5'ATTCGGAACCCAATCACTG3 T 5'CGAGGTCGCTGTGTTTG3'
1.2. Estudio simultaneo del contenido de ADN y de la expresión de dos antigenos do membrana
ALCplus2 IDU equipment can be configured to operate with synchronization enabled or disabled.
When the synchronization is disabled, there is no management of synchronization: the clocks are gener-ated starting from the local internal reference.
When the synchronization is enabled, the synchronism source in input, enabled and with highest priority (if a forcing or a preferential is not active), is used to synchronize the local IDU.
The synchronization in output can be transmitted to the remote terminal using the tributaries A and/or B.
The user can enable or disable the management of the synchronization at his wish (pag.143).
Synchronism sources in input
The equipment is provided with more synchronism sources in input.
The number/type of synchronism sources in input depends on the type/expansion of equipment (Tab.4).
Enabling of the synchronism sources in input
A synchronism source must be enabled by the user to be used (pag.143).
The enabling of the synchronism sources which use the tributaries A or B, if configured with 2MHz interface, compromises the use of tributary A or B for the traffic (Tab.4).
Configuration of the synchronism sources in input
For some synchronism sources, it is possible to set the type of source and, for the tributaries A and B (E1), even the type of interface (2Mb/s or 2MHz) (Tab.4).
Priority of the synchronism source in input
A priority level can be associated to every synchronism source in input (pag.144).
The source with the highest priority level, and whose signal is valid, is used to synchronize the equipment (if a forcing or a preferential source is not active).
The priority level of the synchronism source is pointed out by a number between 1 and 9, where 1 points out the highest priority and 9 the lowest one.
Generally the equipment takes the synchronism from the source with the highest priority level: if this source is missing or is degraded, the synchronism is taken from the source with priority level immediately lower.
When the source with highest priority level returns to be valid, the equipment will automatically start to use it to take the synchronism. If all the synchronism sources (set by the user) become unavailable, the equipment automatically takes the synchronism from its own internal reference.
The degradation of the signal is caused by the presence of, at least, one of the following conditions:
• The source is not physically present.
• The difference between the source frequency and the internal reference source is greater than ± 9,2 ppm.
Forcing of a synchronism source in input
This function allows the user forcing a synchronism source in input as source from which the T0 synchro-nism is taken (pag.144).
This forcing is made without considering the status and the priority of the source.
This function must not be used for the normal operation of the synchronism. It is a maintenance operation and remains active until the user disables it or the Timeout period of the manual operations expires (if set).
Function of synchronism source in preferential input
This function allows the user choosing a source to use as preferential among those enabled (pag.145).
When the function of preferential source is not active, the internal synchronism is taken from the enabled source with highest priority.
When the function of preferential source is active for a source, this source will be used (in absence of alarms causing its degradation or forced sources) to take the internal synchronism independently from its priority level.
This condition is maintained until when the user disables the function of preferential source or the source signal becomes degraded.
Tab.4 Synchronism sources
* The type of interface depends on the setting made by the user for the management of the synchronism in output T12 (pag.148).
Source available only if the LAN is configured with electrical interface.
TE LAN-4 LAN Eth LAN-4.
Source available only if the LAN is configured with electrical interface.
T2/T3 1 E1 Tributary A can be configured as: T2 (2Mb/s) or T3 (2MHz)*.
T2/T3 2 E1 Tributary B can be configured as: T2 (2Mb/s) or T3 (2MHz)*.
RADIO (T0) Radio Synchronism from remote terminal.
Source available only when the radio is equipped (pag. 71).
IduBoard Exp.
16E1
TE LAN-3 LAN Eth LAN-3.
Source available only if the LAN is configured with electrical interface.
TE LAN-4 LAN Eth LAN-4.
Source available only if the LAN is configured with electrical interface.
T2/T3 1 E1 Tributary A can be configured as: T2 (2Mb/s) or T3 (2MHz)*.
T2/T3 2 E1 Source configurable as:
• Tributary B can be configured as: T2 (2Mb/s) or T3 (2MHz)*.
• E1 tributary of the expansion (1 - 16) RADIO (T0) Radio Synchronism from remote terminal.
Source available only when the radio is equipped (pag. 71).
IduBoard Exp.
2xSTM-1 32E1
TE LAN-3 LAN Eth LAN-3.
Source available only if the LAN is configured with electrical interface.
TE LAN-4 LAN Eth LAN-4.
