R&S FSH-Z1/-Z18 Service Manual
Contents
1. The numeric values in brackets refer to the item in the list of mechanical parts and i k spare parts in section 5 These items are identical to the item numbers in the drawings illustrating the module replacement 1165 2286 82 3 4 E 2 R amp S FSH Z1 Z18 Module Replacement Unlock Contact side A Unlock Lock Fig 3 2 Membrane cables SL Note Remove membrane cables Membrane cables can be removed after unlocking the female connector Connect membrane cables Observe the contact side and lock the female connector 1165 2286 82 3 5 E 2 Module Replacement R amp S FSH Z1 Z18 List of Modules Table 3 2 List of modules spare parts for R amp S FSH Z1 and R amp S FSH Z18 Deme mem J CHEN meme o URP EREECHEN e emm o pem ow seme Il Les REESEN CECR Low ueemema remm m umememae meme m uememe emm EN ADAPTER FROM FSH TO NRP Kc 1155 4940 00 Available but not in spare parts stock therefore longer delivery times Spare part not available to be replaced only via Central Service of Rohde amp Schwarz 1165 2286 82 3 6 E 2 R amp S FSH Z1 Z18 Module Replacement Opening and Reassembly Exchange of Plastic Shell Halves Opening Undo two screws 170 on the two sides of the cable connector First pull off the plastic shell halves of the cable connector and take them apart by twisting them at the RF connector The shielding is a2. Designation e Number of units e Instrument type for the replacement part e Contact person for possible questions The R amp S stock number to be used when ordering replacement parts and modules as well as power cables can be found further below 1165 2286 82 5 1 E 1 Shipping of Instrument and Ordering of Spare Parts R amp S FSH Z1 Z18 Ordering Replacement Sensors Rohde amp Schwarz maintains a replacement program for a number of power sensors Within this program it is possible to provide a fully operational power sensor to replace a defective one at short notice and at a fixed price Please note that replacement sensors are used equipment but are always tested They are therefore equivalent to new sensors even though they may exhibit slight signs of use If required the delivery of replacement sensors can include a new calibration If interested please contact your nearest Rohde amp Schwarz office 1165 2286 82 5 2 E 1 R amp S FSH Z1 Z18 Spare Parts Spare Parts The R amp S stock numbers necessary for ordering replacement parts and modules can be found in the spare part lists provided below List of R amp S FSH Z1 Z18 Spare Parts The following table lists available spare parts together with their R amp S stock numbers Item No Designation Electrical Stock No identification 20 ANALOG BOARD A2 40 POWER SENSOR CABLE FSH Z1 W1 1155 4563 02 60 SCREW 7985 ISR M2X8
3. gt 2 4 GHz to gt 8 GHz to gt 12 4 GHz to Frequency lt 30 MHz 2 4 GHz 8 GHz 12 4 GHz 18 GHz Only R amp S FSH Z18 1165 2286 82 1 4 E 1 R amp S FSH Z1 Z18 Quick Test Quick Test The following tests are used to check the R amp S FSH Z1 and R amp S FSH Z18 with simple means If the tests are passed compliance of the sensors with the specifications within the complete frequency and power range is largely ensured The test consists of e Zeroing e Absolute measuring accuracy at 0 dBm 50 MHz e Linearity with reference to 0 dBm 50 MHz e Input impedance for DC voltage current Test Instructions e The tests are to be performed at an ambient temperature of 15 C to 35 C The DUT should be connected to the activated R amp S NRP base unit for at least 30 minutes before the tests are performed e The test limits used in the following sections are based on the data sheet but are valid only on the conditions defined for the corresponding test step They are therefore not binding as far as accuracy is concerned but are strictly data sheet information e The entries made on the Spectrum Analyzer R amp S FSH are abbreviated as follows lt KEY gt Press front panel key e g SPAN lt SOFTKEY gt Press softkey e g MARKER gt PEAK lt nn unit gt Enter value and confirm with unit e g 12 kHz Successive entries are separated by e g BW MANUAL RES BW 3 kHz 1165 2286 82 1 5 E 1 Q
