| Specifications |
| Inputs |
| PRIMARY inputs |
1 input each for 11 channels (75  BNC connector) |
| BACKUP input |
1 input each for 11 channels (75 BNC connector) |
| Outputs |
| OUTPUT outputs |
1 output each for 11 channels (75 BNC connector) |
| Input/Output Characteristics (CH1 to CH11) |
| Return Loss |
30 dB 0 to 10 MHz
15 dB 10 MHz to 750 MHz
10 dB 750 MHz to 1.5 GHz |
| Insertion Loss |
0.2 dB 0 to 10 MHz
0.5 dB 10 MHz to 200 MHz
2.0 dB 200 MHz to 1.5 GHz |
| Cross Talk |
-60 dB 0 to 10 MHz
-30 dB 10 MHz to 1.0 GHz
-20 dB 1.0 GHz to 1.5 GHz |
| Delay for Starting the Monitor |
| |
Select from two delay settings for starting the error monitor at power up according to the rise time of the system signal source connected to the LT 444. |
|
| FAST |
1 minute or more (60 to 80 s) |
| SLOW |
4 minutes or more (240 to 320 s) |
| Input Signal Type |
| |
Set the type of input signal applied to the LT 444 using the internal dip switch. |
|
| Signal Type |
HD-SDI (CH1 to CH6 only)
SD-SDI (270 Mb/s)
SD-SDI (143 Mb/s)
AES/EBU digital audio
Tri-level sync signal
NTSC black burst
PAL black burst |
| Determination Criteria of the Signal Level |
| Detection Level |
Detects an error when the amplitude of the input
signal drops by 2 to 5 dB from the defined level and
makes the switch.
The detection level varies slightly depending on the
type of signal specified using the internal dip switch.
The detection level can be set to LOW or HIGH for
each signal type. |
| Detection Reference Level |
| *1 |
The signals levels inside the parentheses are those during normal conditions. |
|
When the Determination
Criteria is Set to Low |
| HD-SDI |
| (CH1 to CH6 only) : |
450 to 635 mV (800 mV) |
| |
| SD-SDI |
| (270 Mb/s) : |
450 to 635 mV (800 mV) |
| (143 Mb/s) : |
450 to 635 mV (800 mV) |
| |
| AES/EBU audio : |
631 to 794 mV (1000 mV) |
| NTSC black burst : |
-180 to -227 mV (-286 mV) |
| PAL black burst : |
-190 to -238 mV (-300 mV) |
| Tri-level sync : |
337 to 476 mV (600 mV) |
|
When the Determination
Criteria is Set to HIGH |
| HD-SDI |
| (CH1 to CH6 only) : |
505 to 713 mV (800 mV) |
| |
| SD-SDI |
| (270 Mb/s) : |
505 to 713 mV (800 mV) |
| (143 Mb/s) : |
505 to 713 mV (800 mV) |
| |
| AES/EBU audio : |
734 to 924 mV (1000 mV) |
| NTSC black burst : |
-210 to -264 mV (-286 mV) |
| PAL black burst : |
-220 to -277 mV (-300 mV) |
| Tri-level sync : |
379 to 535 mV (600 mV) |
|
| User-Defined Detection Level Setting (CH7 to CH11 only) |
| USER setting 1 |
Set between -100 mV to -700 mV *2 |
| USER setting 2 |
Set between -100 mV to -700 mV *2 |
| Expansion of the Detection Level Using the Attenuator (CH7 to CH11 only) |
| |
Set the internal attenuator to expand the detection level further by 5 times |
|
| USER setting 1 |
Set between -700 mV to -3500 mV *2 |
| USER setting 2 |
Set between -700 mV to -3500 mV *2 |
| *2 |
When a signal equivalent to the H.SYNC waveform is applied.
The specifications of the detection level may not be achieved depending on the waveform shape. |
|
| Error Display |
| Total Error LED |
Notifies errors by illuminating the error LED on the panel. |
| Error Channel LED |
Detects the channel causing the error and notifies
the channel by illuminating the corresponding LED. |
| Panel Key Lock |
| Time to Key Lock |
The key lock is automatically enabled when key
operation is not detected for 60 s. |
| External Control (REMOTE) Connector |
| Application |
For external remote control. |
| Inputs |
RESET, AUTO SWITCHING, and TOGGLE SYNC |
| Outputs |
FAULT and SYNC SOURCE |
| Connector Type |
9-pin Dsub connector |
| Environmental Conditions |
| Operating Temperature Range |
0 to 45 °C |
| Operating Humidity Range |
 90 % RH (without condensation) |
Spec Guaranteed
Temperature Range |
5 to 40 °C |
Spec Guaranteed
Humidity Range |
85 % RH (without condensation) |
| Operating Environment |
Indoor use |
| Operating Altitude |
Up to 2,000 m |
| Overvoltage Category |
II |
| Pollution Degree |
2 |
|
| Power Requirements |
90 to 250 VAC (no switching necessary), 50 Hz/60 Hz,
25 W max. |
| Dimensions |
426 (W)  44 (H) 560 (D) mm (excluding protrusions) |
| Weight |
4 kg |
| Accessories |
Rack Supports.....2
Rack support attachment screws.....4
Power cord.....1
Instruction manual.....1 |
