Gain /Nf & insert losses meases on switched masthead preamps from 50 MHz up to 2.5 GHz
Release 2e The last but not the least ! F5DQK – february 2011
Switched masthead preamps – v2e
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Avant propos Ce Powerpoint illustre une étude sur une large variété de préamplis-mât commerciaux commutés, en écartant d’emblée tout préampli à usage EME: - utilisation uniquement en propagation troposphérique - uniquement à usage extérieur - utilisables en émission/réception (avec circuit de relayage) - équipés ou non d’un circuit VOX. - Gamme de fréquences : de 50 MHz, jusqu’au moins 2.3 GHz Ces mesures illustrent : - le couple gain/bruit - la perte d’insertion et l’adaptation lors du passage en émission
Plan 1- Banc de mesures RF 2- Préamplis monobande 3- Préamplis large bande 4- Conclusion
F5DQK – february 2011
Switched masthead preamps – v2e
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1- Banc de mesures
F5DQK – february 2011
Switched masthead preamps – v2e
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Mesures gain/bruit large Banc bande de mesures entre 10 MHz et 18 GHz HP 8350b sweep
HP 8971b NF test set LO in IF out RF in 10 MHz -18 GHz
HPIB cables
HP 8970b NF analyser F5DQK – february 2011
Switched masthead preamps – v2e
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Mesures scalaires large bande entre 10 MHz et 20 GHz
these, ir~luding one airborne experiment where a Loran-C receiver gave the ... Burwasser, Alex, "Broadbond JFET Ampli 'iers", Ham Radio, Vol. 12, No. 1 1, pp.
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Insert Pull-Out Strength ... proper bond strength of the insert to the plug wall. 1. ... Immediately push insert to the bottom of hole with dot facing up/out and ensure ...
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The function of Siemens TWT-Power Supplies is closed the same, the differences ... Detailed descriptions see functional description, block- and circuit diagram ...
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Changes supplement, contact your nearest Hewlett-. Packard office. 9. Description. 10. The HP 8484A Power Sensor is used for measuring the average power ...