National Instruments NI 9770 Manuale utente

GETTING STARTED GUIDE

NI 9770

30 kHz to 100 MHz, 50 Ω, AC Coupled RF

Receiver Module

This document explains how to connect to the NI 9770.

Note Before you begin, complete the software and

hardware installation procedures in your chassis

documentation.

Note The guidelines in this document are specific to

the NI 9770. The other components in the system might

not meet the same safety ratings. Refer to the

documentation for each component in the system to

determine the safety and EMC ratings for the entire

system.

Safety Guidelines

Operate the NI 9770 only as described in this document.

Caution Do not operate the NI 9770 in a manner not

specified in this document. Product misuse can result in

a hazard. You can compromise the safety protection

built into the product if the product is damaged in any

way. If the product is damaged, return it to NI for

repair.

2| ni.com | NI 9770 Getting Started Guide

Absolute Maximum Input

RF IN +10 dBm

LO IN +15 dBm

Safety Guidelines for Hazardous Locations

The NI 9770 is suitable for use in Class I, Division 2, Groups A,

B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC T4

and Ex nA IIC T4 hazardous locations; and nonhazardous

locations only. Follow these guidelines if you are installing the

NI 9770 in a potentially explosive environment. Not following

these guidelines may result in serious injury or death.

Caution Do not disconnect I/O-side wires or

connectors unless power has been switched off or the

area is known to be nonhazardous.

Caution Do not remove modules unless power has

been switched off or the area is known to be

nonhazardous.

Caution Substitution of components may impair

suitability for Class I, Division 2.

NI 9770 Getting Started Guide | © National Instruments | 3

Caution For Division 2 and Zone 2 applications,

install the system in an enclosure rated to at least IP54

as defined by IEC/EN 60079-15.

Special Conditions for Hazardous Locations Use in

Europe and Internationally

The NI 9770 has been evaluated as Ex nA IIC T4 Gc equipment

under DEMKO Certificate No. 12 ATEX 1202658X and is

IECEx UL 14.0089X certified. Each NI 9770 is marked II 3G

and is suitable for use in Zone 2 hazardous locations, in ambient

temperatures of -40 °C ≤ Ta ≤ 70 °C. If you are using the NI 9770

in Gas Group IIC hazardous locations, you must use the device in

an NI chassis that has been evaluated as Ex nC IIC T4, Ex IIC

T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.

Caution The system shall only be used in an area of

not more than Pollution Degree 2, as defined in

IEC 60664-1.

Caution The system shall be mounted in an

ATEX/IECEx-certified enclosure with a minimum

ingress protection rating of at least IP54 as defined in

IEC/EN 60079-15.

4| ni.com | NI 9770 Getting Started Guide

Caution The enclosure must have a door or cover

accessible only by the use of a tool.

Electromagnetic Compatibility Guidelines

This product was tested and complies with the regulatory

requirements and limits for electromagnetic compatibility (EMC)

stated in the product specifications. These requirements and

limits provide reasonable protection against harmful interference

when the product is operated in the intended operational

electromagnetic environment.

This product is intended for use in industrial locations. However,

harmful interference may occur in some installations, when the

product is connected to a peripheral device or test object, or if the

product is used in residential or commercial areas. To minimize

interference with radio and television reception and prevent

unacceptable performance degradation, install and use this

product in strict accordance with the instructions in the product

documentation.

NI 9770 Getting Started Guide | © National Instruments | 5

Furthermore, any changes or modifications to the product not

expressly approved by National Instruments could void your

authority to operate it under your local regulatory rules.

Caution To ensure the specified EMC performance,

operate this product only with shielded cables and

accessories. Do not use unshielded cables or

accessories unless they are installed in a shielded

enclosure with properly designed and shielded input/

output ports and connected to the product using a

shielded cable. If unshielded cables or accessories are

not properly installed and shielded, the EMC

specifications for the product are no longer guaranteed.

Special Conditions for Marine Applications

Some products are Lloyd’s Register (LR) Type Approved for

marine (shipboard) applications. To verify Lloyd’s Register

certification for a product, visit ni.com/certification and search

for the LR certificate, or look for the Lloyd’s Register mark on

the product.

Caution In order to meet the EMC requirements for

marine applications, install the product in a shielded

enclosure with shielded and/or filtered power and

6| ni.com | NI 9770 Getting Started Guide

input/output ports. In addition, take precautions when

designing, selecting, and installing measurement probes

and cables to ensure that the desired EMC performance

is attained.

Preparing the Environment

Ensure that the environment in which you are using the NI 9770

meets the following specifications.

Operating temperature

(IEC 60068-2-1, IEC 60068-2-2)

-40 °C to 70 °C

Operating humidity

(IEC 60068-2-78)

10% RH to 90% RH,

noncondensing

Pollution Degree 2

Maximum altitude 5,000 m

Indoor use only.

Note Refer to the device datasheet on ni.com/manuals

for complete specifications.

NI 9770 Getting Started Guide | © National Instruments | 7

Connecting the NI 9770

The NI 9770 provides connections for one RF input, one local

oscillator input, and one local oscillator output.

8| ni.com | NI 9770 Getting Started Guide

Figure 1. NI 9770 Pinout

RF IN

LO IN

LO OUT

GND

NI 9770 Getting Started Guide | © National Instruments | 9

Table 1. NI 9770 Connector Descriptions

Connector Name Use

RF IN Connects the analog RF input signal to the NI 9770.

LO OUT Exports the LO signal between multiple NI 9770

receivers for applications that require precise

synchronization.

LO IN Imports the LO signal between multiple NI 9770

receivers for applications that require precise

synchronization.

Note To avoid spurious readings, do not connect any

cable to the LO OUT and LO IN connectors when

operating the NI 9770 as a standalone module.

Connecting the NI 9770 to a Device Under Test

You can connect the NI 9770 to the equipment under test through

a current transformer. The current transformer provides electrical

isolation between the equipment under test and the NI 9770 and

allows the NI 9770 to measure high-frequency currents flowing

into the ground connection of the equipment under test.

10 | ni.com | NI 9770 Getting Started Guide

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