The tracking generator extends the R&S FSH6

• Internal preamplifier with frequency range from 100 kHz to 6 GHz
• Displayed average noise level typ. -135 dBm (RBW 100 Hz)
• 0.5 dB typ. level accuracy up to 6 GHz
• Resolution bandwidths 100 Hz to 1 MHz, 1 and 3 steps
• Wide range of detectors : sample, max/min peak, auto peak, RMS
• Tracking Generator from 5 MHz to 6 GHz
• 90 dB typ. dynamic range for vector transmission measurement

Recommended extras:

R&S FSH-Z2 - VSWR SWR Bridge and Power Divider

R&S FSH-K2 - Vector Reflection and Transmission Measurements

Applications & options overview

R&S FSH models against applications	R&S FSH3/6/18 (model .03/.06/.18)	R&S FSH3 (model .13) with Tracking Generator	R&S FSH3/6 (model .23/.26) with Tracking Generator and Preamplifier
- Channel power - TDMA Power - Field Strength	x	x	x
Power Meter up to 8/18 GHz	+R&S FSH-Z1/Z18	+R&S FSH-Z1/Z18	+R&S FSH-Z1/Z18
Directional power measurement	+R&S FSH-Z44	+R&S FSH-Z44	+R&S FSH-Z44
Measurement on Cables (Distance to Fault)	-	+R&S FSH-Z2 +R&S FSH-B1	+R&S FSH-Z2 +R&S FSH-B1
One-port cable loss measurement	-	+R&S FSH-Z2 +R&S FSH-K2	+R&S FSH-Z2 +R&S FSH-K2
Scalar transmission measurement Vector transmission measurement 1)	-	x	x
Scalar reflection measurement Vector reflection measurement 1)	-	+R&S FSH-Z2	+R&S FSH-Z2
Receiver Mode	+R&S FSH-K3	+R&S FSH-K3	+R&S FSH-K3
Remote Control with RS-232-C interface	+R&S FSH-K1	+R&S FSH-K1	+R&S FSH-K1

C/N Measurement

The R&S FSH offers a carrier/noise (C/N) measurement for determining the ratio of carrier power to noise power or carrier power to noise power density. The R&S FSH supports three different modes for carrier power measurement. In the CW TX mode, the R&S FSH determines the power of an unmodulated carrier. In the digital TX mode, it determines the channel power of a reference channel, as is common with digitally modulated carriers (e.g. the DAB, DVB, DVB-T, DVB-H and J.83/A/B/C standards). Furthermore, the ATSC standard for digital terrestrial television with 8VSB modulation is supported. In the analog TV mode, the R&S FSH measures the peak power of the vision carrier with amplitude-modulated TV signals.

Channel-power measurements

The channel-power measurement function is for determining the power in a transmission channel specified by the user. After a few preliminary settings have been made, a single keystroke starts the R&S FSH3s spectrum measurement inside the channel, using a resolution bandwidth that is small relative to the channel bandwidth. The R&S FSH3 then integrates the measured values indicated by the trace to obtain and display the total power. All the settings required for the digital mobile radio standards 3GPP WCDMA, cdmaOne, CDMA2000 1x are predefined ready for use.

Directional power measurement

The Directional Power Sensors R&S FSH-Z14 and R&S FSH-Z44 turn the R&S FSH into a full-fledged directional power meter with a frequency range of 25 MHz to 1 GHz and 200 MHz to 4 GHz. The R&S 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. They are compatible with the common standards GSM/EDGE, 3GPP WCDMA, cdmaOne, CDMA2000 1x, DVB-T and DAB. Additionally, the peak envelope power (PEP) can be determined up to a maximum of 300 W.

Fieldstrength Measurement

When measuring electric field strength, the R&S FSH takes into account the specific antenna factors of the connected antenna. Field strength is displayed directly in dBµV/m. In addition, frequency-dependent loss or gain of, for example, a cable or an amplifier can be corrected. For quick and easy result analysis, the R&S FSH provides two user-definable limit lines with automatic limit monitoring.

Locating EMC weak spots

The Near-Field Probe Set R&S HZ-15 is a diagnostic tool for locating EMC weak spots on printed boards, integrated circuits, cables, shieldings and other trouble spots. The Near-Field Probe Set R&S HZ-15 can handle emission measurements from 30 MHz to 3 GHz. Its sensitivity can be enhanced by adding the Preamplifier R&S HZ-16, which has a frequency range up to 3 GHz, a gain of approx. 20 dB and a noise figure of 4.5 dB. In combination with the R&S FSH, the preamplifier and near-field probe set are a cost-effective means of analyzing and locating sources of interference during development.

Measurement with Channel Tables

Channel tables make it possible to tune the R&S FSH using channel numbers as an alternative to frequency entry. The channel number is displayed instead of the center frequency. This makes operation simple by offering users channel assignments they are accustomed to from familiar TV and mobile radio applications. The channel tables are generated with the R&S FSH View software and loaded into the R&S FSH. The software comes with TV channel tables for virtually the entire world. Up to 15 different frequency bands can be easily defined within a channel table. The R&S FSH can even handle gaps in channel numbering or with assigned frequencies (as usually occur with TV channel assignments, for example). Alternatively, a channel table can be defined directly on the instrument by entering the first channel number together with the associated frequency, the number of channels and the channel spacing. ( Available for all R&S FSH models as standard, requires at least firmware 7.0 )

Measurements on cables

For rapidly and accurately determining the distance to any defects in an RF cable. Distance-to-fault measurements using the VSWR Bridge R&S FSH-Z2 give an immediate overview of the state of the device under test (return loss and distance, see Fig.). Only applies to R&S FSH3 with tracking generator, with installed option R&S FSH-B1 (distance-to-fault measurement) and R&S FSH-Z2 (VSWR bridge and power divider).

