Installation manual

XR6/XR3 Installation Manual Commissioning tasks
Page 11-4 Issue 3.0 2009-07-15
11. Set the active preset’s power output to zero by pressing Increase and Decrease
simultaneously.
12. Press RF ON.
13. Check the output of the 48 V and 62 V power supplies.
14. Ensure that the fans are running – listen for the sound of the fans.
15. Check for alarms on the status screen.
16. With an oscilloscope, verify the RF drive frequency and duty cycle on the RF drive buffer
PWB (NAPE77) test output J5, located on the bottom, front of the transmitter.
17. Monitor the B+ voltage level using the GUI’s meters screen. Initially the B+ switching level -
displayed on the top line of the GUI - should be B+0, which should correspond to a B+
voltage between 59 and 79 V.
18. Slowly increase the power and observe the transition of the B+ switching level (through
B+1, B+2 and B+3, as applicable for your power level). The B+1 level should correspond to
a B+ voltage between 105 V and 125 V; the B+2 level should correspond to a B+ voltage
between 186 V and 206 V; the B+3 level should correspond to a B+ voltage between 305 V
and 325 V for XR6 or between 210 V and 230 V for XR3.
19. Increase the power to normal operating levels and ensure that
PA Volts remains within
specification [that is, Sqrt(Pout/ kW)*130 V = PA Volts within 15%].
20. Check the reflected power level. It should be near 0 W.
21. Set up preset power levels. See the XR6/XR3 Operating and Maintenance Guide.
22. Set up the RF monitor output. Depending on the setting of the remote interface PWB’s
BYPASS/GAIN switch, the RF monitor should be set no higher than 1 V rms (2.8 V pp;
switch set to
BYPASS) or 5 V rms (14 V pp; switch set to GAIN) at each power level, when
operating into a 50 Ω load.
Note: The transmitter’s RF output power will be momentarily inhibited when the B+
level switches.