The SDH Access Tester application
Page 54 Acterna ANT-5
4.4.7 Hierarchy Setup Rx
Selecting the Hierarchy element for the
receive path opens the Hierarchy Setup Rx
panel, allowing either SDH or PDH framing
types to be selected.
If PDH is selected, the PDH line rate is
determined by the Bit Rate selected in the
PDH Setup screen.
The signal structure always appears with a
test pattern source and test pattern detector. The user may wish to disregard the BER
features, whilst only monitoring SDH or PDH defects, if required.
Set the Test type to Inline monitor to monitor signals at the electrical monitor point
without the need for optical spitters. The inline monitor allows the unit to be connected
in circuit for monitoring live links. The received signal is re-transmitted unaltered and
simultaneously monitors for alarms and errors. This is useful when in-service quality
measurements are required on optical circuits where there is no access to optical
splitters.
Note 1: The optical Rate for STM-1, STM-4 and STM-16 are also selectable if the
options have been purchased and enabled.
Note 2 AU-3 Mapping will also become selectable if the option has been purchased
and enabled.
4.4.8 Interface Setup Rx
Selecting the Interface element for the receive
path opens the Interface Setup Rx panel,
allowing electrical and optical options to be
selected.
Input The input interface can be set to either Optical or Electrical. If a
PDH structure has been selected in the Hierarchy setup, the
optical options will be disabled. If an SDH structure has been
selected and the ANT-5 is equipped with an optical interface,
both electrical and optical options will be available.
If the Optical interface is selected, the receiver interface will
automatically detect and select the received wavelength, either
1310nm or 1550nm, depending upon which optical options have
been fitted to the instrument.
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