Albalá Ingenieros TTD3000C03 User manual

TTD3000C03
DUAL DISTRIBUTOR / CHANGEOVER WITH 2 LOOP-THROUGH INPUTS TO
5+5 OUTPUTS WITH TTL DIGITAL LEVEL AND 50 AND 75 OHMS OUTPUTS
Version 1.0
Albalá Ingenieros, S.A.
Medea, 4 - 28037 Madrid - Spain
23 September 2016 - © Albalá Ingenieros S.A. - All rights reserved

TTD3000C03

TTD3000C03
DUAL DISTRIBUTOR / CHANGEOVER WITH 2 LOOP-THROUGH INPUTS TO 5+5
OUTPUTS WITH TTL DIGITAL LEVEL AND 50 AND 75 OHMS OUTPUTS
Version 1.0
1. DESCRIPTION ...................................................................................................................... 5
1.1. The TTD3000C03 ............................................................................................................................ 5
1.2. Features ............................................................................................................................................. 6
1.3. Block diagram .................................................................................................................................. 7
2. SPECIFICATIONS ................................................................................................................. 9
3. INSTALLATION .................................................................................................................. 11
3.1. Initial inspection .......................................................................................................................... 11
3.2. Safety instructions ...................................................................................................................... 11
3.3. Environmental considerations ................................................................................................ 12
3.4. Power considerations ................................................................................................................. 12
3.5. Installing the module in the mounting frame ................................................................... 12
3.6. Interconnection ............................................................................................................................ 14
4. OPERATION ...................................................................................................................... 17
4.1. Front panel description .............................................................................................................. 17
4.2. Functional description ............................................................................................................... 18
4.3. Module remote control and supervision ............................................................................. 20
4.3.1. Details of the TTD3000C03 registers ........................................................................... 21
5. GLOSSARY ........................................................................................................................ 23
6. REGULATIONS .................................................................................................................. 25
7. VERSIONS ......................................................................................................................... 27

TTD3000C03

Albalá Ingenieros | Manual TTD3000C03
1. DESCRIPTION
1.1. The TTD3000C03
The TTD3000C03 is a distributor module for TTL level digital signals transmitted over
coaxial cabling. The unit consists of two identical sections, each of which is a distributor
with one loop-through input and five outputs each.
In addition to the components used for signal distribution, each section provides a signal
presence detector, a frequency measurement circuit and a selector to determine which
input will be distributed. These elements make it possible to use the TTD3000C03 as a
sole distributor with one loop-through input and ten outputs, or as an automated switch
between the two inputs.
The TTD3000C03 provides front panel LEDs that indicate both the input selected for
each section and the status of the inputs.
The impedance of the outputs is configurable to either 50 or 75Ω.
It is possible to monitor the TTD3000C03 status remotely using a communications
controller module installed in the same mounting frame. In addition, certain controller
modules provide SNMP management and the ability to record events in a file including
date and time information for further analysis.
The TTD3000C03 is a TL3000 terminal line module and can be housed in a three rack
unit (3 RU) UR3000 mounting frame or a 1 RU UR3100 mounting frame.
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Albalá Ingenieros | Manual TTD3000C03
1.2. Features
• Dual TTL-level digital signal distributor.
• Provides two sections with one loop-through input and five outputs each.
•Can be configured as one sole distributor with one input with loop-through and ten
outputs.
•Hysteresis on the input circuits allows proper distribution of signals with slow slew
rates.
•Supervises the presence and frequency of the signals at the inputs and flags a failure of
the signal is missing or its frequency is outside of the established range.
• Can operate as an automated switch between the two inputs.
• Is appropriate for distribution for Word-clock and 1 PPS signals.
• The impedance of the outputs is configurable to either 50 or 75Ω.
•Module control and supervision can be done remotely when the mounting frame is
equipped with a communications controller module.
•One UR3000 mounting frame can house up to 12 TTD3000C03 modules. If power
supply redundancy is required and FA3000 or FA3001 modules are used then only 10
modules can be housed in the mounting frame. If PSU3300 or PSU3301 modules are
used for this purpose then up to 12 modules can be installed.
• One UR3100 mounting frame can house up to three TTD3000C03 modules.
• Low power.
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Albalá Ingenieros | Manual TTD3000C03
1.3. Block diagram
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Albalá Ingenieros | Manual TTD3000C03
TTD3000C03
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Albalá Ingenieros | Manual TTD3000C03
2. SPECIFICATIONS
TTL signal input
Connector BNC
Type Passive Loop-Through
Number of inputs 1 per section, 2 sections
Threshold levels:
VIH min. 2.0 V
VIL max. 0.8 V
Allowed voltage range 0 .. 5 V
TTL signal output
Connector BNC
Impedance 50Ω ± 1 % or 75Ω ± 1 % configurable
Number of outputs 5 per section
Voltage levels with loaded output:
VOL max. 0.4 V
VOH min. 3 V
Rise and fall time <5 ns
Skew between outputs <600 ps
Skew between outputs <800 ps 1 to 10 mode
Input to output delay <70 ns
General
Maximum power supply current + 750 / - 750mA max.
Maximum power supply current + 400 / - 400mA 50 % duty cycle
Operating temperature range 0 .. 50 °C
Approximate weight 300 g
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Albalá Ingenieros | Manual TTD3000C03
TTD3000C03
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