SD-4 Manual
SD-4
In-picture audio meter
Series III
From the range of in-picture audio meters by Chromatec
User instructions
Distributed Worldwide:
M ic hael St even s & Partners Ltd
Invicta Works Elliott Road Bromley Kent BR2 9NT UK
Tel: +44 (0)20 8460 7299 Fax: +44 (0)20 8460 0499
E - m a i l : s a l e s @m i c h a e l - s t e v e n s . c o m
Web:http://www.chromatec.com
SD-4
In-picture audio meter
Model overview
The Model SD-4D is a serial digital in-picture audio meter for displaying up
to four channels of audio in bargraph form. The audio may be derived from
any one of the four embedded audio groups, from two pairs of external
AES/EBU inputs or two pairs of external analogue inputs. The audio bargraphs and on-screen data are mixed in the digital domain with the outgoing SDI signal and may be converted to provide both YUV/RGB and composite video outputs also with superimposed bargraphs. Two AES/EBU outputs together with four corresponding analogue outputs are provided so that
the incoming audio, whether embedded or AES/EBU may be converted to
analogue.
A comprehensive on-screen menu allows the user to configure the SD-4
according to requirements including bargraph height, bar colours, position
on screen, level references, etc. Any one of the four embedded audio
groups or external audio sources may be displayed as audio level bargraphs together with sum & difference (M&S) meters, Loudness* meters
and two phase correlation meters. Six standard meter scales and their corresponding ballistics are available together with VU superimposed on PPM.
Alarms are provided for audio loss, carrier loss, over level, Loudness over
and sustained anti-phase with TTL outputs and on-screen indication in an
alarm condition. There is provision for a wired remote control, duplicating
the operation of the front panel buttons.
*Based on the Thames Television – ITC standard.
Front panel buttons
Insert on
The "Insert On" button switches the bargraphs on or off according to the bar
groups pre-selected from the Menu and at the previously set fade level.
When in the Menu mode the Insert button also acts as a "shift" key when
changing values in the third column.
Function/fade
The Fade buttons determine the mix level of the bargraphs superimposed
on the outgoing video and operate only when the unit is locked (with the red
LED off). When the unit is unlocked and in the Menu mode, these buttons
are used to move the cursor up or down the Menu line in order to select a
function.
Lock
The "Lock" button performs three functions depending in which mode the
unit is operating. When in the locked mode with the red LED off, pressing
the button briefly will reset the peak hold indicators and loudness
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SD-4
In-picture audio meter
alarm/latch. Unlock is activated by keeping the button pressed for about 3
seconds after which the red LED will be lit and the on-screen Menu
appears, disabling the Fade function. While in the Menu mode some
actions require confirmation which is carried out by pressing both Lock and
Insert buttons simultaneously (see below). After carrying out changes within the Menu, pressing the Lock button again will save the settings and
return the SD-4 to the normal meter mode.
Select parameter
When the unit is unlocked the Select Parameter buttons are used to
change the system settings depending on the Menu line selected. In the
normal locked mode the “Select Parameter” buttons may be pressed,
briefly, together with the “Lock” button in order to change the television
standard of the internal black generator.
System Menu
In order to change the numerous parameters of the SD-4 it is necessary to
enter the system Menu by pressing the Lock button for approximately 3
secs, whereupon the red LED above the Lock button will light and the
Menu will appear on-screen. In all cases the “Select Parameter” buttons
select the value shown in the centre column of the menu. Where
applicable, the adjustable values shown in the third column are carried out
by using the “Insert” button as a “shift” key together with the “Select
Parameter” buttons. Those menu lines that have a red flashing cursor
require confirmation of an action which is carried out by pressing both the
"Insert" and "Lock" buttons simultaneously, whereupon the cursor stops
flashing. See following Menu pages.
Note - The order of the following menu lines may vary according to the software release of your SD-4.
Menu Page 1
USER CONFIGURATION SELECT
The SD-4 has two user memories, User 1 and User 2, where all
configuration settings are stored. Depending which user is currently shown
or subsequently selected, exiting the menu will store any changes made in
the menu to that user. In the unlikely event that a system reset is required
then all user settings will be returned to the factory default settings.