4. in R amp S FSH Error source within base unit Replace defective cable in cable set or exchange motherboard Error source within sensor Open sensor and check connection of sensor cable W1 with digital board Exchange sensor cable Send sensor in for repair digital board possibly defective R amp S FSH base unit detected error error message Power Sensor Error Potential error source and further corrective steps Base unit and sensor cannot communicate with each other The firmware versions may not be compatible If updated firmware does not correct problem perform the same measures as described above sensor is not found 11 E 2 Troubleshooting e Error Troubleshooting instruction y Check whether error also occurs on a different base unit Problems during measurement e Error Troubleshooting instruction Perform performance test or selftest according to section 1 1165 2286 82 3 12 R amp S FSH Z1 Z18 Power Sensor detected error error message Power Sensor Hardware Error Potential error source and further corrective steps The sensor detected an error during selfttest or during communication hardware defect or defective voltage supply Error source within base unit Exchange mainboard Error source within sensor Send sensor in for repair analog board or digital board is defective Measured power readings are erroneous Potential error source and fur
5. Item Characteristic Min value Actual value Max value Unit no 1 Zeroing Jj 66 0 dBm 2 Absolute measuring accur 0 10 0 10 dBm at 0 dBm 50 MHz 3 Linear of meas path 1 gt 2 0 10 0 10 dB AL AL 4 Linear of meas path 2 gt 3 0 10 0 10 dB AL3 AL 5 Input impedance 50 2 51 8 Q Quick test Power Sensor R amp S FSH Z18 Stock number 1165 1909 02 Name ue Ee Serial number Date dw Item Characteristic Min value Actual value Max value Unit no 6 Zeroing 66 0 dBm 7 Absolute measuring accur 0 10 0 10 dBm at 0 dBm 50 MHz 8 Linear of meas path 1 gt 2 0 10 0 10 dB AL AL 9 Linear of meas path 2 gt 3 0 10 0 10 dB AL3 AL 10 Input impedance 50 2 51 8 Q 1165 2286 82 1 10 E 1 R amp S FSH Z1 Z18 Preliminary Remarks 2 Adjustment Preliminary Remarks The Sensors R amp S FSH Z1 and R amp S FSH Z18 cannot be adjusted manually but have to be adjusted by updating the calibration data in the memory Calibration Software Recal which is part of the equipment supplied with the Calibration Kit R amp S NRVC is therefore required The measurement results for the absolute calibration of the three measurement paths which can be obtained during a performance test see Section 1 form the basis of the adjustment The Calibration Kit R amp S NRVC is recommended but is not mandator
6. amp ROHDE amp SCHWARZ Test and Measurement Division Service Manual Average Power Sensor R amp S FSH Z1 10 MHz to 8 GHz 200 pW to 200 mW 1155 4505 02 R amp S FSH Z18 10 MHz to 18 GHz 200 pW to 200 mW 1165 1909 02 Printed in the Federal Republic of Germany R amp S FSH Z1 Z18 Contents Section 1 Contents 1 Performance KC EE 1 1 Preliminary RemalikKs 1 obe DU eae b C e eO On 1 1 Test Instructions dao ehh dte td danda es 1 1 Measuring Equipment and Accessories eee emm 1 1 Performance Test with Calibration Kit R amp S NRVC and Calibration Software Recal 1 2 Performance Test with Other Measuring Eouipment 1 2 Checking Absolute Measuring Accuracy sssssssssssseeeeee ener nennen nnne trennen nns 1 2 Checking the Linearttv en enne nn nhnnennnnnnn nent ns sn trt et reser ss sten en 1 3 leie BE le DEE 1 4 QUICK TeSt cose 1 5 BK du Eelere feist cii be Mande ae ine dela ie HR deu 1 5 Measuring Equipment and Accessories Required for the Quick Test 1 6 GMECKING ZOOMING lenem t tiit eI et n E Lectt eyes 1 6 Checking the Absolute Measuring Accuracy sssssssssssseeenenneeeennn nennen nennen 1 7 Checking the Linearity eeepc dead redierat ae gd 1 7 Checking Input Impedance ener enne nnne en rris nnn enn 1 9 TOStURGDO Mhz cp 1 10 1165 2286 82 I 1 1 E 1 R amp S FSH Z1 Z18 Contents Section 2 Contents 2
7. displayed on R amp S FSH Setting on signal generator 10 dBm Measurement Read magnitude of level variation AL on R amp S FSH and store approx 10 dB Test Calculate nonlinearity AL AL for level movement from 20 dBm measurement path 1 to 10 dBm measurement path 2 and check for compliance with limits of test report Setting on step attenuator 0 dB Setting on signal generator 0 dBm Setting on R amp S FSH REF gt REF Measurement 0 00 dB must be displayed on R amp S FSH Setting on signal generator 10 dBm Measurement Read magnitude of level variation AL3 on R amp S FSH and store approx 10 dB Test Calculate nonlinearity AL AL for level movement from 0 dBm measurement path 2 to 10 dBm measurement path 3 and check for compliance with limits of test report 1165 2286 82 1 8 E 1 R amp S FSH Z1 Z18 Quick Test Checking Input Impedance Test setup System voltmeter is set to 4 pin impedance measurement and is connected to DUT according to figure High Sense High _ gt Sense Low _ gt Low 6 7 DUT Fig 1 2 Connection of DUT for measuring the input impedance Test Check input impedance of sensor for compliance with limits of test report 1165 2286 82 1 9 E 1 Quick Test R amp S FSH Z1 Z18 Test Report Quick test Power Sensor R amp S FSH Z1 Stock number 1155 4505 02 Names RATS Serial number DEUCE
