Features & Benefits
- Switches Analog Black and Serial
Digital Video, Both Standard and High-definition, and Digital Audio
- Eleven User-configurable Signal Channels
- Amplitude
Detection on All Channels
- Electrical Fast Switch Function
for Input Channels 4 to 6, with Option ELSW
- Automatic or
Manual Operation
- Fault and Operating Mode Front-panel Indicators
Applications
- Provides Complete Fault Tolerance
when Used as a Switch Between Primary and Backup SPGs or TSGs
The
ECO422D is a highly versatile sync changeover unit designed for use
in a serial SD/HD digital television environment. The ECO422D will
accommodate component or composite serial digital video signals, AES/EBU
digital audio, tri-level sync, and analog black-burst signals. This
flexibility makes the ECO422D ideal for both the mixed-format and
all-digital television facility.
The ECO422D provides eleven
user-configured channels, each channel consisting of primary and backup
inputs, and an output.
- Six channels can be set for high-definition
serial digital video, standard-definition serial digital video, AES/EBU
digital audio, tri-level sync, and PAL or NTSC analog black burst
- Five channels may be set for standard-definition serial digital
video, AES/EBU digital audio, tri-level sync, and PAL or NTSC analog
black burst
Channel configuration is by internal DIP
switch. Signal amplitude fault detection level follows the setting
of the channel configuration switches. Detection on individual channels
may be disabled, giving the option of disabling changes to the backup
unit on failure of signals not critical to the facility operation.
When operated in the switch-on-fault mode, the ECO422D will automatically
select the backup sync source should any of the primary inputs fail.
However, in the unlikely event both sync sources are faulty, the ECO422D
will not alternate between the two sources. If necessary, this function
may be overridden with the manual sync source selection. Manual source
selection also facilitates periodic testing of the changeover function.
Switching is by mechanical relay with all channels switched simultaneously.
The Electrical Fast Switch function, available with Opt. ELSW,
improves the changeover switching speed between inputs, and replaces
the mechanical relay on channels 4-6. Using this type of switch minimizes
disturbance when switching between primary and backup inputs. With
Opt. ELSW, channels 4-6 can only accept a black-burst or tri-level
sync signal.
Front-panel controls are provided for source selection,
operating mode, resetting the fault indicators, and for disabling
the front-panel controls. LED indicators are also provided. Indication
of fault and unit on line is also available through the remote connector.
Characteristics
Inputs and Outputs
Return Loss -
Channels 1-6:
30 dB, 0 to 10 MHz.
15 dB, 10 to 750 MHz.
10 dB, 750 MHz to 1.5 GHz.
Channels 7-11:
30 dB, 0 to 10 MHz.
15 dB, 10 to 270 MHz.
12 dB at 360 MHz (15 dB typical) when selected.
Channels
4-6 (with Opt. ELSW):
30 dB, 0 to 10 MHz.
Insertion
Loss -
Channels 1-6: 0.2 dB, DC to 10 MHz.
In a frequency
range of 10 MHz to 1.5 GHz, the instrument approximates less than
20 meters of Belden 1694A cable.
Channels 7-11:
0.2 dB,
DC to 10 MHz.
0.5 dB, 10 to 200 MHz.
1.0 dB, 200 to
360 MHz.
Channels 4-6 (with Opt. ELSW):
0.3 dB, DC to
10 MHz
Maximum Switched Voltage -
All channels:
±5 V
Channels 4-6 (Opt. ELSW):
±1 V (only for the
tri-level sync and analog black-burst signals).
Maximum
Switched Current - 100 mA.
Crosstalk (Unselected input
to output or channel to channel) -
Channels 1-6:
-60 dB
to 10 MHz.
-30 dB to 1.0 GHz.
-20 dB to 1.5 GHz.
Channels 7-11:
-60 dB to 10 MHz.
-30 dB to 200 MHz.
-15 dB to 360 MHz.
Channels 4-6 (Opt. ELSW):
-55 dB
to 10 MHz.
-45 dB to 30 MHz.
Relay Switch Time
- Time that it takes for the relays to switch and settle. Approximately
10 ms.
Channel Switch Time (Channels 4-6, Opt. ELSW only)
- Time that it takes for the channel to switch and settle. Approximately
100 ns.
Amplitude Detection - The ECO422D will determine
a fault condition exists when the input signal is less than 2 dB from
the nominal level. The following are the amplitude ranges for the
various types of input signals that will result in a fault condition.
Black Burst -
NTSC: 180 to 225 mV.
PAL: 190
to 235 mV.
Tri-level: 150 to 210 mV.
Serial
Digital Video - 505 to 630 mV.
AES/EBU Digital Audio
- 630 to 790 mV.
Power Source
Mains Ranges
-
Voltage: 100 to 240 VAC, ±10%.
Frequency: 48 to 62 Hz.
Power consumption: 25 W maximum.
Environmental
Temperature -
Operating: 0 °C to +40 °C, IEC1010-1
compliance.
Nonoperating: -40 °C to +65 °C.
Altitude -
Operating: To 6562 feet (2000 meters), IEC1010-1
compliance.
Regulatory
EMC - Certified
to the EMC Directive 89/336/EEC.
Safety -
Approved
to: UL3111-1, CAN/CSA-C22.2 No.1010.1.
Complies with: EN61010-1,
IEC1010-1.
Physical Characteristics
|
Dimension
|
mm
|
in.
|
|
Height
|
44
|
1.734
|
|
Width
|
483
|
19.0
|
|
Depth
|
561
|
22.1
|
|
Weight
|
kg
|
lb.
|
|
Net
|
4.9
|
10.8
|
|
Shipping
|
8.3
|
18.3
|
