The service manual for the Rohde & Schwarz SWOB III-Z covers the setup and operation of RF demodulator probes, including the use of various probe tips and adapters for measuring RF voltages with minimal loading on the test point. It also provides troubleshooting guidance, such as accessing components by removing the housing for repairs, while noting that defective attenuators cannot be repaired.
Manual Overview
The service manual for the Rohde & Schwarz SWOB III-Z RF Diode Probe provides detailed guidance on troubleshooting, diagnostics, calibration, and board-level adjustments. The manual emphasizes the importance of using the correct probe tips and adapters to ensure accurate measurements with minimal loading on the test point. The RF demodulator probe 241.2116 is equipped with a BNC socket, while the LIN/LOG 241.1910 uses a 5-pin socket. Troubleshooting involves checking for damage from excessive voltage, which can affect the probe’s components. The manual advises removing the housing for access to components if repairs are needed, although the slip-on attenuators are not repairable. Calibration involves using reference signals to compensate for linearity errors in the detector diode, with a secondary diode providing a reference signal to ensure accuracy. The manual provides specifications for frequency range, input impedance, and maximum allowable voltages to guide technicians in maintaining and adjusting the probes for optimal performance.
Quick Issues Covered
- Diagnose linearity errors with LIN/LOG RF diode probe.
- Calibrate using exchangeable probe tips for wide voltage range.
- Repair access by removing M-2 screw and housing.
Overview
The product is an RF demodulator probe designed for measuring RF voltages with minimal loading on the test point. It includes models 241.2116 and 241.1910, equipped with BNC and 5-pin sockets, respectively. The manual covers the characteristics, uses, technical data, and operation instructions for these probes, including details on exchangeable probe tips and accessories for various measurement applications.
Specifications
- Anschluss: 1 m langes Kabel mit BNC-Stecker (241.2116), 1 m langes Kabel an 5-poliger Kleinflanschdose (241.1910)
- Ankopplung der Messstelle: kapazitiv an den Messgleichrichter
- Anwendungsfrequenzbereich: 0,5…400 MHz (241.2116), 0,1…500 MHz (241.1910)
- Eingangskapazität (bei 50 MHz): 2…3 pF (241.2116)
- Eingangswiderstand: bei 50 MHz = 30 kΩ, bei 200 MHz = 10 kΩ (241.2116)
- Maximal zulässige HF-Spannung (Ugrp): 5 V (überlagerte Gleichspannung bis 100 V) (241.2116)
- Minimale Eingangsspannung für volle Bildhöhe: 50 mV (241.2116)
- Ausgangssignal: positive Gleichspannung = 5 mV an 500 Ω für Ugrp 50 mV (241.2116)
- Abmessung (ohne Kabel): 14×100 mm (241.2116), 144×100 mm (241.1910)
- Gewicht: ca. 100 g (beide)
- Eingangsspannungsbereich (Uggp): 2 mV…5 V (241.1910)
- Ausgangsspannung für 50 mV Eingangsspannung: 5 mV an 500 kΩ; pos. Polarität (241.1910)
- Gleichrichter-Charakteristik: durch Referenzdiode praktisch linear (241.1910)
- Frequenzbereich: 0,1…500 MHz (241.1910)
- Frequenzgang (bezogen auf 1 MHz): 0,1…50 MHz ±0,5 dB, 50…300 MHz ±1 dB, 300…500 MHz ±2,5 dB (241.1910)
- Eingangsimpedanz: 2,5 pF//30 kΩ (241.1910)
- Max. zulässige Gleichspannung gegen Masse: 100 V (Prüfspannung 250 V) (241.1910)
- Unterdrückung einer 50-Hz-Brummspannung: ≥ 38 dB (241.1910)
- Eingangsspannungsbereich Vorsteckteiler: 20 mV…50 V (20 dB), 200 mV…500 V (40 dB)
- Frequenzbereich Vorsteckteiler: 2…1000 MHz (20 dB), 1…500 MHz (40 dB)
- Unterdrückung einer 50-Hz-Brummspannung Vorsteckteiler: ≥ 60 dB
- Teilerfehler: ±1 dB (20 dB), ±1,5 dB (40 dB)
- Eingangskapazität Vorsteckteiler: ca. 1 pF (20 dB), ca. 0,5 pF (40 dB)
- Max. zulässige Gleichspannung gegen Masse Vorsteckteiler: 1000 V
- Abmessungen Vorsteckteiler: 10×35 mm
- Wellenwiderstand BNC-Adapter: 50 Ω
- Anwendungsfre
Controls & Indicators
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Installation / Setup
The source provides detailed information on the setup and installation of the RF demodulator probes. The HF-Demodulator-Tastkopf 241.2116 and the LIN/LOG-Demodulator 241.1910 have specific connectors: a BNC connector and a 5-pin connector, respectively. The probes are recommended for measuring RF voltages with minimal loading on the test point, and they feature exchangeable probe tips for a wide voltage range.
