AVQ200 - RF Signal Inspector™ is an embedded RF signal analyzer for digital broadcasting standards. AVQ200 is an extension of Avateq’s line of products designed for remote off-air signal monitoring. Along with extensive RF measurements, AVQ200 features advanced web-based user interface with unique interference monitoring tools, a report generator, internal data storage and a user-defined alarm engine. This combination of functionality and available set of measurements makes AVQ200 an efficient tool for on-site or remote signal quality monitoring in the service area.
ATSC 1.0, ATSC 3.0, ISDB-T/Tb, DAB/DAB+
External Interfaces and Indicators
(img front and rear panel) (table of interfaces)
In order to estimate signal quality, the Receiver calculates results on a sample of the signal. Samples are captured at regular intervals.
The Receiver's 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. WebGUI indicates which source of the reference frequency is currently in use.
For UTC related measurements, for example, SFN shifts, the Receiver uses 1PPS signal which can be generated internally 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 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