Rohde-schwarz-esh2-operating MANUAL – Operation manual (PDF)

The operation manual for the ESH 2 test receiver provides detailed instructions on setting up the receiver, including positioning, temperature, and power supply options, as well as guidelines for operating the device with AC or battery power. It also covers troubleshooting steps such as checking the mechanical zero of the meter, performing performance checks, and calibration, along with measurement examples and sensor connections.

Brand: Manuals
Model: MANUAL
Type: operation manual
File size: 1.8 MB

Manual Overview

The operation manual for the ESH 2 Test Receiver provides detailed guidance on setup, operation, and troubleshooting. The receiver processes signals through a series of RF attenuators and filters, converting them through multiple intermediate frequencies (IF) for precise measurement. Key troubleshooting involves monitoring overload detection circuits at various stages, indicated by a blinking level reference on the front panel. Calibration is crucial, utilizing a standard pulse generator for CISPR measurements and a sinewave generator for average and peak-value measurements. The receiver’s gain calibration is automatic, triggered by button or bandwidth switch. The logic circuits manage the gain and display levels, ensuring accurate readings on the meter. For diagnostics, the manual emphasizes checking mechanical zero and adjusting attenuation settings. The receiver’s tuning relies on a low-noise synthesizer with 100 Hz increments, controlled by an opto-electronic pulse generator. The manual includes board-level guidance for maintaining signal integrity and ensuring accurate demodulation across various signal types, including telegraphy, AM, SSB, and FM.

Quick Issues Covered

Diagnose power-up failures with AC and battery operation modes.
Calibrate receiver gain using built-in sinewave generator.
Trace circuits using detailed schematics for signal path analysis.

Overview

The ESH 2 Test Receiver is a sophisticated device designed for signal measurement and analysis. It features a multi-stage signal processing system that includes RF attenuators, mixers, and filters to convert and process signals across various intermediate frequencies. The receiver is equipped with overload detection circuits, adjustable amplification, and demodulation capabilities for different signal types such as telegraphy, AM, SSB, and FM. It also includes a sinewave generator for calibration and supports two-port measurements. The device is controlled by a logic circuit that manages gain calibration and displays signal levels on a liquid crystal display. The receiver is tuned using a low-noise synthesizer with 100 Hz increments, and it provides options for aural monitoring through a built-in speaker or headphones.