 GHz 70 mV COUPLING AC only IMPEDANCE 50 5 MAX INPUT LEVEL 3 Vrms sine wave lt FC 3000 gt FREQUENCY RANGE 80 MHz to 3 3 GHz SENSITIVITY 80 MHz to 2 0 GHz 10 mV 2 0 GHz to 3 0 GHz 20 mV 3 0 GHz to 3 3 GHz 35mV COUPLING AC only IMPEDANCE 50 5 MAX INPUT LEVEL 3 Vrms sine wave RESOLUTION AND NUMBER OF DISPLAYED DIGIT Gate Time Number Of Displayed Digit 5 e 6 7 7 8 8 9 Table 2 B TIME BASE CHARACTERISTICS TYPE TCO Temperature controlled oscillator FREQUENCY 10 000000 MHz STABILITY 1 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 INT STD OUT 10 MHz internal standard frequency output LEVEL 1 Vpp or more IMPEDANCE Approx 6000 EXT STD IN 10 MHz external standard frequency input LEVEL 1 5 Vrms to 5Vrms IMPEDANCE Approx 6000 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 8 B DISPLAY C
12. 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 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 18 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 b 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 C Low pass filter and attenuator coupling switch application is same as f
13. ach 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 3 EXT STD IN INT STD OUT AC IN ruse ponenmex f 50Hz 60Hz ZN xw IW 2 SN FIG FC 7150U FC 7015U REAR PANEL 1 VOLTAGESELECTOR Select acpower 115V AC or 230V AC 2 AC INLET For connecting of the supplied ac power 3 INT EXT TIME BASE SELECTOR Select the time base switch position EXT STD IN provides a nominal 6000 input impedance path for an external 10 MHz time base switch position INT STD OUT monitors the internal time base signal 0 GROUND TERMINAL 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 232C CONNECTOR Connector for serial interfacing with computer Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 13 3 1 2 FC 3000 FC 7150 FC
14. ed 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 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 15 input A Resolution is selected using the GATE TIME e TOTAL A When this mode is selected the unit counts cycles of the input A signal and continuously displays that count f RPM A When this mode is selected the unit displays the RPM rotation per minute of the input A signal 0 POWER SWITCH Push in the unit ON and push out the unit power OFF 3 EXT STO IN INT STD OUT ERN e WAR G DO NOT R VER REFER SERVICING TO T Ae FUSE POWER MAX df uyv SAF 1w BN OF 10 Se a SN VOLTAGE 2 R Zw SELECTOR e I I e nsv I 230V Qs Made ir Korea 2 5 4 1 06 FIG 6 FC 7150FC 7015 REAR PANEL 230V SOHZ GOHz 4 INTSTDOUT EXT STDIN 2 5 FIG 7 FC 3000 REAR PANEL Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 16 1 VOLTAGESELECTOR Selectac power 115V AC or 230V AC 2 AC INLET For connecting of the supplied ac power 3 INT EXT TIME BASE SELECTOR Select the time base switch position EXT STD IN provides a nominal 6000 input impedance path for an external 10 MHz ti
15. me base switch position INT STD OUT monitors the internal time base signal E GROUND TERMINAL 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 exo D RS232C CONNECTOR Connector for serial interfacing with computer 3 2 Operating Introductions 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 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 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 17 3 3 Frequency Measurements 3 3 1 INPUT A B 0 1 Hz to 100 MHz a Apply the signal to be measured to the input A and o
16. n u m Sec with decimal point TOTAL RANGE DC to 30 MHz CAPACITY 0 to 999 999 999 OVER FLOW OF RPM RANGE 6 to 600 x 107 RPM OVER FLOW OF Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 6 lt FC 3000 FC 7150 FC 7015 only gt MAX INPUT VOLTAGE LEVEL og 28 o gt 5 gt 2 amp a Zx xd gt 02 FREQUENCY Hz FIG 1 MAX Input Level input A B W INPUT B CHARACTERISTICS lt FC 7150U FC 7015U gt 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 MO Resistance Shunted by 40pF ATTENUATOR x 1 or x 10 Switch Selectable LOW PASS FILTER adB Point of 100KHz Switch Selectable SLOPE Positive or Negative Switch Selectable Resolution and Number of displayed digit Table 1 Same as INPUT A Max INPUT VOLTAGE LEVEL FIG 1 Same as INPUT A B TIME INTERVAL A gt B FC 7150U FC 7015U gt RANGE 0 1 uSec 10Sec 0 1Hz 10MHz LSD 100nSec RESOLUTION LSD Trigger Error ACCURACY LSD Trigger Error Time base error x T I MULTIPLIER 1 10 100 1000 Gate Time 105 15 0 15 0 015 B RATIO A B FC 7150U FC 7015U gt RANGE 0 1Hz to 10MHz input A 0 1Hz to 10MHz input B RESOLUTION LSD x B Trlg ERROR x FREQ AJ N ACCURACY 1 C
17. of the product can be changed without prior notice 5 f you have further questions concerning use please contact the EZ Digital 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 e 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 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 3 CONTENT 1 PRODUCT DESCRIPTION 1 1 Introduction 5 1 2 Technical Specifications
