Atec 1730 User Manual
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-standard) 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 corresponds directly with the graticule vertical scales, magnified 5 times, or can be set
to a specific amplitude by using the Variable GAIN control.
1–1
1730–Series Introduction
An RGB or YRGB Parade display, for camera setup, is accommodated with a
shortened sweep. The input of the camera signal and an enable are through the
rear-panel REMOTE jack. The choice of 3-step (RGB) or 4-step (YRGB) is
made by changing the position of an internal jumper.
The 1730-Series has a unique Store and Recall function built in that allows for
the storing of up to four front-panel setups that can be recalled by pressing the
appropriate recall button, or a ground closure through the rear-panel REMOTE
connector. In addition, four factory-programmed measurement setups can be
accessed, by external ground closures input through the REMOTE connector.
An auxiliary output, to control a companion 1720-Series Vectorscope, is
provided through a rear-panel connector. The auxiliary output contains a bus for
two-way communications between the waveform monitor and vectorscope
microprocessors and a strobe to provide line select unblanking for the Vectorscope.
Typical Configurations
The 1730-Series Waveform Monitor is designed for operation either alone or
with a 1720-Series Vectorscope. Line select and measurement recall for this
waveform monitor are also used by the vectorscope. Because of these capabilities, and the available 90 or 100 Hz triggering, the 1730-Series Waveform
Monitor is ideally suited to operate in a VCR bridge. With its factory-preset
measurement routines, that can be accessed through the rear-panel REMOTE
connector and the Store/Recall functions, it is possible to have one-button
measurements of key parameters, including various vectorscope measurements.
In addition to the VCR bridge and the typical Master Control monitoring
applications, this monitor can be used in camera chains. It has a choice of RGB
or YRGB Parade display that can easily be selected by changing one internal
jumper setting. The Parade signal and enable are input through the rear-panel
REMOTE connector.
A number of operating conditions can be altered by changing internal jumpers,
using some of the factory-preset combinations, or setting up and saving the front
panel with the Store/Recall function. Using these methods most of the current
528A operational modes can be accommodated. There is a difference in how the
remote control operates — the 1730-Series uses ground closures, not positive
voltage as the 528A did.
1–2
Options
1730–Series Introduction
CRT Options
Power Cord Options
Accessories
Standard Accessories
The standard instrument is shipped with a P31 (green) phosphor CRT installed.
Option 74 instruments are shipped with a P4 (white) phosphor CRT installed.
Any of the power cord options described in Section 7 can be ordered for the
1730-Series. If no power cord option is ordered, instruments are shipped with a
North American 125 V power cord and one replacement fuse.
The following accessories are shipped with the 1730-Series. Part numbers for
these accessories are located at the end of the Replaceable Mechanical Parts list.
1 1730-Series Instruction Manual
1 Power Cord, with selected power plug option
1 Replacement Cartridge Fuse (correct rating for the power
plug option)
3 Replacement Scale Illumination Bulbs (Tektronix Part
No. 150-0168-00 or ANSI #73)
Optional Accessories
There are a number of accessories that can be used with a 1730-Series Waveform
Monitor. The following is a list of the most common accessory items for this
series of waveform monitors. 1700F items are Field Upgrade Kits that are
installed by the customer; instructions are included in all Field Upgrade Kits.
Viewing Hood (016-0475-00)
Front Panel Cover (200-3897-01)
1700F00, Plain Cabinet (painted silver-grey)
1700F02, Portable Cabinet (painted silver-grey)
1700F05, Side-by-Side Rack Adapter
1700F06, Blank Half-Rack Width Panel
1700F10, DC Power Converter
1–3
1730–Series Introduction
Safety Information
Specification
The 1730-Series is intended to operate from an ac power source that will not
apply more than 250 V rms between the supply conductors or between either
supply conductor and ground. A protective ground connection by way of the
grounding conductor is essential for safe operation (except for those instruments
that are operated from a battery supply).
The 1730-Series was tested for compliance in a cabinet. To ensure continued
compliance, the instrument will need to be enclosed in a cabinet that is equivalent to the Factory Upgrade Kits that are listed as Optional Accessories for the
1730-Series. A drawing of the 1700F00 plain cabinet is contained in the
Installation Instructions (Section 3).
In the specification tables that follow, some items are identified as performance
requirements. These can be verified by performing the Performance Check
Procedure in Section 5. Not all performance requirements have a measureable
tolerance, and therefore do not have a performance check step; however, they are
either verified by indirect means, through other portions of the procedure, or are
design criteria that do not need to be tested for individual instruments.
Whenever there is a verifiable performance requirement, in the specification
table, there will also be a reference to identify the location, in the Performance
Check Procedure, of the appropriate performance verification procedure.
The supplemental Information designation in the tables indicates that this is
information that either amplifies a performance requirement or is special
information that is of importance. Unlike performance requirements, there is no
need, and often no way to check these items to any specific tolerance.
1–4
1730–Series Introduction
T able 1–1: Vertical Deflection System
Characteristic Requirement Supplemental Information
Frequency response
Flat
Flat: 50 kHz to 6 MHz within 2% of
response at 50 kHz.
Flat (X5): 50 kHz to 6 MHz within 5%
of response at 50 kHz.
Specifications apply for full screen
height video input signal, with variable
GAIN off.
Step
Number
13
Low-pass filter
Chroma filter
Transient response Preshoot: ≤1%
Field rate tilt ≤1% Field rate square wave or vertical
Line rate tilt ≤1% 25 ms bar 15
Overscan Less than 2% variation in baseline of
Differential gain Displayed differential gain is ≤1% with
Deflection factor 140 IRE (1.0 V) within 1% with 1 V
1730: At least 30 dB attenuation at
3.58 MHz
1735: 4.00 MHz
1731: 4.43 MHz
NTSC and PAL-M: Nominal bandwidth
1 MHz. Attenuation at 7.2 MHz 20 dB
or greater. Response at 3.58 MHz
does not vary between FLAT and
CHROMA by more than 1%.
PAL: Nominal bandwidth 1 MHz.
Attenuation at 8.9 MHz 20 dB or
greater. Response at 4.43 MHz does
not vary between FLAT and CHROMA
by more than 1%.
Pulse-to-Bar Ratio: X1: 0.99:1 to
1.01:1X5: 0.98:1 to 1.02:1
Overshoot: X1: 2% or less X5: 4%
or less
Ringing: X1: 2% or less X5: 4% or
less
100 IRE (700 mV) 12.5T (20T)
modulated pulse as it is positioned
over the middle 80% of the screen.
10% to 90% APL changes.
input.
Response at 15 kHz does not vary
between FLA T and LPASS by more
than 1%
Upper and lower –3 dB points are
approximately ±350 kHz from
3.579545 MHz. 15 to 35 C operating
temperature.
Upper and lower –3 dB points are
approximately ±350 kHz from
4.433619 MHz. 15 to 35 C operating
temperature.
Specifications apply for full screen
height video input signal, with variable
GAIN off.
window
Chroma filter must be selected.
Baseline at 50 IRE and displayed
subcarrier adjusted to 100 IRE with
VAR gain.
1 V full scale. 20-30 °C, Flat response
selected. Vertical gain temperature
coefficient is –0.3%/10 °C.
17
18
15, 16
15
15
9
1–5
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