Rohde & Schwarz SMB100A Service Manual
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Rohde & Schwarz SMB100A Service Manual

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Service Manual
Signal Generator
R&S SMB100A
1406.6000k02
Test & Measurement
1407.0806.82-07-
1

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  • Page 1 Service Manual Signal Generator R&S SMB100A 1406.6000k02 Test & Measurement 1407.0806.82-07-...
  • Page 2 Dear Customer, throughout this manual, the Signal Generator R&S® SMB100A is abbreviated as R&S SMB. R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG. Trade names are trademarks of the owners. 1407.0806.82-07-...
  • Page 3 Basic Safety Instructions Always read through and comply with the following safety instructions! All plants and locations of the Rohde & Schwarz group of companies make every effort to keep the safety standards of our products up to date and to offer our customers the highest possible degree of safety. Our products and the auxiliary equipment they require are designed, built and tested in accordance with the safety standards that apply in each case.
  • Page 4 Basic Safety Instructions Symbol Meaning Symbol Meaning Caution ! Hot surface Alternating current (AC) Protective conductor terminal Direct/alternating current (DC/AC) To identify any terminal which is intended for connection to an external conductor for protection against electric shock in case of a fault, or the terminal of a protective earth Earth (Ground) Class II Equipment...
  • Page 5 Basic Safety Instructions Operating states and operating positions The product may be operated only under the operating conditions and in the positions specified by the manufacturer, without the product's ventilation being obstructed. If the manufacturer's specifications are not observed, this can result in electric shock, fire and/or serious personal injury or death. Applicable local or national safety regulations and rules for the prevention of accidents must be observed in all work performed.

  • Page 6: Re E

    Basic Safety Instructions 6. The product may be operated only from TN/TT supply networks fuse-protected with max. 16 A (higher fuse only after consulting with the Rohde & Schwarz group of companies). 7. Do not insert the plug into sockets that are dusty or dirty. Insert the plug firmly and all the way into the socket provided for this purpose.
  • Page 7 Basic Safety Instructions 2. Before you move or transport the product, read and observe the section titled "Transport". 3. As with all industrially manufactured goods, the use of substances that induce an allergic reaction (allergens) such as nickel cannot be generally excluded. If you develop an allergic reaction (such as a skin rash, frequent sneezing, red eyes or respiratory difficulties) when using a Rohde &...
  • Page 8 Basic Safety Instructions 2. Adjustments, replacement of parts, maintenance and repair may be performed only by electrical experts authorized by Rohde & Schwarz. Only original parts may be used for replacing parts relevant to safety (e.g. power switches, power transformers, fuses). A safety test must always be performed after parts relevant to safety have been replaced (visual inspection, protective conductor test, insulation resistance measurement, leakage current measurement, functional test).
  • Page 9 Instrucciones de seguridad elementales Waste disposal/Environmental protection 1. Specially marked equipment has a battery or accumulator that must not be disposed of with unsorted municipal waste, but must be collected separately. It may only be disposed of at a suitable collection point or via a Rohde &...
  • Page 10 Instrucciones de seguridad elementales Se parte del uso correcto del producto para los fines definidos si el producto es utilizado conforme a las indicaciones de la correspondiente documentación del producto y dentro del margen de rendimiento definido (ver hoja de datos, documentación, informaciones de seguridad que siguen). El uso del producto hace necesarios conocimientos técnicos y ciertos conocimientos del idioma inglés.
  • Page 11 Instrucciones de seguridad elementales Símbolo Significado Símbolo Significado Aviso: Cuidado en el manejo de dispositivos Distintivo de la UE para la eliminación por sensibles a la electrostática (ESD) separado de dispositivos eléctricos y electrónicos Más información en la sección "Eliminación/protección del medio ambiente", punto 2.
  • Page 12 Instrucciones de seguridad elementales 1. Si no se convino de otra manera, es para los productos Rohde & Schwarz válido lo que sigue: como posición de funcionamiento se define por principio la posición con el suelo de la caja para abajo, modo de protección IP 2X, uso solamente en estancias interiores, utilización hasta 2000 m sobre el nivel del mar, transporte hasta 4500 m sobre el nivel del mar.
  • Page 13 Instrucciones de seguridad elementales 6. Solamente está permitido el funcionamiento en redes de alimentación TN/TT aseguradas con fusibles de 16 A como máximo (utilización de fusibles de mayor amperaje solo previa consulta con el grupo de empresas Rohde & Schwarz). 7.
  • Page 14 Instrucciones de seguridad elementales Funcionamiento 1. El uso del producto requiere instrucciones especiales y una alta concentración durante el manejo. Debe asegurarse que las personas que manejen el producto estén a la altura de los requerimientos necesarios en cuanto a aptitudes físicas, psíquicas y emocionales, ya que de otra manera no se pueden excluir lesiones o daños de objetos.
  • Page 15 Instrucciones de seguridad elementales Reparación y mantenimiento 1. El producto solamente debe ser abierto por personal especializado con autorización para ello. Antes de manipular el producto o abrirlo, es obligatorio desconectarlo de la tensión de alimentación, para evitar toda posibilidad de choque eléctrico. 2.
  • Page 16 Instrucciones de seguridad elementales 2. Las asas instaladas en los productos sirven solamente de ayuda para el transporte del producto por personas. Por eso no está permitido utilizar las asas para la sujeción en o sobre medios de transporte como p. ej. grúas, carretillas elevadoras de horquilla, carros etc. Es responsabilidad suya fijar los productos de manera segura a los medios de transporte o elevación.
  • Page 17 Instructions - Instrucciones Instructions for Electrostatic Discharge Protection Risk of damaging electronic components To avoid damage of electronic components, the operational site must be protected against electrostatic discharge (ESD). Wrist strap with cord Floor mat Heel strap Ground connection of operational site The following two methods of ESD protection may be used together or separately: , Wrist strap with cord to ground connection...
  • Page 18 Instructions - Instrucciones Instrucciones para la protección contra descargas electroestáticas Riesgo de avería de los componentes electrónicos Para evitar averías en los componentes electrónicos, el área de trabajo tiene que estar protegido contra descargas electroestáticas ESD (elec- trostatic discharge). Muñequera con cordón Estera Talonera Conexión a tierra del...
  • Page 19 Procedure in Case of Service and Ordering of Spare Parts This section contains information on shipping an instrument to your service center and ordering spare parts. Please contact your local Rohde & Schwarz service center if you need service or repair work of your equipment or to order spare parts.
  • Page 20 Ordering Spare Parts To deliver spare parts promptly and correctly, we need the following information: ● Stock number (see list of spare parts in chapter "Documents") ● Designation ● Component number according to list of spare parts ● Number of pieces ●...
  • Page 21 R&S SMB Chapter Overview Chapter Overview Index Basic Safety Instructions Procedure in Case of Service and Ordering of Spare Parts Chapter 1: Performance Test Chapter 2: Procedures after Module Replacement Chapter 3: Repair Chapter 4: Software Update / Installing Options Chapter 5: Documents 1407.0806.82...

  • Page 22: Table Of Contents

    R&S SMB Index Index Phase noise Test assembly ............1.4 Power cables ..............5.2 Pulse modulation Test procedure ..........1.44, 1.58 Adjustments ..............2.1 Amplitude modulation Test procedure..........1.31, 1.36 Rated characteristics Checking ..............1.1 Test procedures............1.8 Reference frequency Boot problems Test procedure ............1.8 Troubleshooting .............
  • Page 23 R&S SMB Contents "Performance Test" Contents - Chapter 1 "Performance Test" 1 Checking the Rated Characteristics ..................1.1 Measuring Equipment and Accessories ..................1.1 Test Assemblies ..........................1.3 Standard Test Assembly for Analog Modulations ..............1.3 Test Assembly for Pulse Modulation ..................1.3 Test Assembly for Residual AM ....................1.4 Test Assembly for SSB Phase Noise and Jitter ...............1.4 Test Assembly for Output Impedance (VSWR) ...............1.5 Test Assembly for Setting Time ....................1.5...

