Rohde & Schwarz FSH4 3.6GHz Spectrum Analyzer

Rohde & Schwarz FSH4 3.6GHz Spectrum Analyzer Description:

• 9KHz-3.6GHz frequency range
• Portable, battery powered, handheld
• 1Hz to 3MHz resolution bandwidths
• Up to -161dBm DANL
• Low measurement uncertainty (< 1 dB)

The Rohde & Schwarz FSH4 is a member of the FSH family of spectrum analyzers. The Rohde & Schwarz FSH is rugged, handy and designed for use in the field. Its low weight, its simple, well-conceived operation and the large number of measurement functions make it an indispensable tool for anyone who needs an efficient measuring instrument for outdoor work.

The Rohde & Schwarz FSH is a spectrum analyzer and, depending on the model and the options installed, a power meter, a cable and antenna tester and a two-port vector network analyzer. It provides the three most important RF analysis functions that an RF service technician or an installation and maintenance team needs to solve daily routine measurement tasks. For example, it can be used for maintaining or installing transmitter systems, checking cables and antennas, assessing signal quality in broadcasting, radiocommunications and service, measuring electric field strength or in simple lab applications. The Rohde & Schwarz FSH can perform any of these tasks quickly, reliably and with high measurement accuracy.

Weighting only 3 kg, the Rohde & Schwarz FSH is a handy instrument.

All frequently used functions have their own function keys and are within reach of your fingertips. The brilliant color display is easy to read even under poor lighting conditions and has a monochrome mode for extreme conditions.

The capacity of the Rohde & Schwarz FSH battery enables you to work without interruptions for up to 4.5 hours. The battery is changed within seconds. And if it rains? No problem all connectors are splash-proof.

The Rohde & Schwarz FSH is designed for the installation and maintenance of transmitter systems. For this purpose, it provides the following measurement functions:

- Checking of signal quality in the spectral and time domain with channel power measurements and measurements on pulsed signals.
- Distance-to-fault measurements on cables and one-port cable loss measurements.
- Measuring of antenna match and testing of power amplifiers with vector network analysis.
- Determination of transmission power with power sensors.

By means of the TDMA POWER function, the Rohde & Schwarz FSH performs time-domain power measurements within a time division multiple access (TDMA) timeslot. To make work easier for the user, all required instrument settings are already predefined for the GSM and EDGE standards.

The Rohde & Schwarz FSH determines the power of a definable transmission channel by means of the channel power measurement function. A channel power measurement for the LTE, 3GPP WCDMA, cdmaOne and CDMA2000 1) 1x digital mobile radio standards is performed at a keystroke.

When base stations are put into operation or maintained, a quick overview of the modulation characteristics, the power of the code channels and signal quality is necessary.

The Rohde & Schwarz FSH-K44 option demodulates 3GPP WCDMA base station signals and performs a detailed analysis.

In addition to the overall power, it measures the power of the most important code channels such as common pilot channel (CPICH), primary common control physical channel (P-CCPCH) as well as primary and secondary synchronization channel (P-SCH and S-SCH). It also displays the carrier frequency offset and the error vector magnitude (EVM) which is used to draw conclusions about signal quality. The ratio of the chip energy (Ec) to the power density of the interference signal (I0) provides information about the signal-to-noise ratio. The scrambling code can be determined at the press of a button and used automatically for decoding the code channels. To get a quick overview of adjacent base stations, the Rohde & Schwarz FSH provides up to eight scrambling codes with associated CPICH power.

The distance-to-fault, caused by a pinched cable or by loose or corroded cable connections, is determined quickly and precisely. The built-in threshold function ensures that only true cable faults, i.e. faults that exceed a tolerance limit, are displayed in a list. This considerably simplifies the evaluation of the measurement.

The vector measurements option transforms the Rohde & Schwarz FSH models with built-in tracking generator and internal VSWR bridge into a two-port vector network analyzer.

Matching and transmission characteristics of filters, amplifiers, etc., can be determined quickly and with high accuracy in the forward and reverse direction with only one test setup. The built-in DC bias supplies power to active DUTs such as amplifiers via the RF cable. This function is especially useful for mast-mounted amplifiers of a mobile radio base station.

If you do not need the advantages of vector network analysis for reflection and transmission measurements, the Rohde & Schwarz FSH models featuring a built-in tracking generator are a more cost-effective solution for determining the transmission characteristics of cables, filters and amplifiers. The Rohde & Schwarz FSH models with a built-in VSWR bridge (models .24 and .28) can, in addition, measure the matching (return loss, reflection coefficient or VSWR), e.g. of an antenna.

The Rohde & Schwarz FSH can determine the cable loss of installed cables without much effort. It is sufficient to connect one end of the cable to the Rohde & Schwarz FSH measurement port. The other end of the cable is terminated with a short circuit or left open.

The Rohde & Schwarz FSH-K45 vector voltmeter option displays the magnitude and phase of a DUT on a fixed frequency. Thus, the Rohde & Schwarz FSH (models .24 and .28) can replace a conventional vector voltmeter for many applications. Because the required signal source and bridge are already available in the Rohde & Schwarz FSH, costs are saved and the test setup is significantly simplified, making the Rohde & Schwarz FSH-K45 the right choice for field use. For relative measurements, the measurement results of a reference DUT are stored at the press of a button. Comparison measurements, e.g. between different RF cables and a reference cable (golden device), can be quickly and easily performed.

