Broadcast MiniBlox 4463A User manual

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EU declaration of conformity
We certify that this apparatus conforms to the requirements of the EMC and Low
Voltage Directives. Emissions EN55103-1, susceptibility EN55103-2 and safety
EN60950-1 2002.
27 April 2005
Warranty
DTL Broadcast Ltd warrants this unit against defects in materials and
workmanship for a period of one year from the date of shipment. At its option,
the company will repair or replace products that prove to be defective during the
warranty period, provided they are returned to the company with advance
notification and with freight prepaid. Repairs may only be conducted by an
authorised representative of the company. As a result any unauthorised repair or
attempted repair will automatically void the warranty.
When a distributor supplies the company's products, that distributor should be
approached initially if there are any warranty problems.
The company makes no other warranties, express or implied, as to the
merchantability, fitness for a particular purpose, or otherwise. The company’s
liability for any cause, including breach of contract, breach of warranty, or
negligence, with respect to products sold by it, is limited to repair or replacement
by the company, at its sole discretion. This remedy is exclusive. In no event shall
the company be liable for any incidental or consequential damages, including
loss of profits.
DTL Broadcast Ltd, Johnson’s Estate, Silverdale Road, Hayes, Middlesex, UB3 3BA, UK
Phone: [phone] Fax: [phone]
Internet: www.dtl-broadcast.com [email protected]
\\Dtlserver\company\PRODUCTS\MiniBlox\User Manuals\4463A Iss2.doc
MiniBlox™
4463A Composite video & analogue audio to SDI with
embedded audio ADC
Converts analogue composite video to SDI and inserts two
balanced analogue audio stereo pairs into any group within the
270Mb/s 525/625 SDI signal
User Manual
Latest information available at:
www.miniblox.com
Broadcast

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Specification
Analogue video input
Standards NTSC(J, M), PAL(B, D, G, H, I, M, N, Nc, 60) and
SECAM (B, D, G, K, K1, L) CVBS
Connector 75ΩBNC
Signal Level 1V p-p nominal
Return loss >40dB to 5.5MHz
Video conversion
Differential gain <1.5%
Differential phase <0.5o
Quantisation 10-bit
SDI output
Standards SMPTE 259M 270Mb/s 525/625 SDI
Connector 75ΩBNC
Signal level 800mVp-p ±10%
Jitter <0.15UI with colour bars input
Return loss >18dB to 270MHz
Analogue audio input
Standard Balanced analogue
Number 2 stereo pairs
Quantisation 24 bit
Connector Removable screw terminal
Impedance 20KΩ
Level Max 0dBFS=+26dBu/ Min 0dBFS=+12dBu
Audio embedding
Standard SMPTE 272M
Resolution 20 or 24 bit
Power
Voltage 6-12V DC
Current 450mA at 6V
Power connector Locking 2.5mm jack connector (centre +ve)
Other
LEDs Show power, signal presence & embedding status
Temperature range 0˚C to 40˚C
Dimensions 63.5mm x 84mm x 30mm (excluding connectors)
Weight 325g
We reserve the right to change technical specifications without prior notice.
E&OE.

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If switch 6 is left on for more than six seconds the unit will enter custom level
select mode – all group LEDs will flash red while the unit is in this mode. See
below for details.
Custom level select mode
To meet all international analogue audio full scale input levels the 4463A has a
custom analogue input level select mode. In this mode it is possible to select any
input level between 12dBu and 26dBu in 0.5dBu increments. The default value
of the custom level on delivery is 20dBu. Once the value of the custom level is
altered it will remain stored in memory until changed again.
To set the analogue input level:-
•Activate switch 6, once this has been on for more than six seconds
the unit will enter custom level select mode. This can be verified by
all four group LEDs on the front of the box flashing red.
•Switch 1-5 will now set the expected analogue input level as per the
table below.
•To exit the custom level select mode deactivate switch 6, the value
on switches 1-5 will be stored in memory. It will be necessary to
reset switches 1-5 to the desired settings for normal use.
Switch 1
Switch2 Switch3
Switch 4 Switch 5
Level
0 0 0 0 0 12dBu
0 0 0 0 1 12.5dBu
0 0 0 1 0 13dBu
0 0 0 1 1 13.5dBu
0 0 1 0 0 14dBu
0 0 1 0 1 14.5dBu
↓↓↓↓↓↓
↓↓↓↓↓↓
1 1 0 1 0 25.5dBu
1 1 0 1 1 26dBu
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DTL MiniBlox™ - solutions in a box
General description
The 4463A is a broadcast quality unit that converts analogue composite video to
SDI then embeds two balanced stereo audio pairs into the ancillary data space of
the 270Mbps SDI signal.
The broadcast quality composite video to SDI conversion uses two 11 bit ADCs
with x4 oversampling and with five line adaptive comb filtering. A jitter filter
and digital time base corrector compensate for unstable input signals. Input
quality is automatically detected between VCR / CCTV and broadcast sources.
Audio is converted using a high quality 24 bit audio ADC and can be embedded
as 20 or 24 bit audio. Embedding conforms to SMPTE 272M and allows audio to
be inserted into any of the four groups.
It is housed in an extremely compact and rugged aluminium case ideally suited
to both studio and portable applications.
Main Features
•
•
•Converts analogue composite video to SDI and inserts two balanced
analogue audio stereo pairs into any group
•Auto select multi-standard input of PAL, NTSC & SECAM
•Two 11 bit 4x oversampled video ADCs with 5 line adaptive comb
filtering
•Automatic video gain control range from -3dB to 6dB
•Jitter filter and digital TBC for unstable input signals
•High quality 24 bit audio ADC
•Selectable 20 or 24 bit embedding
•Adjustable full scale input levels to meet all international standards
•LEDs show group status and input signal presence
•Extremely compact and rugged

