Kenwood FC-758 User Manual Download

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© PRINTED IN JAPAN B50-7728-00(N)

26408

INSTRUCTION MANUAL

KENWOOD CORPORATION

FREQUENCY COUNTER
FC-758

KENWOOD

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Summary of Contents for FC-758

Page 1: ... PRINTED IN JAPAN B50 7728 00 N 26408 INSTRUCTION MANUAL KENWOOD CORPORATION FREQUENCY COUNTER FC 758 KENWOOD ...

Page 2: ... C A U T I O N S F O R USE 7 4 P A N E L E X P L A N A T I O N 8 4 1 F R O N T P A N E L 8 4 2 R E A R P A N E L 13 4 3 C A S E S U R F A C E 16 5 O P E R A T I N G P R O C E D U R E S 17 6 M E A S U R I N G C O N S I D E R A T I O N S 26 7 M A I N T E N A N C E 28 2 ...

Page 3: ...uring function unit microseconds and an easily controlled event total count function are supported Note that this event total count can be controlled externally with rear panel gate signal or through front panel operations The FC 758 is provided with a self check function The function enables the user to check and confirm major measurement functions The panel display portion has several easy to us...

Page 4: ...nt Resolution Prescale 10Hz to 10kHz Counting Time Gate Time 0 027s 0 27s 2 7s 27s Unit MHz Period Measurement A Measurement Range 0 285 s to 200 m s 5 H z to 3 5 M H z Accuracy 1 count Reference Time Accuracy Trigger E r r o r Resolution 100ps to 100 ns Unit MS Minimum Pulse Width 142 5 ns Magnification Gate Time X1 X10 x100 X1000 Totalize Measurement A Measurement Range 5Hz to 10MHz Maximum Tota...

Page 5: ...Vr m s 1 0GHz to 1 3GHz Impedance 5 0 a Maximum Input Voltage 1 5Vr m s Reference Oscillator Oscillation Frequency Crystal Oscillation 10 0MHz Channel A 5Hz to 100MHz Crystal Oscillation 3 90625MHz Channel B 80MHz to 1 3GHz Stabilization Tenperature Factor Aging Rate 3x10 6 0 to 40 C 10 0 MHz 1 X 1 0 6 0 to 40 C 3 90625MHz 5 x 1 0 7 Month 10 0MHz 2 X 1 0 7 Month 3 90625MHz D i s p l a y Function D...

Page 6: ...erature and Humidity 23 C 5 C 70 R H Operating Temperature and Humidety 0 C to 40 C 80 RH Dimentions 240 W x64 H xl90 D mm Max 260 W x70 H x210 D mm Weight 1 8kg Accessories Instruction Manual 1 Power Supply Cable 1 Replacement Fuse 1 Trigger error is typ cal y 0 3 of reading divided by the number of cycles averaged for input signals having better than 40dB S N ratio and greater than lOOmV amplitu...

Page 7: ...c The maximum input terminal voltage levels of this counter are as follows Front Panel Channel A Input Juck 125Vrms at 400Hz Channel B Input Juck 1Vrms at 80MHz to 1 36Hz Rear Panel T O T A L I Z E INPUT S T A R T S T O P Input Juck 5 V d This counter can start its operation at the moment when power is applied However wait 30 minutes to give it a warm and then start your job with it Accurate measu...

Page 8: ... remind the user of the current measurement data unit This L E D turns on when the frequency measurement value is displaed in Megaherz Display L E D The display consists of eight digit L E D s indicating all the measurement values O V E R F L O W Indicator L E D The O V E R F L O W L E D is provided to notify the user that an overflow has occurred This L E D blinks when any measurement data exceed...

Page 9: ...Figure 1 Front Panel 3 ...

Page 10: ...the counter If this switch is pressed again x 1 the input signal to channel A reaches the counter without attenuation Note that this switch can work together with channel A only but does not affect channel B L P F Switch The L P F switch is used to enable the Low Pass Filter circuit operation If this switch is p r e s s e d J U L the input signal to channel A is forced to enter a low pass filter o...

Page 11: ...vided to select the desired operational mode from the available modes The Mode Indication L E D is provided to enable the user to see the measurement mode currently in use The following operational modes can be selected with this switch a k H z 1 0 M H z frequency measurement mode The kHz 10MHz measurement mode is an operational mode in which this frequency counter measures the frequency of an inp...

Page 12: ...mode The T O T A L 1 0 MHz mode is an operational mode in which this product counts the number of channel A input cycles and then outputs each count value to the display continuously This cycle count and display operations can be externally controlled with the gate signal input to the T O T A L I Z E INPUT S T A R T S T O P input juck on the rear panel or the H O L D switch on the front panel f C ...

Page 13: ...value 0 01s 0 1s 1 0s 10s Magnification x l xlO X100 X1000 4 2 Rear Panel See Figure 2 T O T A L I Z E INPUT S T A R T S T O P Input juck The T O T A L I Z E I N P U T S T A R T S T O P input juck is provided to control the event input count operation mode The event input count operation is enabled if the input signal to this juck becomes active T T L level H The event input count operation is for...

