Leader LFM-39A Level Meter
Manufacturer:
Model:
LFM-39A
Date:
0
Category:
Group:
Description:
WOW & FLUTTER METER
Information
The LFM-39A Wow & Flutter Meter is a direct reading type instrument designed for measurement of Wow, Flutter and Drift characteristics of tape recorders, recordplayers and other playback/recording equipment. The effective values, peak-to-peak values and center frequency (3kHz or 3.15kHz) of Wow & Flutter are indicated on the meter in accordance with J1S, CC1R, DIN, and weighted specifications. Five full scale ranges, 0.03%, 0.1%, 0.3%, 1% and 3%, are used. The use of 0.03% range makes it possible to measure accurately the Wow & Flutter characteristics of high-grade tape recorders. The LFM-39A contains an Oscillator with excellent frequency accuracy, which can be used to calibrate the drift meter and supply a recording signal. Moreover, this Wow &c Flutter meter is equipped with a TO SCOPE terminal for analyzing Wow & Flutter components and a RECORDER terminal for Wow & Flutter recording.

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Service and User Manual
Manual type:
Service and User Manual
Pages:
20
Size:
4.90 Mbytes (5135781 Bytes)
Language:
english
Revision:
Manual ID:
Date:
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
09 June 2015
MD5:
0a66eb916872a92a97fceb2074c2335d
Downloads:
1070
Information
1. DESCRIPTION ... 2 2. SPECIFICATIONS ... 2 3. CONTROLS AND TERMINALS ... 3 3.1 Front panel ... 4 3.2 Rear panel ... 5 4. OPERATION ... 6 4.1 Preparation ... 6 4.2 Tape speed (Drift) Wow & Flutter measurements ... 7 4.3 Wow & Flutter analysis ... 8 4.4 Wow & Flutter recording ... 10 5. BLOCK DIAGRAM ... 10 6. CIRCUIT DESCRIPTION ... 11 7. MAINTENANCE ... 12 7.1 Changing the fuse ... 12 7.2 How to remove the cover ... 12 7.3 Changing the voltage to correct power source voltage ... 13 8. CALIBRATION ... 14 8.1 Calibration of drift reading ... 14 8.2 Calibration of Wow & Flutter reading ... 14

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Comments (1)

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very good site ,will kept it in my favorites.

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