  • Page 24: Checking The Rated Characteristics

    1 Hz to RF resolution 0.1 Hz (included in spectrum analyzer item 18) Reference source for SSB Identical generator as DUT or R&S SMB100A with suited 1406.6000.02 noise measurements generator with at least 10 dB frequency option lower SSB noise as DUT Reference Synthesizer or 1158.2878...
  • Page 25 R&S SMB Item Type of Instrument Required Characteristics Suitable Instrument R&S Order No. Pulse generator Pulse repetition frequency at least R&S SMB100A equipped with 10 kHz option K23 or R&S SMA100A AC/DC voltmeter 10 Hz to 10 MHz R&S URE3 350.5315.03...

  • Page 26: Test Assemblies

    R&S SMB Test Assemblies Test Assemblies Standard Test Assembly for Analog Modulations Test equipment RF analyzer (Table 1-1, item 18) Signal generator (Table 1-1, item 5) Test setup The RF analyzer is used as a modulation analyzer. The signal generator is used as modulation source in case of external modulation.

  • Page 27: Test Assembly For Residual

    Test Assemblies R&S SMB Test Assembly for Residual AM Test equipment RF analyzer (Table 1-1, item 18) Zero Bias Schottky Detector (Table 1-1, item 20) Low Noise Preamplifier 10 Hz – 30kHz, >30dB Gain (Table 1-1, item 9) 10 MHz Ref. Test setup Analyzer Detector...

  • Page 28: Test Assembly For Output Impedance (Vswr)

    R&S SMB Test Assemblies Test Assembly for Output Impedance (VSWR) Test equipment VSWR bridge (Table 1-1, item 10), Second signal generator (Table 1-1, item 5) Spectrum analyzer (Table 1-1, item 18) Test setup 2nd RF 6 dB OUTPUT COUPLED INPUT 10 MHz Ref.

  • Page 29: Test Assembly For Stereo/Rds Coder (Option R&S Smb-B5)

    Test Assemblies R&S SMB Test Assembly for Stereo/RDS Coder (Option R&S SMB-B5) Test equipment Modulation analyzer (Table 1-1, item 21), Audio Analyzer (Table 1-1, item 22), RDS Decoder (Table 1-1, item 23) Test setup Audio L, R Analog L, R, S/P DIF 1407.0806.82...

  • Page 30: Preparation, Recommended Test Frequencies And Levels

    R&S SMB Preparation, Recommended Test Frequencies and Levels Preparation, Recommended Test Frequencies and Levels To ensure proper conditions for the performance test and prevent setting errors, the instrument must be prepared as follows: • Allow for a minimum warm-up time of 30 minutes at ambient temperature. •...

  • Page 31: Test Procedures

    Test Procedures R&S SMB Test Procedures Reference Frequency Output of Internal Reference Important: Allow the DUT to warm up for at least 2 hours before the measurement. Test equipment Frequency counter (Table 1-1, item 1) Test setup Connect a calibrated frequency counter to the REF OUT output (on rear panel).

  • Page 32: Frequency

    R&S SMB Test Procedures Frequency Frequency Setting Test equipment Test method The frequency setting is checked by running the internal synthesizer adjustments to check the frequency overlap of the VCOs Measurement Run: Setup Internal Adjustments Adjust Synthesis There must be no error message. Setting Time Test assembly See section...
  • Page 33 Test Procedures R&S SMB Settings on analyzer: - Set the analyzer to the stop frequency Measurement Set the DUT to the start frequency f start Send the stop frequency f from the controller to the DUT. stop The externally triggered analyzer displays the settling curve. The setting time is defined as the time from which on the frequency deviation from the stop frequency is less than the specified deviation in the data sheet.
  • Page 34 R&S SMB Test Procedures Recommended test frequencies Deviation start stop 23.4 MHz 1100 MHz ±110 Hz 46.8 MHz 46.9 MHz ±20 Hz 46.9 MHz 46.8 MHz ±20 Hz 93.7 MHz 93.8 MHz ±20 Hz 93.8 MHz 93.7 MHz ±20 Hz 187.4 MHz 187.6 MHz ±20 Hz...
  • Page 35 Test Procedures R&S SMB Example of Measurement: IFB 200 kHz Marker 1 [T1 ] 38.504081726 Hz 0 Hz 25 dB AQT 5.12 ms 1.337436 ms 1 AP CLRWR -200 -400 -600 -800 Center 750.1 MHz Date: 14.FEB.2008 18:58:23 The marker is set to the time when the trace enters the specified interval of 750.1 MHz ± 75 Hz. The setting time is 1.34 ms.

  • Page 36: Spectral Purity

    R&S SMB Test Procedures Spectral Purity Harmonics Test equipment Spectrum analyzer (Table 1-1, item 18) Test setup Connect the spectrum analyzer to the RF output of the DUT. Synchronize the reference frequencies of analyzer and DUT. Measurement Settings on analyzer: Reference level = 20 dBm, 10 dB/div.
  • Page 37 Test Procedures R&S SMB Nonharmonics Test equipment Same as for harmonics Test setup Same as for harmonics Measurement Setting on analyzer: Reference level = 0 dBm, 10 dB/div. Span 50 Hz, Resolution bandwidth 10 Hz Setting on DUT Level = 0 dBm First the carrier level P is measured at the test frequency f as reference and then the signal level P...
  • Page 38 R&S SMB Test Procedures Non-systematic nonharmonics Measurement Settings on DUT: Test frequencies: 34 MHz, 65.9 MHz, 100 MHz, 143.9 MHz, 264.8 MHz, 529.9 MHz, 1059.9 MHz, 2120.9 MHz, 3000 MHz, 4241.9 MHz Test level 0dBm unmodulated Recommended settings on analyzer: - Max peak detector - Filter Type: FFT - Ref-Level 0 dBm...
  • Page 39 Test Procedures R&S SMB Wideband Noise Test assembly Connect spectrum analyzer to RF socket of the DUT. Test method The carrier power is measured first. Then the center frequency of the analyzer is increased by 10 MHz and the noise power in a small bandwidth is measured.
  • Page 40 R&S SMB Test Procedures Evaluation If the power < P - 0.41 dB noise the inherent noise power of the analyzer can be subtracted: Pnoise Wideband Noise If the power > P 0.41 dB noise the analyzer resolution is not sufficient for a precise measurement. The true result is in such case certainly more than 10 dB below the measured value.
  • Page 41 Test Procedures R&S SMB SSB Phase Noise The SSB phase noise of the DUT can be measured direct if a Phase Noise Test Set is available. An R&S FSUP or any other analyzer with phase noise option is suitable if its own phase noise is at least 6 dB less than the guaranteed DUT Phase noise in the data sheet.
  • Page 42 R&S SMB Test Procedures Measurement Set the levels of the two generators in accordance with the speci- fications of the mixer used. (For the MITEQ-DB0118 mixer set the LO-level to +10 dBm and the RF-level to 0 dBm.) Settings of the DUT: - PM int - PM deviation 0.01 rad - Modulation frequency 19 kHz...
  • Page 43 Test Procedures R&S SMB Example: Two R&S SMB measured against each other RBW 10 Hz Delta 2 [T1 ] -65.02 dB Ref -50 dBm 0 dB AQT 400 ms 1.000000000 kHz Marker 1 [T1 ] -57.72 dBm 19.000000000 kHz 1 SA -100 10 of -110...
  • Page 44 R&S SMB Test Procedures Residual FM Test assembly Connect spectrum analyzer to RF socket of the DUT. Test method The FM demodulator of the analyzer is used to FM-demodulate the CW signal of the DUT. By setting the AF-low-pass and high-pass- filters the RMS value in the desired bandwidth can be measured.
  • Page 45 Test Procedures R&S SMB Example: IFB 2 MHz 0 Hz 30 dB AQT 50 ms 200k 150k 100k 1 AP CLRWR -50k -100k -150k -200k Center 1 GHz 5 ms/ Frequency Modulation Summary Coupling Carrier Offset 45.639 Hz Deviation +peak 12.93 Hz Carrier Power -0.91 dBm...
  • Page 46 R&S SMB Test Procedures Residual AM Test assembly Connect spectrum analyzer to RF socket of the DUT. Test method The FM demodulator of the analyzer is used to AM-demodulate the CW signal of the DUT. By setting the AF-low-pass and high-pass- filters the RMS value in the desired bandwidth can be measured.
  • Page 47 Test Procedures R&S SMB Example: IFB 2 MHz 5 dB AQT 200 ms 1 AP CLRWR Center 1 GHz 20 ms/ Amplitude Modulation Summary Modulation Depth 0.022 % Carrier Power -0.87 dBm Modulation +peak 0.022 % Modulation Frequency --- Hz -peak -0.023 % Sampling Rate...

