Specifications

ManualsBrandsPromax ManualsPower ToolsGV-698

TV SIGNAL GENERATOR

GV-698

1 GENERAL

1.1 Description

The GV-698 TV signal generator is a multi-standard, multi-system unit with

advanced functions. It has been designed using the most modern technology resulting

in great reliability and reduced consumption. Its modular structure makes it highly

versatile and permits rapid access to all its components. Starting from base modules,

it is possible to increase the applications of the instrument by adding modules if

desired.

The GV-698 is particularly suitable for those industrial sectors that require

high-quality pictures such as adjustment and analysis lines, production studios,

technical assistance services, etc. In addition, being easy to operate, it is indispensable

in the training of video technicians.

The GV-698 operates in accord with the CCIR/OIRT recommendations for the

colour systems PAL-SECAM and FCC for the NTSC system and may provide a

modulated signal for practically all the transmission standards presently in use. The

video is equipped with 32 pattern charts to analyze the picture visually or with an

oscilloscope. For geometric adjustments, the electronic circle can be inserted in all the

charts.

To detect defects in the tuning circuits and IF amplifier stages, the GV-698 has

a complete radio-frequency modulator, its principal characteristics being:

- Frequency range from 37 to 865 MHz

- Synthesized frequency output

- Tuning by channels or by frequency (in steps of 50 kHz)

- Attenuation of output RF signal up to 50 dB (in steps of 10 dB)

The VTR (Video Text Recorder) function is available to check the functioning

of video tape recorders, particularly the functions of "still", stepped image, heads

position, etc.

Microprocessor control, the presentation of information on a wide illuminated

alphanumeric display and the incorporation of a single rotary selector for all the

functions results in simple and easy operation. The functions controlled are:

- Selection and display of RF by channel or by frequency

- Selection of the colour system and sound standard

- Selection of the output chart

- Storage of up to 32 different programs is possible. Each program

(chart/system-sound standard/frequency or RF channel) may be stored or

retrieved at any time.

Internal (1 kHz/3 kHz) or external modulation of sound is possible. For a

superior analysis of the video and sound signal, there are push–buttons for cancelling

or including certain basic functions, such as:

05/96 GV-698

Summary of content (42 pages)