USER CONFIGURATION COPY/RESET
It is possible to copy one user configuration to the other user or reset users
to the factory default settings. Each option has a flashing red cursor
indicating that confirmation of this action is required. This is carried out by
pressing the Insert and Lock buttons simultaneously whereupon the red
cursor will stop flashing.
METER DISPLAY HORIZ POSITION
Horizontal adjustment of the whole audio meter display (including phase
meters if displayed) may be adjusted. The menu marker provides an
approximation of it’s relative position on screen.
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In-picture audio meter
METER DISPLAY VERT POSITION
Vertical adjustment of the whole meter display (including phase meters and
timecode reader if displayed) may be adjusted. The menu marker provides
an approximation of it’s relative position on screen.
METER GROUP HEIGHT
The main bargraph group height may be set to Normal (full height), Half or
Quarter depending on the vertical meter resolution required.
METER GROUPS VERT POSITION
Allows vertical adjustment of the bargraph groups. The menu marker
provides an approximation of their relative position on screen.
AUDIO SOURCE SELECT
The SD-4 may be switched to display audio derived from the incoming SDI
video feed (embedded), external AES/EBU or external analogue. In all cases a
maximum of four channels may be displayed at any one time. When viewing
de-embedded audio it is possible to select one of the four groups available.
Menu Page 1/2
METER GROUP [X] DISPLAY
Up to four bargraph groups, A,B,C & D may be displayed, by default A & B
are located to the left of the screen and C & D to the right. Each of these
groups can be assigned to display Level, Sum & Difference, Sum only and
Loudness, or turned off.
METER GROUP [X] CHANNELS ASSIGN
Any combination of channel assignments may be selected.
METER GROUP [X] HORIZ POSITION
Allows horizontal adjustment of the bargraph group. The menu marker
provides an approximation of it’s relative position on screen. When moving
a group and another group is in the way, one group will "push" the other
one along. However, if a group is opened and the position conflicts with a
group already being displayed then both groups will be displayed in outline
mode only until one group is moved clear of the other.
METER GROUP [X] SCALES POSITION
Whichever scale is selected (see Menu p4), it may be placed to the left or
right of the bargraph or turned off.
Menu Page 3
BAR WIDTH
When selecting this line a small red cursor appears on the bargraph at it’s
base according the bargraph selected. The bargraph width value (in pixels)
may then be changed by using the Insert button as a "shift" key together
with the Select Parameter buttons. Selecting "All Bars" applies the value
chosen to all bargraphs.
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SD-4
In-picture audio meter
BAR SPACING
When selecting this line a small red cursor appears between the bargraphs
at their base according the group selected. The bargraph spacing value (in
pixels) may be changed by using the Insert button as a "shift" key together
with the Select Parameter buttons. Selecting "All Groups" applies the value
chosen to all Groups.
BAR COLOUR OVER-RANGE
The "Over-Range" portion of the bargraph is at the top. The required
bargraph is selected and then colours may be changed by using the Insert
button as a "shift" key together with the Select Parameter buttons.
Selecting "All" applies the colour chosen to all bargraphs.
BAR COLOUR UPPER-RANGE
The "Upper-Range" portion of the bargraph is at the centre. The required
bargraph is selected and then colours may be changed by using the Insert
button as a "shift" key together with the Select Parameter buttons.
Selecting "All" applies the colour chosen to all bargraphs.
BAR COLOUR LOWER-RANGE
The "Lower-Range" portion of the bargraph is at the bottom. The required
bargraph is selected and then colours may be changed by using the Insert
button as a "shift" key together with the Select Parameter buttons.
Selecting "All" applies the colour chosen to all bargraphs.
BAR BACKGROUND COLOUR
The required bargraph is selected and then colours may be changed by
using the Insert button as a "shift" key together with the Select Parameter
buttons. Selecting "All" applies the colour chosen to all bargraphs.
METER GROUP BACKGROUND COLOUR
The required background colour may be chosen.
METER GROUP SCALES COLOUR
The required scales colour may be chosen.
METER GROUP LABELS COLOUR
The labels are situated at the base of the bargraph groups. The required
colour may be chosen.
METER SCALES SELECT
By default standard AES/EBU digital scales are displayed. However, these
may be substituted with any of five internationally recognised analogue
scales (together with their respective ballistics). In this case it is necessary
to set the Digital/Analogue Scale Reference as shown below.
