Crystal Vision TANDEM-300 User manual

Crystal Vision Ltd., Lion Technology Park, Station Road East, Whittlesford, Cambridge, CB22 4WL, England.

E-mail: [email protected] Website: www.crystalvision.tv Tel: +44(0) 1223 497049 Fax: +44(0) 1223 497059

TANDEM-300

Single embedder/de-embedder and audio

processor

Crystal Vision TANDEM-300 User Manual R1.2

1 14/02/2008

Contents

1Introduction 4

1.1Audio and data processing 7

External reference 8

Handling ancillary data 8

SDI PLL function 8

Factory defaults 9

Monitoring 9

1.2Rear connector options 10

1.3Applications 11

2Data packet management 13

2.1HANC processing 14

2.2EDH processing 14

2.3Vertical switching 15

Trading process speed for robustness 16

3Installing Statesman 18

3.1Installation 18

4Statesman operation 19

4.1Selecting single or dual-input 20

Audio routing 21

Setting audio delay 26

Adjusting channel gains 27

Preset Controls 27

SDI Crystal control 28

Recalling defaults 29

Miscellaneous 31

Using the Toolkit 32

Crystal Vision TANDEM-300 User Manual R1.2

2 14/02/2008

5The active control panel 33

6Using card edge controls 34

6.1Introduction 34

Main menus 34

The card edge display codes 35

TANDEM-300 display examples 36

Routing 36

Option cards fitted 36

SDI signal status 36

6.2Card edge status menus 37

General Status Only menus 37

Status/Config menus 38

Ancillary data status 39

Input and output trouble shooting status 39

6.3Selecting default routing 40

6.4Audio routing 41

Selecting groups 41

Selecting sources and destinations 43

Assigning delay/phase inversion and muting 43

Setting audio delays and silence detect delay 45

6.5Setting audio gains 46

6.6Audio monitoring 47

6.7Enabling/disabling GPI inputs 47

6.8Using presets 48

6.9Data packet management settings 49

Contiguous packing 49

Blanking HANC before embedding 49

Enabling EDH functions 49

Viewing ancillary data status 50

Error handling 51

Embedding formats and vertical switching 51

6.10Setting the stereo/dual mono status flag 52

6.11Adjusting AES/EBU output phase 53

6.12Assigning GPI outputs 54

Immediate alarms 54

6.13Selecting the PLL mode 56

6.14Operating mode 56

6.15Miscellaneous functions 56

Crystal Vision TANDEM-300 User Manual R1.2

3 14/02/2008

Firmware version number 56

7Installation 57

7.1Rear module connections 60

7.2Signal earthing 66

7.3Using GPI outputs 67

DTB-AV GPI connections 67

FR1AV GPI connections 68

FR2AV GPI Connections 68

7.4Monitoring Audio Outputs 69

Using monitoring outputs 70

7.5Fitting audio sub-modules 71

7.6Sub-module link settings 72

8Problem solving 79

8.1Card edge status LEDs 79

8.2Card edge error messages 79

8.3Statesman error reporting 80

8.4Sample problems and their solution: 81

8.5Card edge trouble shooting menus 82

Control cross reference 86

9Specification 87

Revision 2 RM36 connection information updated 09-01-08

Crystal Vision Introduction

TANDEM-300 User Manual R1.2 414/02/2008

1 Introduction

The TANDEM-300 (Twin ANalogue or Digital EMbedder/de-embedder) Audio

Processor is based on the TANDEM-100/200 architecture to provide audio-processing

functions for embedded, analogue and AES/EBU audio.

TANDEM-300 accepts either a single or dual SDI inputs with or without embedded audio

and may be equipped with up to two piggyback audio option cards to provide for

analogue or digital external audio inputs or outputs. Audio may be selected from any

input and routed to the SDI output for embedding or any audio output option card that

may be fitted.