PAGE 1
TV SIGNAL GENERATOR GV-698 1 GENERAL 1.1 Description The GV-698 TV signal generator is a multi-standard, multi-system unit with advanced functions. It has been designed using the most modern technology resulting in great reliability and reduced consumption. Its modular structure makes it highly versatile and permits rapid access to all its components. Starting from base modules, it is possible to increase the applications of the instrument by adding modules if desired.
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- 46 - - Independent cancellation of the colour subcarrier and of the burst Inclusion of the electronic circle Cancellation of the interlace in the video signal Cancellation of the sound subcarrier Selection of stereo or dual sound Independent cancellation of L and R sound Cancellation of the TELETEXT and VPS signal Selection of the information to transmit in the VPS signal On the front panel there is an adjustable composite video output and an RF output with an attenuator of up to 50 dB.
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- 47 - 1.2 Specifications The values indicated with tolerances are guaranteed by the manufacturer, those without are to be nominally expected within a group of identical instruments. Specifications are valid 10 minutes after switching on. TV SYSTEM System RF Standard No.
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- 48 SECAM (B,G,H,D,K,K1,L) colour subcarrier (Version /3,/5,/11) For = 4.406250 MHz ± 2 kHz Subcarrier frequency Fob = 4.250000 MHz ± 2 kHz (sinc. fH) Identification pulses Line 7 to 15 in odd fields Frame (position) Line 320 to 328 in even fields Dr = 4.756250 MHz ± 35 kHz Frequency Db = 3.900000 MHz ± 35 kHz Selectable ON/OFF with interlace button Frame Selectable ON/OFF with burst button Line Chrominance signal D'r = -1.9 (E'r - E'y) Amplitude D'b = 1.
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- 49 - R–G–B OUTPUTS Impedance Amplitude G synchronisms Connector 75 Ω 0.7 Vpp 0.3 Vpp (selectable ON/OFF) BNC or Euroconnector SYNCHRONISMS OUTPUT Impedance Amplitude Polarity Connector 75 Ω 2.0 Vpp Positive or negative (selectable) BNC OSCILLOSCOPE TRIGGER OUTPUT 75 Ω Impedance 2.0 Vpp vertical, 1.5 Vpp horizontal Amplitude BNC Connector SOUND OUTPUT Impedance Amplitude Connector 1 kΩ 0.4 Vpp Euroconnector VIDEO INPUT Impedance Coupling Connector 10 kΩ Direct coupling Euroconnector EXTERNAL L.F.
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- 50 Video/sound carrier ratio Type of modulation (selectable) Pre-emphasis Modulation deviation Mode Dual Stereo Detection mode Pilot frequency Modulation Modulation index Identif. frequency 13 dB Int. FM (1 kHz) Ext. FM Max. 0.5 Vpp 50 µs 30 kHz 20 dB int. FM (3 kHz) Ext. FM Max. 0.5 Vpp 50 µs 30 kHz L (L+R)/2 R R 54.6875 kHz (3.5*fH) AM 50 % 274.1 Hz (fH/57) dual 117.5 Hz (fH/133) stereo MODULATION OF NICAM SOUND (OPTIONAL, OPT-698-4) ON/OFF selectable Carrier 5.850 MHz <± 30 ppm PAL B,G, L 6.
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- 51 LOGOTYPE GENERATOR Window position Charts A1 and A4 (logotypes) Charts A3 and C1 (VTR) VIDEO TEST RECORDER (VTR) VTR format Velocity 8-position mobile rectangle 1 position per image field POWER SUPPLY Mains voltage Power consumption AC 110-125-220-230-240 V ± 10% 50-60 Hz 20 W OPERATING ENVIRONMENTAL CONDITIONS Up to 2000 m Altitude From 5 to 40 ºC Temperature range 80% (up to 31 ºC), decreasing lineally up to Maximum relative humidity 50% at 40 ºC. MECHANICAL FEATURES Dimensions Weight W.
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- 52 - OPTIONS 90296981 90296982 90296983 90296984 OPT-698-1 OPT-698-2 OPT-698-3 OPT-698-4 Special logotype programming ZWEITON sound TELETEXT, VPS NICAM sound NOTE: According to I.E.
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- 53 - 2 SAFETY RULES * Use this equipment connected only to devices or systems with their common at ground potential. * This is a class I equipment, for safety reasons plug it to a supply line with the corresponding ground terminal. * This equipment can be used in CATEGORY II installations and Pollution Degree 1 environments. * When using some of the following accessories use only the specified ones to ensure safety.
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- 54 - * Symbols related with safety: DIRECT CURRENT ALTERNATING CURRENT DIRECT AND ALTERNATING GROUND TERMINAL PROTECTIVE CONDUCTOR FRAME TERMINAL EQUIPOTENTIALLITY ON (Supply) OFF (Supply) DOUBLE INSULATION PROTECTED (Class II Protection) CAUTION (Risk of electric shock) CAUTION REFER TO ACOMPANYING DOCUMENTS FUSE 05/96 GV-698
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- 55 - 3 INSTALLATION 3.1 Power requirements This equipment requires a mains power source of 110-125-220 or 230/240 V AC 50 to 60 Hz. Mains operating voltage can be selected at the rear panel. Figure 1.- Selection of mains voltage. 1.- Pull out the fuseholder lid. 2.- Set the proper fuse for the desired mains voltage. 3.- Insert the fuseholder lid so the [ A ] pointer faces the desired mains voltage display [ B ].
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- 56 - CAUTION: THE EQUIPMENT IS FACTORY SET FOR 220 V OPERATING VOLTAGE. BEFORE SWITCHING ON THIS INSTRUMENT, SET THE VOLTAGE SELECTOR TO THE PROPER POSITION AND BE SURE THAT THE FUSE VALUE IS ACCORDING TO THE MAINS VOLTAGE. FUSE TYPE SHOULD BE: 5 x 20 mm., 250 V. 0.5 A F 1AF FOR 220, 230 and 240 V FOR 110 and 125 V AVOIDING THIS DIRECTIONS COULD DAMAGE THE EQUIPMENT 3.
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- 57 4 OPERATING INSTRUCTIONS 4.1 Control description Figure 2.- Front panel. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] 05/96 LINE . Mains switch Row indicator Column indicator STO, RCL. Memory selector (recall/store) SEL. Rotary function selector (chart/system–standard/channel–frequency) Alphanumeric display TUNE SELECT . Rotary selector 10. 10 dB attenuator 20. 20 dB attenuator 20. 20 dB attenuator . RF output RF START .
