I. SDLC/HDLC Protocol
154001UA
I-13
Data Encoding
Data Encoding
Data Encoding
Data Encoding
Data Encoding
In
NRZ
encoding, a 1 is represented by a High level and a 0 is represented by a
Low level. In
NRZI
encoding, a 1 is represented by no change in level and a 0 is
represented by a change in level. The receive and transmit clocks will always be
derived from the data stream with NRZI encoding, so the clock source chosen is
ignored. However, a speed parameter
MUST
be selected, as it is used internally to
derive the clock.
Front Panel Access
From the
COMMAND MODE
display:
PRESS:
NEXT or LAST
until
CHNL PARAMETERS
displays on the second line
PRESS:
SELECT
PRESS:
NEXT or LAST
to choose a channel number
PRESS:
SELECT
PRESS:
NEXT or LAST
until
CHNL n ENCODING
displays on the second line
PRESS:
SELECT
The LCD displays:
2 03 1I-1 8
CHNL n ENCODING
Where
is NRZ
NRZI
PRESS:
NEXT or LAST
until desired option appears on the second line
PRESS:
SELECT
Terminal Access
To access the
DATA ENCODING
parameter from the Main Menu:
TYPE:
1
PRESS:
RETURN
TYPE:
n (n = channel number)
PRESS:
RETURN
TYPE:
3
from the
CHANNEL PARAMETERS
Menu
PRESS:
RETURN
