Battery Threshold; Transmitter Power - Motorola GM1200E Service Manual

1.3

Battery Threshold

The radio uses 2 battery threshold levels Tx High and Tx Low to determine the battery condition.
The Program buttons must only be activated when the power supply is set to the indicated voltage. If
the DPS detects that the voltage is not within the expected range for the threshold in question then a
message will be displayed to warn that the radio may not be set up correctly for the alignment
operation.
CAUTION:
1. From the Service menu, select Transmitter Alignment.
2. Select Battery Threshold to open the battery threshold tuning window. The current softpot
values are displayed for information only and cannot be edited.
3. Set the supply voltage to the value indicated for TX High.
4. Click the TX High Program button to store the softpot value for TX High.
5. Set the supply voltage to the value indicated for TX Low.
6. Click the TX Low Program button to store the softpot value for TX Low.
7. Close the window by clicking Cancel.
1.4

Transmitter Power

The radio has two power level settings, a high power level setting, and a low power level setting.
IMPORTANT: To set the transmitter power for customer applications use the Common Radio
Parameters window under the Edit menu and set the "Low Power Level" and "High Power Level"
powers to the desired values. Only if the transmitter components have been changed or the
transmitter does not transmit with the power set in the Common Radio Parameters window the
following procedure should be performed.
CAUTION:
The advanced power setting technology employed in the radio makes use of two reference power
level settings along with parameters describing the circuit behaviour. To determine these parameters
the DPS requires the power values measured for two different settings.
Radio Tuning Procedure
Table 4-1 Quiescent Current Alignment
RF-Band
VHF / 300-390MHz
Inadvertant use of the program buttons may result in radio failure.
When setting the
RECOMMENDED POWER SET LIMITS of 25W.
Target
UHF 440mA±10%
150mA±15%
Transmitter Power
GM1200E Tuning Procedure
DO NOT EXCEED THE
4-3