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P31003-H3560-S403-54-7620, 09/05
HiPath 3000 V6.0, HiPath 5000 V6.0, Provisional Service Manual
3-287
Boards for HiPath 3000
Peripheral Boards
Jumpers S2 and S3 for GND connection
You can set the GND connection (signal ground) of the receiving (Rx) and transmitting (Tx)
lines on the CAS side here.
Recommendations for the GND connection:
● symmetric line (120 ohms)
Ground the cable’s shield on the side of the connected device (NT, MUX, modem).
● coaxial line (75 ohms)
Do not ground the shield on both ends of the cable.
– Tx: Ground the cable’s shield on the TMCAS side.
– Rx: Ground the cable’s shield on the side of the connected device (NT, MUX, modem).
GND connection Jumper setting
no signal ground (default) S2 = 1 - 2, S3 = 1 - 2
signal ground on receive lines (Rx) on the CAS side S2 = 2 - 3
signal ground on the transmit lines (Tx) on the CAS
side
S3 = 2 - 3
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