Информация по оборудованию

EICO Electronic Instrument Co. Inc. 369 Генератор
Производитель:
EICO Electronic Instrument Co. Inc.
Модель: 369
Дата: 1964
Категория: Измерительная техника
Группа: Генератор
Описание: TV-FM Sweep and Post-Injection Marker Generator
Информация:

The EICO Model 369 TV/FM Sweep & Post-Injection Marker Generator provides the greatest dependability, accuracy, and speed for service and factory alignment of color and black-and-white tv receivers and fm receivers. With the EICO 369, circuit response is notaffected by markers and markers are notaffected by circuit response. The EICO 369 feeds only the required sweep signal to the input of the circuit being aligned or tested. At the output end of the circuit, a demodulator cable picks off the signal, and feeds the demodulated signal to a mixer stage inside the Generator where the markers are added. Then this combined signal is fed to the Oscilloscope. This means that circuitry under test of alignment is not affected by the marker signal, and that traps in the circuitry will not reduce or eliminate the marker. The EICO 369 has a controllable inductor sweep circuit. This type of purely electronic sweep circuit has no mechanical parts to wear and give trouble later. The sweep Generator is independent of the marker Generator. It has five ranges: 3-7. 5mc; 6-16mc; 16-42mc; 36-95mc and 75-220mc. All five ranges are fundamentals and tuning to the desired center frequency is simplified by a 6:1 vernier dial and a 350° scale. Output impedance is 50 ohms. Retrace blanking is obtained by both direct grid cut-off and indirect B+ cut-off (via the AGC chain) of the Oscillator with a blanking tube that conducts during the negative excursion of the 60 cps sine sweep. A three-stage AGC circuit keeps the level of the swept signal constant over its entire frequency range, even when the widest sweep width of 20mc is being used. A phasing control at the rear of the EICO 369 adjusts permanently the horizontal sweep signal fed to the 'scope. The marker Generator in the EICO 369 has 4 ranges covering 2 - 225mc. The highest range, 60 - 225mc, is the third harmonic of the next lower range. All Other ranges are fundamentals. Frequency setting is simplified by a 6:1 vernier dial and a 350° scale. For a rapid check of marker Generator alignment, a 4.5mc crystal is supplied with each generator. When plugged into a front panel socket it automatically turns on a fixed frequency marker Oscillator. The 4. 5mc signal produced by this Oscillator is mixed with the variable frequency marker. The 4.5mc crystal is used also for alignment of sound circuitry in tv receivers. The demodulated wave form with post-injected marker is fed to the vertical input of the 'scope, and the horizontal sweep to the horizontal input of the 'scope, through a single, shielded, two-conductor cable. Separate level controls for trace size and marker size on the front panel can be used independently. FEATURES 1. Entirely electronic sweep circuit (no moving parts, hum, or vibration) using controllable inductor, in which the Oscillator coil inductance depends on the controlled excitation current in the primary windings of the unit. The controlled inductor provides a large and smoothly variable sweep width, and the sweep obtained is extremely linear and stable. The availability of a large sweep width renders operation of the instrument non-critical, since the band-pass region is easily located on the 'scope trace even when the tv set or Generator are considerably off frequency. Once the band-pass waveform is located, it is only a matter of adjusting the sweep Generator center frequency and the sweep width as required for the most satisfactory display. 2„ Extremely flat sweep signal provided by the three-stage AGC circuit which automatically adjusts the Oscillator for maximum output on each band with minimum amplitude variations. High output on all five bands permits "cold" alignment of all tuned circuits and filters.

Эти руководства доступны для вышеуказанного оборудования:

Ручной тип: Обслуживание и Руководство пользователя Eico-7730-Manual-Page-1-Picture
Страниц: 40
Размер: 17.17 Mbytes (18008246 Bytes)
Язык: английский
Редакция: 1
Руководство ID/номер:
Дата: Март 1969
Качество: Сканированный документ, читая частично плохо, частично не читается.
Дата загрузки:
MD5: feefdb3db1898368052c55102c865acb
Загрузки: 193 начиная с 18 Февраль 2016
Информация:

Eico-7730-Manual-Page-1-Picture


Ручной тип: Обслуживание и Руководство пользователя Eico-7760-Manual-Page-1-Picture
Страниц: 40
Размер: 17.22 Mbytes (18055898 Bytes)
Язык: английский
Редакция: 1
Руководство ID/номер:
Дата: 1964
Качество: Отсканированы документу, все читается.
Дата загрузки:
MD5: f5126b30fe4e42b8ebd807fc95f7a266
Загрузки: 174 начиная с 20 Февраль 2016
Информация:

Instruction Manual

Eico-7760-Manual-Page-1-Picture


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