Motorola BLE100 - Manual (Page 31)

3-10 Amplifier Setup
BLE100 Installation and Operation Manual
8 Check the amplifier output tilt by measuring the high band- and low band-edge carriers.
ƒ High = channel 116 (745.25 MHz), channel 136 (865.25 MHz), or channel 158
(997.25 MHz)
ƒ Low = channel 2 (55.25 MHz) or channel 3 (61.25 MHz)
ƒ If the tilt is less than required, install a higher value input equalizer.
ƒ If the tilt is greater than required, install a lower value input equalizer.
ƒ If the high value equalizer provides too much tilt and the low value equalizer provides
too little tilt, use the lower value equalizer. Under-equalization is preferred to
over-equalization.
If the amplifier was set up using an SCS-*, the JXP input pad must be increased or
decreased by the amount of change made in the SCS-* value. Therefore, to maintain a
proper gain level, it is necessary to adjust the input pad value as follows:
ƒ For each increase in SCS value, decrease the input pad by 1 dB.
ƒ For each decrease in SCS value, increase the input pad by 1 dB.
ƒ If you replace an SFE with an SCS, reduce the value of the input pad by the value of the
SCS.
9 Measure the output level at the highest frequency.
It should be within 1 dB of the system design level. If it is not, you must adjust the
mid-stage pad (
JXP MID ) accordingly. Refer to Section 6, “Operating Tips,” for mid-stage
padding information and recommendations.