Page 14: ...Figure 2 Rear Panel 14 ...

Page 15: ... input connector The power input connector is provided for connecting a power cord to the counter Use the accessory power cord Fuse Holder The fuse holder is provided to enable the user to set a protection fuse in the counter For the 1 0 0 V or 120V power requirement use the 0 25A 250V slow blow type fuse For the 220V or 240V power requirement use the 0 125A 250V slow blow type fuse When you repla...

Page 16: ...ne adjust the T C X O standard oscillator This adjustment applies to both of the CH A 10 0MHz and CH B 3 90625MHz channels The opening is normally covered with a rubber cap If the oscillator needs to be fine adjusted please contact your dealer representative Figure 3 Case Surface 16 ...

Page 17: ...l be turned on Note The maximum allowable measurement frequency varies depending on the measurement modes In the kHz measurement mode up to 10MHz frequency can be processed while the maximum frequency that can be handled in the MHz mode is 1 3GHz 3 Select a desired display resolution value with G A T E switch 4 The frequency of the input signal currently being measured will be output to Display G ...

Page 18: ...ed during frequency measurement the measurement value on the Display will be reset to 0 If pressed again a new measurement cycle will be started However the measurement value will remain 0 until the new cycle is complete 5 1 2 Frequency Measurement with C H A N N E L B 80MHz to 1 3GHz 1 Input a target signal to be measured to C H A N N E L B prescale input juck Note The maximum input voltage to th...

Page 19: ... is measured The cycle time finally output by the counter is the average of all the cycles measured The number of cycles to be measured can be 1 10 100 or 1000 The maximum input frequency is 3 5MHz 1 Input a target signal to be measured to the C H A N N E L A input juck 2 Select the PER 0 3us period mode with F U N C switch The k H z s L E D will turn on indicating that the measurement value is di...

Page 20: ...esult accurate low frequency measurement is assured 7 If H O L D switch is pressed during period measurement the current measurement value on the Display is held as it is If pressed again a new measurement cycle will be started However the measurement value currently being displayed will remain unchanged until the new measurement cycle is complete That is the display value being held by the H O L ...

Page 21: ...ith T O T A L I Z E INPUT S T A R T S T O P juck left O P E N the counter operation will be started at the moment If the T O T A L I Z E INPUT S T A R T S T O P juck is used to control the event measurement the counter operation after the R E S E T switch release will be dependent on the terminal T T L level It will be started immediately if the terminal level is H Otherwise it will not be started...

Page 22: ...ounter This attenuates noise superimposed input signals in addition the attenuation circuit preprocesses a signal with rather a high amplitude into a reasonal level As a result accurate counting is assured 7 Press L P F Sow pass filter switch e e l to eliminate noise signal components If the internal L P F circuit function is enabled the input signal to the CHANNEL A juck is handled first by the L...

Page 23: ...Hz The measurement value on the display will be change to the one as shown in Figure 4 c This means that the display resolution value has changed to 100Hz 0 001 M H z Figure 4 d shows the typical display example in the event total measurement mode The total measurement value does not require any display unit A s a result it is displayed in integer no display data following the decimal point Note t...

Page 24: ...easured the cycle measurement mode should be used instead of the frequency measurement mode because higher precision data can be displayed If relatively high frequency signal is measured the frequency measurement mode should be used instead of the period measurement mode because higher precision measurement data can be output Either measurement mode should be employed with a frequency of 10kHz in ...

Page 25: ...scillator which requires quick update The update interval will be long if a high resolution value is selected 2 Period measurement mode The period measurement mode processes the speci fied number of cycles and then outputs the aver age cycle time The desired number of cycles can be specified by using the G A T E switch The relationship between the number of cycles and the G A T E switch is shown t...

Page 26: ...he attenuation circuit will function as the 180 000 1 if used together with the prescale input juck Please keep it in mind 6 2 Change in measurement mode and resolution A new measurement operation is started each time when a measurement mode or resolution value is changed The measurement display data on Display I is not updated until the new measurement cycle is completed Even if decimal point pla...

Page 27: ...e G A T E L E D remains inactive while the H O L D switch is being held down The G A T E L E D will resume blinking at the moment when the H O L D switch is released If a resolution value is changed display data will be updated when the first G A T E interval period is over 3 Press R E S E T switch and the current display value will be cleared The G A T E L E D remains inactive while the R E S E T...

Page 28: ...ct is 100V If a different level power supply voltage needs to be applied to the product use the power supply voltage selector labeled as L I N E V O L T A G E S E L E C T according to the voltage select information on its left Bear in mind that voltage change results requires a new fuse rating Case 1 Voltage change from 100V 200V to 220V 240 V Fuse rating 0 25A 250V to 0 125A 250V Case 2 Voltage c...

Page 29: ...A p r o d u c t of KENWOOD CORPORATION 2 5 1 chome Shibuya Shibuya ku Tokyo 1 50 Japan ...

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