E NSEMBLE
DESIGNS
Model 7925
Dual HD
Downconverter
Data Pack
Revision 1.1 SW v2.2.2
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Model 7925 Dual HD Downconverter
Contents
MODULE OVERVIEW 3
Audio Handling 3
Control 3
Metadata 3
Automatic Aspect Ratio Conversion 3
APPLICATIONS 6
HD Downconversion 6
INSTALLATION 6
SD SDI or Composite Out BNC Conguration 6
CABLING 6
Module Conguration and Control 8
Front Panel Controls and Indicators 9
Avenue PC Remote Conguration 10
7925 Avenue PC Menus 10
Avenue Touch Screen Remote Conguration 20
7925 Avenue Touch Screen Menus 20
TROUBLESHOOTING 30
SOFTWARE UPDATING 30
WARRANTY AND FACTORY SERVICE 31
Warranty 31
Factory Service 31
SPECIFICATIONS 32
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Model 7925 Dual HD Downconverter
MODULE OVERVIEW
The 7925 module is a two-channel, dual downconverter with HD and SD outputs that can
be used in the most demanding broadcast applications. With two downconverters on one
module, the 7925 provides high eciency with excellent picture quality. The downconverted
outputs are timeable with respect to the reference input and can feed production switchers
and routers.
The 7925 accepts 720p, 1080i, 1080sF and 1080p inputs that are synchronous or
asynchronous. If an SD SDI input is received, SD is passed to the output.
Motion-adaptive deinterlacing of the video signal enables all internal processing to occur in
progressive.
The 7925 performs automatic color space and gamma conversion to accommodate the
dierences between HD and SD. The Aspect Ratio Conversion process oers resizing and
repositioning with choices for: Letterbox, Anamorphic, Crop and Zoom.
Proc amp controls are provided in the form of Video, Chroma and Pedestal. Video outputs can
be timed with respect to the reference input.
Audio Handling
The 7925 supports 16 channels of embedded audio (without the need for any sub module).
Embedded audio in the input is safely bypassed around the video processing, delayed to
preserve lip sync, and reembedded in the SD SDI output. Any two of those audio channels
can be selected for conversion to analog form. These balanced outputs can be used with
the composite video output to feed analog equipment, or for signal monitoring. All audio
processing and conversion is performed at full 24 bit resolution.
Control
The 7925 can be congured locally or controlled and congured remotely with Avenue Touch
Screens, Express Panels, or Avenue PC Software. Alarm generation, congurable user levels,
module lock-out, and customizable menus are just some of the tools included in the Avenue
control system.
Metadata
HD closed captioning is carried in data packets in the vertical interval ancillary data space. The
7925 properly translates HD caption data to traditional SD captioning (line 21 or 23) so that
closed captioning content is converted transparently between video standards and formats.
Automatic Aspect Ratio Conversion
The 7925 uses WSS (Wide Screen Signaling) and AFD (Active Format Description) to mark or
identify the aspect ratio of the video content. These tags are read at the input of the module
to determine the type of Aspect Ratio Conversion to perform. Subsequently, these tags are
properly updated in the output signal to reect its format and presentation.
