Appendix A
Application Notes
Step-by-Step Headend Setup for Forward Sweep
Forward Sweep Setup
A diplex filter is used to combine reverse signals into the rack mount unit
instead of a splitter or DC-12 because of isolation issues, and the return fiber
receiver is more than likely 5-200 MHz. This could cause jitter on the forward
sweep if not properly set up. Because the Stealth transmitter must see itself,
be careful with what is in this "loop", such as launch amps, filters, etc; it
could cause problems.
NOTE: Be sure input levels are between 4 and 12 dBmV.
The recommended is 6 dBmV ± 2. If levels are too high,
channels may be enabled that aren’t even there. Levels too
low will leave channels disabled that otherwise should be
there. The Stealth Headend Transmitter (Tx) and Multiple
User Reverse Receiver (Rx) recommended input for
reverse RF is 0 dBmV ± 2. It may work between ± 10
dBmV, but it depends on the aggregate noise floor.
FORWARD SWEEP AND BALANCE
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