Crown FM250 Manuale Utente Scaricare il pdf (Pagina 20)

Operation 3–5

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

power for the 10000 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 separately (PA1 thru PA5) in small steps (less than 300 watts 

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

ones 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 3-4 for location of these controls.

Illustration 3–4 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 3-4 for the location of these controls. To raise the power, depress 

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

power in 200 watts/second increments. Pressing once should only change the 

power 20 - 30 watts. To lower the power, depress the switch under the "Lower" 

label. Press and hold this switch to change the power in 200 watts/second 

increments. Pressing this switch once will change the power 20 - 30 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 all PA's simultaneously, reducing the need for 

separate controls for each PA.

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 37 38

Nessun commento

Crown FM250 Manuale Utente Pagina 20