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Model 7925 Dual HD Downconverter
Frame
Master
Reference
Ancilliary Processing
Embedded Audio
Closed Captioning
AFD/WSS
+
SDI
Reclock
Audio
Disembedder
Channel
Select
Audio
DAC
Deserializer
16
Channels
Analog
Composite
Encoder
HD/SD SDI
Input
Loopback
HD/SD SDI
Outputs
Downconverted
SD Outputs
SDI
or
Analog
Composite
Selectable
by Output
2 Channels
Balanced Analog
Audio Output
Channel A
HD to SD Downconversion
Frame Sync
Downconverter A
Serializer
Ancilliary Processing
Embedded Audio
Closed Captioning
AFD/WSS
+
SDI
Reclock
Deserializer
Analog
Composite
Encoder
HD/SD SDI
• Sca ling
• Asp ect Rati o Conve rsion
• Mas king
• Cro pping
• Col or Space Conver sion
Input
Downconverted
SD Outputs
SDI
or
Analog
Composite
Selectable
by Output
HD to SD Downconversion
Frame Sync
Downconverter B
Serializer
Adjustable
Genlock
Timing
Audio
Disembedder
Channel
Select
Audio
DAC
16
Channels
2 Channels
Balanced Analog
Audio Output
Channel B
• Sca ling
• Asp ect Rati o Conve rsion
• Mas king
• Cro pping
• Col or Space Conver sion
Loopback
HD/SD SDI
Outputs
7925 Dual HD Downconverter Functional Block Diagram, Portrait Orientation
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Frame
Master
Reference
Ancilliary Processing
Embedded Audio
Closed Captioning
AFD/WSS
+
SDI
Reclock
Audio
Disembedder
Channel
Select
Audio
DAC
Deserializer
16
Channels
Analog
Composite
Encoder
HD/SD SDI
Input
Loopback
HD/SD SDI
Outputs
Downconverted
SD Outputs
SDI
or
Analog
Composite
Selectable
by Output
2 Channels
Balanced Analog
Audio Output
Channel A
HD to SD Downconversion
Frame Sync
Downconverter A
Serializer
Ancilliary Processing
Embedded Audio
Closed Captioning
AFD/WSS
+
SDI
Reclock
Deserializer
Analog
Composite
Encoder
HD/SD SDI
• Scaling
• Aspect Ratio Conversion
• Masking
• Cropp ing
• Color Space Conversion
Input
Downconverted
SD Outputs
SDI
or
Analog
Composite
Selectable
by Output
HD to SD Downconversion
Frame Sync
Downconverter B
Serializer
Adjustable
Genlock
Timing
Audio
Disembedder
Channel
Select
Audio
DAC
16
Channels
2 Channels
Balanced Analog
Audio Output
Channel B
• Scaling
• Aspect Ratio Conversion
• Masking
• Cropp ing
• Color Space Conversion
Loopback
HD/SD SDI
Outputs
Model 7925 Dual HD Downconverter
7925 Dual HD Downconverter Functional Block Diagram, Landscape Orientation
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Model 7925 Dual HD Downconverter
HD SDI
SD SDI to router
7925
Two Channel
Down Converter
Composite
Analog audio
Monitor
SD SDI to switcher
Composite
Analog audio
Monitor
HD Camera 1
HD SDI
HD Camera 2
APPLICATIONS
HD Downconversion
In this example the 7925 is down converting HD signals from two cameras. The 7925 here is
congured to output an SD SDI signal and an analog composite signal for each camera. The
outputs can be timed to house with respect to the reference. Two channels of analog audio
can be monitored as well.
INSTALLATION
Plug the 7925 module into any one of the slots in the 1RU or 3RU frame and install the plastic
overlay provided onto the corresponding group of rear BNC connectors associated with the
module location.
Note that the plastic overlay has an optional adhesive backing for securing it to the frame.
Use of the adhesive backing is only necessary if you would like the location to be permanent
and is not recommended if you need to change module locations. This module may be hotswapped (inserted or removed) without powering down or disturbing performance of the
other modules in the system.
SD SDI or Composite Out BNC Conguration
The four SD Out BNCs (SD Out 1A, 1B, 2A and 2B) can be congured as either SD or composite
outputs by setting switches on the 7925 module. Set each switch independently to the up
position for SD SDI and down for composite (CPST).
CABLING
Refer to the 3RU and 1RU backplane diagrams of the module below for cabling instructions.
Note that unless stated otherwise, the 1RU cabling explanations are identical to those given in
the 3RU diagram.
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Model 7925 Dual HD Downconverter
7925 DDC
SD Out 2B
SD Out 1B
HD Out 2B
HD Out 2A
SD Out 2A
HD Out 1B
HD Out 1A
HD In B
HD In A
Analog Audio
SD Out 1A
Connect the HD serial
digital signal to be
downconverted by
Downconverter A to the
HD In A
BNC
Connect the HD serial
digital signal to be
downconverted by
Downconverter B to the
HD In B BNC
Connect HD output
destinations to the
downconverted signal at
BNCs HD Out 1A and
HD Out 2A
Connect SD output
destinations to the
downconverted signal at
BNCs SD Out 1A and
SD Out 2A
Connect SD output
destinations to the
downconverted signal at
BNCs SD Out 1B and
SD Out 2B
Connect HD output
destinations to the
downconverted signal at
BNCs HD Out 1B and
HD Out 2B
Analog Audio – Use the
Analog Audio 15-pin
connector for cabling
analog audio outputs. Refer
to the pinout diagram and
table below.