  • Page 48: Level Data

    R&S SMB Test Procedures Level Data Level Uncertainty Test method The level uncertainty is measured in two steps. First, the frequency response is measured at a fixed level with high frequency resolution. Then the level dependant uncertainty is measured at fixed frequencies over the specified range.
  • Page 49 Test Procedures R&S SMB Test method for low levels Test principle Low levels can only be measured using a frequency selective measurement instrument. Spectrum analyzers with digital IF are best suited for this measurement due to their low linearity error. The absolute accuracy of these analyzers is not sufficient for this measurement.

  • Page 50: Output Impedance Test Assembly

    R&S SMB Test Procedures Output Impedance Test assembly "Test Assembly for Output Impedance (VSWR)" (page 1.5) Test method For the VSWR measurement of a source the effect of the level control must be taken into account. For this purpose, an auxiliary generator is used which transmits a wave with a slightly offset carrier frequency into the DUT.
  • Page 51 Test Procedures R&S SMB Setting Time Test assembly Connect the spectrum analyzer (Table 1-1, item 18) to the RF connector of the DUT. Test method The spectrum analyzer is operated as a fast level meter in zero span. A controller transfers the start and the stop level via the IEC/IEEE bus. The analyzer is triggered by the positive edge on the EOI line of the IEC/IEEE bus.

  • Page 52: Internal Modulation Generator

    R&S SMB Test Procedures Internal Modulation Generator Frequency accuracy The LF-Generator is integrated into an FPGA clocked with the same reference frequency as the synthesizer. Therefore, the LF frequency has the same accuracy as the RF and has not to be measured.
  • Page 53 Test Procedures R&S SMB Recommended test levels for 3 mV, 10 mV, 30 mV, 100 mV, 300 mV, 1 V and 3 V Level Accuracy Measurement of Frequency Settings on DUT: response LF Output menu: LF Output Voltage 1 V set LF Gen Frequency to recommended test frequencies and measure the output level Determine the highest and the lowest level V...

  • Page 54: Amplitude Modulation

    R&S SMB Test Procedures Amplitude Modulation AM Setting Uncertainty Test assembly See section "Standard Test Assembly for Analog Modulations", page 1.3. Measurement of accuracy Settings on DUT: versus modulation depth RF On Frequency 150 MHz Level: 0 dBm Amplitude Modulation On AM Source Internal LF Gen Frequency 1 kHz Settings on analyzer:...
  • Page 55 Test Procedures R&S SMB Measurement of accuracy Settings on DUT: versus RF RF On Frequency recommended test frequencies Level: 0 dBm Amplitude Modulation On AM Source Internal LF Gen Frequency 1 kHz AM Depth 80 % Settings on analyzer: AMPTD REF LEVEL 6 dBm, FREQ CENTER same as DUT...
  • Page 56 R&S SMB Test Procedures AM Distortion Test assembly See section "Standard Test Assembly for Analog Modulations", page 1.3. Measurement Settings on DUT: RF On Level 0 dBm Amplitude Modulation menu: LF Gen Frequency 1 kHz Source Internal AM depth 30%. Settings on R&S FSQ: AMPTD / REF LEVEL 6 dBm, FREQ / CENTER test frequency...
  • Page 57 Test Procedures R&S SMB AM Frequency Response Test assembly See section "Standard Test Assembly for Analog Modulations", page 1.3. Measurement Settings on DUT: RF On Level 0 dBm Amplitude Modulation menu: Source External External Coupling DC AM depth 60%. Settings on R&S FSQ: AMPTD / REF LEVEL 6 dBm FREQ / CENTER test frequency FM DEMOD,...
  • Page 58 R&S SMB Test Procedures Synchronous PhiM with AM Test assembly See section "Standard Test Assembly for Analog Modulations", page 1.3. Measurement Settings on DUT: RF On Level PEP = P 0 dBm Amplitude Modulation menu: LF Gen Frequency 1 kHz Source Internal AM depth 30%.

  • Page 59: Frequency Modulation

    Test Procedures R&S SMB Frequency Modulation Test Methods Test assembly See section "Standard Test Assembly for Analog Modulations", page 1.3. Test Method "FFT • The FM deviation and distortion are determined by digital signal Demodulation (Option FS-K7)" processing in the spectrum analyzer. Settings on R&S FSQ: AMPTD / REF LEVEL test level, FREQ / CENTER test frequency...
  • Page 60 R&S SMB Test Procedures FM Distortion Test Method FFT Demodulation (see chapter "Test ") Measurement Settings on DUT: RF On Level 0 dBm: Frequency Modulation menu: State on FM Source Internal FM Mode Normal LFGen Frequency 2 kHz. Settings on R&S FSQ: DEMOD BW 5 * FM deviation, RANGE / DEVIATION PER DIV 250 kHz, RESULT DISPLAY / FM, AF SPECTRUM,...
  • Page 61 Test Procedures R&S SMB FM Frequency Response Test Method FFT Demodulation (see chapter "Test ") Measurement Settings on DUT: RF On Level 0 dBm Frequency Modulation menu: FM Source External FM Ext Coupling DC FM Mode Normal FM deviation: 1 MHz Setting on the signal generator: The internal LF generator of the signal generator delivers the modulation signal to the external modulation input of the DUT.
  • Page 62 R&S SMB Test Procedures Synchronous AM with FM Test assembly See section "Standard Test Assembly for Analog Modulations", page 1.3. Measurement Settings on DUT: RF On Level 0 dBm Frequency Modulation menu: State on FM Source Internal FM Mode Normal FM deviation 40 kHz LFGen Frequency 1 kHz.
  • Page 63 Test Procedures R&S SMB Carrier Frequency Offset with FM Test assembly See section "Standard Test Assembly for Analog Modulations", page 1.3. Measurement Settings on DUT: RF On Level 0 dBm Frequency 1 GHz Frequency Modulation menu: State on FM Source Internal FM Mode Normal FM deviation 1 MHz LFGen Frequency 10 kHz...

  • Page 64: Phase Modulation

    R&S SMB Test Procedures Phase Modulation PhiM Setting Uncertainty Test Method FFT Demodulation (see chapter "Test "). Measurement Settings on DUT: RF On Level 0 dBm Phase Modulation menu: State on PhiM Source Internal PhiM Mode Normal PhiM Deviation 1 rad LFGen Freq = 1 kHz Settings on spectrum analyzer: see chapter...
  • Page 65 Test Procedures R&S SMB PhiM Distortion Test Method FFT Demodulation (see chapter "Test ") Measurement Settings on DUT: RF On Level 0 dBm Phase Modulation menu: State on PhiM Source Internal PhiM Mode Normal LFGen Frequency 10 kHz Settings on R&S FSQ: see chapter "Test "...
  • Page 66 R&S SMB Test Procedures PhiM Frequency Response Test method FFT Demodulation (see chapter "Test "). Measurement Settings on DUT: RF On Level 0 dBm Phase Modulation menu: PhiM Source External PhiM Ext Coupling DC PhiM Mode Normal PhiM deviation: 2 rad Setting on the signal generator: The internal LF generator of the signal generator delivers the modulation signal to the external modulation input of the DUT.

