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higher this voltage is. If this display reaches 12V or 0V, the PLL will not lock.
If the Locked indicator says it is not locked, no RF power is generated. This prevents in-
terfering with other stations while adjusting the PX50's frequency. Power is automati-
cally set to 0 Watts while adjusting, and then brought back up to the power setting
slowly once the frequency is set.
5.10 Set RF Output Power Display
This menu is used to adjust the PX50's RF output
power within the 0-50W range, in 1 W step sizes.
Note that your Effective Radiated Power (ERP) is a
function of your transmitter—antenna—feed line combination. The power display is cali-
brated based on the measured forward and reflected power at the RF output connector.
Use the Left/Right arrow keys to adjust the power setting. They can either be pressed
once to change by 1 Watt steps, or they can be held down to change the power setting
at a faster rate. The amplifier will track and lock to that power setting as shown on the
second line of the display. The PX50 will periodically compare this power setting with
the measured output power, and make adjustments to maintain power over a variety of
conditions such as reduction in supply voltage, temperature changes, or antenna
changes.
5.11 Set Stereo Mode Display
This menu selects either stereo or mono broadcast
modes. In mono mode the stereo modulator is
completely shut down and the carrier is removed.
This allows you to transmit a bit further with better sound. Most users will never use
this mode other than for troubleshooting purposes. Controls must be in an unlocked
condition to allow you to change this setting. Use the left and right keys to toggle this
value.
5.12 Set Station ID Display
Use the right arrow key or Enter to begin editing
the fields and the navigation keys to cycle positions
and characters. All characters will be in upper case.
A maximum of 6 characters may be used. You can use all of the keys to adjust these
values. This is simply designed to let you identify your unit in the event that you have
more than one in a building.
5.13 Set Auto Power
This menu contains the two power Auto modes,
which can be on or off. The top line indicates
whether the auto power leveling is on or off. This
is the feature that maintains the set power level by periodically checking the output
level. If disabled, power adjustments will not be made. Toggle this by using the Left
Arrow Key. Default = ON.
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