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The Philips PM5540 was an early electronic video signal generator, which generated a monochrome test card [3] that is considered to be a black-and-white predecessor of the widely used Philips PM5544 and the latter's related family of Philips circle test patterns.
Experimental broadcasts using the first three prototype versions of the UEIT (one of which was a modification of the Hungarian HTV TR.0782 test card; [9] but all were collectively referred to as UEIT-1) began from the Ostankino Tower transmitter in 1970, with results being used to create the current version of the test pattern.
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Measuring ESR can be done by applying an alternating voltage at a frequency at which the capacitor's reactance is negligible, in a voltage divider configuration. It is easy to check ESR well enough for troubleshooting by using an improvised ESR meter comprising a simple square-wave generator and oscilloscope, or a sinewave generator of a few tens of kilohertz and an AC voltmeter, using a known ...
Musical Fidelity was founded in 1982 by Antony Michaelson, a clarinettist and Hi-Fi enthusiast, following his exit from Michaelson & Austin, a predecessor company of which he was a partner. Musical Fidelity's first product was "The Preamp", which incorporated moving coil and moving magnet pre-amplification and a single line-level ‘Tuner’ input.
This was intended for use by hi-fi amplifier manufacturers. If records were engineered to sound good on hi-fi amplifiers using the AES curve, this would be a worthy goal towards standardization. This curve was defined by the transition frequencies of audio filters and had a pole at 2.5 kHz (approximately 63.7 μs) and a zero at 400 Hz ...
A capacitance meter is a piece of electronic test equipment used to measure capacitance, [1] mainly of discrete capacitors. Depending on the sophistication of the meter, it may display the capacitance only, or it may also measure a number of other parameters such as leakage, equivalent series resistance (ESR), and inductance.
The RMA 1946 Resolution Chart was transmitted by NTS and NOS in the Netherlands, SRG SSR in Switzerland, [18] VRT and RTBF in Belgium, RTP in Portugal, TVP in Poland, TVB in Hong Kong, [citation needed] Venevisión in Venezuela (525-lines variant; in conjunction with Indian-head test pattern), [citation needed] WISN-TV in Milwaukee, Wisconsin (525-lines variant) [19] and on low-powered ...