Technical Articles

Supplier:

Cobham AvComm


Cobham AvComm has published these technical articles:

(RF, Microwave, and Wireless Components)
From this Article:
Before we begin testing any radio communication system, we need to assess the parts that make up that system and the environment in which we are required to test the system. The parts of an installed... (View Full Article)
(RF, Microwave, and Wireless Components)
From this Article:
While voice minutes are predicted to increase, current competitive pressure within the mobile communications market is resulting in a decrease in ARPU. If 3G is to succeed commercially, then network... (View Full Article)
From this Article:
The aim of this application note is to provide information allowing for better use of the power measurement functions, to explain the measurement method employed and to highlight the causes for... (View Full Article)
From this Article:
Avionics receivers for VOR and ILS provide demodulated audio outputs that are used to drive aircraft cockpit display unit controllers and auto-pilot systems. To enable the testing of this circuitry in... (View Full Article)
(RF, Microwave, and Wireless Components)
From this Article:
This application note explains how IQCreator can easily be used to quickly package and download these user-defined waveforms to the 3410 Series ARB. A discussion on data formats, waveform scaling and... (View Full Article)
From this Article:
Receiver diversity requires the use of two antennas for the receive signal. This presents the Node B with an increase in signal to noise ratio of about 3 dB due to correlation in signal power, but not... (View Full Article)
From this Article:
The IFR 2945B Communications Service Monitor is ideally suited to the testing of trunking repeaters. It provides an extensive array of tests, allowing verification of performance, and rapid diagnosis... (View Full Article)
From this Article:
The key to making receiver tests is to measure the bit error rate on the demodulated data. In the case of testing mobiles, this is usually done by looping back the signal and demodulating the signal... (View Full Article)
(Signal Conditioning)
From this Article:
In 1984 John Wells of Marconi Instruments invented a new solution to the problem of Fractional-N Synthesizers that required the use of no analog components to correct the noise and spurious normally... (View Full Article)
(RF, Microwave, and Wireless Components)
From this Article:
Radar systems frequently use pulse modulated signals which may also incorporate a linear frequency sweep (chirp) or frequency hopping to enhance the performance of the system. The 3410 series digital... (View Full Article)
From this Article:
The IFR 2026 Multisource Generator family is an effective method of supplying multiple calibrated signals to a device under test. The generator contains two or three high performance, high power, low... (View Full Article)
From this Article:
Major airports throughout the world are equipped with Instruments Landing Systems (ILS). These systems allow the airports to operate more safely in the presence of adverse weather conditions. The... (View Full Article)
From this Article:
Typical causes of degraded return loss measurements on transmission lines and antennas are examined. Good measurement techniques are explained and useful hints provided for users of the 6820 series... (View Full Article)
(Data Acquisition)
From this Article:
The transmission of data or digitally encoded speech has resulted in the adoption of a variety of methods to transmit the information. This Technical Information explains basic techniques used and the... (View Full Article)
(Signal Conditioning)
From this Article:
The ILS Localizer and VOR beacons have super-imposed on the transmitted signal a three letter Morse code signal to identify the transmission source. For instance, a beacon located at London Heathrow... (View Full Article)
(Signal Conditioning)
From this Article:
This Application Note examines the building blocks used in the output stages of a typical signal generator and explains how they contribute and interact to affect the critical specification points of... (View Full Article)
From this Article:
The TETRA standard is designed to share spectrum allocation with analog systems and therefore the performance specified forTETRA transmitters is onerous in order to minimize interference. This in turn... (View Full Article)
(RF, Microwave, and Wireless Components)
From this Article:
The test specifications for the VHF Omni-Directional Range (VOR) are detailed at Annex 10 of the ICAO VOR reference document. Part of the specification calls for the variation of the 9960 Hz... (View Full Article)

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