Atec Agilent-489A-491C-493A-495A Manuel d'utilisateur télécharger pdf

HP MODELS 489A, 491C, 493A & 495A

Microwave power amplifiers

1 to 12.4 GHz, 1 Watt

Microwave TWT Amplifiers

Amplification of frequencies from 1 to 12.4 GHz is accomplished in four ranges by the Hewlett-

Packard medium power microwave amplifiers. Each delivers at least 1 watt for a 1 milliwatt input

– a gain of at least 30dB.

All four TWT amplifiers have provisions for amplitude modulation, and since the internal

modulation amplifier is dc-coupled, remote programming and power leveling are possible.

Sensitivity is high for large output power changes from relatively small modulation signals,

obviating the need for an external modulation amplifier.

The dc amplifier has a gain of 20 dB and exhibits a passband from dc to 500 KHz when

modulation index in the neighborhood of 1 dB, as might be encountered in RF leveling. When

the modulating levels are high, in the region of 20 Volts, the passband will be a minimum of 100

KHz: a 20 volt change at the MOD INPUT produces a minimum of 20 dB off/on ratio.

489A – 495A Specifications

Output power: 1 watt for an input of 1 miliwatt

GAIN: 30 dB at rated output

Input/Output: Impedance 50 Ohms; Connectors: Type N female

Noise Figure: >30dB

Amplitude Modulation:

Sensitivity: modulation input of > -20V peak reduces FR output by > 20dB from dc

to 50 ohms.

Freq. Response: dc to 500 KHz (3dB).

Size: 5.5”x 16.75”x18.375”

Weight: 33 Lbs.

489A 491C 493A 495A

Frequency

Range (GHz)

1-2

2-4

4-8

7-12.4

Gain variation

with freq.

At rated output

Small signal

Across any

10% of band

across full

band

< 6 dB

< 5 dB

< 12 dB

< 6 dB

< 5 dB

< 12 dB

< 6 dB

< 5 dB

< 12 dB

< 6 dB

< 5 dB

for 300 MHz

< 10 dB

Résumé du contenu

Page 1 - 1 to 12.4 GHz, 1 Watt

HP MODELS 489A, 491C, 493A & 495A Microwave power amplifiers 1 to 12.4 GHz, 1 Watt Microwave TWT Amplifiers Amplification of frequencies from 1

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Atec Agilent-489A-491C-493A-495A Manuel d'utilisateur

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