  • Page 67: Pulse Modulation

    Test Procedures R&S SMB Pulse Modulation ON/OFF Ratio Test equipment Spectrum analyzer (Table 1-1, item 18) Pulse generator (Table 1-1, item 13) Test setup To determine the ON/OFF ratio, connect the spectrum analyzer to the RF output socket of the DUT and let the PULSE EXT input open.
  • Page 68 R&S SMB Test Procedures Rise/ Fall Time Test assembly Test Assembly for Pulse Modulation (see page 1.3) Test method The RF signal is down converted to 0 Hz in phase. Thus, the IF output reproduces the RF amplitude vs. time. Measurement Setting on pulse generator: For adjustment statically high level,...
  • Page 69 Test Procedures R&S SMB Video Crosstalk Test assembly As above for ON/OFF Ratio Measurement Setting on pulse generator: Square wave pulse sequence with a frequency of 100 kHz, TTL level Setting on DUT: RF On Frequency 1 GHz, 6 GHz Level 0 dBm Pulse Modulation State On Settings on the Analyzer...

  • Page 70: Pulse Generator

    R&S SMB Test Procedures Pulse Generator PULSE VIDEO Test equipment Storage oscilloscope (Table 1-1, item 3) with 50V Feed-through termination on input. Test setup Connect the PULSE VIDEO socket on the rear of the DUT to the storage oscilloscope. Measurement Setting on DUT: Pulse Modulation menu: State On...

  • Page 71: Stereo/Rds Coder (Option R&S Smb-B5)

    Test Procedures R&S SMB Stereo/RDS Coder (Option R&S SMB-B5) Frequency Response Test setup DUT RF output connected to Modulation Analyzer RF input, Audio analyzer LF output connected to DUT Stereo L, R input. Test method Measurement of demodulated AF signal by Modulation Analyzer Measurement Setting on DUT: RF On...
  • Page 72 R&S SMB Test Procedures Total Harmonic Distortion and Channel Separation Test setup DUT RF output connected to Modulation Analyzer RF input, Audio Analyzer analog and digital LF output connected to DUT Stereo L, R, S/P DIF input, Modulation Analyzer L, R output connected to Audio Analyzer input.
  • Page 73 Test Procedures R&S SMB Measurement Setting on Modulation Analyzer FMB: DEMODULATION FM-STEREO CHANNEL L (R) NOISE FILTER OFF ABSOLUTE MAN RANGE dBm RANGE 12 dBm AUTO DIST-SINAD Channel separation: First note the level of the AF signal on the UPL in channel 1 as reference, then switch the source to channel 2 and measure level of crosstalk 2 ->...
  • Page 74 R&S SMB Test Procedures Signal to Noise Ratio Test setup DUT RF output connected to Modulation Analyzer RF input, Audio Analyzer analog and digital LF output connected to DUT Stereo L, R, S/P DIF input, Modulation Analyzer L, R output connected to Audio Analyzer input.
  • Page 75 Test Procedures R&S SMB Measurement Setting on Audio Analyzer UPL: FILE: LOAD INSTRUMENT STATE: Mode = Default GEN: FUNCTION: Voltage = 0.707 V ANLR: INSTRUMENT: Channel(s) 1 & 2 INSTRUMENT: Ch1, Ch2 Imped = 600 Ohm FREQ / PHASE: Meas Time = Precision FILTER: CCIR wtd (CCIR unwtd, A Weighting) FUNCTION:Q Pk &...
  • Page 76 R&S SMB Test Procedures MPX, Pilot Tone and RDS Subcarrier Deviation Test setup DUT RF output connected to Modulation Analyzer RF input Test method Measurement of demodulated AF signal by Modulation Analyzer Measurement Setting on DUT: RF On Frequency 66 MHz Level 0 dBm Stereo Modulation menu: State On...
  • Page 77 Test Procedures R&S SMB Preemphasis Test setup DUT RF output connected to Modulation Analyzer RF input Test method Measurement of demodulated AF signal by Modulation Analyzer Measurement Setting on DUT: RF On Frequency 98 MHz Level 0 dBm Stereo Modulation menu: State On FM Deviation 10 kHz Audio Source LF Gen...
  • Page 78 R&S SMB Test Procedures Digital S/P DIF Interface Test setup DUT RF output connected to Modulation Analyzer RF input, Audio Analyzer digital LF output connected to DUT Stereo S/P DIF input, Modulation Analyzer L, R output connected to Audio Analyzer input. Test method Generation of S/P DIF signal by Audio Analyzer, measurement of demodulated AF signal by Modulation Analyzer...
  • Page 79 Test Procedures R&S SMB Measurement Read the respective audio frequency on left and right channel from the Modulation Analyzer. Check the result Read the respective MPX deviation of the left and right audio signal from the Modulation Analyzer. 1407.0806.82 1.56...
  • Page 80 R&S SMB Test Procedures RDS Function Test setup DUT RF output connected to Modulation Analyzer RF input. Modulation Analyzer AF output connected to RDS decoder MPX input. Test method Demodulation of FM signal signal by Modulation Analyzer, decoding of multiplex signal by RDS decoder. Measurement Setting on DUT: RF On...

