pro bel TX 520 Manual

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Co on nt te en nt ts s
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1 I In nt tr ro od du uc ct ti io on n 5 5
1.1 Typographicalconventions 5
1.2 Abbreviations 6
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2.1 Layout of theTX520 8
2.2 Source selectionbusses 9
2.3 Source names 10
2.4 Video/audio breakaway 11
2.5 The unity gainbuttons 11
2.6 The plasma display 11
2.7 Downstream keyers 13
2.8 OptionalDVE 13
2.9 Audio-overs 13
2.10 Video/audio monitoring 14
2.11 Machine control 14
2.12 Automationcontrol 14
2.13 Bypass switcher control 15
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3 M Ma ak ki in ng g a a P PG GM M/ /P PS ST T t tr ra an ns si it ti io on n 1 16 6
3.1 Selecting sources onpreset (PST) 17
3.2 Selecting the transitiontype and rate 18

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3.3 Taking a transitionto air 20
3.4 Taking married video/audio witha pre-rolled
machine 22
3.5 Taking married video/audio witha manually
rolled machine 23
3.6 Leading inaudio before video 24
3.7 Manually holding anautomated transition 25
3.8 Manually taking anautomated transition 25
3.9 Switching on-air to black/silence 26
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4 U Us si in ng g d do ow wn ns st tr re ea am m k ke ey ye er rs s 2 27 7
4.1 Manually taking a DSK to air 27
4.2 Taking a DSK from air 28
4.3 Setting a DSK to follow the next transition 29
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5 U Us si in ng g t th he e D DV VE E 3 30 0
5.1 Selecting a DVE sequence 31
5.2 Previewing a DVE sequence 31
5.3 Taking a DVE sequence to air 32
5.4 Taking a DVE sequence from air 32
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6 U Us si in ng g a au ud di io o- -o ov ve er rs s 3 33 3
6.1 Setting up audio-overs 34
6.2 Adjusting the audio-over levels 35
6.3 Previewing anaudio-over 36
6.4 Taking anaudio-over to air 37

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6.5 Taking anaudio-over from air 38
6.6 Setting the audio-over to follow the next
transition 39
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7 M Mo on ni it to or ri in ng g u us si in ng g t th he e A AU UX X b bu us ss se es s 4 40 0
7.1 Monitoring sources viaAUX1 41
7.2 Monitoring sources viaAUX2 42
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8 U Us si in ng g t th he e a au ud di io o m mo on ni it to or ri in ng g 4 43 3
8.1 Monitoring anaudio source 44
8.2 Monitoring inmulti-levelenvironment 45
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9 U Us si in ng g m ma ac ch hi in ne e c co on nt tr ro ol l 4 46 6
9.1 Controlling a dedicated machine 47
9.2 Controlling a routed machine 48
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11 1 U Us si in ng g t th he e b by yp pa as ss s s sw wi it tc ch he er r c co on nt tr ro ol l 5 51 1
11.1 Using the bypass switcher panel 52
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12 2 U Us si in ng g t th he e p pl la as sm ma a d di is sp pl la ay y 5 53 3
12.1 Stop watchand timer modes 56
12.2 Screens accessible from the home page 59
1
13 3 S Se el le ec ct ti in ng g w wi ip pe e p pa at tt te er rn ns s 6 61 1
13.1 Setting wipe pattern, directionand softness 61

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14 4 S Se et tt ti in ng g u up p t th he e D DS SK Ks s 6 63 3
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15 5 A Ad dj ju us st ti in ng g a au ud di io o l le ev ve el ls s 6 66 6
15.1 Setting up the audio gainfor a source 68
15.2 Temporarily restoring unity gain 69
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16 6 S Se et tt ti in ng g u up p m mu ul lt ti i- -l le ev ve el l a au ud di io o r ro ou ut ti in ng g 7 70 0
16.1 Viewing the current audio routing 70
16.2 Editing the audio routing 72
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17 7 U Us si in ng g m mu ul lt ti i- -c ch ha an nn ne el l c co on nt tr ro ol l 7 74 4
17.1 Selecting multiple channels 75
17.2 Controlling multiple channels 76