18. oints 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 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 5 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 MQ Resistance Shunted by lt 40pF ATTENUATOR X 1 or x 10 Switch Selectable LOW PASS FILTER Point of 100KHz Switch Selectable TRIGGER LEVEL 350mV to 350mV PRESET OV FC 7150U FC 7015U only SLOPE Positive or Negative Slope Switch Selectable FC 7150U FC 7015U 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 Number Of Displayed Digt 5 6 uc Frequency Input A B RESOLUTION 1Hz99Hz o1 mhz 10 uHz 10Hz99Hz imHZ tmHz i mhz 1KHz99KHz fot He 10 mhz fio mhz 100 Hz ACCURACY Time base Error Resolution Table 1 PERIOD RANGE 10 n8 to 10 S DISPLAY
19. or probes 22 5 3 Line Frequency Measurements 23 1 PRODUCT DESCRIPTION Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 4 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 3 GHz FC 3000 3 3GHz FC 7150U FC 7150 1 5GHz FC 7015U FC 7015 100MHz based on 10MHz time base T C O temperature controlled oscillator and also featuring FC 7150U FC 7015U 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 3000 FC 7150 FC 7015 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 facts of operation Each operating mode can be selected by front panel push button switches with automatic decimal p
20. r B FC 7150U FC 7015U only BNC b Set the FREQ A and or B FC 7150U FC 7015U only of function switch c Select the degree of resolution desired using the gate time selector switch 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 FC 7150U FC 7015U 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 3 3 2 INPUT C FC 7150U FC 7150 80 MHz to 1 5 GHz FC 3000 80MHz to 3 3GHz CAUTION THE MAXIMUM INPUT LIMIT TO THIS INPUT IS 3 Vrms MAXIMUM OVER THE INPUT FREQUENCY RANGE THE X 10 ATTENUATOR DOES NOT APPLY
21. requency 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 UPDATE COUNT IS DISPLAY 3 6 RPM Rotation Per Minute Measurement FC 3000 FC 7150 FC 7015 gt 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 7150U FC 7015U gt 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 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 19 a Connect the signal to be measured to the input A and input B b Set the T I 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 wavefo
22. rm 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 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 7150U FC 7015U gt 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 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 CON
23. t A ID OVER FLOW INDICATOR OF is displayed when overflow 09 COM SEP COM or SEPARATION for INPUT A B 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 07 TILT STAND Pull out to adjust Tilt GATE TIME SWITCH This switch select the degree of resolution of the display in all modes except TOTAL 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 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 FC 7150U only When this mode is selected the counter reads the frequency of the input 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 cycles of the input A signal and continuously displays that count f T I AB 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 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 12 Negative going edge of e
24. t Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 9 1 4 Supplied Accessories Operation Manual 1 BNC cable 1 Power cord 1 Spare FuSe 1 Specifications are subject to change without notice 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 ac 230V 50 60 Hz power through 3 conductor ac power cable to be fit into three contact electrical outlet to secure grounding If forced to use 2 conductor cable use ground terminal in rear panel for grounding instrument 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 tempera
25. ture 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 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 10 3 OPERATION 3 1 Controls indicators and connectors 3 1 1 FC 7150U FC 7015U Universal Counter INPUT C 62 71 1 5GHz UNIVERSAL COUNTER BS 3 CS e FUNCTION SLOPE GATE TIME lt es se 8 20 10 11 42 19 15 19 16 FIG 2 FC 7150U FRONT PANEL D GATE INDICATOR The gate light when lit indicates the main gate is open and measurement in progress 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 3 UNIT INDICATOR When lit indicates that the frequency displayed is in KHz or MHz and period is in n u or mSec 0 HOLD INDICATOR When lit engaged the hold function 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 RS 232C INDICATOR
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