  • Page 81: Hardware Signals

    Test Procedures R&S SMB Hardware Signals SIGNAL VALID Test equipment Spectrum analyzer (Table 1-1, item 18) Test setup Apply connection from the SIGNAL VALID socket on the rear of the DUT to external trigger input of the spectrum analyzer. The function of the Signal is tested by triggering the spectrum Test method analyzer.
  • Page 82 Model: R&S SMB100A Material number: ..........Serial number: Asset Nr.: ......... Firmware version: ..........Test software version: S/N: ........... Signal Generator R&S SMB100A Service Manual, Reference: 1407.0806.82-06 Environmental conditions: ................Responsible: ................Internal adjustments successful ? ..Installed Options: .......................
  • Page 83 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 2 of 50 Calibration certificate no. Equipment Type Manufacturer Model Serial number Firmware Spectrum Analyzer Rohde&Schwarz FSUP-50 100028/050...
  • Page 84 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 3 of 50 Calibration certificate no. Summary Read SMB instrument data PASS Internal adjustments SKIPPED Reference output and input SKIPPED Frequency Setting Time SKIPPED Level Setting Time...
  • Page 85 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 4 of 50 Calibration certificate no. Internal Adjustments Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value Synthesis Adjustment Setup -> Internal Adjustments ->...
  • Page 86 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 5 of 50 Calibration certificate no. Reference Frequency Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value Reference Frequency Page 1.8 Frequency 9999995.0...
  • Page 87 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 6 of 50 Calibration certificate no. Frequency Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value SettingTime Page 1.9 ALC AUTO 23.4 MHz...
  • Page 88 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 7 of 50 Calibration certificate no. Spectral Purity Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value Harmonics Page 1.13 1 MHz Reference -30.0...
  • Page 89 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 8 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 1501 MHz Reference -30.0 -30.0 2001 MHz Reference -30.0...
  • Page 90 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 9 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value Non-systematic Page 1.15 Nonharmonics 34 MHz, 40 MHz span -70.0...
  • Page 91 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 10 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 1501 MHz -142.0 2200 MHz -142.0 3200 MHz -142.0...
  • Page 92 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 11 of 50 Calibration certificate no. Level Data Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value Level Uncertainty Page 1.25...
  • Page 93 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 12 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 612.5 MHz -0.50 0.50 0.02 637.5 MHz -0.50...
  • Page 94 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 13 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 1537.5 MHz -0.50 0.50 0.02 1562.5 MHz -0.50...
  • Page 95 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 14 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 2462.5 MHz -0.50 0.50 0.02 2487.5 MHz -0.50...
  • Page 96 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 15 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 3387.5 MHz -0.90 0.90 0.02 3412.5 MHz -0.90...
  • Page 97 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 16 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 4312.5 MHz -0.90 0.90 0.02 4337.5 MHz -0.90...
  • Page 98 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 17 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 5237.5 MHz -0.90 0.90 0.02 5262.5 MHz -0.90...
  • Page 99 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 18 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value ALC S&H, 13 dBm 200 kHz -1.00...
  • Page 100 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 19 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value -107 dBm -0.50 0.50 0.02 -112 dBm -0.50...
  • Page 101 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 20 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value ALC AUTO, 1087.5 MHz 18 dBm -0.50...
  • Page 102 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 21 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value ALC AUTO, 2187.5 MHz 18 dBm -0.50...
  • Page 103 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 22 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value ALC AUTO, 3187.5 MHz 18 dBm -0.90...
  • Page 104 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 23 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value ALC AUTO, 4012.5 MHz 18 dBm -0.90...
  • Page 105 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 24 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value ALC AUTO, 5012.5 MHz 18 dBm -0.90...
  • Page 106 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 25 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value ALC AUTO, 5987.5 MHz 18 dBm -0.90...
  • Page 107 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 26 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value Output Impedance Page 1.27 2 dBm 200 kHz 1.80...
  • Page 108 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 27 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 1700 MHz 1.80 0.10 1750 MHz 1.80...
  • Page 109 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 28 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 3550 MHz 1.80 0.10 3600 MHz 1.80...
  • Page 110 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 29 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 5400 MHz 1.80 0.10 5450 MHz 1.80...
  • Page 111 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 30 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 1100 MHz 1.80 0.10 1150 MHz 1.80...
  • Page 112 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 31 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 2950 MHz 1.80 0.10 3000 MHz 1.80...
  • Page 113 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 32 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 4800 MHz 1.80 0.10 4850 MHz 1.80...
  • Page 114 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 33 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 2200 MHz, -5 dBm 2.50 0.02 3200 MHz, 18 dBm 2.50...
  • Page 115 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 34 of 50 Calibration certificate no. Internal Modulation Generator Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value Distortions Page 1.29 1 kHz 0.10...
  • Page 116 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 35 of 50 Calibration certificate no. Amplitude Modulation Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value AM Setting Uncertainty Page 1.31...
  • Page 117 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 36 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value AM Distortion Page 1.33 30 %, P 100 kHz 0.25...
  • Page 118 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 37 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value AM Frequency Page 1.34 Response Extern DC, 60 %:...
  • Page 119 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 38 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 2200 MHz 10 Hz 0.000 100 Hz 0.000...
  • Page 120 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 39 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value Intern, 60 %: 1000 MHz 10 Hz 0.000...
  • Page 121 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 40 of 50 Calibration certificate no. Frequency Modulation Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value FM Setting Uncertainty Page 1.36...
  • Page 122 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 41 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 100 Hz 0.000 200 Hz 0.000 500 Hz 0.000...
  • Page 123 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 42 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 375.1 MHz 1 kHz 0.000 2 kHz 0.000...
  • Page 124 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 43 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 750 MHz 1 kHz 0.000 2 kHz 0.000...
  • Page 125 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 44 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value Normal mode Intern 500 MHz 1 kHz 0.000...
  • Page 126 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 45 of 50 Calibration certificate no. Phase Modulation Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value PhiM Setting Page 1.41...
  • Page 127 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 46 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value High deviation mode 10 rad 375.1 MHz 0.200...
  • Page 128 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 47 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 5 kHz 0.000 10 kHz 0.000 20 kHz 0.000...
  • Page 129 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 48 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value 625 MHz 1 kHz 0.000 2 kHz 0.000...
  • Page 130 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 49 of 50 Calibration certificate no. Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value High deviation mode Extern AC 500 MHz 1 kHz 0.000...
  • Page 131 Model SMB100A Serial no. 100063 Item Signal Generator Order no. 1406.6000k03 Cal. date 2015-04-16 Page 50 of 50 Calibration certificate no. Pulse Modulation Characteristics Included in Specified min. Measured Specified Unit Uncert. value value max. value On/Off Ratio Page 1.44 5 MHz 80.00...
  • Page 132 R&S SMB Contents – Procedures after Module Replacement Contents - Chapter 2 "Procedures after Module Replacement" 2 Procedures after Module Replacement ................2.1 Procedures after Replacing the Lithium Battery................2.2 Procedures after Replacing the Basis Board ................2.2 Adjustments ............................2.2 Internal Adjustments ........................2.2 Adjustments of the Complete Unit....................2.2 External Adjustments Requiring Measurement Equipment .............2.2 External Level Correction ......................2.3...

  • Page 133: Procedures After Module Replacement

    R&S SMB Procedures after Module Replacement 2 Procedures after Module Replacement This chapter describes all necessary measures to restore the performance of the R&S SMB after module replacement. There are no manual adjustments to be performed. Internal and external adjustment routines are implemented for this purpose.

  • Page 134: Procedures After Replacing The Lithium Battery

    Procedures after Module Replacement R&S SMB Procedures after Replacing the Lithium Battery 1. Connect an USB keyboard to the R&S SMB. 2. Switch on the R&S SMB. The operating system (LINUX) and the R&S SMB firmware will start. 3. Set correct date and time at R&S SMB setup menu. Procedures after Replacing the Basis Board Required equipment USB Memory Stick (at least 128 MB)

  • Page 135: External Level Correction

    R&S SMB Procedures after Module Replacement External Level Correction External level correction measures output power over frequency and level and stores the correction values inside the instrument to maintain level accuracy. The R&S SMB provides a build in measuring procedure for external level correction. Risk of damage to the power sensor NOTICE Power sensor NRP-Z91 can be damaged when being exposed to R&S SMBs...

  • Page 136: Adjustment Of Internal Reference Frequency

    Procedures after Module Replacement R&S SMB Adjustment of internal Reference Frequency The frequency accuracy of the synthesizer is determined (set to internal reference) by a 200 MHz VTCXO or when the Option R&S SMB-B1 is fitted with a highly stable OCXO that is set to a calibrated frequency standard at the R&S factory.

  • Page 137: Adjustment Of Stereo Coder Module

    R&S SMB Procedures after Module Replacement Adjustment of Stereo Coder Module The analog audio signal path gain and offset can be adjusted by performing the internal adjustment (Setup/Internal Adjustment/Adjust All). For adjustment of the digital audio signal path, an additional S/P DIF source is required: Important: Allow the DUT to warm up for at least 20 minutes before adjustment is executed External S/P DIF source Test equipment...
  • Page 138 R&S SMB Contents – Repair Contents – Chapter 3 "Repair" 3 Repair ..............................3.1 Instrument Design and Function Description ................3.1 RF Board ..........................3.2 Implemented functions....................3.2 Internal and external 10 MHz reference ................3.2 TCXO 200 MHz crystal oscillator ...................3.2 RF Synthesizer/ DDS module ..................3.3 Harmonics filters ......................3.3 LF generator ........................3.3 Pulse Generator and Pulse Modulator................3.3...
  • Page 139 Contents – Repair R&S SMB Troubleshooting @ Reference Oscillator option R&S SMB-B1..........3.30 Input and Output Signals .....................3.30 Error Messages Concerning the Reference Oscillator Module ........3.31 Frequency Error, Reference Oscillator Adjustment .............3.31 Troubleshooting @ Stereo/RDS Coder option R&S SMB-B5 ..........3.32 Input and Output Signals .....................3.32 Error Messages concerning the Stereo/RDS Coder module........3.34 Stereo/RDS Coder adjustment ..................3.35 Stereo/RDS Coder Faults ....................3.35...

  • Page 140: Repair

    R&S SMB Instrument Design and Function Description 3 Repair Instrument Design and Function Description A schematic of the signal generator's design is presented below as block diagram at module level The R&S SMB consists of very few main modules and very few connections between these modules. The main units are: •...

  • Page 141: Rf Board

    Instrument Design and Function Description R&S SMB RF Board The RF BOARD contains the complete measuring hardware of the instrument. The RF and LF signals are generated and modulated on the module. The output level is controlled by a level control loop controlling the level before the step attenuator.