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1 I In nt tr ro od du uc ct ti io on n
This user guide has beendeveloped for operators of Pro-Bel’sTX520 Master
ControlSwitcher. Chapter 2 provides anoverview of theTX520, withsubsequent
chapters giving details and step-by-step instructions for using various features of
theTX520.
Other documentationmay be required, depending onhow the
TX520 is set up. For example, the technicalmanualprovides informationonthe
configurationscreens whichare not detailed inthis operators guide.
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n 1 1. .1 1 T Ty yp po og gr ra ap ph hi ic ca al l c co on nv ve en nt ti io on ns s
Certainconventions are used inthis guide to indicate different types of information.
Names of buttons and controls ontheTX520 are showninthis guide inbold
capitals, withinbrackets, like this : <VIDEO ONLY> .
Procedures are shownas numbered steps, for example:
1This is what to do first to perform this operation.
This states what happens or other related information.
2Thendo this.
This states what happens.
Pictures/diagrams are also provided to show screens and/or buttonlocations
relevant to the procedure.

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Withinthis document the following abbreviations and acronyms are used:
PST Preset
PGM Programme
RTC RealTime Clock
TOD Time Of Day
TC Time Code
VU Volume Meter
PPM Peak Program Meter
dBFS Decibels at Full Scale
dBuDecibels
AUXAuxiliary
DSK Downstream Keyer
FTB Fade to Black
PIN PersonalIdentificationNumber

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Pro-Bel’sTX520 DigitalMaster ControlSwitcher is a self-contained component
digitalvideo andAES/EBU audio transmissionmixing system. It is normally
operated from the controlpanelbut canbe remotely controlled by anautomation
system. It canbe set up to support single or multi-levelaudio.
TheTX520 canbe used for:
·Making transitions of sources to air using cuts, various fade/take
combinations and wipes (see chapter 3).
·Adding downstream keys (see chapter 4).
·Defining and making audio-overs (see chapter 6).
·Monitoring audio and video sources (see chapters 7 and 8).
·Correcting audio levels (see chapter 15). TheTX520 canalso be set up to
support multi-levelaudio, allowing editing of the audio routing and selection
of the audio levelto monitor onthe audio monitoring speakers (see chapter
16).
·AnoptionalDVE is also available, providing up to 24 pre-programmed
moves (see chapter 5)
Aplasma display (see chapter 12) provides dynamic monitoring of audio levels
and controlof system parameters. Inaddition, the plasma display is used for
system setup and configuration.
Configurationdetails are provided inthe technicalmanual.
Two auxiliary busses (see chapter7) allow previewing of sources without affecting
the preset or programme selections. Two independent dualchanneloutputs
provide audio monitoring (see chapter 8).
From theTX520 console, up to three remote machines canbe controlled directly
(for example, VTRs, laser disks, etc.), or up to 20 sources if theTX520 is
connected to anRS422 router.
TheTX520 canbe operated manually or integrated witha stationautomation
system (see chapter 10).
For fail safe operations, anexternalbypass switcher may be controlled from the
TX520 (see chapter 11).

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The above diagram of theTX520, shows the buttons and controls that are grouped
for various operations. The numbers inthe diagram correspond to those included in
the following explanations.
BYPASS SWITCHER
MONITOR1
MONITOR2
MACHINE CONTROL AUTOMATION
AUX
PGM
PST
0
0
0
AUX SELECT
OVER
PGM
OVER
520
1
13
2 3
5
4
6
7
8
9
10
11
15
12
14

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The upper console includes:
(1) bypass switcher controland (13) buttons for selecting the audio levelto monitor
(if theTX520 is configured for multi-levelaudio), (14) the buttons for multi-channel
control(if connected), (2) the plasma display, and (3) audio monitoring control.
The top row of the lower console includes:
(4) Machine control.
(5) Automationcontrol.
(6) The <BLACK/SIL> button, permitting the output to be faded or cut to
black/silence.
The centre of the lower console includes:
(7) Source selectionbusses - AUX, PGM, and PST- and the source name display
for all the busses. At the end of eachrow of source selectionbuttons, a single
small buttonis used for controlling unity audio gainfor that bus.
(8) Buttons for selecting the auxiliary bus (AUXSELECT), either AUX1 or AUX2.
(9) Audio-over control.
The bottom row of the lower console includes buttons for:
(10) selecting a transitiontype, (11) taking sources to air, to (12) downstream
keyers (DSK1 to DSK4) and (15) DVE controls.
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n 2 2. .2 2 S So ou ur rc ce e s se el le ec ct ti io on n b bu us ss se es s
There are four source selectionbusses, operated throughthree rows of source
buttons, located inthe black background onthe lower console. TheTX520 can
have up to 20 sources accessible to eachbus. Anadditionalfour sources are
available throughthe auxiliary busses for monitoring independent sources, for
example, audio-overs, DSK and DVE previews, etc.

