Intel Evaluation Board for Quad T1/E1 Applications LXD386 User Manual
Evaluation Board for Quad T1/E1 Applications — LXD386
Developer Manual
11
3.9
Line Buildout Selection
Switch block S2 is used to select the transmit pulse shaping for T1 mode operation, as well as T1/
E1 mode selection. The factory default is 000 (E1 mode). Refer to the LXT386 data sheet for T1
pulse shape details.
E1 mode selection. The factory default is 000 (E1 mode). Refer to the LXT386 data sheet for T1
pulse shape details.
3.10
Master Clock Setup
The on-board 2.048 MHz oscillator can be used for MCLK source. An additional 1.544 MHz
oscillator is included for use in T1 operation mode. A BNC connector (J1) is provided to allow use
of an external MCLK source. J1 is internally terminated into 50
oscillator is included for use in T1 operation mode. A BNC connector (J1) is provided to allow use
of an external MCLK source. J1 is internally terminated into 50
Ω
. Jumper block JP5 is used to
configure MCLK.
describes the options available with JP5. The factory setup for JP5 sets
internal oscillator timing as illustrated in
Figure 2. Default Switch Settings
NOTE:
OFF position = Low = ’0’
OFF position = Low = ’0’
1
2
3
4
O
F
F
A0
A1
A2
A3
S4
1
2
3
4
O
F
F
LEN2
LEN1
LEN0
S2
1
2
3
4
S1
5
6
7
8
9
10
LOW
HIGH
LOOP0
LOOP1
LOOP2
LOOP3
LOOP4
LOOP4
LOOP5
LOOP6
LOOP7
MODE
JASEL
1
2
3
4
O
F
F
CLKE
OE
MO-INT-CO
MUX
S3
Table 2. JP5 Jumper Settings
JP5 Setting
Operation
HIGH
Data recovery mode
EXT
External MCLK source at BNC (J1)
INT
Internal oscillator
LOW
Receiver power-down