Environmental protection monitoring (EMF) electromagnetic compatibility / electromagnetic interference (EMC / EMI) test system program

Environmental protection monitoring (EMF) electromagnetic compatibility / electromagnetic interference (EMC / EMI) test system program

1 Introduction

With the increasing popularity of radio communications, the impact on the environment and people's lives due to wireless radiation is also increasing. Rohde & Schwarz (R & S) 's handheld wireless spectrum analyzer and TS-EMF system have built an EMF test system with excellent functions and easy to use.

Compared with desktop computers, the biggest problem faced by portable radio test instruments is that they must maintain sufficient RF performance, achieve rich test functions, and extend battery operating time on the premise of small size, light weight and low cost.

With more than 70 years of leading experience and innovative technology in the field of radio test and measurement, Rohde & Schwarz successfully launched the handheld spectrum analyzers R & S FSH3 (100kHz ~ 3GHz) and R & S FSH6 (100kHz ~ 6GHz). Good solution to the above problems.

Because R & S FSH achieves excellent radio frequency performance that the portable spectrum analyzer could not achieve before under the weight of 2.5 kg (including battery), it was designated as a dedicated portable spectrum analyzer for the International Space Station (ISS) project in 2004 on the International Space Station Successfully completed the relevant test tasks.

figure 1

• 2 Introduction to R & S FSH

Although R & S FSH is called a handheld spectrum analyzer, it can perform basic spectrum analysis, transmitter and antenna feeder testing, radio interference investigation, electromagnetic field strength monitoring, and electromagnetic compatibility (EMC) in different configurations. ) Diagnosis and other tests.

Therefore, we can regard R & S FSH as a portable multi-function radio test platform, not just a spectrum analyzer or an antenna feeder tester. The following table is the main technical parameters of R & S FSH *.

parameter

R & S FSH3

R & S FSH6

Frequency Range

100kHz ~ 3GHz

100kHz ~ 6GHz

Maximum input power

30dBm

30dBm

Resolution Bandwidth (RBW)

100H z ~ 1MHz

100H z ~ 1MHz

Video bandwidth (VBW)

10H z ~ 1MHz

10H z ~ 1MHz

Third order cutoff point (TOI)

> 10dBm, typical value 15dBm

> 10dBm, typical value 13dBm

No intermodulation dynamic range

70dB

66 dB

Noise floor (DANL), pre-release

Typical value -135dBm / 100Hz
-130dBm

Typical value -135dBm / 100Hz
-130dBm

Single sideband phase noise

<100dBc / Hz @ 100kHz

<100dBc / Hz @ 100kHz

Level measurement accuracy

<1.5dB, typical value 0.5dB

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