Marconi TF 2008 Generatore
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Modello:
TF 2008
Data:
1980
Categoria:
Gruppo:
Descrizione:
10 KHz-510MHz AM/FM Signal Generator
Informazioni
INTRODUCTION
The TF 2008 is a wide range f. m./a.m. signal Generator with the full 10 kHz to
510 MHz frequency range covered in eleven switch selected ranges and is
particularly useful for checking wide and narrow deviation radio links and
broadcasting systems. It uses solid state active circuit elements in order to
utilize new mechanical and electrical arrangements. Particular attention has
been paid to grouping controls together for ease of operation whilst the
circuits are designed for complete independence of individual controls.
Precise automatic level control circuits render the provision of a set carrier
control unnecessary. A single master Oscillator unit is used to cover the entire
frequency band of the Generator allowing particularly high stability. A unique
feature is the use of a single dial, continuously variable output attenuator for
levels from 0. 2 |j.V up to 200 mV e. m. f.; an alternative version is available
with the output expressed in terms of p. d. in 50 Q, i. e. 0.1 p.V up to 100 mV. In
addition to being a high precision wide range signal Generator, TF 2008 also
operates as a versatile sweeper.
Tipo di manuale:
Servizio e manuale utente
Pagine:
128
Dimensione:
6.78 Mbytes (7106793 Bytes)
Lingua:
english
Revisione:
ID del manuale:
Data:
1980 01 01
Qualità:
Documento scansionato, la lettura in parte male, non in parte leggibile.
Data caricamento:
2019 01 05
MD5:
b6d2e519e78d3754cea9ecdb90d5f9ea
Scaricamenti:
630
Informazioni
1 GENERAL INFORMATION 1.1 Introduction ... 5
1.2 Data summary ... 6
1.3 Accessories ... 12
2 OPERATION
2.1 Preparation for use ... 14
2.2 Controls - supply and tuning 14
2.3 Controls - modulation, sweep
and output ... 16
2.4 Setting frequency ... 17
2.5 Frequency shift ... 18
2.6 Setting up for c.w. or modu-
lated output ... 18
2.7 Swept operation ... 20
2.8 Setting output ... 25
3 TECHNICAL DESCRIPTION 3.1 Circuit summary ... 29
3.2 R.F. oscillators ... 29
3.3 Modulation Oscillator . 30
3.4 Sweep driver ... 30
3.5 A.M. driver and modulation
monitor ... 31
3.6 F.M./AF driver and output
stage ... 32
3.8 Frequency doublers ... 33
3.9 Trebler ... 3.10 Mixer units ... 3.11 Amplifier units ... 3.13 90 MHz crystal Oscillator .. 34
34
3.14 Crystal Calibrator ... 34
3.15 Counter Amplifier ... 35
3.17 A.L.C. system ... 35
3.19 Detectors and comparator .. 36
3.20 A.L.C. Amplifier ... 36
3.21 Power supplies ... 38
Chapter 4 MAINTENANCE 4.1 Introduction ... 39
4.2 Screw fasteners ... 39
4.4 Dismantling and component access ... 4.5 Circuit voltages ... 40 46 46
4.7 Performance tests ... 48
4.7.5 A F accuracy ... 48
4.7.6 Crystal calibrator
markers ... 49
4.7.7 External A F ... 50
4.7.9 V.S.W.R ... 53
4.7.18 Modulation bandwidth . 54
4.7.19 External f.m. sensitivity 55
4.7.20 F.M. on a.m ... 56
4. 7. 21 F. M. on c.w ... 56
4. 7. 22 A . M. on c. w ... 57
4. 7.23 A.M. on f.m ... 57
Chapters REPAIR
5.1 Introduction ... 59
5.2 Fault finding ... 63
5.3.1 Test equipment required 63
5.3.2 Power supply and sub-
stabilizer ... 64
5.3.5 R.F. processing box .. 65