8. host is formed by connector X1 on the digital board In addition to the four conductors for the serial interface and power supply the sensor cable contains two pairs of wires for the USB interface The connection to the analog board is established by press in connector X2 The digital board contains two DC DC converters that generate the voltages 3 3 V and 1 75 V for the microcontroller core from the 5 V operating voltage 1165 2286 82 3 3 E 2 Module Replacement R amp S FSH Z1 Z18 Module Replacement The following section describes how to exchange the plastic shell halves and how to replace the connecting cable If one of the electronic modules microwave detector analog board or digital board is defective the sensor has to be sent to Rohde amp Schwarz Central Service for repair Caution e Observe the safety instructions at the beginning of this manual e To avoid damaging electronic components the instrument should only be opened on a workplace protected against electrostatic discharges Wisi erspi pura The following methods can be used separately or combined to Ee ensure protection against electrostatic discharges e Anti static wrist strap with grounding cable ED uino ground e Conductive flooring with foot strap A Ground connection of operational site pes Heel strap Floor mat Tools Required Torx screwdriver Size T8 Thread M 2 5 N15 Note
9. the sensor Table 1 4 and the linearity uncertainty of the calibration system It is recommended to combine both uncertainties according to the RSS method square root based on the sum of squares and to use the extended combined uncertainty as the test limit Table 1 4 Extended linearity uncertainties of Sensors R amp S FSH Z1 and R amp S FSH Z18 at 50 MHz in dB with reference to 0 dBm Test level 30 dBm to 13 dBm 13 dBm to 1 dBm 1 dBm to 23 dBm Uncertainty 0 044 0 022 0 044 Calibration level 30 dBm 25 dBm 20 dBm 15 dBm 10 dBm 5 dBm 0 dBm 5 dBm 10 dBm 15 dBm 20 dBm 23 dBm Procedure e Perform zeroing without power applied e Set autoranging in Sensor Range menu on the R amp S NRP e Set 50 MHz in Frequency menu on the R amp S NRP e Apply level of 0 dBm and activate Relative On in the Measurement menu on the R amp S NRP Use the current measurement value as the reference value Reset Set unit to dB e Set the calibration level and compare the relative level measured by the R amp S NRP with that of the calibration system 1165 2286 82 1 3 E 1 Performance Test with Other Measuring Equipment R amp S FSH Z1 Z18 Checking Matching For these measurements the sensor can be operated with or without the R amp S NRP base unit The measurement procedure depends on the network analyzer used Table 1 5 Max SWR of Sensors R amp S FSH Z1 and R amp S FSH Z18 10 MHz to 30 MHz to
10. 2 Alternatively also two attenuators with a nominal attenuation of 10 dB and 20 dB can be used 1165 2286 82 1 6 E 1 R amp S FSH Z1 Z18 Quick Test Checking the Absolute Measuring Accuracy Test setup Sensor DUT is connected to power reference output Power reference is switched off Setting on R amp S FSH Same as for Checking Zeroing Test Display value is within the limits of test report Checking the Linearity 3 Signalgenerator 4 Stufenabschwacher DUT 1 R amp S FSH3 Fig 1 1 Test setup for checking the linearity bersetzung zur Abbildung Signalgenerator Signal generator Stufenabschw cher Step attenuator Setting on signal generator Frequency 50 MHz output level 10 dBm unmodulated Activate electronic level switchover for the following level settings the position of the mechanical step attenuator remains unchanged compared to the setting of 10 dBm Setting on step attenuator 10 dB Setting on R amp S FSH PRESET MEAS MEASURE POWER SENSOR FREQ 50 MHz TIME LONG UNIT dB REL REF Measurement 0 00 dB must be displayed on R amp S FSH Setting on signal generator 0 dBm 1165 2286 82 1 7 E 1 Quick Test R amp S FSH Z1 Z18 Measurement Read magnitude of level variation AL on R amp S FSH and store approx 10 dB Setting on step attenuator 20 dB Setting on R amp S FSH REF gt REF Measurement 0 00 dB must be
11. A4 FOR POWER SENSOR CABLE W1 1148 2600 00 80 DIGITAL BOARD A1 90 SCREW 7985 ISR M2X10 A4 FOR DIGITAL BOARD A1 1148 2917 00 100 18 GHZ DETECTOR FSH Z18 A3 101 8 GHZ DETECTOR FSH Z1 A3 150 SHIELDING 1137 6068 00 160 SENSOR HOUSING 1137 6022 00 170 SCREW 7985 ISR M2X8 A4 FOR OUTER CASING 1148 2600 00 180 LABEL 1 R amp S FSH Z1 1155 4611 00 190 LABEL 2 R amp S FSH Z1 1155 4628 00 200 LABEL 1 R amp S FSH Z18 1165 1938 00 210 LABEL 2 R amp S FSH Z18 1165 1944 00 ADAPTER FROM FSH TO NRP 1155 4940 00 Note The reference can be found in the drawings 3 3 and 3 4 in Section 3 Available but not maintained in spare parts stock i e delivery time may be longer Spare part not available to be replaced only by Rohde amp Schwarz Central Service 1165 2286 82 5 3 E 1
