TEKBOX DIGITAL SOLUTIONS TBHDR1 Manual - User Manual

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TBHDR1

HIGH DYNAMIC RANGE AMPLIFIER

The TBHDR1 is a high dynamic range amplifier with a frequency range from 30kHz to 1.5GHz. Its gain

is characterized up to 6GHz.

1.0

TBHDR1

MANUAL

CONTENTS

1 INTRODUCTION 3

1.1 APPLICATION

2 ELECTRICAL SPECIFICATIONS 4

3 APPLICATION AS PRE-AMPLIFIER FOR SPECTRUM ANALYZERS

4 ORDERING INFORMATION 8

5 HISTORY 8

1.0

TBHDR1

TABLES

Table 1 – TBHDR1 gain

Table 2 – Ordering Information

Table 3 – History

PICTURES

Picture 1 – TBHDR1 wide-band RF pre-amplifier, front view

Picture 2 – TBHDR11 wide-band RF pre-amplifier, rear view

Picture 3 – TBHDR1, gain, 30 kHz – 1 MHz

Picture 4 – TBHDR1, gain, 30 kHz – 1.5 GHz

Picture 5 – TBHDR1, gain, 30 kHz – 6 GHz

Picture 6 – TBHDR1, input return loss, lS11l, 30 kHz – 1.5 GHz

Picture 7 – TBHDR1, output return loss, lS22l, 30 kHz – 1.5 GHz

TBHDR1

MANUAL

1. INTRODUCTION

The TBHDR1 is a high dynamic range amplifier with a frequency range

from 30kHz to 1.5GHz. Its gain is characterized up to 6GHz.

The TBHDR1 has a high IP3 and a low noise figure which makes it an

Picture 1 – TBHDR1 wide-band RF pre-amplifier, front view

Picture 2 – TBHDR1 wide-band RF pre-amplifier, rear view

1.1 APPLICATION

• General purpose gain block

• Pre-amplifier in applications with low noise and high IP3 requirements

• Pre-amplifier for spectrum analyzers, especially in EMC pre-compliance test applications.

• Loop antenna amplifier

ideal alternative pre-amplifier for spectrum analyzers and receivers in

EMC test applications. Due to its low noise figure, high IP3 and gain

down to the kHz range it also performs very well as amplifier for active

loop antennas.

2. ELECTRICAL SPECIFICATIONS

Technical Data:

• Maximum supply voltage: 5.5V

• Maximum input power: +10 dBm

• Input, Output: 50 Ohm, SMA female

• Nominal supply Voltage: 5V, typ. 100mA, Mini-USB-B connector

• 1dB output compression point @ 100 MHz: +19.2 dBm typical

• 1dB output compression point @ 500 MHz: +19 dBm typical

• 1dB output compression point @ 1000 MHz: +18.3 dBm typical

• 3rd order output intercept point @ 100 MHz: +38dBm

• 3rd order output intercept point @ 500 MHz: +37dBm

• 3rd order output intercept point @ 1000 MHz: +33dBm

• Reverse isolation S12: -28dB

• Input matching: 30kHz-1.5GHz < - 16 dB

• Output matching: 30kHz-1.5GHz < - 10 dB

• Noise Figure: 2.7 dB

30 kHz

150 kHz

1 MHz

100 MHz

500 MHz

1 GHz

1.5 GHz

3 GHz

6 GHz

22.5 dB

23.6 dB

24.2 dB

24 dB

22.9 dB

21.1 dB

19.5 dB

14.1 dB

5.3 dB

typ. gain:

TBHDR1

MANUAL

Picture 3 – TBHDR1, gain, 30 kHz – 1 MHz

Table 1 – TBHDR1 gain

TBHDR1

MANUAL

Picture 4 – TBHDR1, gain, 30 kHz – 1.5 GHz

Picture 5 – TBHDR1, gain, 30 kHz – 6 GHz

TBHDR1

MANUAL

Picture 6 – TBHDR1, input return loss, lS11l, 30 kHz – 1.5 GHz

Picture 7 – TBHDR1, output return loss, lS22l, 30 kHz – 1.5 GHz

TBHDR1

MANUAL

3. APPLICATION AS PRE-AMPLIFIER FOR SPECTRUM ANALYZERS

In applications, where signals close to the base noise floor of the

spectrum analyzer need to be investigated, it may be necessary to turn

on the internal pre-amplifier. However, as pre-amplifiers of spectrum

analyzers are typically optimized for low noise, non-linearities may

create distortions, which falsify the displayed spectrum. Third order non-

linearities are especially critical, as they often appear in the frequency

range of interest.

EXAMPLE:

The picture below shows two signals with an amplitude of -35dBm and frequencies 200MHz, 200.1MHz at the input of a spectrum analyzer

If there is no requirement to look at signals with amplitudes close to

the noise floor, everything is fine. However, if the spectrum has

to be checked for signals with amplitudes close to the noise floor of

approximately -100 dBm, the internal pre-amplifier of the spectrum

analyzer needs to be turned on.

The picture below shows the spectrum of exactly the same set up,

with the pre-amplifier of the spectrum analyzer turned on. It shows two

additional spectral lines which are caused by third order intermodulation

of the internal preamplifier. Assuming there are more than two signals

present at the analyzer, e.g. when doing radiated or conducted noise

EMC pre-compliance testing or when investigating broadcast spectrum.

It will become hard to tell which signals are real and which signals

are intermodulation products generated by the pre-amplifier of the

spectrum analyzer:

TBHDR1

MANUAL

The following spectrum shows the spectrum of the same set up, however

using the TBHDR1 pre-amplifier instead of the internal amplifier of

the analyzer. Due to the high IP3 of the TBHDR1, the amplitude of

the intermodulation products are significantly lower, compared to the

preamplifier of the spectrum analyzer.

4. ORDERING INFORMATION

PART NUMBER

DESCRIPTION

TBHDR1

24 dB pre-amplifier, 1 pc 25cm SMA-male to SMA-male cable, 1 pc 75cm SMA- male to N-male

cable. 1 pc SMA-female to N-male coaxial adapter, USB cable, measurement plot

5. HISTORY

VERSION

DATE

AUTHOR

CHANGES

V1.0

30.8.2017

Mayerhofer

Creation of the document

Table 2 – Ordering Information

Table 3 – History

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