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- 58 - Figure 3.- Rear panel. [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [40] [41] . Synchronisms output SYNC . Composite signal output for oscilloscope trigger TRIG. SCOPE . R signal output R . G signal output G . B signal output B Mains input EURO-AV . Euroconnector connector SYNC. G. G synchronisms ON/OFF selector . S–VHS output POLARITY . Synchronisms output polarity selector . External LF input connector LF MODULATION SOUND . Internal/external LF selector 4.
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- 59 4.2.1 Selection of TV standard Figure 4.– Selection of TV standard and memory. To select the desired TV standard follow the instructions below: 1) Press simultaneously the STO and RCL buttons corresponding to the group [4]. The data presentation on the alphanumeric display will change: on the left side the abbreviated denomination will appear, and on the right a complete description of the equipment system at that moment. 2) Select the desired system by means of the TUNE SELECT rotary selector [7].
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- 60 - ABBREVIAT. DENOMIN. COMPLETE DENOMINATION CARRIERS SEPARATION SOUND 1 SOUND 2 Pb PAL B/G/H 5.5 MHz - Pi PAL I 6.0 MHz - Pd PAL D/K 6.5 MHz - Pz PAL ZWEITON 5.5 MHz 5.742 MHz P# PAL I-NICAM 6.0 MHz 6.552 MHz P* PAL G-NICAM 5.5 MHz 5.850 MHz Sb SECAM B/G/H 5.5 MHz - Sd SECAM D/K/K1 6.5 MHz - Sl SECAM L 6.5 MHz (AM) - Nm NTSC M 4.5 MHz - EX VIDEO EURO-AV - - Table 1 4.2.
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- 61 - 4.2.3 Retrieving a configuration Take the following steps to retrieve the desired configuration: 1) Press the RCL button corresponding to the group [4] 2) The LED situated below the MEM position will light and the message "RCL XX" on the display will indicate that this option has been selected, "XX" indicating the number of the memory currently selected. 3) Select the memory position in which you wish to store the information by means of the TUNE SELECT [7] rotary selector.
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- 62 - 4.2.5 Chart selection Keep the SEL button corresponding to the group [5] pressed until the LED situated below the PAT indication is lit. The chart selected will be displayed in this position. Then turn the TUNE SELECT rotary selector [7] to move successively through the 32 charts that can be presented by the video generator. A column in letters (see column indicator [3]) and a row in numbers (see row indicator [2]) will appear on the visual display.
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- 63 - Group B.- - - B1 Colour bars B2 Horizontal colour bars B3 Luminance/Colour bars/Multiburst/DEM Composite chart for contrast control, tint control, definition and colour demodulators. B4 Colour bars / Scale of greys Saturation in optimal conditions for the adjustment of contrast and brightness. Group C.- - C1 C2 C3 C4 D1 D2 D3 D4 - - 05/96 Colour demodulator control, phase and delay line. E1 Antipal with split–field 50% luminance Adjustment of phase, delay line and colour demodulators.
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- 64 - Group G.- - - - Focus control, geometry and matt supply. G1 100% white Verification of the limiter circuit for the beam current, modulation adjustment on videotapes, measurements of the signal/noise ratio. G2 black Clamping check, measurements of the signal/noise ratio, adjustment of the level of black. G3 50 Hz rectangular Clamping circuits check. G4 MAT Very High Tension source control. Group H. - H1 Cross and rectangle Aspect, geometry and centrality ratio.
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- 65 - - IL. OFF [19] (Interlace): press this button to suppress the interlace and enable an easier check to be made of the vertical integration system of the synchronisms separator. In convergence adjustments a non-interlaced signal seems more suitable in order to avoid flicker. NOTE: When the SECAM system is selected, pressing this button permits the inclusion of the picture identification signal. 4.
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- 66 - The information transmitted on each chart is specified below: Information common to all charts: Day: Month: Time: Country: 01 01 01 Germany Information that varies in each row of charts: Row 1 Row 2 Row 3 Row 4 01 05 10 15 Minute Table 2. Information that varies in each column of charts: Program origin Stereo/Mono Fit/Not fit Col. A Col. B Col. C Col. D Col. E Col. F Col. G Col. H ARD Bundesweit ZDF Bundesweit 3rd PROG.
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- 67 - Logo recording is achieved by digitalizing a sample through a computer. At any rate, when applying for a logo, some questions should be taken into account. - Logos are located in fixed positions in the charts, Sizes and dimensions are described hereafter. a) Chart A1 Figure 6.- Logo position in chart A1. b) Chart A4 Figure 7.- Logo position in chart A4.
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- 68 - c) Chart B4 Figure 8.- Logo position in chart B4. Figure 9.- Logo position inside the window. - Only text generation and black-and-white logos availability has been designed. - Definition achievable from picture held in the screen is: Wide High Logo 1 416 points 64 lines Logo 2 312 points 32 lines Logo 3 52 points 32 lines Table 4. - Digitalizer's task will be reduced remarkably if contrast of that logo to be scanned is good.
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- 69 - - Limitations in the number of characters depends on character size. Unless otherwise directed by the customer in his order application, wording will be recorded in accordance with an aesthetic rule (using the greatest size allowed, horizontal and vertical centering inside a window). - Because of the scarce variety of letters available by the character generator, it would be preferable to send us a template with that wording to be included, if more definition letters are wanted.
