indicate errors and alarms, but any other results displayed will be the results of a previous test.
Coupling TX and RX
When the TX and RX signal structures are required to be identical or symmetrical, coupling the Transmitter and Receiver is
possible. Tap on the blue "TX" or "RX" header to bring up the Copy menu. Copy menu options are Coupled, Tx=Rx, and Rx=Tx.
Accessing the Copy Menu
Copy Menu Options
Coupled:
TX and RX configurations are grouped as one block; TX and RX will have identical configuration. To uncouple
TX and RX settings, tap on the blue "Coupled" heading and select Independent from the Copy Menu.
Tx=Rx:
Tx blocks will copy the settings made in the Rx blocks
Rx=Tx:
Rx blocks will copy the settings made in the Tx blocks
Changes to the Setup are applied immediately unless an invalid parameter has been selected.
When the TX and RX signal structures need to be independent or asymmetrical, uncoupling the transmitter and receiver is
possible. For example, the TX could be sending a PRBS of 2^23-1 in a VC12 carried within an optical STM-64, while the RX
could be expecting to receive a PRBS of 2^23-1 in a 2Mbps E1 signal.
Signal Menu Options:
Hierarchy:
Allows the user to configure OTN/SDH, OTN/SONET, PDH signal and network types, including the bit rate and
higher order mapping, if applicable.
Interface:
Allows the user to select optical or electrical test ports. Optical test ports apply to OTN/SDH signal types only,
while electrical ports can apply to STTM-1E or PDH signals. Clock source and offset options are also configured in this
screen.
Structure:
Applies to SDH/SONET signals only and allows the user to configure lower order mapping and the channel
number.
Payload:
Applies to both SDH/SONET and PDH signals and allows the user to configure low rate signal (if applicable) and
associated framing.
Pattern:
Applies to both SDH/SONET and PDH signals and allows the user to configure the test pattern to be used. Use
the pattern drop-down box to select the test pattern which will be inserted into the transmitted signal. Pseudo Random Bit
Sequences (PRBS) defined by ITU-T 0.150 and 0.151 standards, fixed words and 24-bit or 32 bit user defined patterns are
available. Note: If the 32 bit user pattern entered is incorrect, the default pattern will be 0xFFFFFFFF.
Warning Message
While a test is running, it is possible to view the signal configuration, but it is not possible to change the setup or modify other
measurement settings. This warning screen is only shown during initial setup to alert the user.
Warning Message
RXT-3900 e-Manual D07-00-111P Rev A00
Summary of Contents for RXT3900
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