File:Frequency meter Rochar A1439 Synthetiser HP 3325.jpg
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Summary
[edit]DescriptionFrequency meter Rochar A1439 Synthetiser HP 3325.jpg |
English: Rochar A1439 frequency meter, chronometer, period meter using Nixie display tubes with 10 s acquisition time setting to have a resolution of 0.1 Hz.
The thermostated time base is at 5 MHz. We have test clock outputs on the front panel between 1 Hz and 10 MHz because the counting reliability was low. The design is from 1965 and with discrete components. HP 3325 synthesizer with 1 mHz resolution and using high integration components design circa 1985.Use of 7-segment red LED displays Use in a laboratory of the former CIT company: Compagnie Industrielle des Télécommunications (CGE Group) Department of transmissions.Français : Fréquencemètre, chronomètre, périodemètre Rochar A1439 utilisant des tubes afficheurs Nixie avec réglage de temps d'acquisition 10 s pour avoir une résolution de 0.1 Hz.
La base de temps thermostatée est à 5 MHz. On a des sorties d'horloge de test en face avant entre 1 Hz et 10 MHz car la fiabilité du comptage était faible. La conception est de 1965 et avec des composants discrets. Synthétiseur HP 3325 avec résolution de 1 mHz et utilisant des composants à haute intégration conception vers 1985. Utilisation d'afficheurs led rouges 7 segments Utilisation dans un laboratoire de l'ancienne entreprise CIT : Compagnie Industrielle des Télécommunications (Groupe CGE) Département des transmissions. |
Date | |
Source | Own work |
Author | Fil22plm |
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current | 23:07, 6 November 2022 | 1,926 × 1,210 (903 KB) | Fil22plm (talk | contribs) | Uploaded own work with UploadWizard |
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Metadata
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot A70 |
Exposure time | 1/8 sec (0.125) |
F-number | f/2.8 |
Date and time of data generation | 22:11, 25 June 2005 |
Lens focal length | 5.40625 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
File change date and time | 22:11, 25 June 2005 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 22:11, 25 June 2005 |
Meaning of each component |
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Image compression mode | 5 |
APEX shutter speed | 3 |
APEX aperture | 2.96875 |
APEX exposure bias | 0 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 9,846.1538461538 |
Focal plane Y resolution | 9,846.1538461538 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |