C-COR Flex Max901e Equipment Manual page 80

5
5-24 Flex Max901e 1GHz Trunk and Bridger Amplifiers
System Return High Balancing
Carrier Level (Measuring Amp)
Measured Return High
Balancing Carrier Level
(Measuring Amplifier)
System Tilt
d. Calculate the Equalization Value. Using the appropriate table in Appendix D, select
an MEQ plug-in accessory that has a tilt as close to the Equalization Value as
possible. For a full explanation of the selection process and accessories, see Use Of
Accessory Tables on page D-1.
e. If necessary, at the Balancing Amplifier, remove the SEQ-0 from the STATION REV
EQ plug-in location and install the selected MEQ.
4. Attenuate the RF outputs:
a. At the Measuring Amplifier, measure the adjusted Return High Balancing Carrier
Level and record it as shown in the box below. Calculate the PAD Value.
Measured Return High Balancing
Carrier Level
b. Select an NPB PAD that has a flat loss within ± 0.5 dB of the PAD Value.
c. If necessary, at the Balancing Amplifier, remove the NPB-000 PAD or factory installed
jumper from the STATION REV PAD plug-in location and install the selected PAD.
d. At the Measuring Amplifier, measure both return balancing carrier levels and verify
that they are within acceptable tolerance (typically ± 1.0 dB) of the specified system
levels. If not, rebalance or troubleshoot the amplifier.
5. At the Balancing Amplifier, connect a signal level meter to the PORT 1 REV O/P TP and
measure the signal levels of both return balancing carriers. Record these levels on the
Amplifier Data Sheet.
6. Close the housing and replace the caps on all external testpoints. (Refer to Housing Closing
and Tightening on page 4-19, if necessary.)
–
System Return Low Balancing
Carrier Level (Measuring Amp)
–
Measured Return Low
Balancing Carrier Level
(Measuring Amplifier)
–
Measured Tilt
–
System Return High Balancing
Carrier Level
=
System Tilt of
Measuring Amp
=
Measured Tilt
=
Equalization
Value
=
PAD Value
1502154 Rev D