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Automatic Power Adjustment
•
NOTE: Continuous transmit periods longer than 5 minutes are to be avoided.
1. Connect the antenna output to an RF power meter or service monitor.
2. Set the PTT switch to the ON position.
3. Adjust the Variable resistor RV104 to give the appropriate transmit power. Nominally this is
25watts .
4. Set the PTT switch to the OFF position.
5. Select a channel programmed to low transmit power.
6. Set PTT to ON and adjust RV105 for desired low power .
7. Set PTT to OFF.
CTCSS/DCS Deviation Adjustment
•
NOTE: The following adjustment should be preset with factory alignment. If an adjustment
must be made the following procedures must be followed:
1. Program the radio with a 67.0Hz tone on one channel and 250.3Hz on another channel.
2. Connect a power meter and modulation meter to the radio antenna jack.
3. Adjust RV101 to the center of its adjustment.
• Note: Release the PTT button when changing channels.
4. Alternately select the channel with tone 250.3Hz and the channel with tone 67Hz . Key up and
note the level for each. If necessary, adjust RV101 until a balance occurs between tone 250.3Hz
and tone 67Hz .
•
Note:This adjustment also sets DCS balance even if a DCS tone is not programmed at this time.
5. Select tone 250.3Hz or tone 67Hz and adjust RV403 for the tone level, typically between 500Hz
to 1kHz.
6. Release the PTT button.
MAXON SM-2000 MOBILE
SM-2450/UHF ALIGNMENT PROCEDURE
Page-29-
December 98