Hitachi CMU Series User Manual page 94

(4) Tips on installing transceivers
Be careful when driving transceiver pins not to let in coaxial cable shield chips.
⇒ Coaxial cable shield chips could the shield and conductor to be short-circuited to each
other.
Drive tap type transceiver pins straight.
⇒ If transceiver pins are driven slantwise, coaxial cable shield chips could the shield and
conductor to be short-circuited to each other. Further, the insulator at the pin tip
might crack causing a short circuit between the shield and conductor.
Do not install a transceiver at a bent section of a coaxial cable. Be sure to install one at a
straight section of a coaxial cable.
⇒ Obliquely driven pins could bring about phenomena similar to those described above.
When using a flame-retardant coaxial cable, use a connector type transceiver as a rule.
⇒ Flame-retardant coaxial cables more susceptible to the effects of external torsion than
regular standard coaxial cables because such force cause their internal conductor to
rotate slightly.
When using a flame-retardant coaxial cable for a tap type transceiver, camp the coaxial
and transceiver in the enclosure or else to protect the cable from external forces imparted
in rotating direction.
(5) Tips on laying transceiver cables
Before connecting or disconnecting a transceiver cable to or from a unit, switch it off.
Allow a bending radius of at least 80 mm when both laying and finally clamping
transceiver cables.
Pay special attention to the bending of the connector attachment.
Transceiver
Figure 5-9 Transceiver Installation (3)
Coaxial cable
5-9
5 USER GUIDE