  • Page 142: Rf Synthesizer/ Dds Module

    R&S SMB Instrument Design and Function Description RF Synthesizer/ DDS module The 200 MHz signal of the TCXO provides the system clock for the DDS module. The RF output frequencies from 9 kHz to 23.4375 MHz are generated directly by the DDS. In this mode all the modulation is done fully digital.

  • Page 143: Automatic Level Control

    At the RF output of the RF Board a reverse power protection circuitry detects RF power fed into the RF Board from outside the instrument. To protect the SMB100A against damage a relay disconnects the RF output, when a reverse power of more than approximately 34 dBm is detected. In standby or power off mode this relay is also in off state to protect the RF output of the instrument from damage.

  • Page 144: Switching Regulators

    The diagnostic ADC is used for measuring the voltages in the unit. These voltages are used for internal adjustments and the ALC S&H mode of the SMB100A. Additionally the failure diagnostic of the instrument is carried out by the use of ADC.

  • Page 145: Stereo/Rds Coder Module

    Instrument Design and Function Description R&S SMB Stereo/RDS Coder module For support of FM Stereo modulation an optional Stereo/RDS Coder module can be installed. The Coder accepts analog signals from the external audio input rear connectors or generated by the RF-Board LF Generator.

  • Page 146: Troubleshooting

    R&S SMB Troubleshooting Troubleshooting The purpose of these troubleshooting instructions is to help to trace down malfunctions to board level. The instrument can thus be made ready for use again by means of board replacement. If error tracing doesn’t show clear results, we recommend that you ship your instrument to our experts in the service centers (see address list) for module replacement and further error elimination.

  • Page 147: Switch-On Problems

    Troubleshooting R&S SMB Switch-On Problems The yellow LED on the front panel, next to the ON/OFF Button is directly connected to the Standby Voltage of the power supply (via a resistor on the Basis Board) and is therefore a good indicator of the basic working of the power supply.

  • Page 148: Switch-Off

    R&S SMB Troubleshooting Fig. 3-1 LED, X101 and X112 location on the Basis Board (1406.6600.02) Fig. 3-2 LED, X101 and X112 location on the Basis Board (1406.6700.05) Switch-off Besides pressing the power switch, the instrument can be switched off in three ways. After briefly pressing the ON/OFF button on the front panel, the CPU performs a normal system shutdown and then powers off the power supply via pin 13 of the power supply connector.
  • Page 149 Troubleshooting R&S SMB The instrument can also be switched off by means of the temperature monitoring circuit on the Basis Board. If the temperature sensor on the Basis Board detects an over temperature (e.g. in the event that a fan fails), the power supply is switched off via pin 13 of the power supply connector. It can only be switched on again, after cooling down.

  • Page 150: Fan Does Not Work

    R&S SMB Troubleshooting • Error: Fan does not work Description of error Possible error causes and further steps Fan does not work Disconnect fan and check voltage on BASIS BOARD X116 (fan connector) between pin 1 and 2 (see Fig. 3-3): Rated voltage:8 V …...

  • Page 151: Problems With Booting

    Troubleshooting R&S SMB Problems with Booting • Error: Unit does not start the application After switch-on, the signal generator first runs the Boot Loader. The Boot Loader displays the R&S Logo. The Boot Loader loads the FPGAs on the Basis Board and on the RF Board. After successful initialization of the computer (approx.

  • Page 152: Keyboard And Rotary Knob Test

    R&S SMB Troubleshooting Keyboard and Rotary Knob Test • This utility allows you to check for proper operation of all front panel control elements Normal action Error, possible causes and corrective action Test called with - Check Front Panel… SETUP An image of the front panel appears with gray Note: Be careful with the rotary knob! Turn only keys.

  • Page 153: Troubleshooting With Internal Selftest

    Troubleshooting R&S SMB Troubleshooting with Internal Selftest The internal selftest checks the instrument by setting different internal states and measuring internal diagnostic points. Execute - Selftest- Selftest . The selftest reports the modules failing the test: SETUP To see the details of the selftest open the corresponding branch of the result tree: 1407.0806.82 3.14...

  • Page 154: Troubleshooting With Internal Adjustments

    R&S SMB Troubleshooting Troubleshooting with Internal Adjustments Various internal adjustments are necessary for correct operation of the instrument. The failure of a certain adjustment can shorten troubleshooting considerably. The affected module is the RF Board module or the installed R&S SMB-B5 Stereo/RDS Coder module. Note: Failed internal adjustments can also be queried on the info page ->...

  • Page 155: Instrument Faults

    Troubleshooting R&S SMB Instrument Faults The following table lists R&S SMB Faults. For every fault additional test are described to determine the defective module. Fault Test Action if test fails RF Output Level R&S SMB settings: Check the mating torque of the •...
  • Page 156 R&S SMB Troubleshooting Fault Test Action if test fails Poor Harmonic R&S SMB settings: Most probably the RF Board is • Distortion defective. Check the RF Board Instrument Preset being supplied correct (see • Reference internal page 3.24). • RF on •...
  • Page 157 Troubleshooting R&S SMB Fault Test Action if test fails 10 MHz R&S SMB setting: R&S SMB without Reference • Oscillator R&S SMB-B1: Reference Setup Reference internal Output faulty Most probably the RF Board is Measure 10 MHz reference output signal with defective.
  • Page 158 R&S SMB Troubleshooting Fault Test Action if test fails Amplitude The AM is specified only up to the Peak Most probably the RF Board is Modulation Envelope Power (PEP) noted defective. Check the RF Board Faulty datasheet. The PEP value of an AM signal being supplied correct (see with depth m at setting level P is page 3.24).
  • Page 159 Troubleshooting R&S SMB Fault Test Action if test fails Stereo The FM Stereo multiplex signal is generated If the Internal Stereo Coder Modulation in the Stereo coder module and transferred to Adjustment fails and the Synthesis Faulty the RF Board modulation input. Run Internal Adjustment succeeds, check the Adjustments to ensure the VCOs generating Stereo coder output (see page...

  • Page 160: Troubleshooting - Basis Board Module

    R&S SMB Troubleshooting Troubleshooting – Basis Board Module Supply Voltages Before Troubleshooting on the Basis Board switch the R&S SMB on and measure the supply voltages on its power supply connector (X101, see Fig. 3-5) and compare them to the values specified in the table below.

  • Page 161: Fuses

    Troubleshooting R&S SMB Pin at X101 Test Point Fuse R&S SMB in stand by mode R&S SMB switched On 5…10 +4.7 V … +5.3 V 5…10 +5V_IQ +4.7 V … +5.3 V 3, 4 +12V +12.4 V … +14.2 V 3, 4 +12V_IQ +12.4 V …...
  • Page 162 R&S SMB Troubleshooting blown after two minutes and the display is not working the display is defective. If the RF Board is equipped with the Reference Oscillator B1 remove this unit first (see page 3.57). Now repeat the fuse test by first adding the connection to the RF Board and then adding the Reference Oscillator B1.

  • Page 163: Troubleshooting @ Rf Board Module

    Troubleshooting R&S SMB Troubleshooting B RF Board Module The tests listed below ensure that an assumed error on the RF Board module is not caused by a defective or incorrectly connected cable, incorrect adjustment or another module. Internal Adjustment "Adjust All" A comprehensive test of the module is to run the internal adjustment.

  • Page 164: Control Signals

    R&S SMB Troubleshooting Fig. 3-6 Power Supply and digital interface connector of the RF Board. Control Signals The control signals of the RF Board can be measured at test points near connector X222 (see Fig. 3-7). Signals going to the RF Board are colored red and signals coming from the RF Board are colored blue. Fig.
  • Page 165 Troubleshooting R&S SMB Perform the following settings at the R&S SMB: • Preset • RF on • Unlock Protection Level 2: 147946 • - Test Point Select Test Point DIAG_SMB_RF_LCON SETUP • - Test Point State SETUP Preset the R&S SMB and control the following signals with an Oscilloscope. Oscilloscope settings: •...

