5.3
CURRENT DRAIN VS SUPPLY VOLTAGE
The current drain of the module is a function of the supply voltage, the RF output in transmit and the
regulator option. The internal 7.5-volt regulator is a switching type such that the current drain actually
decreases with an increase in supply voltage. Typical current drain values are shown in the table below:
Receive Mode
Supply Voltage
Internal Regulator
Current Drain
7.5 V
No
130 mA
11.0 V
Yes
100 mA
12.5 V
Yes
90 mA
16.0 V
Yes
75 mA
Transmit Mode – 1 watt output power
Supply Voltage
Internal Regulator
Current Drain
7.5 V
No
1.2 A
11.0 V
Yes
0.9 A
12.5 V
Yes
0.7 A
16.0 V
Yes
0.5 A
Warning: Although the output power can be set as low as 1 watt, and the module is certified
as low as 1 watt, operation below 2.5 watts output power is not recommended. At low power
levels, the output power can vary by 50% or more with variations in ambient temperature.
Transmit Mode – 3 watt output power
Supply Voltage
Internal Regulator
Current Drain
7.5 V
No
1.8 A
11.0 V
Yes
1.4 A
12.5 V
Yes
1.2 A
16.0 V
Yes
0.9 A
Note: The 3-watt version of the DTX-460 operates more efficiently than the 6-watt version with
power reduced to 3 watts. Therefore, the current drain values for the 3-watt version of the DTX-
460 will be about 80% of the values shown above.
Transmit Mode – 6 watt output power
Supply Voltage
Internal Regulator
Current Drain
7.5 V
No
2.5 A
11.0 V
Yes
2.1 A
12.5 V
Yes
2.0 A
16.0 V
Yes
1.5 A
Transmit Mode – 10 watt output power (10-watt version of DTX-460 only)
Supply Voltage
Internal Regulator
Current Drain
