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INSTALLATION and OPERATION
© Vistek Electronics Ltd
Filename: V1682OPMA.doc
Issue :
A
Date:
February 2005
VISTEK Electronics Ltd
Wessex Rd
Bourne End
Buckinghamshire, SL8 5DT
ENGLAND
Tel.
+44 1628 531221
Fax.
+44 1628 530980
Web:
www.vistek.tv
17 February, 2005
V1682
VALID READER
V1682OPMA.doc
Page 1 of
32
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Table of Contents
Summary of Contents for VISTEK V1682
- Page 1 V1682 VALID READER INSTALLATION and OPERATION © Vistek Electronics Ltd Filename: V1682OPMA.doc Issue : Date: February 2005 VISTEK Electronics Ltd Wessex Rd Bourne End Buckinghamshire, SL8 5DT ENGLAND Tel. +44 1628 531221 Fax. +44 1628 530980 Web: www.vistek.tv 17 February, 2005 V1682OPMA.doc...
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Page 2: Table Of Contents
Display Control .......................... 17 4.6.3 Delay and Source Display ......................17 4.6.4 PPM Audio Level Meters ......................17 Audio Processing........................... 17 V1682 Audio Overview ........................17 Audio Input Selection........................17 Audio Multiplexing..........................17 MUTE..............................17 Video Processing ........................... 17 Video Processing Overview......................17 VBI Blanking ............................. - Page 3 Multiplexer Status ..........................17 GPI Status............................17 Firmware Versions..........................17 CALIBRATION ............................17 SET-UP............................. 17 FREE-RUN FREQUENCY........................ 17 ANALOGUE AUDIO SUB-MODULES....................17 8.3.1 DAC ............................17 8.3.2 ADC ............................17 CONFIG MENU............................17 FRONT PANEL MENUS........................17 CONTROLs............................17 11.1 VALID Measurements - MEASURE ....................17 11.2 On Screen Display Controls –...
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Page 4: Description
The V1682 reader is the counterpart of the V1681 generator, which together, make up the VALID (Video & Audio Line-up and ID) system. The function of the V1682 is to detect the presence of a VALID test signal, and verify that the audio/video timing has been preserved, and that the audio channels have not been swapped, or inverted. -
Page 5: Installation
2. INSTALLATION Due to the large amount of IO available on the V1682, a variety of rear panels are available. Presently there are four; two for the 3U chassis, V1606, and another two for the 1U chassis, V1601. The L type rears provide most of the possible facilities, except for the last two SDI outputs, but the audio connections are on a less convenient multi-pole connector. -
Page 6: Rear Panels
2.2 1 U REAR PANELS For the 1U Chassis two types of rear panel are also available. The 16VR1L provides connections for all possible I/O using a high density D-type connector for the audio and other ancillary signals, such as GPI and AES reference. -
Page 7: Aes Bncs
The 16VR1P and 16VR3P panels have a separate Molex connector for external GPI connection. (On the other panels the Audio I/O connector is used.) The connections are: Signal GPI 1 GPI 2 GPI 3 The GPI inputs are currently unused on the V1682. 1 March, 2005 V1682OPMA.doc Page 7 of 32... -
Page 8: Signal Specifications
2.4 SIGNAL SPECIFICATIONS SIGNAL TYPE COMMENTS Power (No Module) 9.8W Supplied from rack Power (A-A Module) 12.5W Supplied from rack Power (A-D Module) 12.5W Supplied from rack Power (D-A Module) 11.7W Supplied from rack Power (D-D Module) 10.6W Supplied from rack Power (H-H Module) Supplied from rack SDI Inputs and Outputs... -
Page 9: Links And Switches
FS 1 EPROM AUDIO SUB-MODULE SKT 1 2.5.2 Links and Switches The purposes of the links and switches is shown in the following table. Details of their operation are described in later sections. ITEM Title Comments FS 1 Fuse In series with the +15V input to the module. SW 5 RESET Used to reset the internal micro-controller and DSP. -
Page 10: Front Panel
VALID Reader The front panel on the V1682 is a considerable advance on what is usually available on single module interface equipment. It provides the user with total control and monitoring of the unit without the need to consult manuals and read unlabelled indications. While this kind of control is generally available with a remote control system, as it is over DART, it is unusual to have this level of access locally. -
Page 11: Display And Switches
Various audio sub-modules are available for the V1682 depending on the audio requirements. To change the module remove the V1682 from the chassis and carefully remove the existing one, if fitted, by lifting evenly at both ends. To fit a new one check the orientation by aligning the offset connectors and place the module carefully. -
Page 12: System Operation
3.1 LOCAL CONTROL 3.1.1 Start up Local control and monitoring of the V1682 is done through the front panel with its eight character LED display and three control buttons Select, σ and τ. There are three LEDs which also contribute to the status indication;... -
Page 13: Menu Examples
3.1.3 Menu Examples This section has examples of how to manoeuvre through the menu system. The first one starts with the unit in its ‘sleep’ mode where the display is blank, and then proceeds to set the output Multiplexer to use group 2. The sequence assumes that audio channels are ganged. Action Display Comments... -
Page 14: Making Measurements
NPUT The V1682 accepts a CCIR601 SDI input through on of its two** inputs. Selection of the video input is done under the VID OSD > SDI Src menu option. If only one input is available, this control is not adjustable. -
Page 15: Audio Input
1234ms to achieve correct lip-sync. If the audio is coming from the audio output of the V1681 that corresponds to the V1682 input, then the delay is all that will be displayed. If, however, the audio source is incorrectly connected, then the display will continue showing the delay for the channel, and will also flash up, at approximately 2s intervals, an indication of what the connection problem is. -
Page 16: Measurement Menu
(See Sec. 4.4, page 16). It is also important to note that the V1681 VALID generator always generates a tone level of 0dBu on analogue outputs, and the equivalent digital level dependant on the MAL setting of the V1681. It is important that the MAL of both the V1681 and V1682 are set up correctly. -
Page 17: Display Control
VALID test pattern has been detected. The delay measurements on the right hand side (d) show dashes, as the delay is not calculable. a - V1681 audio output is connected to the correct V1682 audio input b - Delay bar showing no delay. c - Delay showing 0ms d - VALID symbol and tick, indicating the presence of a VALID test pattern. -
Page 18: Ppm Audio Level Meters
- V1681 output b - V1682 input c - Delay bar d - Video to audio delay in milli-seconds e - VALID and tick, indicating VALID test-pattern detected. f - Audio inversion symbol Figure 4.3 – Channels A and B swapped over, audio 35ms earlier than video, with audio on BL input is inverted. - Page 19 Figure 4.5 – Audio PPM display It should be noted that the display is always in dBu (relative to 0.775V) irrespective of the input domain (analogue or digital), more importantly, the levels are effected by the MAL (Maximum Analogue Level) setting if a digital input format is being used.