12. R amp S NRP Z3 or R amp S NRP Z4 e Adapter from FSH to NRP interface R amp S spare part 1155 4940 00 e Operating system Windows 98 Windows ME Windows 2000 or Windows XP e The R amp S NRP Toolkit software must already be installed on your PC e One of the following files must be selected depending on the software component to be updated e lt Type gt _Sensor lt Version Number gt nrp Application e Bootloader_ lt Version Number gt nrp Boot loader 1165 2286 82 4 1 E 1 Installation of New R amp S FSH Z1 Z18 Firmware R amp S FSH Z1 Z18 Preparation gt Connect the power sensor to the PC using the two USB interface adapters gt If a second power sensor or an R amp S NRP is connected to the PC unplug these devices from the PC Shortly afterwards the PC should have identified the new USB hardware and assigned the appropriate driver from the R amp S NRP Toolkit to the power sensor brief message in a small window 1165 2286 82 If you forgot to install the R amp S NRP Toolkit beforehand Windows will try in vain to find a USB driver for the power sensor If this happens the R amp S FSH Zxx is highlighted by a yellow exclamation mark in the Windows device manager In this case proceed as follows Abort the dialog for driver installation Install the R amp S NRP Toolkit Then manually assign the USB driver from the toolkit to the power sensor Go to Control Panel Add Remove Hardware and st
13. TUE EE 2 1 Preliminary Remarks 1 3 oops RODEO ede RA Re 2 1 1165 2286 82 l 2 1 E 1 R amp S FSH Z1 Z18 Contents Section 3 Contents 3 Repair of Sensors R amp S FSH Z1 Z18 sess 3 1 Design and Circuit Description 3 1 Block Diagram ud ep hoe I e idt Iti i edu 3 1 Description of Block Diagrar 12 cde ete eee ectetuer tete teet tenes 3 2 18 GHz Microwave Detector eene nnne nens 3 2 Analog BOArd uir ppp nce itu ea unde tanid ueniunt 3 3 Digital Boafd t dc RENE ae et 3 3 Module Heplacement AAA 3 4 TOOR KE IC EE 3 4 BE ele EE 3 6 Opening and Reassembly Exchange of Plastic Shell Halves ssssss 3 7 Replacement of Sensor Cable WI 3 9 Removing the Sensor Cable entente enses nennen nene 3 9 Installing the Sensor Gable n itt ctr re p ite e e PER dn 3 9 Troubleshooting inoen A ee cete oce ee oed dE ESA pn a 3 10 Overview of Errors Causes and Corrective StepS s sssssnssssrnesrrssetr restir tnnt tn rnnr tn nnne nn nnnn nen 3 11 1165 2286 82 I 3 1 E 1 R amp S FSH Z1 Z18 Contents Section 4 Contents 4 Firmware EE 4 1 Installation of New R amp S FSH Z1 Z18 Firmware 4 1 Hardware and Software Requirements nennen 4 1 Net enecens 4 2 Updating the Application Firmware eese enne nennen nnns 4 3 Updating the Boot Loader uicem e dre pti re ep ded 4 4 1165 2286 82 LA E 1 R amp S FSH Z1 Z18 Content
14. arge dynamic range They include all modules required for analog and digital signal processing and provide fully corrected measured values Communication with the R amp S NRP base unit is handled via a serial interface Moreover the sensor has a USB interface which allows connection to the R amp S NRP base unit via adapter 1155 4940 00 Three detectors are used to obtain the large dynamic range of 90 dB 67 dBm to 23 dBm the input signal is fed unattenuated to path 1 attenuated by 20 dB to path 2 and attenuated by 40 dB to path 3 Sensitivity is highest on path 1 medium on path 2 and lowest on path Depending on the RF input signal level one or two test paths are driven at such a level that these paths can be evaluated A channel is always either driven at a very low level or overdriven The output voltages of the three detectors are amplified and digitized independently of each other to obtain a continuous transition between the test paths The digital values provided by the A D converters undergo various corrections zero offset temperature linearity A weighting algorithm then decides which path or in transition ranges which two paths are to be evaluated and forms a weighted measured value Integration values that represent the average power of the RF signal in a predefined integration period are derived by averaging all sampling values within the integration period The final measured values are the averaged result from several int
