Digital Link DL600E, Руководство пользователя

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5-12 DL600E E1 Data Multiplexer UserÕs Guide
2
Set the external clock rate in the
EXT CLK
submenu. The clock
rate is in increments of 56K or 64K and the options are:
2048, 1984, 1920, 1856, 1792, 1736, 1728, 1680, 1664, 1624, 1600,
1568, 1536, 1512, 1472, 1456, 1408, 1400, 1344, 1288, 1280, 1232,
1216, 1176, 1152, 1120, 1088, 1064, 1024, 1008, 960, 952, 896, 840,
832, 784, 768, 728, 704, 672, 640, 616, 576, 560, 512, 504, 448, 392,
384, 336, 320, 280, 256, 224, 192, 168, 128, 112, 64
, 56
Digital Link recommends the external clock source be a square
wave of
50%
duty cycle,
TTL
level (that is,
0
to
2.4V
min)
The next section contains a detailed example of how to change
network settings.
Example of Setting Network Timing
In terminal mode, the default setting
for network timing is net/INT in Main/Alt Sync. (refer to Menu-4 Main
ConÞguration on in Chapter 3 ). On the front panel, the default setting
appears in two parts beginning with
NET TIMING
.
The example below shows how to change network timing.
1
From the top level, move to the
CONFIGURATION
menu with the
Up
or
Down Arrows
and press
ENTER
to open the submenu.
2
Open the
NET CONFIG
menu by using the
Up
or
Down Arrows
and pressing
ENTER
.
Open the
NET TIMING
submenu.
MAIN CLK NET
appears.
Press
ENTER
to activate edit mode.
(NET
starts to blink.)
ENTER
UNIT CONFIG NET CONFIG
TIMESLOT CONFIG
MONITOR TEST
EFS 100 PERCENT CONFIGURATION
ENTER
NET TIMING
ENTER
MAIN CLK NET