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Page 20: Audio Processing
4 individual channels. When a group has audio data embedded on it is termed occupied, and when it does not have embedded audio data on it is called free. The V1682 has the ability to embed the selected audio input into the SDI stream on any of four available groups, this is with the restriction that groups cannot be overwritten, without first blanking the whole ancillary data space. -
Page 21: Mute
data is already embedded, it may be removed by setting ENG’ING > Anc Data to ‘blank’, see Sec. 6.3 for more details. If the selected multiplex group is already occupied, no audio will be embedded, and the input group will be passed through. The groups which are occupied on the input SDI can be checked in the STATUS >... -
Page 22: Video Processing
ROCESSING VERVIEW Video passed through the V1682, other than the on screen display keying, encounters very little processing. However the vertical blanking interval, and ancillary data space may be independently blanked, and EDH may be inserted. These controls are available irrespective of on screen display insertion. -
Page 23: Status Menu
NPUT The V1682 has an optional second SDI input. It can be determined from the front panel whether this input is present or not in the STATUS > SDI I/P2 menu. This will report SDI 2 OK if the second SDI input is available, or SDI 2 NA if it is not. -
Page 24: Embedded Groups
For further information on ancillary blanking, see Sec. 6.3. 7.8 GPI S TATUS Although GPIs are currently unused on the V1682, this status indicates the levels of the 3 GPI inputs to the unit (an up arrow indicating that the input is held high). 7.9 F... - Page 25 STATUS Videover 0.00.00 The Video FPGA data 1 March, 2005 V1682OPMA.doc Page 25 of 32...
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Page 26: Calibration
8. CALIBRATION This section describes how to calibrate the unit as it is done in the factory. The V1682 and its modules do not contain any potentiometers, but like most equipment with analogue parts still needs to be calibrated. Normally this calibration is done in the factory and should not need to be repeated in the field but this section describes the procedure and is included for completeness. -
Page 27: Analogue Audio Sub-Modules
8.3 ANALOGUE AUDIO SUB-MODULES The audio sub-modules with analogue interfaces, both inputs and outputs, need to be calibrated. This operation is to ‘trim out’ the small errors in the components. The ADC and DAC sections are adjusted separately, but if an A-A module is fitted then the DAC adjustment should be done first. -
Page 28: Config Menu
9. CONFIG MENU The CONFIG contains has no user adjustable controls. The only function of this menu is to set the unit into a diagnostic ‘test’ mode. In order for the unit to be put into test mode, a password is required. This should not be attempted by the user, and will provide no useful information. -
Page 29: Front Panel Menus
10. FRONT PANEL MENUS The next section shows the menus available on a V1681. Some menu items may only appear with certain configurations. Sleep VALID RD SDI stat AL stat AR stat BL stat BR stat MEASURE VID OSD AUDIO STATUS ENG’ING CALIB... -
Page 30: Controls
11. CONTROLS These tables show a complete list of all the parameters that can be controlled locally for the various configurations. Unless otherwise shown they can also be controlled over the DART remote control system. Not all menus are available at any one time, since they depend on which module type may be fitted, and sometimes on the operating conditions. -
Page 31: Operating Conditions - Status
11.4 STATUS – PERATING ONDITIONS STATUS Sub-Mod DI/O+DO For example: Digital Input & Output Mod I/Ps ---- ⊓ ⊔ Mod O/Ps ABAB ⊓ ⊔ IP 625 3 SDI I/P IP 525 3 IP FAIL AES A AES A OK No AES A AES B AES B OK No AES B... -
Page 32: Configuration - Config
11.6 CALIB – ALIBRATION CALIB Cal Mode CntrFreq Frq=+20 Free-run Frequency DAC A(L) -128 +127 DAC A(R) -128 +127 DAC B(L) -128 +127 DAC B(R) -128 +127 ADC A(L) -128 +127 ADC A(R) -128 +127 ADC B(L) -128 +127 ADC B(R) -128 +127 11.7...
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