The available audio processing functions are:

•Audio gain adjustment

•Audio replacement

•Channel swapping / shuffling

•Stereo to mono conversion

•Phase reversal

•Dual SDI inputs and dual de-embedders for to allow audio to be transferred

from second SDI input (Audio Bridge)

•Audio delay

TANDEM-300 basic architecture

The external digital reference is either Word Clock or an AES reference and is only used

for digital output option cards.

Crystal Vision Introduction

TANDEM-300 User Manual R1.2 514/02/2008

Additional functions include:

•audio source preview monitoring

•Correction and masking of corrupted audio data

•HANC processor for data packet management

•optional SDI ‘PLL’

•AES breakout for external processing

•external AES or word clock reference input for digital output modules

•EDH insertion on embedder and de-embedders

•control and status monitoring via board edge or frame/remote control panel or

Statesman

•buffered SDI and AES outputs

•audio error masking and protection in de-embedders – handles untimed or

asynchronous SDI with minimum corruption

•GPI control of configuration set-ups

Control is available from an active control panels (future option), the card edge or by

serial control from Statesman, a dedicated software application.

TANDEM-300 has a single SDI output and two SDI inputs. Up to two audio option cards

may be fitted in either of two positions. The terms Side 1 and Side 2 are used to describe

the option card positions.

The option card position for Side 1 is at the top of the modules and the slot for Side 2 is at

the bottom of the module. An 18 volt regulator option card is also required for analogue

input or output cards.

TANDEM-300 - sub-pcb or option card positions #1 and #2

The available option cards are:

•DIP2 – 2 x AES/EBU inputs for synchronous 48kHz audio, 75 Ohm, 110 Ohm,

HiZ

•DIP2RS – 2 x AES/EBU inputs with re-sampler for asynchronous audio (30 to

108kHz), 75 Ohm, 110 Ohm, HiZ

•DOP2-110 – 2 x AES/EBU outputs, 110 Ohm balanced, AES reference input

•DOP2-75 – 2 x AES/EBU outputs, 75 Ohm unbalanced, AES reference input

•AIP2 – Analogue dual stereo audio input

•AOP2 – Analogue dual stereo audio output

Crystal Vision Introduction

TANDEM-300 User Manual R1.2 614/02/2008

The card edge control interface uses a condensed code to refer to source and destination

functions when routing audio through the module.

The codes refer in practice to installed option cards and basic functions such as embedder

or de-embedder. These codes are introduced here to make understanding board edge

control easier.

Code Function in Mode 1 and other modes

A de-embedder SDI 1 (main SDI input)

B de-embedder (may be selected to provide de-embedded sources from SDI1 or

SDI 2 (second SDI input)

C embedder SDI 1

G input option SDI 2

H input option SDI 2

I output option SDI 1

J output option SDI 2

E De-embedder ‘A’ is renamed ‘E’ to indicate no option card fitted on ‘Side 1’

F De-embedder ‘B’ is renamed ‘F’ to indicate no option card fitted on ‘Side 2’

Note: If no option cards are fitted Codes E and F appear in the status display at the card edge

to replace de-embedder codes A and B for Side 1 and Side 2 respectively. However,

monitoring quality de-embedded audio is still output via the headphone socket and the

rear connector – refer to the Monitoring section for further details.

Crystal Vision Introduction

TANDEM-300 User Manual R1.2 714/02/2008

1.1 Audio and data processing

The main 16 x 4 embedding router is designed to selected either stereo or combined

(mono) de-embedded signals to any of the four channel outputs destined to be re-

embedded in the SDI signal.

Two de-embedders are provided to enable TANDEM-300 to work in either single or dual

SDI input mode.

In single SDI mode four channels may be de-embedded from two groups from SDI input

‘1’. In dual SDI mode, four channels are de-embedded from one group from SDI input 1

and four channels are de-embedded from one group from SDI input ‘2’. Any of these de-

embedded signals may be assigned to outputs by TANDEM-300s built in routers.