15. art the hardware assistant to search for new components Mark the R amp S FSH Zxx in the list of hardware components and complete the driver installation Unplug the power sensor and reconnect it 4 2 E 1 R amp S FSH Z1 Z18 Installation of New R amp S FSH Z1 Z18 Firmware Updating the Application Firmware The update can be started as follows E Either double click the icon of the update file named MRP z21 Messkopf Type Messkopf Version Number gt nrp 1 15 nrp gt Or start R amp S NRP Toolkit Firmware Update from the Windows Start menu gt CS tindate S Parameters The dialog box on the left is displayed next gt If the update was started via the Windows Start menu Help enter the file name of the application firmware in the p Frmware File Firmware File box or search for the name by using the etm ll paese Browse button State Messages Click start to write HrpRirmeare nrp A gt Click the Start button to start the file transfer which is performed automatically BC m EE gt Observe the following e Do not disconnect the power sensor from the PC e Neither connect nor disconnect the power supply for the R amp S NAP Z3 adapter e Exit the Firmware Update program only after it has been completely executed gt During the update the State Messages box informs you of the progress The update has been completed r Firmware File i L
16. egration values 18 GHz Microwave Detector The 18 GHz microwave detector A3 is a hybrid circuit It contains the three test paths and a thermistor for temperature measurement The detector has an RF signal input and a flexstrip connector for output signals control signals and operating voltages with the following assignment Table 3 1 Assignment of flexstrip connector W3 Connector Signal name Description W3 1 CHOP Logic signal for controlling the choppers W3 2 NTC Thermistor connector the other connector of the thermistor is connected to ground CH3 Output of the most insensitive test path Negative operating voltage for the choppers Output of the medium test path Positive operating voltage for the choppers Output of the most sensitive test path The casing of the detector is at ground potential 1165 2286 82 3 2 E 2 R amp S FSH Z1 Z18 Design and Circuit Description Analog Board The analog board A2 contains three test channels of the same design each consisting of an instrumentation amplifier a buffer amplifier and a 14 bit A D converter The instrumentation amplifiers amplify the output difference voltage of the detectors and convert it into a ground referenced voltage The buffer amplifiers are quickly settling operational amplifiers with negative current feedback they isolate the instrumentation amplifiers from the current peaks occurring at the A D converter inputs The A D converters
17. iaise Browse successfully if the message Device lt Type Designation gt lt Serial Number gt is active r State Messages Writing finished appears Checksum OK T Erasing gt You can then use the power sensor for measuring Erasing finished Programming Potential problems Error in the compatibility and consistency checks In this case the update is aborted and an error message is output gt gt Unplug the power sensor reconnect it and start the update again 1165 2286 82 4 3 E 1 Installation of New R amp S FSH Z1 Z18 Firmware R amp S FSH Z1 Z18 Updating the Boot Loader The boot loader update is similar to the update of the application firmware see above FA gt Instead of the application however you must load the new boot loader named PET Bootloader Version Number gt nrp Strictly observe the warnings under Updating the application firmware since the destruction of the boot A loader will generally require a repair of the power sensor Potential problems The power sensor cannot be accessed after the update error message gt Exit the Firmware Update program unplug the power sensor from the PC and reconnect it The power sensor is now ready for operation 1165 2286 82 4 4 E 1 R amp S FSH Z1 Z18 Shipping of Instrument and Ordering of Spare Parts 5 Documents This section provides information for ordering spare parts and contains the relevant documen
18. m defective components These troubleshooting instructions permit malfunctions or errors to be traced down to module level Module replacement and further diagnosis of errors or malfunctions should be carried out by our customer service It is therefore recommended to send the unit to the nearest service center see list of addresses at the beginning of this manual Caution Prior to opening sensor and replacing modules disconnect sensor from base unit R amp S FSH or R amp S NAP or USB adapters R amp S NRP Z3 or R amp S NHP ZA 1165 2286 82 3 10 E 2 R amp S FSH Z1 Z18 Troubleshooting Overview of Errors Causes and Corrective Steps This section provides an overview of possible errors their causes and corrective steps Problems that occur when connecting the sensor or activating the power measurement function on the R amp S FSH base unit e Error The power sensor is not found neither measured values nor error messages are displayed on the R amp S FSH base unit Troubleshooting instruction Unplug sensor from base unit and check male and female connector for damage y Check whether the error also occurs on a different base unit e Error Troubleshooting instruction 0 Load current firmware into sensor and base unit according to section 4 1165 2286 82 3 Potential error source and further corrective steps Defective connection Exchange sensor cable or connector block 8 1157 3287 00
