Forward Balancing Procedure - C-COR Flex Max901e Equipment Manual

Forward Balancing Procedure

Refer to Figure 2.1 and Table 2.1 for control and accessory locations.
To balance the forward path
1.
2.
below 50
above 90
between 50 and 90
(10 and 32
3.
1502154 Rev D
Determine the System Forward High and Low Balancing Carrier Levels:
If bandedge carriers are used for balancing, copy the amplifier bandedge carrier
output levels from the system map to the Map Signal Information table on the
Amplifier Data Sheet.
If other than the bandedge carriers are used for balancing, calculate the balancing
carrier levels (see Calculating Balancing Carrier Levels on page 5-6 if not already
done). Record these levels in the Map Signal Information table on the Amplifier Data
Sheet.
Temperature compensate the System Forward High and Low Balancing Carrier Levels:
Temperature Need
Compensation?
° °
F (10 C)
or
° °
F (32 C)
°
F
°
C)
Note Distribution accessories are reversible. The recessed groove on the top of a
directional coupler indicates the high-loss leg. Ensure that the accessory is installed
with the correct orientation to get the required level at each port.
Set the amplifier to factory-aligned condition as follows:
a. Set the ALC/MAN switch to the MAN position.
b. Ensure that an SEQ-0 or SEQ-1G-00 is installed in the STATION FWD EQ location
and an NPB-000 is installed in the STATION FWD PAD location.
c. Ensure the ALC PAD location contains a factory-installed NPB PAD for an NTSC pilot
channel or an NPB PAD determined by the tables on page 5-15 for a QAM pilot
channel.
d. Install the interstage EQ, BRIDGER EQ/PAD, and P5/P6 FWD PAD as specified by
the system design specifications (available from the system manager).
Yes Record the current air temperature on the Amplifier Data
Sheet.
Perform temperature compensation according to
Temperature Compensation on page 5-6.
Record the compensated values in the System High and Low
Balancing Carrier Levels calculation boxes as shown in
Steps 4 and 5.
If the air temperature changes more than 20•F (11•C) while
balancing the amplifier, recalculate the temperature
compensation.
No Record the current air temperature on the Amplifier Data
Sheet.
Copy the Forward High/Low Balancing Carrier Levels from
the Map Signal Information table on the Amplifier Data Sheet
to the calculation boxes in Steps 4 and 5.
Procedure
Configuration
5
5-17