Marconi TF 2337A Level Meter
Manufacturer:
Model:
TF 2337A
Date:
1976
Category:
Group:
Description:
Automatic Distortion Meter
Information
The TF 2337A Automatic Distortion Meter enables rapid and accurate measurement of both level and distortion,factors of audio frequency signals. The need to tune tor fundamental frequency rejection is avoided, thus operation simply consists of the selection by push button switches of the input voltage range, distortion range and fundamental frequency. The instrument measures distortion in the conventional way, that is, by filtering out the fundamental component and comparing the residual with that of the total signal. However, because of the novel design of the ratio circuit the need for reference level adjustment prior to distortion measurement is obviated. Thus fluctuations of the input level (up to -10 dB) will not affect the accuracy of the distortion measurement. The TF 2337A is therefore suitable for repetitive distortion measurements and because of its simplicity of operation is ideal for factory testing of mass production units such as a. f. amplifiers etc. Furthermore as the instrument employs a multi-stage Twin-'Γ active filter having a fairly wide rejection band (66 dB at-+5% of fo), the affect of wow and flutter on the distortion measurement is negligible. This attribute is particularly useful for t. h. d. measurements of output signals on equipment such as tape recorders and record players. Owing to the use of field effect transistors in the input stage, internal noise is low and therefore with input signals as low. as 10 mV, distortion can be measured down to 0. 01%.

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Service and User Manual
Manual type:
Service and User Manual
Pages:
40
Size:
1.80 Mbytes (1887195 Bytes)
Language:
english
Revision:
Manual ID:
Date:
June 1976
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
28 May 2016
MD5:
5ea122a1d1a73f512b53b40824fa8787
Downloads:
233
Information
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