151-62-3 datasheet, PDF - EEWORLD Datasheet

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151-62-3: DescriptionVariable Attenuator, 0MHz Min, 4000MHz Max, 1.1dB Insertion Loss-Max, ROHS COMPLIANT; CategoryWireless rf/communication Radio frequency and microwave; File Size297KB，5 Pages; ManufacturerCobham PLC; Environmental Compliance

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151-62-3 Overview

Variable Attenuator, 0MHz Min, 4000MHz Max, 1.1dB Insertion Loss-Max, ROHS COMPLIANT

151-62-3 Parametric

Parameter Name	Attribute value
Reach Compliance Code	unknown
Is Samacsys	N
Nominal attenuation	62 dB
Characteristic impedance	50 Ω
structure	COAXIAL
Maximum input power (CW)	30 dBm
Maximum insertion loss	1.1 dB
Maximum operating frequency	4000 MHz
Minimum operating frequency
Maximum operating temperature	75 °C
Minimum operating temperature	-20 °C
RF/Microwave Device Types	VARIABLE ATTENUATOR
Maximum voltage standing wave ratio	1.5
Base Number Matches	1

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Programmable Attenuators

Model 150

dc to 18.0 GHz

Model 151

dc to 4.0 GHz

Model 152

dc to 26.5 GHz

Relay Switched Programmable Attenuators

RoHS

PROGRAMMABILITY:

In each programmable step

Attenuator, solenoids are used to switch the internal resistor

card of each cell into and out of the circuit. Once the cell is

switched, the solenoid is magnetically latched into position

and is able to withstand extreme shock and vibration.

Internal circuitry is included to interrupt the coil current after

switching is complete. This reduces power dissipation even

if power is continuously applied. The switching time for each

cell is rated at 20 msec maximum which includes the con-

tact settling time.

Description

The Model 150, 151 and 152 Programmable Step

Attenuators represent the widest variety of programmable

attenuators available. This attenuator design is the result of

an extensive development program and offers long reliable

operation with exceptional accuracy and repeatability.

These attenuators can provide programmable adjustments

of RF signal levels in precise steps of 1 dB, 5 dB, 10 dB, or

with custom steps available. Each attenuator consists of a

cascaded assembly of

switched attenuator cells

(Figure 1). The attenuator

elements located in the

attenuator cell are created

by a thin-film process

which provides excep-

tional long-term stability,

low power and tempera-

ture coefficients. This

series uses a reed switch-

ing structure that provides

rapid switching together

with low insertion loss.

Other features include:

Figure 1. Cell Schematic

BROADBAND ACCURACY & LOW SWR:

The use of

Aeroflex / Weinschel's proprietary thin-film resistor process

provides these programmable step attenuators with a high

degree of accuracy and the lowest possible SWR uncer-

tainty (refer to specifications for actual values). This thin film

process permits the construction of circuits which are truly

distributed and without stray reactances, even at the higher

microwave frequencies.

RELIABILITY:

Each programmable step attenuator is

composed of 3 to 5 (4 in most models) cells. As with all

mechanical designs, usable life becomes a primary concern

to the user. With this in mind Aeroflex / Weinschel backs all

these attenuators with a rated switch life of 5 million

operations per cell. Standardized testing is also performed

on each programmable step attenuator over its operating

frequency range by a computer controlled Aeroflex /

Weinschel Attenuation Measurement System which is

traceable to NIST standards.

ENVIRONMENTAL:

These Model 150 Programmable Step

Attenuators have undergone an extensive environmental

qualification program and have been subjected to

temperature, shock, vibration, and humidity conditions per

MIL-STD-202F. These programmable step attenuators

operate within these specifications at an ambient

temperature of -20° to +75°C. Operating beyond these

limits will adversely affect the accuracy and could damage

the internal circuitry.

Broadband Frequency Coverage

High Accuracy and Repeatability

Long Life, 5 Million Cycles Per Cell

3, 4, and 5 Cell Configurations

For additional information on the 150 Series, visit our website @ www.aeroflex.com/AW/programmables.htm

112

5305 Spectrum Drive, Frederick, MD 21703-7362 TEL: 301-846-9222, 800-638-2048 Fax: 301-846-9116

web: www.aeroflex.com/weinschel email: weinschel-sales@aeroflex.com

Revision Date: 2/12/10

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