ANALOGUE UPPER-RANGE POINT
This value sets the upper colour transition point of the bargraph when
displayed with an analogue scale.
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SD-4
In-picture audio meter
ANALOGUE LOWER-RANGE POINT
This value sets the lower colour transition point of the bargraph when
displayed with an analogue scale.
Menu Page 4
ANALOGUE 0dB REFERENCE
The selected value is the level (in dBu) of the analogue input signal that is
to be displayed at 0dB when using an analogue scale. This value should
also be taken into account when displaying an analogue input signal on the
AES/EBU digital scale as the relationship between the analogue and digital
scale is fixed by the Digital/Analogue Scale Ref (see above)
.
DIGITAL UPPER-RANGE POINT
This value sets the upper colour transition point of the bargraph when
displayed with the AES/EBU digital scale.
DIGITAL LOWER-RANGE POINT
This value sets the lower colour transition point of the bargraph when
displayed with the AES/EBU digital scale.
DIGITAL/ANALOGUE SCALE REF
It is necessary to set this value when displaying a digital input signal on an
analogue scale or an analogue input signal on a digital scale. The
European default value is –18dB whereas in the USA this is usually –20dB.
PHASE BAR OPERATING MODE
In the Independent mode both phase correlation bars appear as horizontal
bargraphs. In the Inc Group mode they are included as a vertical bargraph
included in the main group of the respective audio level meter.
PHASE BAR [X] ASSIGN
Assigns Phase Bar A to the selected channels or bargraph group.
PHASE BAR [X] HORIZ POSITION
Allows horizontal adjustment of the selected phase bar. The menu marker
provides an approximation of it’s relative position on screen.
PHASE BAR [X] VERT POSITION
Allows vertical adjustment of the selected phase bar. The menu marker
provides an approximation of it’s relative position on screen.
PHASE BARS MAX HOLD ENABLE
A maximum hold cursor may be selected to indicate any negative phase
excursion. This may be reset by briefly pressing the Lock button when in
the normal operating mode.
PHASE BAR COLOURS
After selecting Phase In or Phase Out the colours may be selected by
pressing the Insert button as a "shift" key together with the Lock button.
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SD-4
In-picture audio meter
Menu Page 5
SUM LEVEL SET
Depending on operating requirements the sum level may be adjusted.
PEAK HOLD ENABLE
The peak hold indicator is a small coloured line located at the top of each
audio level meter and may be turned off if not required. All signal peaks
are displayed for the time period selected unless updated by a higher peak
in the meantime. If Infinite is selected then the peak levels of a complete
programme may be monitored. Reset is carried out by briefly pressing the
lock button when in the normal operating mode.
PEAK HOLD INDICATOR COLOUR
The required indicator colour may be chosen.
SUPERIMPOSE VU METER
When using a PPM scale (analogue or digital) a VU meter may be
superimposed enabling both peak and average readings simultaneously.
This may be displayed as a split bargraph or a small coloured bar.
SUPERIMPOSED VU COLOUR
The required indicator colour may be chosen for the selected channels.
LOUDNESS DEFAULTS
The loudness defaults are those as originally developed by Thames Television
in conjunction with the ITC and commonly accepted as the "Loudness"
standard. However, some operating requirements may dictate modification of
these default parameters in which case they may be switched off.
LOUDNESS OVER-RANGE POINT
This value sets the single colour transition point of the Loudness bargraph.
LOUDNESS INTEGRATION TIME
This value determines the integration time of the Loudness bargraph.
LOUDNESS ALARM ENABLE
Separate alarms are provided for both Loudness meters. These may be
activated individually, both together or turned off.
LOUDNESS ALARM SET LEVEL
Determines the point on the loudness bargraph at which the alarm is
activated. A red flashing alarm indicator appears at the top of the bargraph
together with small red alarm latch indicators (see below).
LOUDNESS ALARM SET LATCH
The value selected determines how long an alarm condition remains
activated before automatically resetting. When set to Infinite any alarm
condition remains activated until manually reset. There are eight Latch
indicators, each one turning on when another alarm condition has
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SD-4
In-picture audio meter
occurred. If and when all eight indicators are displayed a ninth alarm
condition will result in all eight indicators flashing on/off. The Latch
condition may be reset by briefly pressing the Lock button (when in normal
operating mode).
