Broadcast TV Tuner and NICAM Audio Decoder unit
Features
- UHF/VHF TV tuner with high quality video output.
- NICAM audio decoder for high quality stereo audio.
- Analogue, mono FM and AES/EBU audio outputs.
- Versions available for all world TV standards.
- Stereo headphone jack and level control for monitoring.
- 99 Channel Memory, with electronic tuning.
- 1U 19" rack mounting unit.
BROADCAST OFF-AIR RECEIVER
- The Shootview NR728 Nicam Off-Air Receiver is a high quality UHF/VHF TV tuner
with an in-built NICAM decoder providing reception of high quality digital
stereo audio.
- There is provision for push button selection of up to 99 TV channels, with
electronic tuning.
- The 1U 19" unit provides a high quality video output, balanced line
level dual channel analogue outputs, balanced line level mono FM outputs and an
AES/EBU output.
- An LCD display shows the channel selected from memory, the actual channel
number tuned to, the channel frequency, the audio mode (i.e. stereo, mono FM
etc.), and the bit error rate.
- A facility is provided to adjust the bit error rate threshold at which the
audio mode reverts to mono FM.
- If the stereo signal is present it is decoded and fed to the main outputs.
The mono analogue signal can be selected manually if required. When the stereo
signal is not present the mono analogue audio channel is routed to the output.
If dual language programmes are transmitted as dual channels, either channel can
be selected or both received simultaneously.
Specification
| RF Freq. control |
- Channel Electronic Tuning
- Bands I, III, IV and V (E2-E69) for PAL
B/G version
- Bands IV and V (E21-E69) for PAL I version
- RF I/P Impedance :75 ohm
- Noise figure : 7dB
- Image Rejection : >50dB
- AGC Range : >65dB
- Sound carrier Rejection : >50dB
|
| VIDEO CHANNEL (measured after IF strip) |
- O/P Impedance : 75 ohm
- K Rating : <0.5%
- Line Time Non Linearity : <0.5%
- Diff Gain : <1%
- Diff Phase : 1º
- Chroma Luma Crosstalk : <1%
- S/N Luma : >60dB
- S/N Chroma : >60dB
- LF Periodic :<1%
- DC on O/P :<100mV
- Bandwidth : ±0.2dB to 5.5MHz
|
| AUDIO |
- O/P Impedance : <100 ohm
- O/P Level : 0dBm nominal
- Nicam 1 KHz distortion : >80dB
|
| R/F INPUTS |
- Belling Lee Coax Aerial Socket
|
| OUTPUTS |
- Video
- 4 off Encoded Composite - 1V
- Audio
- 2 off Left - balanced
- 2 off Right - balanced
- 2 off Mono FM - balanced
- 1 off AES/EBU
- Headphone :
- 1 off Stereo jack unbalanced
|
| POWER |
|
| MECHANICAL |
- CASE
- Width 19" rack mounting
- Height 1U (44mm)
- Depth 366mm including rear connectors
- Weight 4.55 Kg (packed)
|
| CONNECTOR TYPES |
- Video: BNC
- 2nd IF: BNC
- Audio: XLR
- UHF: Belling Lee Coax Aerial Skt
- Remote Control: D-9
- RS232: D-9
- Power: IEC
|
Specification subject to change without notice.
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Broadcast Video Teletext Decoder
Features
BROADCAST VIDEO TELETEXT DECODER
-
The VIP011 Teletext Decoder is based on a software controlled design. The use
of a microprocessor enables the access time of the system to be greatly reduced.
-
In earlier decoders the user selected a page number and when that page was
transmitted it was written to the screen. As the various databases increased in
size the access time for page selection also increased.
-
The VIP 011 uses a system known as FASTTEXT which has now
been implemented
by many broadcasters. Along the lower edge of the displayed page are the titles
of four other pages on a related topic. These are coloured red, green, yellow
and cyan. For each of these, a page number is stored in the software for rapid
retrieval of that page by pressing the the corresponding colour button on the
control panel. A fifth index page is tagged in a similar manner.
-
The decoder has two
independent acquisition circuits to acquire pages. The
first retrieves the page requested directly by the user, which is then displayed
and continuously updated. The second acquisition circuit retrieves approximately
60 other pages from the same magazine and then stores them in memory for
instant display. several of these pages are related to the current display page
by the FASTTEXT routes at the bottom of the displayed page.
-
If a page is requested that has already been stored in the memory, the page
will be displayed instantly. The page header at the top of the screen will be red
to show the page is from memory. When the page is re-transmitted by the
broadcaster a few seconds later, the display will be updated and the page header
will turn yellow. If the page requested was not in memory, because it was in a
different magazine or because it did not exist, the page header will turn cyan
and the current page number transmitted will roll through.