Source available only if the LAN is configured with electrical interface.
T2/T3 1 E1 Tributary A with interface T2 (2Mb/s) or T3 (2MHz)*
T2/T3 2 E1 Source configurable as:
• Tributary B with interface T2 (2Mb/s) or T3 (2MHz)*.
• E1 tributary of the expansion (1 - 32) with interface T2 (2Mbit/s) RADIO (T0) Radio Synchronism from remote terminal.
Source available only when the radio is equipped (pag. 71).
STM-1 STM-1 STM-1.
Source available only if the management of the STM-1 stream is active STM-1 [1]
(T0) STM-1 First STM-1 stream.
Source available only if the management of 2 STM-1 streams is active (pag. 72) STM-1 [2]
(T0) STM-1 Second STM-1 stream.
Source available only if the management of 2 STM-1 streams is active (pag. 72)
IduBoard Exp.
Nod. 2xSTM-1 16E1
TE LAN-3 LAN Eth LAN-3.
Source available only if the LAN is configured with electrical interface.
TE LAN-4 LAN Eth LAN-4.
Source available only if the LAN is configured with electrical interface.
T2/T3 1 E1 Tributary A with interface T2 (2Mb/s) or T3 (2MHz)*.
When the source configured as T3 (2MHz) is activated, the tributary A cannot be used anymore as traffic tributary.
T2/T3 2 E1 Source configurable as:
• Tributary B with interface T2 (2Mb/s) or T3 (2MHz)*.
• E1 tributary of the expansion (1 - 16) RADIO (T0) Radio Synchronism from remote terminal.
The name and the configuration of the sources in input for the STM-1 stream and for the Nodal Bus change depending on the configuration of the equipment and are pointed out in Tab.5.
Tab.5 Availability of sources in input (ALCplus2 with IduBoard Exp. Nod. 2xSTM-1 16E1)
(1) See pag. 72.
(2) If a value is set for the source 1/NODAL A (T0) this value will not be available for the source STM-1/NODAL B (T0) and vice versa.
Internal synchronism T0
The synchronism source in input, which the internal synchronism T0 is taken from, is determined by the equipment controller according specific criteria:
• Forcing of the source
• Status of the source (enabled/disabled)
• Preferential source
• Priority of the source
• Status of the signal (valid/degraded)
The internal synchronism T0 can assume one of the following statuses:
• Locked, the input source, set for the creation of the T0 synchronism, is physically present, the relevant signal is valid and used by the equipment for the creation of the synchronism.
• Hold-over, all the possible sources in input are degraded; in this case the equipment keeps the estimated frequency of the last used external source.
• Free-running, the T0 synchronism is created by equipment inner reference (Internal Source), because the other input synchronism sources are not physically present, their sig-nal is degraded or they are disabled.
The user can force the status of the internal synchronism T0 (pag.147).
Equipment Configuration Synchronism sources in input for STM-1/Bus Nodale
STM-1 Management Nodal Bus
Management
Name Type Configuration
Inactive Active
1 STM-1 (1) Active
2 STM-1 (1) Inactive Active
X - - X - - -
-X - - - X Nodal 1 (T0) Nodal Bus Nodal Bus 1
Nodal 2 (T0) Nodal Bus Nodal Bus 2
- X - X - STM-1 (T0) STM-1 STM-1 stream
Source configurable as (2): - STM-1 stream (STM-1)
Source configurable as (2): - STM-1 stream (STM-1)
Source configurable as (2): - First STM-1 (STM-1 [1])
Source configurable as (2): - First STM-1 (STM-1 [1]) - Second STM-1 (STM-1 [2]) - Nodal Bus 1 (Nodal 1) - Nodal Bus 2 (Nodal 2)
The forcing of the status Hold Over or Free Running is not the normal operation of the T0 synchronism.
This forcing is not the normal operation of the synchronism T0. It is a maintenance operation and remains active until when the use disables it or the Timeout period of the manual operations expires (if set).
Synchronism in output T12
The user can set that the synchronism is provided in output to tributaries A and/or B (pag.148). In this case, however, the use of the tributary (A and/or B) as traffic tributary is compromised.
Moreover the use of the tributary A and/or B as output of synchronism T12 determinates the type of the interface of the tributary (A and/or B) used as synchronism source in input (see Tab.6).
Tab.6 Synchronism in output (T12)
* For the contemporary transport of synchronism and traffic see pag.255).