19. nual for Calibration Kit R amp S NRVC SWR measurement has to be carried out on a separate network analyzer Evaluation is performed by Calibration Software Recal Performance Test with Other Measuring Equipment Checking Absolute Measuring Accuracy The sensor contains three measurement paths Individual calibration factors are stored for these measurement paths in the sensor The measurement paths therefore have to be checked separately Table 1 1 and Table 1 2 The maximum permissible error depends on the calibration uncertainties of the sensor Table 1 2 and the uncertainties of the calibration system It is recommended to combine both uncertainties according to the RSS method square root based on the sum of squares and to use the extended combined uncertainty as the test limit To calibrate measurement path 1 the measurement result of measurement path 2 can be used if the calibration system does not provide a calibration power of 10 uW or if its uncertainty is too high In this case only the displayed difference between the two measurement paths will be checked Table 1 3 Table 1 1 Calibration powers Measurement path Power measurement range Calibration power l 1 200 pW to 50 uW 67 dBm to 13 dBm 10 uW 2 20 nW to 5 mW 47 dBm to 7 dBm 1 mW 3 2 uW to 200 mW 27 dBm to 23 dBm 1 mw Table 1 2 Extended calibration uncertainties of Sensors R amp S FSH Z1 Z18 in dB 10 MHz to 20 MHz to 100 MHz t
20. o gt 4 GHz to gt 8 GHz to gt 12 4 GHz to lt 20 MHz lt 100 MHz 4 GHz 8 GHz 12 4 GHz 18 GHz Frequency Measurement path Only R amp S FSH Z18 1 0 056 0 056 0 066 0 083 0 094 0123 2 0 047 0 047 0 057 0 071 0 076 0 099 3 0 048 0 047 0 057 0 072 0 076 0 099 Calibration frequencies 1165 2286 82 10 MHz 15 MHz 20 MHz 30 MHz 50 MHz 100 MHz from 250 MHz to 18 GHz in 250 MHz steps 1 2 E 1 R amp S FSH Z1 Z18 Performance Test with Other Measuring Equipment Table 1 3 Max measurement error in dB between meas paths 1 and 2 at 20 dBm 10 uW 10 MHz to 20 MHz to 100 MHz to gt 4 GHz to 28 GHz to gt 12 4 GHz to Frequency 20 MHz 100 MHz 4 GHz 8 GHz 12 4 GHz 18 GHz Only R amp S FSH Z18 Measurement error 0 045 0 044 0 048 0 054 0 063 Procedure e Perform zeroing without power applied e Set measurement path in Sensor Range menu on the R amp S NRP e Set calibration frequency in Frequency menu on the R amp S NRP e Read power on the R amp S NRP and compare with power value of calibration system At least three measurements are recommended with the sensor set to a different position with respect to the output connector of the calibration system each time Checking the Linearity The linearity check is performed at 50 MHz with autoranging activated The reference power is 1 mW 0 dBm The maximum permissible linearity error depends on the linearity uncertainty of
21. operate on the successive approximation principle They have serial outputs The serial output data streams of the A D converters are subjected to serial parallel conversion in a CPLD and stored in three addressable registers The digital board consecutively addresses and reads out these registers The analog board also comprises an 8 bit D A converter for generating a noise line large scale dither signal that is controlled by the digital board with a sequence of pseudo random digital values The analog board contains a four channel 12 bit A D converter for measuring the substrate temperature of the detector as well as for monitoring the operating voltages 5 V and 1 75 V The 12 bit A D converter is supplied by the 3 3 V operating voltage of the digital board and is thus operational even if the voltage supply of the analog board is defective It is connected to the synchronous serial interface of the digital board and utilizes the MICROWIRE protocol The 5 V operating voltage of the analog board is generated from 3 3 V by a charge pump doubler with subsequent linear regulator The 5 V operating voltage is generated by a switching regulator with a very low output ripple voltage Digital Board The digital board A1 mainly consists of a controller based on a microcontroller Intel StrongARM SA1110 two SRAMs together 1 Mbyte as random access memory and two flash PROMs together 2 Mbyte The interface to the R amp S FSH base unit or another