Menu Page 6
ALARM INDICATORS
The on-screen alarm indicators comprise small coloured squares placed at
the top of the respective bargraph groups. These are colour coded for
each type of alarm condition. They may be hidden if not required.
ALARMS MASTER RESET
All alarms may be reset. The flashing red cursor indicates that confirmation
of this action is required. This is carried out by pressing the Insert and Lock
buttons simultaneously whereupon the red cursor will stop flashing.
ALARMS AUTO RESET
When activated, in an alarm condition the relevant alarms will automatically
be reset after the selected time period subject to no further alarm
conditions occurring in the interim. The timing of each individual alarm is
independent and is taken from the point that the alarm is triggered or retriggered.
ALARM, SDI LOSS ENABLE
When turned on, this alarm will be triggered if the SDI input is lost.
ALARM, CARRIER LOSS ENABLE
When turned on, this alarm will be triggered if both of the AES/EBU inputs
are lost.
SET TIME
Sets the time before the alarm is triggered when the AES/EBU
inputs carrier signals are lost.
ALARM, AUDIO OVER ENABLE
When turned on, this alarm will be triggered if the selected audio channels
exceed the selected level.
SET LEVEL
The range of levels shown will change depending whether the scale
displayed is analogue or digital. The correlation will change
according to the value set in the Digital/Analogue Scale Ref line
of the menu.
ALARM, AUDIO LOSS ENABLE
When turned on, this alarm will be triggered if the selected audio channels
do not reach the selected threshold within the time set below.
SET TIME
Sets the time before the alarm is triggered.
SET THRESHOLD
Sets the threshold level below which the alarm will be triggered.
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SD-4
In-picture audio meter
ALARM, ANTI-PHASE ENABLE
When turned on, this alarm will be triggered if the selected phase bars are
out of phase according to the parameters set below.
SET TIME
Sets the time before the alarm is triggered.
SET THRESHOLD
Sets the threshold in degrees beyond which the alarm will
be triggered.
Menu Page 7
AES/EBU OVERSAMPLES STATUS
This is a status page showing the number of oversamples per channel and
verification that the incoming AES/EBU signal is error free. The sampling
frequency is also displayed. These values may be reset by pressing the
Insert and Lock buttons simultaneously whereupon the red cursor will stop
flashing.
Menu Page 8
VIDEO MODE
The component video output may be set to YUV or RGB. The SDI and
composite outputs are independent of this setting.
VIDEO DISPLAY
In the Auto mode, if the incoming SDI feed is lost the SD-4 will
automatically switch to internally generated black enabling the external
analogue and AES/EBU audio still to be viewed. If the SDI signal is
reinstated the SD-4 will automatically revert to displaying the video from
this feed. When set to Internal, any audio feed (SDI embedded, AES/EBU
or analogue – as selected in Page 1 of the menu) may be viewed on
internal black if in-picture audio metering is not required. In this mode, by
default, the fade level of the bargraphs is set to maximum but they may
subsequently be faded down if required.
VIDEO STANDARD INTERNAL
If the SD-4 is used as a dedicated audio meter in Internal mode only it will
be necessary to set the outputs to 525 line NTSC or 625 line PAL.
Although the incoming SDI video standard is detected automatically it is
still necessary to set the internal black generator manually so that if the
incoming video is lost (and Auto mode is selected) then the SD-4 will
output the required television standard.
NOTE! It is also possible to change the internal black generator’s standard
by briefly pressing the Lock and both Select Parameter buttons
simultaneously when the unit is in the normal operating mode.
NTSC PEDESTAL
The NTSC pedestal of the outgoing video may be set on or off.
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In-picture audio meter
VIDEO FUNCTIONS
Various video test functions may be selected. After use, press the Lock
button for a few moments to return to the system menu and then to turn off
the test functions.
DATA PORT 1 ASSIGN
Assign the data port to the required external device.
TIMECODE READER ENABLE
NOTE! This is a system option. If fitted, either LTC or VITC may be
selected. LTC is derived externally (see connectors). If present on the
internal video, VITC may be displayed.