1
6
+
+
+
+
---
-
11
AUD 2A AUD 1A
AUD 1B
AUD 2B
Analog Audio Pinouts
Signal Pins
Output
Aud 1 +, -, G
Aud 2 +, -, G
Aud 3 +, -, G
Aud 4 +, -, G
1, 2, 7
5, 4, 8
11, 12, 9
15, 14, 10
Output 1A
Output 2A
Output 1B
Output 2B
3RU Backplane
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Model 7925 Dual HD Downconverter
7925 DDC
HD Out 1AHD Out 2ASDI Out 1ASDI Out 2A HD In A
HD Out 1BHD Out 2B
HD In B
Analog Audio
SDI Out 1B
SDI Out 2B
1RU Backplane
Module Conguration and Control
The conguration parameters for each Avenue module must be selected after installation.
This can be done remotely using one of the Avenue remote control options or locally using
the module front panel controls. Each module has a Remote/Local switch on the front edge
of the circuit board which must rst be set to the desired control mode. The conguration
parameter choices for the module will dier between Remote and Local modes. In Remote
mode, the choices are made through software and allow more selections.
If you are not using a remote control option, the module parameters must be congured from
the front panel switches. Parameters that have no front panel control will be set to a default
value. The Local switches are illustrated in the Front Panel Controls and Indicators section. The
Local switches are inactive when the Remote/Local switch is in the Remote position.
In the Remote mode, Avenue module parameters can be congured and controlled from one
of the remote control options, the Avenue Touch Screen, Avenue Express Control Panel, or the
Avenue PC Application. Once the module parameters have been set remotely, the information
is stored on the module CPU. This allows the module to be moved to a dierent slot in the
frame at your discretion without losing the stored information.
For setting the parameters remotely using the Avenue PC option, refer to the Avenue PC
Remote Conguration section of this document.
For setting the parameters remotely using the Avenue Touch Screen option, refer to the
Avenue Touch Screen Remote Conguration section of this document following Avenue PC.
Express Panel operation is described in the data pack that accompanies the control panel
option.
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Model 7925 Dual HD Downconverter
7925
Dual
Down
Converter
Vid A In
AB
Ref In
Vid B In
Remote
Local
Run
Pwr
Ana/Proc
Box/Crop
Ana/Proc
Box/Crop
Pwr green LED:
Indicates the presence (ON) or
absence (OFF) of power (+5V).
Run green LED:
OFF: A power fault or halted CPU
ON: A halted CPU
FAST BLINK: CPU Run error
SLOW BLINK: System OK. (If
SPI control is active from the
main frame System Control
Module, all Run indicators will be
synchronized.)
Ref In green LED:
ON indicates external reference
signal is present and valid.
OFF indicates no external
reference is detected or is invalid.
Remote/Local switch:
Set to the mode you will be using.
Vid A In green LED:
ON indicates SDI input signal is
present and valid.
OFF indicates no input signal is
detected or is invalid.
Vid B In green LED:
ON indicates SDI input signal is
present and valid.
OFF indicates no input signal is
detected or is invalid.
Ana/Proc switch:
Set the output mode to Ana
(Anamorphic) or Proc (Process).
When the switch is set to Proc
then the Box/Crop switch is
enabled and the output will either
be Box or Crop for A channel.
Box/Crop switch:
When Proc is selected above, set
the output to either Box or Crop
for A channel.
Ana/Proc switch:
Set the output mode to Ana
(Anamorphic) or Proc (Process).
When the switch is set to Proc
then the Box/Crop switch is
enabled and the output will either
be Box or Crop for B channel.
Box/Crop switch:
When Proc is selected above, set
the output to either Box or Crop
for B channel.
Front Panel Controls and Indicators
The front edge indicators and switch settings are shown in the diagram below:
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Model 7925 Dual HD Downconverter
Avenue PC Remote Conguration
The Avenue PC remote control menus for this module are illustrated and explained below.
The Conguration Summary gives tips and general background information on setting
the parameters. For more information on using Avenue PC, refer to the Avenue PC Control
Application Software data pack.
