5.6 DS3 Setup and Status
DS3 represents the 44.736 Mbit/s PDH layer. The Ports Setup screen gives
you access to the PDH layer setup for the transmitter and/or receiver of the
currently selected port.
DS3 allows transmission of data streams that are nominally running at the same
rate, however allowing for some variation in the speed around a nominal rate
(+/-125 ppm variation around 44.736 Mbit/s).
The DS3 frame has 56 bits of Overhead and 4704 bits of Payload, during the
period of 9398.3 Hz. According to the overhead assignment, there are M13
frame and C-bit frame.
DS3 Frame structure
The DS3 interface uses the electrical BNC connectors.
MU100010A Connector Panel
5.6.1 Transmitter Setup
5.6.1.1 Physical Setup
When the transmitter is set up with only a DS3 interface, selecting the Tx
button in the navigation area will launch the following screen.
For the switching method between PDH Tx and DSn Tx, refer to Physical
Setup in "E1 Setup and Status". Touch DS3 radio button. Touching Off radio
button disables the transmitter.
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