(4) Connect the radio anrenna output to an accurate RF power meter that provides a 50-ohm load.
(5) Connect a dc voltmeter from the steering line test point (SL) to ground. Meter impedance should
be 11 megaohms or more.
(6) Key the radio and adjust coil L210 until the voltage reads 7.0 VDC
(7) Select the channel with the lowest transmit frequency. Key the radio and verify that dc voltage is
at least 2.5 VDC
(8) Select any transmit channel. (If radio has the MAB889 slaved RF power option, select any high
power transmit channel).
(9) Key the radio and adjust R453 (HI PWR) for:
Model number Power setting
MAU0 1.0 W
MAU1 6.0 W
MAU2 10.0 W
MAU3 25.0 W
(10) Switch through all channels (all high power channels for MAB889). On each channel key the
radio and note the power output.
For MAU0, MAU2 and MAU3 models note tha channel that gives tha minimum power output;
for MAU1 models note the channels that gives
The maximum power output. If more than one channels gives tha same maximum or minimum
power, chose any one of those channels.
(11) Switch through all transmiot channels (all high power channels for MAB889). On each channel,
key tha radio while watching tha dc voltage at Pin 4 of connector P6, or at test point CV on the
command board. Record the number of the channel that gives the greatest voltage and what voltage
is. (If more than one channel gives the same maximum voltage, chose any of those channels). If it
is greater than 10.0 VDC, go to step 14 if not go to step 12.
(12) On the channel that step 11 shoved to have the highest dc voltage, turn R463 fully CCW. Turn
R453 fully CW.
(13) Key the radio. Adjust the voltage limit pot R463 for a dc voltage 2.0 higher than voltage level
recorded in step 11, as measured at Pin 4 of P6 or at test point CV
(14) Set the channel selector to the chennel that was noted in step 10. Key the radio and adjust R453
for:
Model number Power setting
MAU0 1.1 W
MAU1 5.6 W
MAU2 10.7 W
MAU3 26.8 W