22. s Section 5 Contents 5 DOGCUmebhls orate aot atibus iit siue tecti en aside fruta 5 1 Shipping of Instrument and Ordering of Spare Parts 5 1 Shipping of Instrument 5 1 Ordering Spare Parte tete deberent iet em peser te ette HE e t neces 5 1 Ordering Replacement Gensors esses enne entree nennen snnt 5 2 Spare P rts oin n A atate teet etm e 5 3 1165 2286 82 l 5 1 E 1 R amp S FSH Z1 Z18 Preliminary Remarks 1 Performance Test Preliminary Remarks Verifying the data sheet specifications for the Power Sensors R amp S FSH Z1 and R amp S FSH Z18 requires a considerable amount of equipment and care Rohde amp Schwarz therefore recommends using the Power Calibration System R amp S NRVC or corresponding equipment that yields the same accuracy The tests are to be carried out directly at the manufacturer its representatives or subsidiaries or at calibration sites that are equipped accordingly A quick test see page 1 5 is recommended for checking the sensor with simple means Test Instructions e The tests are to be performed at an ambient temperature of 20 C to 25 C The DUT should be connected to the activated R amp S NRP base unit for at least 30 minutes before the tests are performed e The test limits used in the following sections are based on the data sheet for the sensors R amp S NRP Z11 and R amp S NRP Z21 which are identical in design and function to the Power Sensors R amp S FSH Z1 and R amp S FSH Z18 The
23. test limits are valid only on the conditions defined in the corresponding test step They are therefore not binding as far as accuracy is concerned but are strictly data sheet information Measuring Equipment and Accessories Item Type of unit Recommended characteristics Recommended R amp S order Application units number 1 Power calibration 10 MHz to 18 GHz R amp S NRVC 1109 0500 02 Absolute measuring oe Calibration level 0 dBm R amp S NRVC B1 1109 1007 02 TTT R amp S SMP02 1035 5005 02 R amp S NRVD 0857 8008 02 2 Linearity 30 dBm to 23 dBm R amp S NRVC B2 1109 1207 02 Linearity librati tem calibration System rest frequency 50 MHz R amp S SMGL 1020 2005 52 3 Network analyzer 10 MHz to 18 GHz R amp S ZVM 1127 8500 60 Matching Test port N connector 4 Controller 1 PC with IEC IEEE bus card NI In connection with R amp S NRVC and R amp S NRVC B2 5 Power meter To connect the DUT R amp S NRP 1143 8500 02 Absolute measuring accuracy 6 Adapter from To connect the DUT to the 1155 4940 00 and linearity R amp S FSH to R amp S R amp S NRP NRP 1 For program controlled calibration in connection with Calibration Kit R amp S NRVC and Calibration Software Recal 1165 2286 82 E 1 Performance Test R amp S FSH Z1 Z18 Performance Test with Calibration Kit NRVC and Calibration Software Recal For detailed information about the performance test refer to the operating ma
24. ther corrective steps Sensor was overloaded indicated by very poor matching and or errors in measurement path 1 Send sensor in for repair microwave detector is defective Other parts of sensor hardware are defective Send sensor in for repair microwave detector or analog board is defective Sensor hardware is probably ok since test limits are only slightly exceeded Perform update of calibration factors in data memory of sensor according to section 2 E 2 R amp S FSH Z1 Z18 Installation of New R amp S FSH Z1 Z18 Firmware 4 Firmware Update Section 4 provides information on the firmware update Descriptions enclosed with the firmware update can be filed here Installation of New R amp S FSH Z1 Z18 Firmware The new firmware for the Sensors R amp S FSH Z1 and R amp S FSH Z18 is loaded directly from the USB connector of a PC by means of the program module Firmware Update The program module is part of the R amp S NRP Toolkit which is used to update the boot loader and the application firmware The R amp S NRP Toolkit can be ordered on request from your nearest Rohde amp Schwarz subsidiary Two adapters are required for the update see Hardware and Software Requirements Hardware and Software Requirements The system requirements for a firmware update are the same as for the operation of the power sensor on a PC an update via the power meter is not possible PC with free USB port e USB Interface Adapter
25. ts for the Rohde amp Schwarz Power Sensors R amp S FSH Z1 and R amp S FSH Z18 Shipping of Instrument and Ordering of Spare Parts Please contact your Rohde amp Schwarz support center or our spare parts express service if you need to request service repair your equipment or order spare parts and modules The list of Rohde amp Schwarz representatives and the address of our spare parts express service are provided in the front section of this service manual You will need to provide the following information in order for us to respond to your inquiries quickly and accurately and to determine whether the warranty for your instrument is still valid e Instrument model e Serial number e Detailed error description