  • Page 166: Input And Output Signals

    R&S SMB Troubleshooting Input and Output Signals Connector, Signal name Setting on signal Frequency Level Signal flow system generator X212, SMA RF out RF on 9 kHz to 6 GHz -145 dBm to to N RF connector at front + 30 dBm X215, SMP LFGEN LF out on...

  • Page 167: Warnings Concerning The Rf Board Module

    Troubleshooting R&S SMB Warnings Concerning the RF Board Module Warnings Warning correction “External reference oscillator out of range or Check the external reference input signal. disconnected” If the input signal is correct and the error message is still displayed, change the module. “Output protection tripped”...
  • Page 168 R&S SMB Troubleshooting Frequency Error Error Error correction Internal reference frequency: The frequency accuracy of the synthesizer is determined Frequency error greater than limit (set to internal reference) by a highly stable 200 MHz quartz given in datasheet oscillator that is set to a calibrated frequency standard at the R&S factory.
  • Page 169 Troubleshooting R&S SMB Troubleshooting B Reference Oscillator option R&S SMB-B1 If the frequency Error of the R&S SMB is > 3*10 the Reference Oscillator is defective, change the module. Input and Output Signals The Reference Oscillator has only one Futurbus connector (X1). The Reference Oscillator is plugged into the RF Board (X221 see Fig.

  • Page 170: Error Messages Concerning The Reference Oscillator Module

    R&S SMB Troubleshooting Error Messages Concerning the Reference Oscillator Module Error message Error correction " OCXO 10 MHz oven cold If this message does not disappear after 10 minutes, OCXO is defective, change the module. "Synchronization error on internal Switch the R&S SMB to external Reference and reference"...

  • Page 171: Troubleshooting @ Stereo/Rds Coder Option R&S Smb-B5

    Troubleshooting R&S SMB Troubleshooting B Stereo/RDS Coder option R&S SMB-B5 Input and Output Signals The Stereo/RDS Coder module is connected to the Basis Board via connector X108 and the ribbon cable W108. The cable supports the Stereo Coder power supply, the digital control lines, and the connections for internal audio input and multiplex output signal.
  • Page 172 R&S SMB Troubleshooting Test Point Pin at X108 Remark (Basis Board) STEREO_MPX Analog Stereo multiplex signal to rf-board LF_STEREO Analog modulation signal from rf-board Pin 11 Pin 13 Note: Wire 1 (marked red) of the ribbon cable is connected to pin 34 of X108! Fig.

  • Page 173: Error Messages Concerning The Stereo/Rds Coder Module

    Troubleshooting R&S SMB Error Messages concerning the Stereo/RDS Coder module Error message Error correction "Stereo Coder not ready. Please reboot Restart R&S SMB. If error persists, most probably the R&S SMB.” Stereo Coder module or the ribbon cable W108 is defective.

  • Page 174: Stereo/Rds Coder Adjustment

    R&S SMB Troubleshooting Stereo/RDS Coder adjustment Error Error correction RF carrier frequency is shifted by The RF carrier frequency offset in Stereo mode can be more than 2 kHz when activating internally adjusted. Perform - Internal Adjustments SETUP Stereo modulation mode. - Adjust All.

  • Page 175: Stereo/Rds Coder Signal Path Check

    Troubleshooting R&S SMB Stereo/RDS Coder signal path check Perform the tests from top to bottom of the table. Fault Test Action if test fails Stereo mode Set the Stereo Coder to Most probably the Stereo Coder signal path State On module or the ribbon cable W108 is faulty Audio Source Off...
  • Page 176 R&S SMB Troubleshooting sine wave with an amplitude of 900mVp to 1000 mVp. Set the Stereo Coder to Most probably the Stereo Coder State On module or the ribbon cable W108 is FM Deviation 40 kHz defective. Check the Stereo Coder Audio Source LF Gen being supplied correct (see Mode Stereo R=L...

  • Page 177: Module Replacement

    1407.7800.06 1407.7800.16 Reference Oscillator OCXO R&S SMB-B1 1300.3180.03 1300.3180.03 3.57 A210 3.58 Stereo Coder R&S SMB-B5 A400 1407.3240.00 1407.3240.00 Front Unit R&S SMB100A A300 1406.7507.02 1406.7507.02 3.40 1406.7807.02 1406.7807.02 3.45 Encoder Board A310 1300.3044.02 1300.3044.02 3.5" TFT (QVGA DRGB LCD) 3.44...

  • Page 178: Dismounting The Case

    R&S SMB Module Replacement Dismounting the Case Put the instrument on the front shock mounts. Unscrew the four screws of the rear shock mounts (rear right and rear left) on both sides and take them off. Pull off the case. When mounting the case, take care not to damage or pull off cables! Replacing Fuses NOTICE...

  • Page 179: Replacing The Front Cover And The Front Unit (A300)

    Module Replacement R&S SMB Replacing the Front Cover and the Front Unit (A300) (See chapter 5, drawing 1406.6000.01). Removing the Front Cover (See chapter 5, drawing 1406.7507.01). Switch off the instrument and pull the mains plug. Dismounting the case (see page 3.39). Remove the front shock mounts.
  • Page 180 R&S SMB Module Replacement Disconnect the flex. cables W310, W330 and the flex. switchboard cable. Pull off the front cover towards the front. Remove the knob of the encoder board. Unscrew four countersunk screws (1148.2752.00) in the front frame each at the top and at the bottom.
  • Page 181 Module Replacement R&S SMB Completely remove the front unit with keyboard and TFT display towards the front (front unit 1406.7507.02). Unscrew the four screws. Remove the two nuts. Pull out the RF cable W212 backwards. Pull out the RF cables W214 and W215 forwards. 1407.0806.82 3.42...

  • Page 182: Mounting The Front Unit

    R&S SMB Module Replacement NOTICE Store the RF cables at a safe place. These cables are not components of the front unit. When you mount the cables, ensure their correct position in the front unit. Mounting the Front Unit Place the front unit and fix it with four countersunk screws (1148.2752.00). Reconnect the cables to the RF-board (W212, W214 and W215) and to the basis board (W310, W330 and the flex.

  • Page 183: Replacing The Tft Display (A330), Encoder Board (A310), Flex. Switch Board And Pushbutton Board Set

    Module Replacement R&S SMB Replacing the TFT Display (A330), Encoder Board (A310), Flex. Switch Board and Pushbutton Board Set It is recommended to replace the front unit as a whole. Principally, it is possible to replace the individual components of the front unit (see figure below). (See chapter 5, drawing 1406.7507.01).

  • Page 184: Replacing The Encoder Board

    R&S SMB Module Replacement Replacing the Encoder Board Unscrew two combination screws (1148.3059.00). Replace the encoder board and fix it with two combination screws (1148.3059.00). Replacing the TFT Display, Flex. Switch Board and Pushbutton Board Remove the encoder board. Unscrew the eight combination screws (1148.3059.00) and remove the holding plate (1406.7565.00). The pushbutton board set (1406.7542.00) and the flex.
  • Page 185 Module Replacement R&S SMB NOTICE Risk of damage to the board The ribbon cable connector must be carefully folded up. Open the clips from the display frame (1406.7594.00) and remove the display (1407.3586.00). Replace the powder seal (1406.7588.00) for a new one and clip the new display into the display frame.

  • Page 186: Replacing The Basis Board (A100)

    R&S SMB Module Replacement Replacing the Basis Board (A100) (See chapter 5, drawing 1406.6000.01). Note: Different Basis Boards, order no. 1406.6600.02 or 1406.6700.02. Removing the Basis Board Switch off the instrument and pull the mains plug. Dismounting the case (see page 3.39). Unfasten lock of fan cable Disconnect the fan cable from X116 and the power supply cable from X101 (Remove the plastic tie before disconnect the cable).