One-port cable loss measurement

A normal transmission measurement usually does not allow the cable loss of long cables already installed to be determined, since the cable cannot simply be connected between the tracking generator output and the RF input of the analyzer. The new one-port cable loss measurement function provides this possibility. One end of the cable is connected to the VSWR bridge, and the other end is terminated with a short circuit or simply left open. The R&S FSH3 automatically takes into consideration that the signal is attenuated twice due to the total reflection at the cable end. The R&S FSH3 calculates the cable loss from the mean value of the maximum and the minimum of the displayed trace. This means that the cable loss is the mean value inside the displayed frequency range. The loss at specific frequencies can be determined by using one or more markers. The one-port cable loss measurement is only available with the R&S FSH-K2 option.

Power measurements

When the accessory Power Sensor R&S FSH-Z1 or R&S FSH-Z18 is fitted, the R&S FSH3 is transformed into a high-precision RF power meter with a maximum frequency of 8 GHz or 18 GHz. As with thermal sensors, the true RMS value of the measured signal is obtained over the whole measurement range irrespective of the signal waveform. This is particularly relevant when measurements are made on modulated signals because no additional measurement errors are introduced. The measurements are straightforward, which is very important for digitally modulated signals such as 3GPP. The large measurement range which covers 200 pW to 200 mW (equivalent to a dynamic range of 90 dB) turns the R&S FSH3 with the R&S FSH-Z1 or R&S FSH-Z18 into a universal RF power meter.

Receiver Mode

When equipped with the firmware option R&S FSH-K3, the R&S FSH can be operated as a receiver for monitoring and precompliance EMC applications. Measurements are performed at a predefined frequency with a user-selectable measurement time. In the scan mode, the R&S FSH sequentially measures each level at various frequencies defined in a channel table. The channel tables are generated with the R&S FSH View software and loaded into the R&S FSH. The screenshot on the right shows, for example, a measurement of the level assignment in the GSM uplink band displayed as vertical lines. In addition, the CISPR bandwidths 200 Hz, 9 kHz, 120 kHz and 1 MHz are available for RFI emission measurements. The R&S FSH offers peak, average, RMS and quasi-peak detectors. (Available for all R&S FSH models with installed R&S FSH-K3 keycode and firmware >= 7.0)

Scalar network analysis

Filter scalar transmission measurement: The R&S FSH3 with built-in tracking generator can be used to determine the transmission characteristics (i.e. attenuation or gain) of twoports such as cables, filters, amplifiers, etc, rapidly and with a minimum of effort. A simple calibration procedure compensates for the attenuation introduced by measurement cables or any attenuators used for amplifier measurements. When the VSWR Bridge R&S FSH-Z2 is fitted, the matching (return loss or VSWR) at the input or output of twoports can be determined as well as their transfer function. The bridge is screwed directly onto the R&S FSH3s RF input and tracking generator output, and no extra, cumbersome cabling is required.

TDMA power measurements

Basically, when TDMA (time division multiple access) methods are employed, e.g. GSM, several users share a frequency channel. Each user is assigned a single timeslot. The R&S FSH3s TDMA POWER function performs time-domain power measurements in these timeslots. All the settings required for the GSM and EDGE standards are predefined on the R&S FSH3 to make these measurements easier for the user. The R&S FSH3 can use external triggering or video triggering to start power measurements.

Vector network analysis

Compared to scalar measurements, the optional R&S FSH-K2 vector measurement significantly increases measurement accuracy and dynamic range for transmission and reflection measurements. This is possible because the receive signal is analyzed with respect to magnitude and phase. After calibration, complex correction of the system errors can be effected by the R&S FSH3. In order to examine the matching of an antenna, for example, in detail, you need to know magnitude and phase. This information can be displayed in a Smith chart. For an easy assessment of the measurement results, it is possible to define a limit line with limit monitoring in the Smith chart.

Designation		Type	Order No.
Base Unit
	Handheld Spectrum Analyzer Rapid, high-precision, cost-effective signal investigations from 100 kHz to 6 GHz	R&S® FSH6 (model .26)	1145.5850.26
Options
	Distance-to-fault Measurement for R&S FSH3	R&S® FSH-B1	1145.5750.02
Accessories
	Active Directional Antenna	R&S® HE-200	4050.3509.02
	Carrying Bag for R&S FSH	R&S® FSH-Z25	1145.5896.02
	Combined Short/Open/50 Ohm Load for SWR and DTF Calibration	R&S® FSH-Z29	1300.7504.02
	Directional Power Sensor 25 MHz to 1 GHz, 30 mW to 120 (300) W, N connectors	R&S® FSH-Z14	1120.6001.02
	Directional Power Sensor 200 MHz to 4 GHz, 120 W	R&S® FSH-Z44	1165.2305.02
	Spare Combined Short/Open and 50 Ohm Load for VSWR and DTF calibration DC to 6 GHz	R&S® FSH-Z28	1300.7804.02
	VSWR Bridge & Power Divider 10 MHz to 3 GHz, for R&S FSH3	R&S® FSH-Z2	1145.5767.02
	VSWR Bridge with DC Bias and Bypass Switch, 10 MHz to 6 GHz Spectrum measurement and transmission measurement with connected VSWR bridge	R&S® FSH-Z3	1300.7756.02
Software
	Vector Reflection and Transmission Measurement	R&S® FSH-K2	1157.3387.02
Spare Parts
	Spare Short/Open Standard	R&S® FSH-Z30	1145.5773.02
	Spare 50 Ohm Load Standard	R&S® FSH-Z31	1145.5780.02