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th
5
bit: sending side 'TX-grounded;
th
6
bit: receiving side 'RX-grounded;
th
7
bit: impedance adjustment at the receiving side
th
8
bit: impedance adjustment at the sending side
Attention: Set according the above table, or else the E1 interface will be abnormal.
4.4. Inside Jump pin definition
When the user want to adjust the internal jump pin, please do it under the guidance or
agreement of Dynamix technical engineer. Usually it is not necessary; unless it is in
sever environment or disturbance.
After opening the case, you can see two groups of Jump pin (JP2 and JP3) on the
upper layer of the circuit board. Its position, order of pin and default configuration is as
follow:
Definition of Jump pin:
JP2
1:PGND
protection ground
2:BNC_GND BNC screened layer
3:GND
working ground
The default setting is 1-2 pins short-circuited.
JP3
1:PGND
protection ground
2:GND
working ground
3:NC
No definition
The default setting is 1-2 pins short-circuited.
16
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