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Au ux xi il li ia ar ry y b bu us ss se es s
The white keys (AUX) provide access to sources for either of two auxiliary busses
(AUX1 or AUX2), depending onwhichAUXSELECTbuttons are lit. The auxiliary
busses are used for monitoring sources (see chapter 7).
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Pr ro og gr ra am mm me e b bu us s
The red keys (PGM) are the selectionbuttons for programme, the sources that
may be takento air. Pressing a PGM buttontakes that source to air immediately.
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Pr re es se et t b bu us s
The yellow keys (PST) are the source selectionbuttons for the preset. Preset
indicates whichsources will be on-air whena take is made, lighting up the
corresponding sources onPGM (see chapter 3).
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n 2 2. .3 3 S So ou ur rc ce e n na am me es s
The 4-character alphanumeric name for eachsource is showninthe row of
displays betweenthe red programme (PGM) buttons and the yellow preset (PST)
buttons.
The displayed source names canbe assigned or changed by using the plasma
display (refer to the technicalmanual). Alternatively, they canbe downloaded from:
·Acentralassignment routing system employing a System 3 controller.
·Anexternalautomationsystem.

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Pressing a single source buttononPSTor PGM selects married video/audio for
that source (provided the <VIDEO ONLY> and
<AUDIO ONLY> buttons are not lit). The buttonpressed will light at full
brightness.
Video/audio breakaway is achieved by using the <VIDEO ONLY> or the <AUDIO
ONLY> buttons. First press the <VIDEO ONLY> or the <AUDIO ONLY> button
followed by a source selectionbutton.
Afully bright source button indicates the selected video source.
Ahalf bright source button indicates the selected audio source.
OnAUX1, married or separate video and audio sources are selected using the
AUXSELECTbuttons (see chapter 7). AUX2 is always married.
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n 2 2. .5 5 T Th he e u un ni it ty y g ga ai in n b bu ut tt to on ns s
To the right of eachrow of source selectionbuttons, a single buttonindicates the
status of unity audio gainfor the selected source. If the unity gainbuttonis lit, the
source is not at unity gain.
The source canbe temporarily set to unity audio gain(see chapter 14) by pressing
the unity gainbutton.The buttonis no longer lit. To permanently correct the source
levelit is necessary to use a screenonthe plasma display to set the values (see
chapter 14).
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The plasma display, inthe middle of the upper console, is used to:
·Monitor audio levels of the source selectionbusses.
·Define audio, DSK, wipe and DVE setups.
·Configure theTX520 for the site.

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Th he e h ho om me e s sc cr re ee en n
The home screen(see chapter 12) is the top levelscreen. It shows the dual
channelaudio levels for the busses, a stop watchor timer, and stationclock.
It is possible to returndirectly to the home screen(regardless of the screen
currently displayed) by using the <HOME> button.
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Bu ut tt to on ns s a an nd d c co on nt tr ro ol ls s f fo or r t th he e d di is sp pl la ay y p pa an ne el l
The row below the plasma display includes, from left to right:
·The <PAGE> button. Onscreens where other pages are available, a small
rectangle appears above this buttonindicating it is active. For multi-level
audio systems, pressing the <PAGE> buttoncauses the display of audio
information(for example, onthe home screen) to change from one levelto
another. For single-levelaudio systems, this buttonhas no function.
·Four controls, used for selecting values inthe various configuration
screens. Turning a controlclockwise increases the value. Turning it anti-
clockwise reduces the value.
·The <HOME> button. For operationalscreens, pressing <HOME> once re-
displays the home screen.
The square grey buttons inthe verticalrows to the left and right of the plasma
display change functionaccording to the screendisplayed onthe panel. Labels for
active buttons are shownalong the left and right edges of eachscreen.
<PAGE> button <HOME> button