Parameter elds that are grayed out can indicate one of the following conditions:
An option is not installed. •
The function is not active.•
The module is locked.•
The User Level set with Avenue PC is not accessible from the current User Level.•
7925 Avenue PC Menus
The Input A menu shown below allows you to congure the following:
Input• – Reports the HD input format detected by the module.
Reference• – Reports the status of the reference input as either Ref Video In Lock or No
Reference.
Ref Source• – Use this control to set the reference input source. Select between Master
Ref or Video In Ref.
Embedded Aud• – Reports which of the four groups are present in the embedded
audio on the video input.
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Model 7925 Dual HD Downconverter
The Cong A menu shown below allows you to congure the following:
Mode• – Use this control to set the aspect ratio for the downconverted SD video
output. Choose between Anamorphic, Letterbox 16:9, Letterbox 14:9, Letterbox 13:9,
or Center Cut.
Detail• – Adjust the amount of picture detail enhancement on the output from Low,
Medium, or High.
Cpst Out Setup• – Turn setup on the output on or o.
Test Pattern• – Select a test pattern to be sent to the video output of the module.
Choose Bars, Black or O.
Captions Out• – Use this control to determine if closed captions are passed through to
the output. Choose On or O.
Output Embed• – Use this control to determine if audio in embedded into the video
output stream. Choose On or O.
Anlg Audio Out• – Use this control to select which channel pair to be routed to the
analog output on the module’s D connector.
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Model 7925 Dual HD Downconverter
The Prc Amp A menu shown below allows you to adjust the following video processing
parameters for the signal:
Gain• – Adjust the percentage of overall gain (luminance and chrominance).
Chroma• – Adjust the percentage of chroma amplitude.
Pedestal• – Adjust the pedestal (black) level of the signal in IRE.
Hue• – Adjust the hue of the signal ±180 degrees.
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Model 7925 Dual HD Downconverter
Use the Timing A menu shown below to adjust the following parameters:
Fine Phase• – Adjust for proper ScH phase with respect to other sources. If ne phase
will not adjust properly, readjust the horizontal phase by up to ±2 clocks until the ne
phase falls into place.
Hor Timing• – Adjust the horizontal timing of the output signal to place the leading
edge of sync coincident with other sources.
Vertical Timing• – Set the vertical timing to a typical setting of 0 lines.
Delay• – The amount of total delay through the module is reported in lines.
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Model 7925 Dual HD Downconverter
The Input B menu shown below allows you to congure the following:
Input• – Reports the HD input format detected by the module.
Reference• – Reports the status of the reference input as either Ref Video In Lock or No
Reference.
Ref Source• – Use this control to set the reference input source. Select between Master
Ref or Video In Ref.
Embedded Aud• – Reports which of the four groups are present in the embedded
audio on the video input.
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Model 7925 Dual HD Downconverter
The Cong B menu shown below allows you to congure the following:
Mode• – Use this control to set the aspect ratio for the downconverted SD video
output. Choose between Anamorphic, Letterbox 16:9, Letterbox 14:9, Letterbox 13:9,
or Center Cut.
Detail• – Adjust the amount of picture detail enhancement on the output from Low,
Medium, or High.
Cpst Setup• – Turn setup on the output on or o.
Test Pattern• – Select a test pattern to be sent to the video output of the module.
Choose Bars, Black or O.
Captions Out• – Use this control to determine if closed captions are passed through to
the output. Choose On or O.
Output Embed• – Use this control to determine if audio in embedded into the video
output stream. Choose On or O.
Anlg Audio Out• – Use this control to select which channel pair to be routed to the
analog output on the module’s D connector.
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Model 7925 Dual HD Downconverter
The Prc Amp B menu shown below allows you to adjust the following video processing
parameters for the signal:
Gain• – Adjust the percentage of overall gain (luminance and chrominance).
Chroma• – Adjust the percentage of chroma amplitude.
Pedestal• – Adjust the pedestal (black) level of the signal in IRE.
Hue• – Adjust the hue of the signal ± 180 degrees.
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Model 7925 Dual HD Downconverter
Use the Timing B menu shown below to adjust the following parameters:
Fine Phase• – Adjust for proper ScH phase with respect to other sources. If ne phase
will not adjust properly, readjust the horizontal phase by up to ±2 clocks until the ne
phase falls into place.
