Equipment information

Marconi TF 2015 Generator
Manufacturer:
Marconi
Model: TF 2015
Date: 1973
Category: Measurement instruments
Group: Generator
Description: 10MHZ - 520MHz AM/FM Signal generator
Information:

TF 2015 is a general purpose a.m./ f.m. signal Generator covering the frequency range 10 MHz to 520 MHz in eleven switched bands. Fundamental frequency generation is by voltage tuned oscillators which, in conjunction with the panel mounted controls, enable easy tuning to narrow band communication receivers up to the highest carrier frequencies.

These manuals are available for the above equipment:

Manual Type: Service Manual Marconi-7876-Manual-Page-1-Picture
Pages: 57
Size: 2.00 Mbytes (2102385 Bytes)
Language: english
Revision: 2
Manual-ID/Number: H 5Д8 1 I -(VIOL
Date:
Quality: Scanned document, reading partly badly, partly not readable.
Upload date:
MD5: 5f26c408bff7e9b9c6a12dbb6cb5be87
Downloads: 476 since 05 June 2016
Information:

Chapter 1 G EN ER A L IN FO RM A T IO N 1 . 1 Introduction . . . , . , 1. 2 Data summary 1 .3 Versions and a c c e sso r ie s Chapter 2 O P ERA T IO N 2.1 P relim in a ry requirements 2.2 ^ AC supply cable __________ 2.3 “ Battery operation 2.4 Fuses . . . . . . 2.5 Controls and connectors 2.6 Setting frequency ________ 2.7 СW output . . . . . . 2.8 Internal amplitude modulation 2.9 Internal frequency modulation 2.10 External a.m. or f .m . . . . 2.11 Internal a .m . with external f.m. 2.12 Internal f .m. with external a .m . 2.13 Internal modulation output 2.14 Operation with digital S3rnchronizer 2.15 Sweep facility . . . . . . 2.16 Attenuator calibration . . . 2.17 Matching to high impedance loads 2.18 Use of i . f . probes . . . . . . 2.19 Quieting sensitivity measurements 2.20 Correct use of the -H3cLB output facility Decibel conversion tables . . . 10 10 10 10 10 12 13 13 13 13 13 13 14 14 14 14 14 15 16 15 16 & 17' chapter 3 T EC H N IC A L DESCRIPTION 3.1 Mechanical characteristics ... . . . ___ ... 19 3.2 Overall function . . . . . . . . . . . . . . . ... 19 3.3 Circuit functions ... . . . . . . ... 20 3.4 R F oscillators ... ... 20 3.5 Tuning and frequency modulation . . . . . . . . . ... 20 3.6 F ir s t a . i . c . loop . . . . . . . . . . . . . . . ... 20 3.7 Pre-amplifier . . . . . . . . . . . . . . . ... 20 3.8 Modulator and amplitude modulation . . . . . . ... 21 3.9 Counter Amplifier . . . . . . . . . . . . . . . ... 21 3.10 AM driver and d .c . offset circuits . . . . . . ... 21 3.11 Wide band Amplifier . . . . . . . . . . . . ... 21 3.12 Second a . I .e . circuit . . . . . . — — ... 21 3.13 Fine r . f. output control . . . . . . . . . . . . ... 21 3.14 Modulation Oscillator . . . . . . . . . . . . ... 22 3.15 Predistortion circuit . . . . . . . . . . . . ... 22 3.16 +6 dB output . . . . . . . . . . . . . . . ... 22 3.17 Monitor circuits . . . . . . . . . . . . . . . ... 23 3.18 Coarse r . f . output control . . . . . . . . . . . . ... 23 3.19 Power unit . . . . . . . . . . . . . . . . . . ... 23 3.20 Supply filters . . . . . . . . . . . . . . . ... 23 Chapter 4 M A IN T EN A N C E 4.1 Introduction __ ___ 4 . 2 Sc r ew f a s t e n e r s . . . . . . . . . 4 . 3 Access to sub-nssomblies and components 4.4 P relimin a ry checks ... 4.5 Test equipment . . . . . . . . . 4.6 Performance chccks . . . . . . 4. 6.1 Power supply Unit A20 4.6.2 Frequency calibration Unit Δ12 (sub-assemblies A l 4.G.3 R F output (normal) 4.6.4 R F output (+6 dB) . . . 4.6.5 Checking v . s .w . r . (frequencies 350 to 500 MHz) 4.6.6 Checking v . s .w . r . (frequencies 10 to 350 MHz) 4.6.7 Modulation Oscillator performance 4.6.8 Checking f .m . deviation 4.6.9 Checking a .m . depth 4.6.10 Checking f .m . tracking 4 . 6 . 1 1 Checking a . I . e . s y s t em 4.6.12 Counter output level 4.6.13 External modulation sensitivity 4.6.14 AM distortion . . . 4.0.15 FM distortion . . . 4.6.16 üpurious f .m . on c .w . 4.6.17 Spurious a ,m . on c .w . 4.6.18 Spurious a .m , on f .m . 4.6.19 Spurious f .m . on a .m . 4.6.20 C a r r ie r harmonics 4.6.21 Coarse r . f . output control 4.6.22 Fine r . f . output control 4.7 Cleaning rotary switches . . . to A l l ) 24 2 1 21 24 2 1 27 27 23 28 2 Я 28 29 29 29 30 30 30 30 30 31 31 31 32 32 33 33 33 33 33 Chapter 5 REPAIR 5.1 Introduction . . . __ __ ___ 5.2 Fault location . . . . . . . . . 5. 3 Replacing tuning drive cord . . . 5.4 Replacing transformers A16, T I , T2 5.5 Additional information . . . 34 34 39 40 40 Chapter 6 REPLA CEA BL E PARTS Introduction and ordering Index to units 41 54 Chapter 7 C IRC U IT DIAGRAMS Circuit notes . . . . . . F ig . 7.1 R F o s c i l l a t o r s . . . . . . 7.2 Wide band amplifiers - modulator - a 7.3 Tuning - modulation - monitor circuits 7.4 Power unit and coarse attenuator .c . circuits

Marconi-7876-Manual-Page-1-Picture


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