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For example, onthe home screen:
The left verticalcolumnhas three buttons for using the stop watch(see
chapter 12), and one for accessing the system configurationscreens.
The right verticalcolumnincludes buttons for moving to other screens:
wipe screen(see chapter 13), DSK screen(see chapter 14), and the audio
(gain) setup screen(see chapter 15).
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TheTX520 provides up to four independent downstream keys, DSK1 to DSK4
(see chapter 4). Keys canbe cut or faded to air. DSK transitions canalso be set to
follow the next video or DVE transition.
All DSK's are fully linear and have separate controlof clip and gain, as set up
using the plasma display.
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n 2 2. .8 8 O Op pt ti io on na al l D DV VE E
AnoptionalDVE is available for theTX520 (see chapter 5). This provides up to
24 selectable DVE moves for onscreensqueeze effects.
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n 2 2. .9 9 A Au ud di io o- -o ov ve er rs s
TheTX520 provides powerfulaudio-over facilities (see chapter 6), using two
controls whichdetermine the programme and over levels whenthe over is cut or
faded to air:
·<OVER> controls the gainof the over source.
·<PGM> sets the levelof programme audio to be mixed withthe over
source.
Any one of four externalover sources are available throughtheTX520, witheach
source having its ownsettings for <OVER> and <PGM> level.

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The over source canbe cut or faded to air by pressing a single button.The fade
rate is defined througha screenonthe plasma display. It canalso be set to follow
the next video or DVE transition.
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Two auxiliary monitoring busses, AUX1 andAUX2, canbe accessed directly from
theTX520 (see chapter 7).
AUX1 canhave separate or married video and audio. AUX2 has married video
and audio only.
For audio monitoring (see chapter 8), there are two sets of dualchanneloutputs
selecting PGM, PST,AUX1, AUX2, or off-air/externalsources. The audio levelfor
eachcanbe cut or dimmed via dedicated buttons, witha variable controlfor
volume
If theTX520 has beeninstalled to support multi-levelaudio, eight pushbuttons
allow the selectionof the audio levelto be heard onthe maincontrolsystem
speaker outputs.
The first four buttons allow selectionof the stereo audio channelfor the monitor 1
speaker.The last four buttons are for selecting those for the monitor 2 speaker.
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TheTX520 allows controlof connected machines (for example, VTRs) either
directly throughbuttons onthe controlpanelconsole.
Three buttons are used to elect the machine to be operated. The way this works
depends onhow theTX520 is installed. The buttons canbe dedicated to three
directly connected machines or they canbe connected to anexternalrouter,
allowing controlof up to 20 machines.
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If the installationhas anautomationsystem (for example, the Pro-BelCompass
System), the following features of theTX520 canbe controlled automatically:
PSTsource selection.
Transitiontype and rate.
DSK and audio-over.
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TheTX520 provides controlof anexternal8 x1 bypass switcher independent
from the paneland the controlsystem.

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3 M Ma ak ki in ng g a a m ma an nu ua al l t tr ra an ns si it ti io on n
This chapter describes how to set up the next transitionmanually and take it to air.
If theTX520 is connected to a presentationautomationsystem, for example, Pro-
Bel’s Compass system, the programme canbe setup and takento air
automatically.
AUX
PGM
PST
Innormaloperationtransitions are made by:
1 Selecting the video and audio sources (see chapter 2). These are first
selected onthe preset (PST) bus.
2 Selecting the transitiontype and speed by pressing white buttons in
the bottom row onthe lower console.
3 If desired, selecting one or bothDSKs (see chapter 4) and anaudio-over
(see chapter 6) to follow the transition.
4 Taking the transitionby using red buttons inthe bottom row onthe lower
console. A transitioncanalso be held manually.

