Keithley 776 Compteur
Fabricant:
Modèle:
776
Date:
2001
Catégorie:
Groupe:
Description:
Programmable Counter/Timer

Information

model 776 is a ten digit microprocessor based fully-programmable. three-channel Universal Counter / Timer. The instrument measures with a very high resolution and precision the following parameters: Frequency A. Frequency B. Frequency C. Period A. Pulse-width. Time interval A to B. Total counts B. Ratio A/B. Ratio C/B. Phase A to B and Amplitude peaks. An averaging function is available for improved resolution in time measurement: resolves intervals of pico seconds. Various repetitive tests, no matter how complex, are greatly simplified by utilizing any of the 10 pre-programmed front panel set-up. Set-ups are stored in a non-volatile memory' and can be recalled by a simple key stroke. model 776 utilizes a combination of two measurement techniques in order to always achieve maximum display resolution. Some functions, such as Frequency measurement function, can be displayed with up to ten digits. Such resolution can be gained from frequencies as low as 0.01 Hz to more than 225 MHz. The reciprocal technique is being used in low frequency measurements, up to exactly 120 MHz, where the measurement technique is changed to conventional measurement technique. model 776 measures frequencies of input signals with minimum resolution of nine digits in one second of gate time. With the TCXO time base of the Model 776/2.4G. the displayed result in largely enhanced, both in terms of stability and accuracy. In model 776. the traditionally featured decade steps of gale times, are replaced by a more flexible variable gate time. This feature permits a choice from 500 internally pre-selected gale intervals, or am external gate interval which is applied to a rear panel BNC connector. Internal gate times range from 100 µs to 10 s. External gate expands this range to 1000 s. Trigger level may be selected manually or left to be automatically adjusted, by the instrument, to the optimum level, thus eliminating false triggering on unknown signals.

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Service et Manuel de l'utilisateur
Type manuel:
Service et Manuel de l'utilisateur
Pages:
141
Taille:
6.29 Mbytes (6598466 Bytes)
Langue:
english
Révision:
E
Manuel-ID:
776-901-01
Date:
01 avril 2001
Qualité:
Document scanné, tous les lisible.
Date de transfert:
25 août 2018
MD5:
00be957b48053e75ba89d11f767e95dd
Téléchargements:
567

Information

This manual provides operating and maintenance information for the model 776 Programmable Counter/Timer. Section 1 is a general description of the instrument. Section 2 and 3 obtain installation and operating instructions. IEEE programming is explained in Section 4. Maintenance and performance checks are provided in Section 5. The theory of operation is described in Section 6. Section 7 outlines calibration and troubleshooting procedures. Section 8 contains tables of replaceable parts. Section 9 contains schematic and component location diagrams.

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