User's Manual

V H F A M P L I F I E R T E C H N I C A L M A N U A L
3
Output Level Control Detail
- The OLC will control the output level of the amplifier box, this is done by using a
sampled portion of the RF signal and converting it to DC voltage. This voltage is compared to
the preset level of the OLC circuit. The preset level is Factory set with a 2 carrier input while
monitoring IM products, not exceeding -13 dBm specification. The OLC voltage is then set to
control the output signal levels. The OLC cannot discriminate between the amount of RF
carriers or power input power levels, the OLC see’s all the power levels as a single (composite)
voltage and will add attenuation in the RF line to keep the OLC voltage from exceeding the
preset level. Controlling the output signal for 1 or more carriers in this fashion will also
maintain the IM products levels -13 dBm or below to comply with the FCC and Industry
Canada specification.