Products - AVQ1020 - ActiveCore RF Layer Monitoring Receiver
Last Update: Jun 15, 2023

AVQ1020 - ActiveCore RF Layer Monitoring Receiver

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AVQ1020 - ActiveCore RF Layer Monitoring Receiver

Description

Based on ActiveCore® Platform, AVQ1020 is a monitoring receiver for all major digital terrestrial broadcasting standards including proprietary modulation schemes. It has been designed as an easy-to-use and cost-effective solution for monitoring digital transmitter systems performance. The receiver can be integrated into a transmitter system for remote monitoring applications or used as a stand-alone unit during design verification, production tests, and system calibration.

Features and Capabilities

  • High Quality Measurements
  • 24/7 Remote Monitoring
  • Tools to Analyze Transmitter Performance
  • Intergartion into Existing NMS
  • In-Band Interference and Echo Monitoring

Supported Standards

ATSC 1.0, ATSC 3.0, ISDB-T/Tb, DAB/DAB+, HD Radio

Application Block-Diagram

AVQ1020 RF Layer Monitoring Receiver Application Block-Diagram

External Interfaces and Indicators

(img front and rear panel) (table of interfaces)

Functionality

In order to estimate signal quality and transmitter system performance, the Receiver calculates results on a sample of the signal. Samples are captured at regular intervals.

The Receiver internal source of 10MHz reference can be synchronized (locked) to an external 10MHz. The Receiver is programmed to automatically switch to the external source once it is detected at the designated input.

For UTC related measurements, for example, SFN shifts, the Receiver uses 1PPS signal which can be generated internally by the Receiver or provided from an external source. The internally generated 1PPS signal is obtained from a VCO which is not synchronized with the UTC. Switching between 1PPS sources is done automatically. The external 1PPS source has priority over internal.

All reported by the Receiver results can be conditionally divided into the following groups.

  • First group is related to the signal general statistics. Reported parameters in this group include input signal power level, signal PAPR, shoulder attenuation, signal central frequency offset, emission mask, etc.
  • Parameters of the second group include transmitter performance and channel characterization such as non-linear and linear distortions in a form of AM-AM/AM-PM curves, channel Frequency/Amplitude responses and Group Delay, amplitude and phase errors, etc.
  • Next group of the reported parameters is broadcast standard specific. The parameters include signal SNR/MER/EVM, framing structure, transmission modes, used modulation, guard interval length, etc.

Obtained results are compared against user defined thresholds. Alarms are triggered in case of exceeding the thresholds values. Depending on alarm configuration the following actions can be undertaking:

  • generating and sending an SNMP trap;
  • sending an email notification with site ID, time stamp and alarm type included in the message body;
  • web pop-up notification