Datasheet > SSF-2

SSF-2

更新时间： 2024-09-24 06:14:19

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描述
SINGLE SIDEBAND MODULATOR

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中文翻译

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数据手册

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SSF-2 数据手册

SSF-2 Series

SINGLE SIDEBAND MODULATOR

10 to 4000 MHz / Image Rejection to 30 dB / Internal Second Quad / High Sideband Rejection

PRINCIPAL SPECIFICATIONS

GENERAL SPECIFICATIONS

Model

Number

LO Center

Frequency, f_o

Bandwidth,

MHz

Outline

Style

(when used as an Up Converter)

RF/IF Input Characteristics

SSF-2F-***/ 10 - 1000 MHz

10% of f_o

Impedance:

VSWR:

RF Power Level:

IF Power Level:

IF Bandwidth:

RF Bandwidth:

50 W nom.

1.5:1 max.

+10 dBm

0 dBm nom.

up to an octave

10%

SSF-2L****/ 1000 - 4000 MHz 10% of f_o

A complete Model Number will be assigned with center frequency (***=f_o)

and slash number, once a full specification is established with factory.

SIDEBAND REJECTION

Output Characteristics

Conversion Loss:

Sideband Suppression: 25 dB min.

for a given Amplitude and Phase Balance

9 dB max.

Operating Temperature:

-- 55 to +85°C

General Notes:

1. Single Sideband Modulators are integrated

networks composed of an in-phase power

divider, two double balanced mixers and two

90°quadrature hybrids. The primary function of

the circuit is to amplitude modulate a carrier such

that all the energy is in either the upper or lower

sideband.

Ampl.

Image

Balance

Rejection

Ratio

0 dB

0.25

2. These units are especially useful in modulator

applications where the desired and undesired RF

sidebands are so close in frequency that it is not

practical to use a bandpass filter to separate

them or where minimum group delay is required.

0.5

0.75

1.0

3. By vector subtraction, the undesired sideband

is canceled within the unit (internally terminated)

and the desired sideband is reinforced at the

output. The level of cancellation is usually

expressed as sideband rejection ratio in dB.

2.0 dB

4. The schematic diagram shows how the

desired receiver signals from the two mixers are

combined in-phase at the real (RF/LO) port,

while the undesired spurious signals cancel each

other out. At the image port the reverse occurs

and the unwanted sideband signal is absorbed

by the load resistor. (Continued, next page)

0.5

1.5

2.5

Phase Error (degrees)

26Mar96

ForfurtherinformationcontactMERRIMAC/41FairfieldPl.,WestCaldwell,NJ,07006/ 973-575-1300/FAX973-575-0531

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