TIMECODE HORIZONTAL POSITION
Allows horizontal adjustment of the timecode reader. The menu marker
provides an approximation of it’s relative position on screen.
TIMECODE VERTICAL POSITION
Allows vertical adjustment of the timecode reader. The menu marker
provides an approximation of it’s relative position on screen.
TIMECODE BACKGROUND COLOUR
The required background colour may be chosen.
TIMECODE NUMBERS COLOUR
The required numbers colour may be chosen.
Master Reset
Master Reset is achieved by turning off the power for a few seconds, and
turning it back on again while pressing both Fade/Function buttons until the
bargraphs appear. A Master Reset is employed to return all settings to the
factory default, or it may be carried out in the unlikely event that the unit
fails to respond to the front panel push buttons. Please note that all user
settings will be lost.
Connections
SDI
The SD-4 is normally connected in-line with an SDI monitor feed via the
appropriate 75ohm BNC connectors and is designed to accept 525 or 625
line SMPTE 259M serial digital video. A loop-through copy output is also
provided.
Analogue video
Both YUV component and composite outputs are on 75ohm BNC
connectors. These are an analogue copy of the SDI input plus
superimposed audio bargraphs.
Audio
Two pairs of AES/EBU and two pairs of analogue inputs are provided to
accompany the SDI when separate audio and video feeds are employed.
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SD-4
In-picture audio meter
Two pairs of AES/EBU outputs are available which may comprise the
corresponding AES/EBU inputs or de-embedded audio from any of the four
available groups contained in the SDI feed. Four analogue outputs are also
provided.
Power
The SD-4 will operate from a nominal 115VAC or 230VAC mains supply.
The mains input voltage is selected by the switch located on the rear panel
next to the power inlet.
Rear panel layout
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SD-4
In-picture audio meter
Connection details
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SD-4
In-picture audio meter
SD-4 Specifications
(subject to change without notice)
Inputs:
1 x SMPTE 259M Serial digital 525/625 75ohm BNC.
2 x Pairs AES/EBU digital audio, 110ohm balanced
2 x Pairs analogue audio, balanced, 30kohm impedance
Outputs:
1 x SMPTE 259M Serial 525/625 75ohm BNC
1 x SMPTE 259M Serial 525/625 75ohm BNC copy output
1 x YUV Component video, 1Vp-p, PAL/NTSC 75ohm BNC
Or/ RGB Component video (sync on green), 1Vp-p, PAL/NTSC 75ohm BNC
1 x Composite video, 1Vp-p, PAL/NTSC 75ohm BNC
2 x Pairs AES/EBU digital audio, 110ohm balanced
2 x Pairs analogue audio, balanced maximum output level +20dB ±0.5dB
Embedded audio extraction:
Sampling rate: 32-48kHz variable, automatically detected
Digital audio processing resolution: 16 bits
Audio channels extracted: Any one of four groups (four channels)
Scales & ballistics:
AES/EBU: Overall dynamic range: 60dB (0dBu to -60dBu)
Attack time: 1 sample
Decay time: 1.5secs per 20dB
DIN PPM: Overall dynamic range: 55dB (+5dB to -50dB)
Attack time: 10ms
Decay time: 1.5secs per 20dB
BBC PPM: Overall dynamic range: 28dB (+12dB to -16dB)
Attack time: 10ms
Decay time: 2.8secs per 24dB
Nordic PPM Overall dynamic range: 60dB (+12dB to -48dB)
Attack time: 10ms
Decay time: 1.7secs per 20dB
VU:
Overall dynamic range: 23dB (+3dB to -20dB)
Attack time: 300ms
Decay time: 300ms per 20dB
VU EXTD: Overall dynamic range: 80dB (+10dB to -70dB)
Attack time: 300ms
Decay time: 300ms per 20dB
Loudness: Perceived loudness scale: L-12 to L+12
(Default
Line-up point: L+4 which corresponds to 0dB (BBC PPM 4)
settings)
on steady tone at 1kHz (only)
Integration time: 4 secs
(Based on the Thames Television/ ITC Standard)
Phase correlation:
Attack time: 1sec for 0 to ±1 deviation
Decay time: 1sec for ±1 to 0 deviation
Input dynamic range: 45dB
Minimum input level: -50dB
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