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n 3 3. .1 1 S Se el le ec ct ti in ng g s so ou ur rc ce es s o on n p pr re es se et t ( (P PS ST T) )
It is preferred practice to set up the transitiononthe preset (PST) bus. The
selectioncanbe either select married video/audio from the same source (see
Step1 below), or video and audio from different sources (see Steps 2 and 3).
At the bottom left of the lower console, the <VIDEO ONLY> and <AUDIO ONLY>
buttons are used for setting up video/audio breakaway.
1To select married video/audio, first ensure that neither
<VIDEO ONLY> nor <AUDIO ONLY> is lit. Thenpress the required source
selectionbuttononthe PSTbus.
The PSTsource button is lit at full brightness.
PST
2To select only a new video preset, select the video by pressing <VIDEO ONLY>
to light it, thenpress the required source buttononthe PSTbus.
The newly selected source button is lit at full brightness indicating video
only selection. The original source button is lit at half brightness, indicating
audio only.
3To select only a new audio preset, press <AUDIO ONLY> to light it and then
press the source buttononPSTfrom whichyouwant the audio.

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The newly selected source button is lit at halfbrightness indicating audio
only selection. The original source button is lit at full brightness, indicating
video only.
Note: The <AUDIO ONLY> and <VIDEO ONLY> buttons canbe configured to be
either manually or automatically cancelled after selection. Refer to the technical
manualfor details.
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3. .2 2 S Se el le ec ct ti in ng g t th he e t tr ra an ns si it ti io on n t ty yp pe e a an nd d r ra at te e
The type and speed of a transitionare selected by pressing buttons inthe lower
console. These buttons are configured using screens onthe plasma display. For
details refer to the technicalmanual.
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Se et tt ti in ng g u up p t th he e t tr ra an ns si it ti io on n
The type and speed of transitionare selected by pressing the appropriate
transitiontype white buttoninthe bottom row of the lower console.
The available transitiontypes are indicated by the buttons (from left to right):
<CUT> Cut directly to the selected sources without fading or using a wipe.
<V FADE> Fade out the current programme to black and thenfade inthe new
programme.
<TAKE/FADE UP> Cut the current programme and thenfade inthe new
programme.
<FADE DOWN/TAKE> Fade out the current programme and thencut inthe new
programme.
<MIX> Fade out the current programme and at the same time fade inthe new
programme.

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<WIPE> Use the currently set up wipe pattern, directionand softness. The current
wipe patternis showninthe top right of the home screenonthe plasma display
(see chapter 13).
The audio will perform a mixif <WIPE > is pressed for the selected transition.
Note: If a fade transitionis selected (either <V FADE>,
<TAKE/FADE UP> or <FADE DOWN/TAKE>), and the <TAKE> or <PRE-
ROLL&TAKE> buttonis pressed and held down, the transitionwill stay at the
intermediate black/silence until the <TAKE> or
<PRE-ROLL&TAKE> buttonis released.
1Select the type of transitionby pressing <CUT>, one of the four fade patterns,
or <WIPE>.
2If <WIPE> was selected at step 1, the current wipe patternshowninthe top
right-hand corner of the home screenwill be used.
To change the wipe pattern, direction or softness, see chapter 13.
3Select the transitionrate for a fade or wipe by pressing one of <SLOW>,
<MED> or <FAST>.
The selected transition rate button is lit.

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Note: The rates inframes per second are displayed onthe DSK screen(see
chapter 12) To change these rates refer to the technicalmanual. One or two DSKs
(see chapter 4) plus anaudio over (see chapter 6) canalso be added to the
transition.
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n 3 3. .3 3 T Ta ak ki in ng g a a t tr ra an ns si it ti io on n t to o a ai ir r
Atake replaces the programme on-air withthe sources that are preselected onthe
PSTbus. The take uses the transitiontype and speed that have already been
selected.
DSKs (see chapter4) and anaudio-over (see chapter 6) canbe set to follow the
transition.
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Ma ai in n t tr ra an ns si it ti io on n b bu ut tt to on ns s
The red buttons inthe centre of the bottom row of the lower console are used to
carry out a transition.They are as follows:
DVE
<PRE-ROLL& TAKE>
Used to start a machine (for example, a VTR) and take married video/audio to air
after a pre-configured delay.The pre-roll countdowntimer displays above this
button.
Whenthe switcher is automated by Pro-Belautomation, processing the <PRE-
ROLL& TAKE> buttoncauses the next event to take.