21
SHM-768K
WARNING: HIGH VOLTAGE
Disconnect the SHM-768K power cable before opening the top cover.
Table 3-2. SHM-768K Strap Selection.
Strap Identity Function
Possible
Factory
Settings
Setting
No. 1
Selects the data rate.
768
Baud Rate
512
(kbps)
384
256
256
128
No. 2
Selects the transmit timing signal
EXT
XMT CLK
from either: internal clock, external INT
INT
clock, or receive clock.
RCV
No. 3
Selects the transmit carrier mode.
ON
ON
CARRIER
When “ON,” transmit carrier
CNTRL
is constantly “ON.” When “CNTRL,”
transmit carrier is “ON” only when
RTS is high.
No. 4
Selects the transmit output level
0
0 dBm
XMT Level
to the line.
-6
(dBm)
No. 5
Enables Analog loopback
EN
DTE
command from the DTE (via Pin
DIS
DIS
Command
18) for EIA-530, or via Pin J for
ALB
V.35.
