Rev F Configuration 4-11
4
7. Measure and record balancing levels and RF output for future reference:
a. Measure both forward balancing carrier levels and verify that the signal level of the
Forward High Balancing Carrier is within acceptable tolerance (typically ±0.5 dB) of
the specified system level. If the signal level is not within tolerance, rebalance or
troubleshoot the E7 Line Extender.
b. Record both forward balancing carrier levels in the ‘Internal TP (MAN)’ box of the
Forward Signal Levels table on the FlexNet® 700 Series Line Extender Data Sheet.
Record the Forward EQ and Forward Pad values on the FlexNet® 700 Series Line
Extender Data Sheet.
8. Set the level control based on the E7 Line Extender model options:
For E7 Line Extenders with TLC:
■ Set the TLC/MAN Switch to the TLC position. Record both forward balancing carrier
levels in the “Internal TP (ALC/TLC Active)” box in the Forward Signal Levels table on
the FlexNet® 700 Series Line Extender Data Sheet located in Appendix E.
For E7 Line Extenders with ALC:
a. Set the ALC/MAN switch to the ALC position. Wait 30 seconds.
b. Adjust the ALC SENSITIVITY control while observing the system high carrier on the
signal level meter (SLM). Rotate the control clockwise to decrease the signal level and
counterclockwise to increase the signal level. Stop adjusting when the output at the
high carrier reaches the Forward High Balancing Carrier Level. If Temperature
Compensation was used, balance in ALC mode for the levels calculated before
Temperature Compensation Values were determined.
c. Record both forward balancing carrier levels in the ‘Internal TP (ALC/TLC Active)’ box
in the Forward Signal Levels table on the FlexNet® 700 Series Line Extender Data Sheet
located in Appendix E.
9. Measure the signal levels of both forward balancing carriers at the Port 2 external testpoint
and record these levels in the Forward Signal Levels table on the FlexNet® 700 Series Line
Extender Data Sheet located in Appendix E.
10. If the ALC pilot carrier level was adjusted in Step 3a, it should remain at the set level if the
upper and lower adjacent channels are not active. If the adjacent channels become active
after initial balancing, decrease the ALC pilot carrier to the level initially measured in Step 3a
to ensure proper ALC tracking.
11. Close the housing and replace the caps on all external testpoints. Refer to Housing Closing
and Tightening on page 3-16, as necessary.
Note: Because the ALC SENSITIVITY control has a limit of about 20 turns, the change
in output level may not be proportional to the size of adjustment using the control.
Several complete rotations of the control may be required to observe a change in the
output level. When the control is near the operating range, small adjustments will
produce large changes in the output level. The control will click when you reach the limit
in each direction.
Note: It may take 15 minutes for the TLC output levels to stabilize after the cover is
closed.
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