Time Interval and Frequency Counter

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ivTable of ContentsSR620 Universal Time Interval Counter
Safety and Preparation for UsevSafety and Preparation for UseWARNING: Dangerous voltages, capable of causing death, are present in this instrument.Use extreme caution whenever the instrument covers are removed.This instrument may be damaged if operatedwith the LINE VOLTAGE SELECTOR set for thewrong ac line voltage or if the wrong fuse isinstalled.LINE VOLTAGE SELECTIONThe SR620 operates from a 100V, 120V, 220V, or240V nominal ac power source having a linefrequency of 50 or 60 Hz. Before connecting thepower cord to a power source, verify that the LINEVOLTAGE SELECTOR card, located in the rearpanel fuse holder, is set so that the correct acinput voltage value is visible.Conversion to other ac input voltages requires achange in the fuse holder voltage card positionand fuse value. Disconnect the power cord, openthe fuse holder cover door and rotate the fuse-pulllever to remove the fuse. Remove the smallprinted circuit board and select the operatingvoltage by orienting the printed circuit board toposition the desired voltage to be visible whenpushed firmly into its slot. Rotate the fuse-pulllever back into its normal position and insert thecorrect fuse into the fuse holder.LINE FUSEVerify that the correct line fuse is installed beforeconnecting the line cord. For 100V/120V, use a 1Amp fuse and for 220V/240V, use a 1/2 Amp fuse.LINE CORDThe SR620 has a detachable, three-wire powercord for connection to the power source and to aprotective ground. The exposed metal parts of theinstrument are connected to the outlet ground toprotect against electrical shock. Always use anoutlet which has a properly connected protectiveground.CONNECTION TO OTHER INSTRUMENTSAll front panel BNC shields are connected to thechassis ground and to the power outlet ground viathe power cord. Do not apply any voltage to eitherthe shields or to the outputs. The outputs are notprotected against connection to any potential otherthan ground.SR620 Universal Time Interval Counter
Page 1 and 2: MODEL SR620Universal Time Interval
Page 3 and 4: Table of ContentsiTable of Contents
Page 5: Table of ContentsiiiTimebase 79Fron
Page 9 and 10: SpecificationsviiSpecificationsFunc
Page 11 and 12: SpecificationsixGraphicsScopeDispla
Page 13 and 14: Abridged Command ListxiAbridged Com
Page 15 and 16: Abridged Command ListxiiiGENA(?) jG
Page 17 and 18: Quick Start Instructions 1Quick Sta
Page 19 and 20: Front Panel Operation 3FRONT PANEL
Page 21 and 22: Front Panel Operation 5CHOOSING THE
Page 23 and 24: Front Panel Operation 7HARDCOPY OUT
Page 25 and 26: Front Panel Operation 9SETTING THE
Page 27 and 28: Sample Arming 11SAMPLE ARMINGThe SR
Page 29 and 30: Sample Arming 13Time interval sampl
Page 31 and 32: Sample Arming 15the period of the A
Page 33 and 34: Configuration Menus 17CONFIGURATION
Page 35 and 36: Configuration Menus 19the PRINT key
Page 37 and 38: Configuration Menus 21Scan Configur
Page 39 and 40: Specification Guide 23SR620 SPECIFI
Page 41 and 42: Specification Guide 25accuracy of t
Page 43 and 44: Specification Guide 27FREQUENCY MOD
Page 45 and 46: Programming Commands 29PROGRAMMING
Page 47 and 48: Programming Commands 31MTRG jThe MT
Page 49 and 50: Programming Commands 33returned is
Page 51 and 52: Programming Commands 35SCEN (?) jTh
Page 53 and 54: Programming Commands 37DISP (?) jTh
Page 55 and 56: Programming Commands 39LOCL jThe LO
Page 57 and 58:
Programming Commands 41byte enable
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Programming Examples 43PROGRAMMING
Page 61 and 62:
Programming Examples 45Program Exam
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Programming Examples 47490 CALL ENT
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Programming Examples 49call DMA2 (s
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Programming Examples 51tstring(22:2
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Programming Examples 53if ( !strlen
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Programming Examples 55/* *********
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Troubleshooting Tips 57TROUBLESHOOT
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Troubleshooting Tips 59Be certain t
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Performance Test 61PERFORMANCE TEST
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Performance Test 63PERFORMANCE TEST
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Performance Test 655) Set D/A outpu
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Performance Test 67SR620 PERFORMANC
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Calibration Procedure 69CALIBRATION
Page 87 and 88:
Calibration Procedure 714) Set the
Page 89 and 90:
Calibration Procedure 731) Attach t
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Circuit Description 75SR620 CIRCUIT
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Circuit Description 77high bit from
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Circuit Description 79front panel E
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Circuit Description 81Gate_Ctrl set
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Circuit Description 83There are thr
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Circuit Description 85temperature c
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Parts List 87SR620 Parts ListFront
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Parts List 89REF. SRS PART VALUE DE
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Parts List 101REF. SRS PART VALUE D
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