By using the RSHA-Z240 GPS receiver, the Rohde & Schwarz FSH documents where a measurement is carried out. The display indicates the longitude and latitude of the site. If required, the position can be stored together with the measurement results. Moreover, the GPS receiver increases the frequency measurement accuracy by synchronizing the internal reference oscillator to the GPS frequency reference. To fasten the GPS receiver on the roof of a car, for example, the GPS receiver is equipped with a magnet and a 5 m cable.

Equipped with the Rohde & Schwarz FSH-Z1 and Rohde & Schwarz FSH-Z18 power sensors, the Rohde & Schwarz FSH becomes a highly accurate RF power meter up to 8 GHz or 18 GHz with a measurement range from 67 dBm to +23 dBm.

The Rohde & Schwarz FSH-Z14 and Rohde & Schwarz FSH-Z44 directional power sensors transform the Rohde & Schwarz FSH into a full-featured directional power meter for the frequency ranges from 25 MHz to 1 GHz and from 200 MHz to 4 GHz. The Rohde & Schwarz FSH can then simultaneously measure the output power and the matching of transmitter system antennas under operating conditions. The power sensors measure average power up to 120 W and normally eliminate the need for any extra attenuators. In addition, the peak envelope power (PEP) up to max. 300 W can be determined.

The effects of electromagnetic fields (EMF) caused by transmitter systems can be reliably determined by the Rohde & Schwarz FSH.

When measuring electric field strength, the Rohde & Schwarz FSH takes into account the specific antenna factors of the connected antenna. The field strength is displayed directly indBV/ m.IfW/ m2 is selected, the power flux density is calculated and displayed. In addition, frequencydependent loss or gain, e.g. of a cable or amplifier, can be corrected. For simple result analysis, the Rohde & Schwarz FSH provides two user-definable limit lines with automatic limit monitoring.

Equipped with the RSTS-EMF isotropic antenna, the Rohde & Schwarz FSH can determine the direction-independent resultant field strength in the frequency range from 30 MHz to 3 GHz. The antenna includes three orthogonally arranged antenna elements for measuring the resultant field strength. The Rohde & Schwarz FSH sequentially activates the three antenna elements and calculates the resultant field strength, taking into account the antenna factors for each individual antenna element as well as the cable loss of the connection cable.

The RSHZ-15 near-field probes are used as diagnostic tools for locating EMC problems, e.g. on circuit boards, integrated circuits, cables and shieldings. The RSHZ-15 near-field probe set is adequate for emission measurements from 30 MHz to 3 GHz. The RSHZ-16 preamplifier improves measurement sensitivity up to 3 GHz, with approx. 20 dB gain and a noise figure of 4.5 dB. In combination with the Rohde & Schwarz FSH, the preamplifier and near-field probe set are a cost-effective means of analyzing and locating disturbance sources during development.

The Rohde & Schwarz FSH is operated via the keypad and rotary knob. The selected function can be activated directly using the Enter button that is integrated in the rotary knob. Due to the vertical design, you can easily reach all operating elements with your fingers. You can switch between different operating modes (e.g. spectrum analyzer, vector network analyzer, power meter) using the MODE key.

All basic settings can be conveniently set in a straightforward list. Measurement results including instrument settings are saved to the internal memory or the replaceable SD memory card. Predefined instrument settings can be locked to prevent them from being changed unintentionally. This reduces the danger of incorrect measurements.

Frequently required measurements can be summarized in a single menu using the USER key. User-defined instrument setups are then assigned to the softkeys under an individually selectable name. For documentation purposes, the contents of a screenshot can be saved as a graphics file.

The measurement results on the bright, 6.5 VGA color display are easy to read. The backlighting of the display can be adjusted to the ambient lighting conditions. For use in extremely strong sunlight, a special monochrome mode provides optimal contrast.

As an alternative to entering a frequency, you can tune the Rohde & Schwarz FSH by means of channel numbers. The channel number is displayed instead of the center frequency. Users who are familiar with channel assignments from common TV or mobile radio applications can operate the Rohde & Schwarz FSH even more easily. TV channel tables for a large number of countries are supplied with the Rohde & Schwarz FSH.

Altogether six Rohde & Schwarz FSH models for different applications and frequency ranges are available. The Rohde & Schwarz FSH4 and Rohde & Schwarz FSH8 can perform measurements up to an upper frequency limit of 3.6 GHz and 8 GHz, respectively. Models featuring a built-in tracking generator can also be used to determine the transmission characteristics of cables, filters, amplifiers, etc.

Additional models with built-in tracking generator and internal VSWR bridge are available for distance-to-fault (DTF) measurements, matching measurements and vector network analysis. All models have an adjustable preamplifier, making them suitable for measuring very small signals.

Two power sensors are available as accessories for precise terminating power measurements up to 18 GHz and for directional power measurements up to 4 GHz. The following tables show possible configurations for different standard functions and applications as well as an overview of available models.