TANDEM-300

Routed audio can be delayed up to 0.68 seconds for each channel pair sent to the output

embedder. The audio channels can also be muted, adjusted for gain from 0 to 8 times

unity gain and inverted.

The de-embedded audio may also be routed independently of the main embedding router

to any output option cards that are fitted. The 4 x 4 external audio output routers cannot

produce mono signals but can invert or mute the analogue or digital audio outputs.

Crystal Vision Introduction

TANDEM-300 User Manual R1.2 814/02/2008

External reference

Digital output option cards may be used with an external word clock or AES reference.

Link jumpers are provided on the digital option cards to select 110 Ohm, HiZ or 75 Ohm

impedance.

Handling ancillary data

Ancillary data can be placed in both the vertical and horizontal blanking intervals of the

serial component video signal (SDI). The vertical ancillary data space or VANC is used

for such data as VITS or VITC whilst AES/EBU digital audio data is embedded in the

horizontal blanking data interval or HANC. Data packet management provides controls to

choose how new audio packets created for re-embedding audio are inserted into the

HANC data space.

Data packet management provides the following ancillary data handling options:

•Support for contiguous HANC data packing

•Automatic mark audio group for deletion

•Blank entire HANC data space, except the EDH insert

•Wide range of formats to embed on all HANC lines or leave a gap around the

vertical switching point

•Variable error masking and error handling

•Enable or disable EDH processing

Details of HANC processing and EDH processing can be found in the Data Packet

Management chapter.

SDI PLL function

There is a single PLL module, like a ‘time base corrector’ that may be inserted into the

SDI output path.

The SDI signal accumulates an ever-increasing amount of jitter as it progresses through

an SDI installation, and as it passes through most equipment in its path. To minimise this

effect, TANDEM-300 has an SDI crystal controlled re-clocker which sets the output SDI

signal to the same mean frequency as the input, but re-clocked by a crystal controlled

Phase Locked Loop [PLL]. This produces extremely low jitter in the SDI output, even in

the presence of a very high level of jitter in the incoming signal. Typically, jitter of 1 or 2

nanoseconds peak to peak will be reduced to a few hundred picoseconds.

Crystal Vision Introduction

TANDEM-300 User Manual R1.2 914/02/2008

Factory defaults

A facility is provided at the card-edge to load ‘factory defaults’ for routing, delay and

preset data into TANDEM’s non-volatile memory. It is strongly recommended that the

appropriate factory defaults be loaded after any of the following:

•whenever sub-PCB cards have been changed

•at any time card edge or other menus appear corrupted

Please refer to the Statesman ‘Recalling Defaults’ or the card edge section 6.3 for details

of the available factory defaults that may be recalled.

Note: Always check that the appropriate groups are selected for embedding or de-embedding

after loading defaults (refer to Statesman ‘Audio Routing’ or section 6.4 for card edge

controls).

Monitoring

TANDEM-300 is equipped with two monitoring outputs:

•analogue headphone output

•analogue or AES rear connector output

The rear connector output is fed from a monitoring ‘bus’ that may be switched between

OFF (silence or high impedance), a copy of the analogue headphone output or an

automatically assigned AES output. The rear connector monitoring may be used to extract

a ‘breakout’ monitoring quality output, when an output option card is not fitted.

The analogue output can be manually selected as adjacent pairs or routed using the in-

built routing to extract non-adjacent signals from the same group.

The AES output monitors the following audio:

•de-embedded audio if a Demux (de-embedder) is enabled

•audio routed to an output option card if the Demux (de-embedder) is disabled

•audio silence if Demux (de-embedder) is disabled no output option-card is fitted

Note: The analogue monitoring output can provide a Demux output even if an output option is

not fitted.

Setting all but a selected card’s monitoring BUS to OFF allows multiple TANDEM or

Demon cards to be selectively monitored.

The AES monitoring bus may be used for re-processing. AES signals can be fed to a

gain control, compressor or other process and then fed back into a digital input card for

further TANDEM processing or routing.

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