For setup, the probe tips can be attached to an M-2.6 thread at the probe’s front end. The grounding connection is made using a grounding cable that screws into an M-2 thread on the probe body. At higher frequencies, a thin metal strip is recommended for grounding, which should be clamped under the probe’s grounding sleeve and connected to a ground-carrying circuit part.
When using the BNC adapter 241.1110.02, the probe can be used as a through-probe by inserting the adapter into the line and the probe into the spring sleeve. For measuring voltages above 5 V, the probe should be used with the appropriate slip-on attenuator and reducing sleeve.
The components of the probe can be accessed by loosening the M-2 screw next to the cable entry sleeve and removing the housing. However, defective slip-on attenuators cannot be repaired.
Operation
The manual provides information on the operation and basic usage steps for the RF demodulator probe and the LIN/LOG RF diode probe. It describes the selection of probe tips, the establishment of ground connections, and the use of a BNC adapter for measurements. The probe tips can be screwed or plugged onto the probe, and different tips are recommended for different frequency ranges. Ground connections should be made using a ground cable or a thin metal strip for higher frequencies. The BNC adapter allows the probe to be used as a through-head, and for voltages above 5 volts, the probe should be used with an appropriate attenuator and reducer sleeve.
Troubleshooting & Error Codes
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Safety & Warnings
Refer to the PDF for details.
Download ENGLISH Service manual (PDF – 508.3 KB)
Rohde & Schwarz SWOBIII-Z Service Manual: Guide for troubleshooting and calibrating the device. PDF in English, 508.3 KB.
- Brand: Rohde-schwarz-swobiii-z-operation-service-manual-german
- Model: ENGLISH
- Type: Service manual
- File size: 508.3 KB
Overview
Brief overview of the product.
Specifications
- Key spec 1
- Key spec 2
Controls & Indicators
Control panel/button layout.
Installation / Setup
- Step 1…
- Step 2…
Operation
Basic usage, modes, cycles.
Troubleshooting & Error Codes
| Issue / Code | Fix |
|---|---|
| Example | How to fix… |
Safety & Warnings
- Important warning…
Downloads
Download ENGLISH service manual (PDF)
Overview
The Rohde-Schwarz SWOBIII-Z is a sophisticated test and measurement device designed for precise signal analysis and communication testing. Widely used in telecommunications and electronic engineering, this equipment provides accurate frequency measurements, modulation analysis, and signal generation. The ENGLISH Service Manual offers comprehensive guidance for operation, maintenance, and troubleshooting to ensure optimal device performance.
Main Features and Specifications
- Frequency range: Up to several GHz for wideband signal analysis
- High-resolution signal modulation and demodulation capabilities
- Real-time spectrum and vector signal analysis
- Intuitive user interface with multi-language support
- Robust construction suitable for field and laboratory use
- Comprehensive connectivity options including USB and LAN
- Advanced calibration and self-diagnostic functions
Basic Usage and Operation Tips
Before operating the SWOBIII-Z, ensure the device is properly calibrated according to the manual’s instructions. Power on the device and allow it to complete its self-test routine. Use the intuitive menu system to select the desired measurement mode. Connect the input signal carefully using the recommended cables to avoid interference. For accurate readings, maintain stable environmental conditions and avoid sudden temperature changes. Regularly update the device firmware to benefit from the latest features and improvements.
Troubleshooting and Maintenance
If the device fails to power on, check the power supply and fuse. In case of unexpected measurement errors, verify cable connections and recalibrate the instrument. Clean the connectors regularly with appropriate cleaning tools to prevent signal degradation. For persistent issues, consult the error codes section in the manual and contact authorized service centers. Periodic maintenance as outlined in the manual will extend the device's lifespan and maintain measurement accuracy.
Safety Reminder
Always follow the safety instructions provided in the manual to prevent electrical shock or damage. Do not operate the device in wet or excessively humid environments. Ensure all cables and connectors are rated for the device’s voltage and frequency specifications. Disconnect the device from power before performing any maintenance or cleaning. Proper grounding and handling will ensure safe and reliable operation.