Technical Documentation

M320 RJ-48 Connector Pinouts for the Control Board External Clock Inputs

The two inputs on the CB labeled EXTERNAL CLOCK INPUT are RJ-48 receptacles that accept RJ-48 cables for connecting the CB to 19.44-MHz Stratum 3 reference clocks. For more information, see M320 Control Board (CB) Description. Table 1 describes the RJ-48 connector pinouts.

Table 1: RJ-48 Connector Pinouts

Pin

Signal

1

EXT_RRING (negative input clock)

2

EXT_RTIP (positive input clock)

3

Shield ground

4

EXT_TRING (negative output signal—not a clock)

5

EXT_TTIP (positive output signal—not a clock)

6

Shield ground

7

Not used

8

Not used

Published: 2009-09-26