User Manual

Table Of Contents

Operation RF-Orchestra!™ Transmitter Installation and Operation

5-30 6880493G02-C July 2000

Power Leveling

If the power leveling feature is enabled, the RF-O! transmitter constantly monitors the power

output of the transmitter and automatically makes ﬁne adjustments to keep the power output

at the desired level. After every 20 internal wattmeter forward power samples are taken, the

average power output for those 20 samples is calculated. If the average differs from the

desired per-subchannel power output, an adjustment is made to the power tables. Parameter

2999 (P_POWER_LEVELING_DB) is adjusted to bring the average power back to the desired

power. When this parameter is modiﬁed, the AM and FM power tables are recalculated. The

new table values are used on the next keyup sequence. The FM and AM power tables are read

by entering the RFO FIPS: a 87 0 and a 87 1 commands, respectively.

Power leveling functionality is enabled by default. To disable power leveling write parameter

997 to 0 (RFO FIPS: w 997 0). To enable power leveling, both parameters 992 (Power Control)

and 997 must be set to 1 (RFO FIPS: w 992 1 and w 997 1).

The amount of power leveling is determined by entering RFO FIPS: r 2999. The amount is also

displayed as part of the RFO FIPS: a 83 (station status) display.

A power leveling debug trace allows monitoring of the power leveling. To enable the power

leveling trace, enter the RFO FIPS: a 192 SPCQ 16 command. While the trace is active and the

station is keying, information similar to the following will be printed to the FIPS console (See

Figure 5-16).

Figure 5-16: Power Leveling Trace

To disable the power leveling trace, enter the RFO FIPS: a 193 SPCQ 16 command. For more

information on this and other debug traces see Appendix H.

RFO FIPS:

<SPCQ 16> LEVELING: Desired=100 W Actual=101 W Leveling Change=-0.04 dB Total Leveling=-0.04 dB

<SPCQ 16> LEVELING: Desired=100 W Actual=100 W Leveling Change= 0.00 dB Total Leveling=-0.04 dB