The service manual for the VHF-Ballempfänger Type ESB BN 1508/100-75-15 provides detailed instructions for setting up, operating, and troubleshooting the device, which is designed to receive and transmit programs from an ultrashort wave transmitter in the 87.5 to 100 MHz range. It includes information on the device's frequency range, antenna connections, and various components such as oscillators and filters, as well as guidance on maintenance and repair procedures.
Manual Overview
The service manual for the VHF-Ballempfänger BN 1508/100-75715 provides detailed instructions for troubleshooting, diagnostics, calibration, and board-level adjustments. The receiver operates within a frequency range of 87.5 to 100 MHz and features a switchable oscillator with a quartz option for specific channels. For troubleshooting, the manual emphasizes checking connections between modular components, which can be easily removed and serviced due to their plug-in design. Error diagnostics involve monitoring input voltage and frequency deviation using built-in instruments on the front panel. Calibration is achieved through adjustable controls on the rear, including settings for intermediate frequency amplification and de-emphasis adjustment. The manual also details the configuration of the high-frequency, intermediate frequency, and low-frequency sections, highlighting the use of Noval tubes for signal processing. Board-level guidance involves ensuring proper shielding and blocking of power supplies to prevent interference, with specific instructions for aligning the band filters and oscillators to maintain frequency stability.
Quick Issues Covered
- Diagnose power-up failures with voltage stabilization circuit issues.
- Error codes for frequency deviation displayed on discriminator instrument.
- Calibration adjustments using rear panel trimmers and controls.
Overview
The VHF-Ballempfänger Type ESB is designed for receiving an ultra-short wave transmitter in the broadcast band of 87.5 to 100 MHz and for relaying the received program to a secondary transmitter. This method of modulation transmission is particularly economical as it does not require radio cables or line amplifiers. Additionally, this receiver ensures high operational reliability and transmission quality that is difficult to achieve by other means.
Specifications
- Frequenzbereich: 87,5…100 MHz
- Frequenzskala: etwa 20 cm lange Linearskala mit feststellbarer Einstellung
- Oszillator: umschaltbar, veränderbar, Quarzoszillator für einen gegebenen Kanal auswechselbar
- Frequenzkonstanz im Temperaturbereich von +15° bis +35°C: des veränderbaren Oszillators +25 kHz, des Quarzoszillators +2 kHz bei +10% Netzspannungsschwankung
- Antennenanschluss: Kurzhubstecker Dezifix B auf der Rückseite des Gerätes
- Grenzempfindlichkeit: etwa 10 kT
- Fremdspannungsabstand bezogen auf 40 kHz Hub bei Eingangs-EMK: >54 db Scheitelwert bzw. >60 db Effektivwert
- Geräuschabstand bezogen auf 40 kHz Hub bei Eingangs-EMK: >60 db Scheitelwert bzw. >68 db Effektivwert, bewertet nach CCIR 1949
- Maximalhub: 75 kHz
- Spiegelfrequenzsicherheit: >80 db
- ZF-Durchschlagsfestigkeit: >80 db
- Sicherheit gegen Störungen durch Oberwellenmischung: durch fest abgestimmtes Eingangsbandfilter
- Zwischenfrequenz: 10,7 MHz
- Wirksame Selektion gegen Störsender (75 kHz Hub): zulässige Störfeldstärke Ester = 10+ ENutz bei 300 kHz Frequenzabstand bzw. Ester = 500+ Enutz bei 600 kHz Frequenzabstand für einen Geräuschabstand >54 db Scheitelwert bzw. >64 db Effektivwert, bezogen auf 40 kHz Nutzhub, gemessen bei 200 nV Eingangs-EMK
- Modulationskanal Quellwiderstand: <30 Ohm (30 Hz…15 kHz)
- Ausgangspegel: +6 db (Normalpegel) bei 40 kHz Hub; regelbar in Stufen zu 0,5 db von +3…-8 db gegenüber Normalpegel
- Frequenzgang: <+0,25 db von 30 Hz…15 kHz
- Nachentzerrung (de emphasis): 50us
- Klirrfaktor bei 75 kHz Hub: <0,5% (30 Hz…15 kHz)
- Abhörkanal Quellwiderstand: <600 Ohm
- Ausgangspegel: etwa +6 db, regelbar in Stufen zu 0,5 db zwangsläufig mit Modulationskanal
- Frequenzgang: +1 db von 40 Hz…15 kHz
- Klirrfaktor bei 75 kHz Hub: <0,5%
- Anzeige der Eingangsspannung: durch Instrument mit den Bereichen /10mV nV …10 0…100uV 0
