Crown FMX250 Manual do Utilizador descarregar pdf (Página 25)

3–6

FM4000 User’s Manual

The Transmitter Controller has the ability to internally set the maximum RF output 

power for the 4000 watt system using the power control setting for each PA. These 

controls are located behind the front panel and have an access hole in front of each 

control. A small flat blade screwdriver is needed to adjust each control. For 

maximum output level, these controls need to be set fully Clock-wise. Adjust the 

controls for each PA seperately (PA1 and PA2) in small steps (less than 100 watts 

difference) to prevent any unnecessary VSWR problems to the other amplifier (the 

one not being adjusted). These controls will effect the final RF output power that the 

remote control can adjust to. Whatever these are set for as a maximum level, that 

level is all the higher the remote control will be able to set the power to. See 

illustration 3-6 for location of these controls.

Illustration 3–6 Power Control Adjustment location

3.3.4 Raise/Lower RF Power Control

3.3.3 Transmitter RF Power Control

The Transmitter Controller has the ability to Raise or Lower the RF Power in 

small increments using the control switches on the front panel. Refer to 

illustration 3-6 for the location of these controls. To raise the power, depress 

the switch under the "Raise" lable. Press and hold this switch to change the 

power in 40 watts/second increments. Pressing once should only change the 

power 20 watts. To lower the power, depress the switch under the "Lower" 

lable. Press and hold this switch to change the power in 40 watts/second 

incriments. Pressing this switch once will change the power 20 watts. Both 

switches are momentary contact type switches and parallel the remote control 

for Raising and Lowering power via Port A on the back of the unit. A remote 

control unit is not required for this operation. These controls will change the 

RF output power on both PA's simultaneously, reducing the need for seperate 

controls for each PA.

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Crown FMX250 Manual do Utilizador Página 25