User's Manual

P-379 Processor

5. Select the desired output channel. Unless otherwise specified, the unit is factory

set for cable standard channel frequencies and the microprocessor automatically

selects the proper FCC offset for the output channels, requiring no calculations or

adjustments.

NOTE: For HRC output channels, see the section in this manual entitled

HRC Output Frequency Set.

During output-channel tuning, the FREQUENCY LOCK LED on the front panel

display may also blink during input-channel tuning. This is because, when the

unit is being tuned, an RF-output muting circuit is enabled to ensure that moving

RF carriers do not interfere with any existing channels on the cable system.

6. Connect a spectrum analyzer (recommended) or a field strength meter to the F-

connector marked “RF OUTPUT” on the rear panel of the P-379 agile processor.

If the unit is already connected to another device, disconnect that device from the

unit.

7. using the front panel control marked “OUTPUT LEVEL,” adjust the RF output of

the unit. The recommended output level is between +55dBmV and +60dBmV

(+115dBuV and +120dBuV).

Setting the RF output level below +55dBmV may adversely affect the parameters

of the modulating signal; setting the RF output level above +60dBmV will

adversely affect the quality of performance of the P-379. Ensure that the RF

output level is checked each time an output channel is selected, particularly

when the selected channel is a return or “T” channel or when the channel

selected is in a different band from the previous channel.

NOTE: Ensure that you do not overdrive the power amplifier. Please see

the power amplifier manual for recommended levels.