in case of repair e Contact partner for checkbacks Shipping of Instrument When shipping the instrument be sure to provide sufficient mechanical and anti static protection gt Repack the instrument as it was originally packed The antistatic packing foil prevents unintentional electrostatic charging from occurring gt f you do not use the original packaging include sufficient padding to prevent the instrument from slipping inside the package Wrap antistatic packing foil around the instrument to protect it from electrostatic charging Ordering Spare Parts To deliver replacement parts promptly and correctly we need the following information e R amp S stock number refer to the spare part lists in this section
26. ttached by a catch of the body on the RF connector side Slightly bend and unlock the shielding by firmly pressing on the two slim sides and pull it off in the cable direction Reassembly Push the shielding and lock it into the catch of the body Insert the sensor into one of the shell halves and lock the second shell half on the RF connector side and close at the cable connector Attach the shell halves to the body using two screws 170 Catch for locking the shielding Fig 3 3 Opening the sensor 1165 2286 82 3 7 E 2 Module Replacement R amp S FSH Z1 Z18 Caution Observe a torque of 29 Ncm for all screws 1165 2286 82 3 8 E 2 R amp S FSH Z1 Z18 Module Replacement Replacement of Sensor Cable W1 Removing the Sensor Cable Opening the sensor see page 3 7 Undo 6 screws 90 gt Carefully remove digital board A1 from the body gt Unplug sensor cable W1 from digital board For removing sensor cable W1 undo two screws 60 and remove the cable from the body Installing the Sensor Cable gt Install in the reverse order Ensure that the guide pins of press in connector X2 lock into the corresponding boreholes of the digital board Digital board A1 90 6x A E Viet Fig 3 4 Replacement of sensor cable 1165 2286 82 3 9 E 2 Troubleshooting R amp S FSH Z1 Z18 Troubleshooting Malfunctions may sometimes be due to simple reasons but may also result fro
27. uick Test R amp S FSH Z1 Z18 Measuring Equipment and Accessories Required for the Quick Test Item Type of unit Recommended characteristics Recommended R amp S order Application units number 1 Spectrum To connect the DUT R amp S FSH 145 5850 03 Zeroing analyzer 1145 5850 13 absolute measuring accuracy linearity 2 Power meter With power reference 1 mW 50 MHz R amp S NRP 1143 8500 02 Absolute measuring Extended uncertainty lt 1 2 R amp S NRP B1 1146 9008 02 accuracy 3 Signal generator 50 MHz Output level 0 dBm to 10 dBm with the option of electronic level setting in this range 4 Step attenuator 50 MHz R amp S RSP 0831 3515 02 Linearity 2 Settings 0 10 20 dB R amp S SMLO3 1090 3000 13 Linearity 5 System 4 pin impedance measurement at Input impedance voltmeter 500 Extended measurement uncertainty 0 2 Q 6 Adapter BNC plug to 4 mm sockets 2 pin 0017 6742 00 Input impedance Adapter Input impedance BNC socket to N socket Po Checking Zeroing Test setup Sensor DUT is connected to power reference output of power meter 2 Power reference is switched off Settings on R amp S FSH PRESET MEAS MEASURE POWER SENSOR UNIT dBm FREQ 50 MHz TIME LONG ZERO CONTINUE Test Message Power Sensor Zero OK Display value is within limits of test report
28. y To ensure that the measuring accuracy corresponds to the data sheet values after the adjustment the calibration system must not have any inaccuracies that are higher than those given in the table below Table 2 1 Tues of power calibration system at 0 dBm in dB including mismatch 10 MHz to 20 MHz to 100 MHz to gt 4 GHz to gt 8 GHz to 212 4 GHz to Frequency 20 MHz 100 MHz 4 GHz 8 GHz 12 4 GHz 18 GHz Only R amp S cum Z18 0 065 0 07 For further details refer to the operating manual for the Calibration Kit R amp S NRVC or the online help for the Recal program 1165 2286 82 2 1 E 1 R amp S FSH Z1 Z18 Design and Circuit Description 3 Repair of Sensors R amp S FSH Z1 Z18 This section describes the design and simple measures for repairing and determining faults as well as the replacement of modules The firmware update is explained in section 4 of this service manual Design and Circuit Description Block Diagram A3 A2 j A1 FSH Z1 ANALOG BOARD DIGITAL BOARD 8GHz DETECTOR 1137 6900 02 i 1137 6845 02 1138 3085 02 i FSH Z18 18GHz DETECTOR 1137 6080 02 Fig 3 1 Block diagram of Sensors R amp S FSH Z1 and R amp S FSH Z18 1165 2286 82 3 1 E 2 Design and Circuit Description R amp S FSH Z1 Z18 Description of Block Diagram The Sensors R amp S FSH Z1 and R amp S FSH Z18 can determine the average power of almost any modulated RF signal over a l
Download Pdf Manuals
Related Search