-
The VIP011 includes an on-board coder and keyer allowing encoded teletext to
be keyed into the background picture. Two outputs of this mixed Teletext and
background signal are provided together with an output of encoded Teletext alone
- one use of either of these outputs could be used as a source for broadcasting
teletext pages in-vision. RGB outputs of teletext, plus Mixed Sync and a Key
signal (know as Fast Blanking or FB) are also provided, so encoding and keying
can be done externally if required.
-
The unit is housed in a 19" 1U frame with controls located on the front
panel of the unit. The controls are listed in the VIP011 Specification. An
optional remote control facility is available,
Specification
Operations
| Video Input 1 to 4: |
Selects on of the four video inputs. |
| Keypad Buttons 0 to 9: |
Selects page to be displayed between 100 and 999 |
| Text: |
Selects text or picture. |
| Mix: |
Selects text superimposed on picture. |
| Cancelled by pressing text. |
| Scroll Up/Down: |
Scrolls text up/down screen. |
| Page Up/Down: |
Increments selected page upward/ downward. |
| Index: |
Toggles between header page (100 or 400 for CH4) and |
| Index page (199 or 699 for CH4) |
| Reveal: |
Reveals hidden text (e.g. concealed answers) |
| Update: |
When pressed, text is removed from the screen until
a selected page is received, or if used with newsflash,
when the news changes. Pressing Update when no
text is displayed will reveal the clock. |
| Hold: |
Holds the displayed sub-page and prevents it from
updating. |
| Red, Green, Yellow. Cyan: |
Selects one of the broadcaster's option pages. |
|
There is also an "Expand" facility, which is
selected by pressing Reveal and Update. Pressing once will change the
display to the top 1/3rd of the text, pressing again will display the
full page. |
| VIDEO INPUTS |
Composite
Video: |
4
off 1V into 75ohm |
| OUTPUTS |
RGB |
1 off each
700mV into 75ohm |
| Composite
(coded teletext) |
1 off 1V into
75ohm |
| Video
(mixed bgnd & text) |
2 off 1V into
75ohm |
| MS (mixed
sync) |
1 off 2V into
75ohm |
| FB (fast
blanking - key) |
1 off 2V into
75ohm |
| POWER |
- 98-125V or 198-250V (20VA nominal)
|
| MECHANICAL |
- CASE
- Width 19" rack mounting
- Height 1U (44mm)
- Depth 260mm including rear connectors
- Weight 5 Kg (packed)
|
| CONNECTOR TYPES |
- Video and Pulse BNC
- Power (mating supplied) IEC
|
Specification subject to change without notice
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Broadcast Sync and Video processor unit
Features
BROADCAST VIDEO PROCESSOR
-
The VIP750 Sync and Video Processor was originally designed for use with
Cable TV Head Ends, but it has a wide range of other applications.
-
In the case of Cable TV Head Ends, the signals from satellite channels
arriving at the Head End can vary in amplitude, and in quality generally, for a
number of reasons. In particular the sync pulses can be distorted and low
amplitude, which could adversely affect the performance of
"downstream" equipment.
-
To prevent this type of problem the satellite signal is fed via the VIP750,
which locks on to the signal, "blanks" the original sync pulses and
replaces them with regenerated and correctly shaped pulses. The VIP750 also
provides separate control of video amplitude, sync amplitude and HF response.
-
A relay by-pass circuit is incorporated, which is activated in the event of
power failure.
-
There are three separate Sync and Video Processors per VIP750 card. The card
can be housed in a 1 U 19" rack unit, accommodating up to three cards, or
in a 3U rack unit accommodating up to 14 cards and providing a possible total of
42 channels.
Specification
| |
- nput Impedance 75ohm
- Output Impedance 75ohm
- Input return loss >36dB to 5.5MHz
- Output return loss >34dB to 5.5MHz
- Frequency response ±0.02dB to 6MHz
- Differential Gain < 0.1%
- Differential Phase < 0.1°
- K rating < 0.5%K
- Hum & noise <-76dB rms weighted
|
| OUTPUTS |
- 2 off 1V into 75ohm outputs per channel (one via relay by-pass)
|
| POWER |
|
| MECHANICAL |
- Width 19" rack mounting
- Height 1U (44mm) or 3U (134mm)
- Depth 410mm including rear connectors
- Weight 5 Kg or 12 Kg (packed)
|
| CONNECTOR TYPES |
- Video BNC
- Power (mating supplied) IEC
|
Specification subject to change without notice
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Shootview Ltd. 87
Cadbury Road, Sunbury
on Thames Middlesex.
TW16 7LS England.
Telephone:
+44 (0) 1932 782823 Fax:
+44 (0) 1932 772824 E-mail:
Sales@Shootview.com
For
directions to Shootview Click here. For
Product Listing Click here.
For web development /
design please
contact H via email hsr1234@aol.com.
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