- Anzeige der Abstimmung: durch Instrument für +60 kHz Frequenzablage
- Anzeige des NF-Pegels: durch Instrument von -6 db…+12 db
- Netzanschluss: 110/125/150/220 V; 40…60 Hz; 85 W
- Röhrenbestückung ohne Quarzoszillator: 16 Nov
Controls & Indicators
The front panel of the VHF-Ballempfanger Type ESB includes several controls and indicators. On the left upper side, there is an instrument for direct display of the input voltage. On the right upper side, there is an instrument for displaying the NF output level. In the center, there is a frequency scale, and below it, a discriminator instrument for displaying the frequency deviation of the transmitter. Below, from left to right, there is a ground terminal, a switch (S2) for changing the measurement range of the input voltage display, and a switch (S1) to activate either the variable oscillator or the quartz oscillator for a desired reception frequency. In the middle below, there is a knob for setting the frequency scale and a small knob to lock the tuning knob setting. There are three jacks for connecting headphones to monitor modulation. On the right, there is a switch (S3) to adjust the output level in 24 steps of 0.5 dB each. On the far right, there is the power switch (S4) and a small glow lamp (R1) to monitor the power-on state. The power cable and antenna are connected at the rear.
Installation / Setup
Refer to the PDF for details.
Operation
Refer to the PDF for details.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download GERMAN Service manual (PDF – 3.5 MB)
Rohde-Schwarz BN 1508 Operation Service Manual: Troubleshoot and calibrate German model efficiently. PDF size: 3.5 MB.
- Brand: Rohde-schwarz-bn-1508-operation-service-manual
- Model: GERMAN
- Type: Service manual
- File size: 3.5 MB
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 GERMAN service manual (PDF)
Rohde-Schwarz BN-1508 Operation & Service Manual Overview
The Rohde-Schwarz BN-1508 is a precision electronic test and measurement device designed for advanced signal analysis and communication diagnostics. Renowned for its reliability and accuracy, this equipment is widely used in laboratories, production lines, and field service applications to ensure optimal performance of RF and microwave systems.
Main Features and Specifications
- Frequency Range: Up to 8 GHz for comprehensive signal coverage
- High Sensitivity and Dynamic Range for precise measurements
- Multiple Measurement Modes including spectrum analysis, signal generation, and modulation analysis
- Intuitive User Interface with a high-resolution display
- Robust Build Quality suitable for both lab and field environments
- Extensive Connectivity Options: USB, LAN, and GPIB interfaces
- Comprehensive Calibration and Self-Diagnostic Functions
Basic Usage and Operation Tips
Before operating the BN-1508, ensure the device is properly connected to a stable power source and all cables are securely attached. Power on the unit and allow it to complete its self-test routine. Use the intuitive menu system to select the desired measurement mode. Always start with a calibration cycle to ensure measurement accuracy. When analyzing signals, adjust the frequency span and resolution bandwidth to optimize the display clarity. Refer to the manual for detailed instructions on advanced features and custom configurations.
Troubleshooting and Maintenance Notes
If the device fails to power on, verify the power cable and outlet functionality. In case of erratic readings or display issues, perform a system reset and recalibration. Regularly clean the exterior with a soft, dry cloth and avoid exposure to moisture or extreme temperatures. For internal maintenance or repairs, consult authorized Rohde-Schwarz service centers to maintain warranty validity and device integrity.
Safety Reminder
Always follow standard electrical safety practices when operating the BN-1508. Disconnect the device from power before performing any maintenance. Avoid exposure to high voltage signals and never open the device casing unless qualified to do so. Proper grounding and handling will prevent electric shock and equipment damage.