Albalá Ingenieros TTD2000C01 User manual

TTD2000C01
DISTRIBUTOR WITH 1 INPUT TO 4 OUTPUTS FOR TTL OR 10 MHz (50 OR 75
OHMS IMPEDANCE) REFERENCE SIGNAL
Version 1.0
Albalá Ingenieros, S.A.
Medea, 4 - 28037 Madrid - Spain
07 June 2017 - © Albalá Ingenieros S.A. - All rights reserved

TTD2000C01

TTD2000C01
DISTRIBUTOR WITH 1 INPUT TO 4 OUTPUTS FOR TTL OR 10 MHz (50 OR 75
OHMS IMPEDANCE) REFERENCE SIGNAL
Version 1.0
1. DESCRIPTION ...................................................................................................................... 5
1.1. The TTD2000C01 ............................................................................................................................ 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. Installing the module in the mounting frame ................................................................... 12
3.5. Interconnection ............................................................................................................................ 13
4. OPERATION ...................................................................................................................... 15
4.1. Front panel description .............................................................................................................. 15
4.2. Functional description ............................................................................................................... 16
4.3. Module remote control and supervision ............................................................................. 18
4.3.1. Details of the TTD2000C01 registers ........................................................................... 19
5. GLOSSARY ........................................................................................................................ 21
6. REGULATIONS .................................................................................................................. 23
7. VERSIONS ......................................................................................................................... 25

TTD2000C01

Albalá Ingenieros | Manual TTD2000C01
1. DESCRIPTION
1.1. The TTD2000C01
The TTD2000C01 is a distributor module for analog or digital signals transmitted over
coaxial cabling. The module can operate autonomously or in tandem with other
modules installed in the same mounting frame.
When operating autonomously, the module acts as a distributor from one input to four
outputs. In this case the user can select whether the module operates as a linear
amplifier or as a comparator with TTL level output drivers.
When operating as a linear amplifier, the wide bandwidth and high dynamic range make
the TTD2000C01 appropriate for distribution of 10MHz reference signals. When
operating as a comparator the module can be used for re-clocking of digital signals such
as 1 PPS or Word clock.
When operating in a mounting frame that contains a GPS2000C01, the TTD2000C01 can
be used to increase the number of 1 PPS or 10MHz outputs using the redundant signals
that the GPS2000C01 delivers to the bus of the mounting frame. In such cases, each
TTD2000C01 installed in the frame provides five outputs that can be: all 1 PPS, all
10MHz or two of one type and three of the other as desired.
The input impedance and output impedances are configurable as 50 or 75Ω.
It is possible to monitor the TTD2000C01 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 TTD2000C01 is a TL2000 terminal line module and can be housed in a two rack unit
(2 RU) UR2000 mounting frame.
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Albalá Ingenieros | Manual TTD2000C01
1.2. Features
• A distributor of analog or digital signals transmitted over coaxial cabling.
•Capable of autonomous operation or together with other modules installed in the same
mounting frame.
•When operating autonomously the device works as a distributor from one input to four
outputs and functions as a linear amplifier or as a comparator with TTL level output
drivers.
•When operating in a mounting frame that contains a GPS2000C01, the TTD2000C01
can be used to increase the number of 1 PPS or 10MHz outputs using the redundant
signals that the GPS2000C01 delivers to the bus of the mounting frame. In such cases,
each TTD2000C01 installed in the frame provides five outputs that can be: all 1 PPS, all
10MHz or two of one type and three of the other as desired.
• Apt for distribution of 10MHz, 1 PPS and Word clock reference signals.
• The input impedance and output impedances are configurable as 50 or 75Ω.
•Module control and supervision can be done remotely when the mounting frame is
equipped with a communications controller module.
• Low power.
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Albalá Ingenieros | Manual TTD2000C01
1.3. Block diagram
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Albalá Ingenieros | Manual TTD2000C01
TTD2000C01
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Albalá Ingenieros | Manual TTD2000C01
2. SPECIFICATIONS
Signal amplifier
Gain 0dB ± 0.5 dB
Dynamic range -1.5 .. +3.5 V
Dynamic range + 13 dBm
3 dB cuttoff frequency:
Lower DC referece level 0dB
at 70 MHz
Upper >50MHz referece level 0dB
at 70 MHz
Input to output delay 10 ns
TTL signal input
Connector BNC
Impedance 50Ω ± 3 %
Number of inputs 1 per section, 2 sections
Threshold levels:
VIH min. 2.0 V
VIL max. 0.8 V
Allowed voltage range - 0.3 .. 5 V
TTL signal output
Connector BNC
Impedance 50Ω ± 2 %
Return loss >30dB up to 10 MHz
Number of outputs 4 per section
Voltage levels with loaded output:
VOL max. 0.5 V
VOH min. 3.0 V
Rise and fall time <20 ns
Skew between outputs <600 ps
Input to output delay 12 ns
Input to output delay <130 ns
General
Power consumption 3.0 W
Operating temperature range 0 .. 50 °C
Approximate weight 140 g
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Albalá Ingenieros | Manual TTD2000C01
TTD2000C01
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