Hor Timing• – Adjust the horizontal timing of the output signal to place the leading
edge of sync coincident with other sources.
Vertical Timing• – Set the vertical timing to a typical setting of 0 lines.
Delay• – The amount of total delay through the module is reported in lines.
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Model 7925 Dual HD Downconverter
Use the Global menu shown below to adjust the following parameters:
Audio Dig Ref• – Set the digital reference level for the audio output. Select between
-20 or -18 dBFS.
Audio Anlg Ref• – Set the analog audio reference level for the audio output. Select
between +4, 0, -4, -6, or -10 dB.
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Model 7925 Dual HD Downconverter
The Memory menu shown below allows you to save overall module setups to ve memory
registers as follows:
Select • Save, then one of the ve memory registers Reg 1 – 5. The box will turn green.
The entire module setup is now saved in the selected register.
To recall a register, select the • register box. If there is information saved, the box will
turn green. The saved setup will now be loaded to the module. Up to ve dierent
module setups can be saved and recalled using the individual registers.
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Model 7925 Dual HD Downconverter
Avenue Touch Screen Remote Conguration
The Avenue Touch Screen remote control menus for this module are illustrated and explained
below. The Conguration Summary gives tips and general background information on setting
the parameters. For more information on using Avenue PC, refer to the Avenue PC Control
Application Software data pack.
Parameter elds that are grayed out can indicate one of the following conditions:
An option is not installed. •
The function is not active.•
The module is locked.•
The User Level set with Avenue PC is not accessible from the current User Level.•
7925 Avenue Touch Screen Menus
The Input A menu shown below allows you to congure the following:
Input• – Reports the HD input format detected by the module.
Reference• – Reports the status of the reference input as either Ref Video In Lock or No
Reference.
Ref Source• – Use this control to set the reference input source. Select between Master
Ref or Video In Ref.
Embedded Aud• – Reports which of the four groups are present in the embedded
audio on the video input.
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Model 7925 Dual HD Downconverter
The Cong A menu shown below allows you to congure the following:
Mode• – Use this control to set the aspect ratio for the downconverted SD video
output. Choose between Anamorphic, Letterbox 16:9, Letterbox 14:9, Letterbox 13:9,
or Center Cut.
Detail• – Adjust the amount of picture detail enhancement on the output from Low,
Medium, or High.
Cpst Out Setup• – Turn setup on the output on or o.
Test Pattern• – Select a test pattern to be sent to the video output of the module.
Choose Bars, Black or O.
Captions Out• – Use this control to determine if closed captions are passed through to
the output. Choose On or O.
Output Embed• – Use this control to determine if audio in embedded into the video
output stream. Choose On or O.
Anlg Audio Out• – Use this control to select which channel pair to be routed to the
analog output on the module’s D connector.
www.ensembledesigns.com 7925-21
Model 7925 Dual HD Downconverter
The Prc Amp A menu shown below allows you to adjust the following video processing
parameters for the signal:
Gain• – Adjust the percentage of overall gain (luminance and chrominance).
Chroma• – Adjust the percentage of chroma amplitude.
Pedestal• – Adjust the pedestal (black) level of the signal in IRE.
Hue• – Adjust the hue of the signal ± 180 degrees.
www.ensembledesigns.com 7925-22
Model 7925 Dual HD Downconverter
Use the Timing A menu shown below to adjust the following parameters:
Fine Phase• – Adjust for proper ScH phase with respect to other sources. If ne phase
will not adjust properly, readjust the horizontal phase by up to ±2 clocks until the ne
phase falls into place.
Hor Timing• – Adjust the horizontal timing of the output signal to place the leading
edge of sync coincident with other sources.
Vertical Timing• – Set the vertical timing to a typical setting of 0 lines.
• Delay – The amount of total delay through the module is reported in lines.
www.ensembledesigns.com 7925-23
Model 7925 Dual HD Downconverter
The Input B menu shown below allows you to congure the following:
Input• – Reports the HD input format detected by the module.
Reference• – Reports the status of the reference input as either Ref Video In Lock or No
Reference.
Ref Source• – Use this control to set the reference input source. Select between Master
Ref or Video In Ref.
