User's Manual
4. Commissioning
Page 24
MF0123A1F_FCC_uc Manual for PSR 700/800 MHz
Note: Ground of a second unit has to be connected to the same equipotential
bonding terminal as the repeater. Use bonding cables of the same length, as
short as possible and with a large wire cross section. Follow local electrical
code practices.
4.2.5. Connection of the Antenna Cables
The PSR has 4.3-10-type antenna connector. Please refer to section 4.2.3 for its
location. Refer to the corresponding documentation of the connector manufacturer for
mounting the cable connectors.
The bending radius of the antenna cables must remain within the given specifications.
Choose the type of cable best suited for the antenna. Consider that a cable with higher
loss is less expensive but impairs performance.
Notice: Use an appropriate torque wrench for the coupling torques:
- for 4.3-10 type connectors (5 Nm, 44 in lb) with 22 mm (7/8) in opening, e.g.
item no. TW-4310
Do NOT use your hands or any other tool (e.g. a pair of pliers)! This might
cause damage to the connector and lead to a malfunction of the signal booster.
Attention: To minimize passive inter-modulation (PIM) distortion, attention has to be
paid to the physical condition of the connector junctions:
• Do not use connectors that show signs of corrosion on the metal surface.
• Prevent the ingress of water or dirt into the connector.
• Use protective caps for the connectors when not mounted.
• Before mounting clean the connectors with dry compressed air.
• Before mounting clean the mating surfaces of the connector with a lint-free
alcohol-drenched cloth on a wooden or non-metallic item.
• Attach and torque the connectors properly.
• Avoid metallic abrasion when mounting the connectors by only screwing the
connecting nut, but not turning the whole connector.
• Use a torque wrench to fasten the connector, see above.
• Clean the protective caps before mounting for antenna cable replacement.
Note: To use the integrated “Donor Antenna Disconnection Alarm” (required by
UL2524), the antenna and antenna cable must fulfill special requirements;
see chapter 5.7.5 VSWR Check and Donor Calibration for details.