  • Page 187: Installing The Basis Board

    Module Replacement R&S SMB Installing the Basis Board Insert the SIM Card into the SIM Card holder on the new basis board (see page 3.50) Place the screw angle (1090.3230.00) on the IEC Connector. To insert the new basis board, proceed in the reverse order. Connect all cables (fan, power supply) and also the flex.

  • Page 188: Replacing The Battery (G1)

    R&S SMB Module Replacement Replacing the Battery (G1) The lithium battery is accommodated on the basis board. CAUTION Danger of injury Lithium batteries must not be exposed to high temperatures or fire. Keep away from children. If the battery is replaced improperly, there is danger of explosion. Only replace the battery by R&S type (see also Modules”, page 3.38).

  • Page 189: Replacing The Sim Card

    Module Replacement R&S SMB Replacing the SIM Card When changing the basis board, you have to remove the SIM card. NOTICE The SIM card is part of your instrument and will not be replaced by Rohde & Schwarz if lost. Therefore, always keep the SIM card with you. Remove the basis board (see 3.47).
  • Page 190 R&S SMB Module Replacement The latch of the SIM card holder is open. Flip the SIM card holder upward and remove the SIM card. To install the SIM card, proceed in the reverse order. 1407.0806.82 3.51...

  • Page 191: Replacing The Rf-Board (A200)

    Module Replacement R&S SMB Replacing the RF-Board (A200) (See chapter 5, drawing 1406.6000.01 D and spareparts list 1406.6030.01 ST). Removing the RF-Board Note: If the R&S SMB-B1 (Reference Oscillator) option is installed, uninstall this option first (see Replacing the Reference Oscillator Option R&S SMB-B1 (A210)).

  • Page 192: Installing The Rf-Board

    R&S SMB Module Replacement Remove the six nuts of the BNC-connectors. Undo five screws (1148.2946.00) on the RF-board and remove the board. NOTICE When ordering spare and replacement modules: Spare modules of the RF board are always delivered with the ending number .13 for .03 and the number .16 for .06 (see label).

  • Page 193: Replacing The Power Supply (A50)

    Module Replacement R&S SMB Replacing the Power Supply (A50) (See chapter 5, drawing 1406.6000.01). Removing the Power Supply Switch off the instrument and pull the mains plug. Dismounting the case (see page 3.39). Remove connector X101 from the basis board. Open the flat cable holder and unscrew three combination screws (0041.1653.00) on the back of the instrument.

  • Page 194: Installing The Power Supply

    R&S SMB Module Replacement Installing the Power Supply Place the power supply in the instrument and screw it with two combination screws at the power supply trough. Fix the power supply at the back of the instrument with three combination screws. Fix the wires with the flat cable holder and connect them at X101 on the basis board.

  • Page 195: Replacing The Fan Unit (E1)

    Module Replacement R&S SMB Replacing the Fan Unit (E1) (See chapter 5, drawing 1406.6000.01). Switch off the instrument and pull the mains plug. Dismounting the case (see page 3.39). Disconnect the fan at X 116 and push the rubber pins (1146.2161.00) through the trough. Install the new fan and proceed in the reverse order.

  • Page 196: Replacing The Reference Oscillator Option R&S Smb-B1 (A210)

    R&S SMB Module Replacement Replacing the Reference Oscillator Option R&S SMB-B1 (A210) Unscrew the three screws (0041.1653.00) fixing the option. Carefully remove the reference oscillator (1300.3180.03). Installing the Reference Oscillator Carefully plug in the reference oscillator as far as possible. Fix the option with three screws.

  • Page 197: Replacing The Stereo/Rds-Coder Option R&S Smb-B5 (A400)

    Module Replacement R&S SMB Replacing the Stereo/RDS-Coder Option R&S SMB-B5 (A400) Removing the Stereo/RDS-Coder Switch off the instrument and pull the mains plug. Dismounting the case (see page 3.39). Unscrew the two screws (A and B) fixing the option. Lift up the option at one side and unlock the three RF-Cables (1407.3334.00) from the RDS Stereo Coder.

  • Page 198: Installing The Stereo/Rds-Coder

    R&S SMB Module Replacement Unlock the four combination screws on the RDS Stereo Coder Board and remove the holding plate (1406.6269.00). Installing the Stereo/RDS-Coder Screw the RDS Stereo-Coder with the holding plate (1406.6269.00) using four combination screws (1148.3059.00), see. Connect the three RF-Cables W401 to W403 (1407.3334.00) with the nuts at the back of the R&S SMB-Frame.
  • Page 199 Module Replacement R&S SMB Connect the Stereo-Coder and the Base Board with the cable W108. Connect the two stereo RF-Cables on the right SMP-Socket. Stereo R on the back of the SMB-Frame to R+ on the Stereo-Coder Board Stereo L on the back of the SMB-Frame to L+ on the Stereo-Coder Board 1407.0806.82 3.60...
  • Page 200 R&S SMB Module Replacement Also connect the S/P DIF cable on the back of the SMB-Frame to the correct SMP-Socket on the Coder-Board. Turn the Stereo/RDS-Coder down to the SMB-Frame and connect it with two screws (screw A: 1148.3059.00, screw B: 1148.3288.00) to the SMB-Frame. 1407.0806.82 3.61...
  • Page 201 R&S SMB Contents - Software Update/Installing Options Contents - Chapter 4 "Software Update/Installing Options" 4 Software Update / Installing Options ..................4.1 Installation of New R&S SMB Firmware ..................4.1 Installing the Options........................4.2 Hardware Options ........................4.2 Software Options........................4.3 1407.0806.82 I-4.1...

  • Page 202: Software Update / Installing Options

    Your R&S SMB is delivered with the latest firmware version available. Firmware updates as well as the Release Notes describing the improvements and modifications are provided on the Internet at the download site of the R&S SMB homepage http://www.rohde-schwarz.com/product/smb100a. This homepage always offers the latest information on your signal generator, e.g. also on changes of the firmware update procedure.

  • Page 203: Installing The Options

    Installing the Options A list of all available R&S SMB options is provided in the data sheet and on the internet http://www.rohde-schwarz.com/product/smb100a. Hardware Options Installation and replacement of hardware options is described in chapter 3 of this service manual.

  • Page 204: Software Options

    R&S SMB Installing the Options Software Options All available software options are already included in the latest firmware. They are ready to operate after they are enabled by means of a key code supplied with the option. Only if the R&S SMB is equipped with an older firmware version, a firmware update prior to enabling the software option may be required.

  • Page 205: Documents

    R&S SMB Contents - Documents Contents - Chapter 5 "Documents" 5 Documents ............................5.1 Spare Parts............................5.1 Available Power Cables ........................5.2 1407.0806.82 I-5.1...

  • Page 206: Spare Parts

    R&S SMB Spare Parts 5 Documents This chapter contains the spare parts list and the documents for the complete R&S SMB unit. For general information about spare parts for our products please refer to the sheet “Procedure in Case of Service and Ordering of Spare Parts”...

  • Page 207: Power Cables

    R&S SMB Available Power Cables Available Power Cables Table 5-1 List of power cables available Stock No. Earthed-contact connector Preferably used in DS 0006.7013.00 BS1363: 1967' 10 A, 250 V Great Britain complying with IEC 83: 1975 standard B2 DS 0006.7020.00 Type 12, 10 A, 250 V Switzerland complying with...
  • Page 208 Spare Parts List...
  • Page 219 Mechanical Drawings...
  • Page 222 Block diagrams...
  • Page 223 RF, 50 Ohm, N Front Panel SMB A300 A310 A320 A330 Front Unit Encoder Flex. Switch- Display board Board QVGA (Farbe) 1406.7820.02 1406.7559.00 1300.3044.02 3585.1400.00 W310 X111 X112 X113 A100 W330 BASIS BOARD 1406.6700.05 A400 SMB-B5 W108 Stereo-Coder 34p. Cable 1407.3205.02 S/P DIF X214...

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