Atec Agilent-355C User Manual download pdf

HP 355C/D

VHF Attenuators

dc to 1 GHz

Technical Specifications

Features and

Applications

Description

Precision attenuation from dc to

1000 MHz is available with these

Hewlett-Packard attenuators.

Model 355C provides 0 to 12 dB

in 1-dB steps and Model 355D

provides 0 to 120 dB in 10-dB

steps. Standard 355C’s and D’s

are equipped with BNC

connectors. Units can be coupled

together with a standard

UG-491A/U male-to-male BNC

adapter. Option 001 Type N

connector 355’s are ideally suited

for applications such as receiver

testing where minimum leakage

is important. Option 001 355’s

may be couple together with

the HP 1250-0778 Type N male-

to-male adapter (UG-57B/U).

Using the 355C and 355D in

series provides precision The

•Broad frequency coverage,

dc to 1000 megahertz

•Low insertion loss

•Low SWR and negligible

leakage

•Measure gain, attenuation,

frequency response

•Broaden usefulness of present

equipment

•Calibrate signal sources

attenuation in 1-dB steps from

0 to 132 dB. Also, these

attenuators may be connected

with either terminal as input

or output.

Basic Design

A departure from the usual

attenuator design has resulted in

an accurate, compact, and rugged

attenuator with low insertion

loss and low SWR. Error is

reduced to a minimum on all

steps. Attenuator sections are

inserted and removed by cam-

actuated microswitches which

keep lead lengths short. This

novel system minimizes stray

capacitances and inductances

and extends the upper frequency

limit of the HP 355 attenuators

to 1000 MHz. In addition, the

phase shift is kept at a minimum.

electrical length for the

355 C/D is approximately 60 cm

at 0 dB (no sections engaged).

For each section engaged, the

electrical length decreases

approximately 2 cm.

In addition, the design provides

a rugged, compact unit in which

the component parts are rigidly

positioned and well shielded so

that neither stray pickup nor

signal leakage is a problem. The

355 attenuators are available for

either bench or panel mounting

(Option 003). To enable the

attenuator to be panel mounted,

the shaft has been extended

0.18 in. and the casting drilled

and tapped for (4) 6-32 screws.

Remotely programmable units

are also available under model

numbers 355E and 355F.

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Summary of Contents

Page 1 - Technical Specifications

HP 355C/DVHF Attenuatorsdc to 1 GHzTechnical SpecificationsFeatures andApplicationsDescriptionPrecision attenuation from dc to1000 MHz is available wi

Page 2 - Specifications

SpecificationsModel 355CAttenuation: 12 dB in 1-dB steps.Frequency Range: DC to 1000 MHz.Overall Accuracy: ±0.1 dB at 1000 MHz; ± 0.25 dB dc, to 500 M

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Atec Agilent-355C User Manual

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