Atec Tektronix-1730 Series - Manual

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Section 1
Introduction and Specification
The TEKTRONIX 1730-Series is an 8-1/2-inch wide by 5-1/4-inch high
waveform monitor, weighing approximately 8 pounds. The 1730 (System M,
NTSC) and the 1731 (System I, B, etc., PAL, PAL-M), and the 1735 (dual-stan-
dard) versions can be powered from an ac source or, with the addition of a field
upgrade kit (1700F10), 12 Vdc. The CRT occupies approximately two-thirds of
the front-panel area, with the control panel taking up the remainder of the space.
Operation is controlled by a microprocessor that polls the front-panel switches
and remote ground closures. Front-panel switches are of the momentary touch
type with lighted functional indicators. Most of the switches are also used to
select special functions, which are accessed by holding the switches in until the
microprocessor recognizes the request.
The signal is displayed on a bright CRT capable of displaying one line per frame.
It is of the mesh type, for better geometry, and uses an internal graticule to
reduce parallax. Variable graticule scale illumination provides even lighting to
improve measurement accuracy and the quality of waveform pictures. Option 74
provides a P4 (white) phosphor tube.
The Channel A and B Composite Video Inputs and the External Reference
Signal Input are high impedance bridging loop-throughs, in order to protect the
integrity of the signal paths. The input switching allows for the display of either
Channel A or Channel B Input or both inputs. Synchronization can be either
internal or external, with the further choices of using remote sync or 90 or 100
Hz synchronization, from a VTR, where the application warrants.
The 1730-Series offers a choice of three basic sweep rates: 2 Field, 2 Line, and
1 Line, each of which can be magnified to provide three additional sweep rates:
1
ms (2 Line), 0.2 ms (1 Line), and X25 (2 Field) which provides for viewing the
complete vertical interval. In addition, there is full frame line selection that can
be displayed as 1 line, 2 lines, or 15 lines. A bright-up pulse, for picture
monitors, that corresponds to the intensified region on the CRT display, is
available through a rear-panel bnc connector.
The vertical signal processing provides a choice of fast or slow dc restoration, or
an unclamped display. The input signal can be unfiltered (Flat) or either Low
Pass or Chrominance filtered. There is also a combination of Flat and Low Pass
filtering available when a 2 Line or 2 Field sweep rate is employed; the display
consists of one line or field low pass filtered while the second is unfiltered.
Vertical amplitudes can be displayed in a calibrated gain mode, which corre-
sponds directly with the graticule vertical scales, magnified 5 times, or can be set
to a specific amplitude by using the Variable GAIN control.