Embedded Aud• – Reports which of the four groups are present in the embedded
audio on the video input.
www.ensembledesigns.com 7925-24
Model 7925 Dual HD Downconverter
The Cong B menu shown below allows you to congure the following:
Mode• – Use this control to set the aspect ratio for the downconverted SD video
output. Choose between Anamorphic, Letterbox 16:9, Letterbox 14:9, Letterbox 13:9,
or Center Cut.
Detail• – Adjust the amount of picture detail enhancement on the output from Low,
Medium, or High.
Cpst Setup• – Turn setup on the output on or o.
Test Pattern• – Select a test pattern to be sent to the video output of the module.
Choose Bars, Black or O.
Captions Out• – Use this control to determine if closed captions are passed through to
the output. Choose On or O.
Output Embed• – Use this control to determine if audio is embedded into the video
output stream. Choose On or O.
Anlg Audio Out• – Use this control to select which channel pair to be routed to the
analog output on the module’s D connector.
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Model 7925 Dual HD Downconverter
The Prc Amp B menu shown below allows you to adjust the following video processing
parameters for the signal:
Gain• – Adjust the percentage of overall gain (luminance and chrominance).
Chroma• – Adjust the percentage of chroma amplitude.
Pedestal• – Adjust the pedestal (black) level of the signal in IRE.
Hue• – Adjust the hue of the signal ±180 degrees.
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Model 7925 Dual HD Downconverter
Use the Timing B menu shown below to adjust the following parameters:
Fine Phase• – Adjust for proper ScH phase with respect to other sources. If ne phase
will not adjust properly, readjust the horizontal phase by up to ±2 clocks until the ne
phase falls into place.
Hor Timing• – Adjust the horizontal timing of the output signal to place the leading
edge of sync coincident with other sources.
Vertical Timing• – Set the vertical timing to a typical setting of 0 lines.
Delay• – The amount of total delay through the module is reported in lines.
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Model 7925 Dual HD Downconverter
Use the Global menu shown below to adjust the following parameters:
Audio Dig Ref• – Set the digital reference level for the audio output. Select between
-20 or -18 dBFS.
• Audio Anlg Ref – Set the analog audio reference level for the audio output. Select
between +4, 0, -4, -6, or -10 dB.
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Model 7925 Dual HD Downconverter
The Memory menu shown below allows you to save overall module setups to ve memory
registers as follows:
Select • Save, then one of the ve memory registers Reg 1 – 5. The box will turn green.
The entire module setup is now saved in the selected register.
To recall a register, select the • register box. If there is information saved, the box will
turn green. The saved setup will now be loaded to the module. Up to ve dierent
module setups can be saved and recalled using the individual registers.
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Model 7925 Dual HD Downconverter
TROUBLESHOOTING
As a troubleshooting aid, the signal presence, power and CPU status can be easily monitored
from the front panel of this module using the indicators explained in the Front Panel Switches
and Indicators section.
The following status items can be monitored using the Avenue Touch Screen Control Panel,
Express Panel, or PC Application:
Input Status•
Slot ID, Software Version and Board Revision•
Refer to the overall troubleshooting tips given below for the module:
No status lights are lit on front panel:
Check that frame power is present (green LED{s} on frame power supplies).•
Check that module is rmly seated in frame. Try removing it and plugging it in again.•
Can’t control module:
Check status of CPU Run green LED. Should be blinking slowly and in unison with •
other modules if System module is present. If not, try removing it and plugging it in
again.
System module may not be working properly if installed.•
No video or audio signal out of module:
Check status of In green LEDs. If not lit, check the input signal for presence and quality.•
Check cabling to input of module.•
You may also refer to the technical support section of the Ensemble web site for the latest
information on your equipment at the URL below:
http://www.ensembledesigns.com/support
SOFTWARE UPDATING
Software upgrades for each module can be downloaded remotely if the optional System
Control module is installed. These can be downloaded onto your PC and then Avenue PC will
distribute the update to the individual module. (Refer to the Avenue PC documentation for
more information.) Periodically updates will be posted on our web site. If you do not have the
required System Control Module and Avenue PC, modules can be sent back to the factory for
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Model 7925 Dual HD Downconverter
WARRANTY AND FACTORY SERVICE
Warranty
This Module is covered by a ve year limited warranty, as stated in the main Preface of this
manual. If you require service (under warranty or not), please contact Ensemble Designs
and ask for customer service before you return the unit. This will allow the service technician
to provide any other suggestions for identifying the problem and recommend possible
solutions.
