Equipment information
Leader LFM-39A Level Meter
Manufacturer:
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Model:
LFM-39A
Date:
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.
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:
2015 06 09
MD5:
0a66eb916872a92a97fceb2074c2335d
Downloads:
1873
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
Manual Type:
Service and User Manual
Pages:
24
Size:
3.30 Mbytes (3463317 Bytes)
Language:
german
Revision:
Manual-ID:
Date:
Quality:
Scanned document, all readable.
Upload date:
2019 08 22
MD5:
698d91fbfe4ee2feafa4b6ba92fe20bc
Uploader:
Hermann
Downloads:
523
Information
1.
2.
3.
4.
5.
6.
7.
8.
Beschreibung ...
2
Technische Daten ... 2
Bedienelemente und Anschlüsse ... 4
3.1
Frontblende ...
4
3.2
Rückwand ...
7
Betrieb ...
8
4.1
Vorbereitung ...
8
4.2
Bandgeschwindigkeit (Drift) Wow& Flutter Messungen ...
9
4.3
Wow und Flutter-Analyse ...
11
4.4
Wow und Flutter Aufnahme ...
12
Blockschaltbild ...
12
Schaltungsbeschreibung ...
13
Instandhaltung (Wartung) ...
15
7.1
Sicherungswechsel ...
15
7.2
Die Abdeckung zu entfernen ...
15
7.3
Einstellung der korrekten Eingangsspannung ...
16
Kalibrierung ...
17
8.1 Kalibrieren der Drift-Anzeige ...
17
8.2 Kalibrieren der Wow & Flutter-Anzeige ...
18
Lage der Kalibrierpunkte ...
19
Normen ...
20
Schaltbild (Zusatz) ...
21
Schaltbild Komplett ...
22