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Functional block diagram
Installation and operation
The 4463A is simple to use and install.
•Set the dipswitches by referring to the table and description below
or the table on the rear of the unit.
•Connect video & audio inputs and SDI output.
•Apply power to the 4463A unit either via the locking power
connector from the external power supply or 1U rack frame, or by
sliding into the 2U rack mounting frame with central power
supplies.
•On power-up the 4463A will perform a short (3 second) self test.
The group LEDs will flash while this is in progress.
•The signal LED will be green when there is power and a valid SDI
output signal.
•One of the group LEDs will light corresponding to the group
selected by the switches. This LED will be green if the unit is
successfully embedding audio. The LED will be red otherwise.
•The switch settings can be altered whilst the unit is powered and the
changes are implemented immediately with the exception of
disabling the AGC.
•The 4-800MB mounting bracket can be used to install a MiniBlox
unit. The bracket should first be fixed vertically to any surface. The
MiniBlox can then be lowered onto the dovetail part of the bracket
with the front endplate uppermost to retain it.
Analogue Audio
Inputs
SDI
Output
CVBS
Input
AGC &
Clamping Dual 11-bit
Video ADC TBC & De-jitter Embedded Audio MUX Serialiser & Cable Driver
24bit Audio
ADC
Micro-controllerControl Switches LEDs
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Switch settings
Switch OFF ON
1 Toggle group
2 Disable AGC
3 Disable de-jitter
4 24-bit 20-bit
5 Pedestal present
6 Toggle level (LED flashes red 1=18dB, 2=24dB & 3=custom)
Switch 1 sets the group into which audio packets are inserted. Moving the switch
to the on position then immediately to the off position selects the next available
group. The selected group is indicated by the LED on the end of the unit.
Switch 2 disables the automatic gain control. The AGC is capable of scaling an
input signal voltage of 0.5Vp-p to 2Vp-p to the nominal 1Vp-p level. This is useful
for restoring signals which have been subject to cable attenuation, or pre-
amplification. Disabling the AGC when the unit is in use has the effect of
freezing the gain to a constant value (worked out from the input signal at the
time). To completely remove the AGC, ensure that it is disabled before powering
the unit.
Switch 3 disables the jitter filter. The jitter filter can be disabled for locking to
extremely low quality or unstable analogue inputs.
Switch 4 controls the bit depth of the embedded audio. When the switch is off,
extended audio packets are multiplexed into the video signal (24 bit audio).
When the switch is on, extended audio packets are not included (20 bit audio).
Switch 5 defines if there is a 7.5 IRE pedestal on the input analogue video
source. When this switch is in the off position the unit does not expect a
pedestal, when in the on position the unit expects a 7.5 IRE pedestal to be
present on the input analogue video source.
Switch 6 controls the analogue level of the input; three levels are available
18dBu, 24dBu and a custom setting (default on delivery 20dBu). These levels
are toggled through by activating and immediately deactivating the switch. The
group LEDs will flash for two second as per the table below indicating the
operating analogue audio input level.
Level LEDs
18dB Group 1 flash red with group 2,3&4 green
24dB Group 2 flash red with group 1,3&4 green
Custom Group 3 flash red with group 1,2&4 green