Factory Service
If you return equipment for repair, please get a Return Material Authorization Number (RMA)
from the factory rst.
Ship the product and a written description of the problem to:
Ensemble Designs, Inc.
Attention: Customer Service RMA #####
870 Gold Flat Rd.
Nevada City, CA. 95959 USA
(530) 478-1830
Fax: (530) 478-1832
service@ensembledesigns.com
http://www.ensembledesigns.com
Be sure to put your RMA number on the outside of the box.
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Model 7925 Dual HD Downconverter
SPECIFICATIONS
Serial Digital Input
Number Two (one per channel)
Signal Type HD Serial Digital 1.485 Gb/s
SMPTE 274M, 292M or 296M
Impedance 75 Ohm, BNC
Return Loss >15 dB
Max Cable Length 100 meter Belden 1694A
Standards Supported
1080i (SMPTE 274M -4,5,6) 50, 59.94 or 60 Hz
720p (SMPTE 296M -1,2,3) 50, 59.94 or 60 Hz
1080p (SMPTE 274M -9,10,11) 23.98, 24, 25 Hz
1080sF (RP211 -14,15,16) 23.98, 24, 25 Hz
525i 59.94, 625i 50
Conversion Directions
Downconversion from
1080i/59.94, 720p/59.94, 1080p/23.98, 1080sF/23.98 to
525 (NTSC), or
1080i/50, 720p/50, 1080p/25, 1080sF/25 to
625 (PAL)
Reference Input
Number One internal
(frame master ref BNC)
Signal Type PAL or NTSC composite video
or HD Tri-Level Sync
HD Serial Digital Output
Number Four (two per channel)
Signal Type HD Serial Digital 1.485 Gb/s
SMPTE 274M, 292M or 296M,
SD Serial Digital 270 Mb/s
SMPTE 259M,
(Both 525 and 625 SD standards)
Impedance 75 Ohms
Return Loss >15 dB
Output DC None (AC coupled)
Delay 0 for HD outputs
www.ensembledesigns.com 7925-32
Model 7925 Dual HD Downconverter
SD Serial Digital Output
Number Four max
Jumper selectable, BNCs shared
with composite outputs
Each channel has two SD
outputs, selectable as
two SD SDI, or two composite,
or one SD SDI and one composite
Signal Type SD Serial Digital 270 Mb/s
SMPTE 259M
(Both 525 and 625 SD standards)
Impedance 75 Ohms
Return Loss >15 dB
Output DC None (AC coupled)
Delay 16.6 msec in 59.94 Hz systems
20 msec in 50 Hz systems
Analog Video Output
Number Four max
Jumper selectable, BNCs shared
with composite outputs
Each channel has two SD
outputs, selectable as
two SD SDI, or two composite,
or one SD SDI and one
composite
Signal Type PAL or NTSC composite
Impedance 75 Ohms
Return Loss >40 dB
Output DC <50 mV
Resolution 16 bit processing
Signal to Noise >65 dB
Frequency Response ±0.1 dB, 0 to 5.5 MHz
K Factor <1%
ScH Phase error <±2 degrees
Dierential Phase <1 degree
Dierential Gain <1%
Delay 16.6 msec in 59.94 Hz systems
20 msec in 50 Hz systems
www.ensembledesigns.com 7925-33
Model 7925 Dual HD Downconverter
Analog Audio Output
Number Two (selectable from sixteen)
Signal Type Balanced, transformerless
Impedance 30 Ohms
Maximum Output Level 24 dBu
Resolution 24 bits, 128x Oversampled
Reference Level -10 dBu to +4 dBu
Frequency Response ±0.1 dB, 20 Hz to 20 kHz
Crosstalk <102 dB
Dynamic Range >106 dB
Delay Automatic to match video
processing
Embedded Output
Support for all four groups (16 channels) from input to
output. Audio in SD output is delayed appropriately to
compensate for conversion.
General Speci!cations
Power Consumption 10 watts
Temperature Range 0 to 40°C ambient
(all specs met)
Relative Humidity 0 to 95%, noncondensing
Altitude 0 to 10,000 ft
www.ensembledesigns.com 7925-34
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