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- 70 - Figure 11.- Logo board location. - Replace the current EPROM by the one included in the personalized logo. Figure 12.- EPROM position. - Be sure the IC notch agrees with the one drawn in the silkscreen print of the PC board. - Carefully insert pins properly in the socket. - In connecting the logo generating card again, special care is to be given in matching all board pins with card connectors (VERY IMPORTANT). - Set the board fastening bar again. - Lock the unit. WARNING: PROMAX S.A.
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- 71 - 4.6.3 Letter type The letter types available are the fonts of general use in Windows (i.e. Arial, Courier, Times New Roman, etc.).
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- 72 - 05/96 GV-698
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- 73 5 DESCRIPTION OF INPUTS AND OUTPUTS 5.1 Composite video output (BNC) The composite video output is achieved through the VIDEO connector [24] on the front panel. The polarity of the signal is positive and the synchronisms negative, the black level being 0 V. The amplitude may be varied by means of the video level control LEVEL [23] between 0 and 1.2 Vpp. In the "CAL" position, the amplitude is normalized at 1 Vpp.
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- 74 - By means of the POLARITY selector [39] its polarity (positive or negative) may be inverted in order to adapt it to the requirements of the monitor examined. 5.4 Trigger oscilloscope The trigger output for the oscilloscope is situated on the rear panel, through the TRIG. SCOPE connector [31]. At this output horizontal synchronisms are mixed with vertical ones of a different amplitude.
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- 75 - [1] [2] [3] [4] [5] Left channel audio output (not connected) Audio ground Left channel audio input Right channel audio output (not connected) Right channel audio input 5.7 S-VHS output This is via the 4-contact socket [38] on the rear panel. Separate luminance and chrominance outputs used in the S-VHS system are available. Their use as a high quality video standard is becoming more and more widespread and the quantity of television sets and video equipment incorporating them is increasing.
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- 76 - 5.8 Euroconnector (DIN EN 50049) Figure 15.- Euroconnector. Also known as SCART or PERITEL connector (according to the NF-C92250 norm). The output signals in this socket as follows: No.
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- 77 - 6 PRINCIPLES OF OPERATION 6.1 Circuit description This section deals with a general explanation of the operation of the GV-698. The items below refer to the block diagram and to the diagrams of the equipment. a) µC control Controls the presentation of the display according to the user's selections (chart, channel and frequency).
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- 78 - - PAL/NTSC modulator: the sum of the signal generated by two AM modulators. - SECAM modulator: FM modulation of the Dr and Db signals synchronized with the line frequency. The chrominance signal obtained is added to the luminance (delayed in SECAM). The composite video signal will be inverted or not, depending on the system selected, to be transmitted to the RF modulator input.
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- 79 - - Oscillators which generate the carrier frequencies needed for the two standards (B/G and I) of 5.85 MHz and 6.552 MHz are 90º out of phase and go to the inputs of the modulators. The outputs of the modulators are summed and will form the signal to be transmitted. l) RF modulator The radio-frequency signal is AM modulated by the video signal through a diode modulator.
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- 80 - 05/96 GV-698
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- 81 - 7 MAINTENANCE 7.1 Replacing the mains fuse The fuseholder lid is placed in the mains base (see figure 1) and it is the voltage selector. To substitute the fuse, disconect the power cord. With an appropiate screw driver remove the fuseholder lid. Substitute the melt fuse for another of: 0.5 A F, for 220, 230 and 240 V 1 A F, for 110 and 125 V When inserting the fuseholder lid be careful that the voltage selector is in the correct position according to the mains. 7.
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Send this ORDERING CARD to your supplier or to: P R O M A X, S.A. C/. Francesc Moragas, 71-75 08907 L'HOSPITALET DE LLOBREGAT BARCELONA (SPAIN) LOGO ORDERING CARD Please send and EPROM memory containing the logo described in the following template, for the text and logotype generator of the GV-698. SAMPLE TEMPLATE*: Logo 1 Logo 2 Logo 3 * If you are ordering a text, please specify the letter type Company..................................................................................................
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Send this ORDERING CARD to your supplier or to: P R O M A X, S.A. C/. Francesc Moragas, 71-75 08907 L'HOSPITALET DE LLOBREGAT BARCELONA (SPAIN) LOGO ORDERING CARD Please send and EPROM memory containing the logo described in the following template, for the text and logotype generator of the GV-698. SAMPLE TEMPLATE*: Logo 1 Logo 2 Logo 3 * If you are ordering a text, please specify the letter type Company..................................................................................................
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- 84 - 05/96 GV-698
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- 43 - TABLE OF CONTENTS 1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 1.2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 2 SAFETY RULES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 3 INSTALLATION . . . . . . . . . 3.1 Power requirements . . 3.
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- 44 - 05/96 GV-698