4
1.3.2 TRANSMIT POWER LEVELS.
The PA has two available RF output power levels for LOS (25 and 50 W), one RF output power
level for ANW2 and SRW WB modes (25 W available only on TCR-MBA-50 WB), and five
available RF output power levels for SATCOM (10, 15, 25, 35 and 50 W, in order to comply
with MIL-STD-188-181b 2 dB RF output adjustments). These are the maximum available
power levels only, as other restrictions, including input voltage, source current limitations, and
input power levels may cause the PA to limit output power and also limit the available power
level selections. The nominal transmit power level is determined by various factors, the DC
input mode (as listed in Table 1-1), the TCR-MBA-50 power button on the amplifier front panel,
and by the optional remote control interface. The DC power source and source specific DC
cable (DC cables are wired differently depending on the end user’s DC source), will also
determine the maximum allowable current draw, which subsequently determines the maximum
allowable output power. The PWR button or the remote interface will then be able to select from
the allowable output power levels for each DC cable defined mode:
Military Battery Mode (12.5 VDC nominal):
20 Watts in LOS and WB modes, 10, 15 or 25 Watts in SATCOM and maximum
current draw not to exceed 4.75 Amps.
Commercial Vehicle Mode (13.8 VDC nominal):
25 Watts in LOS and WB modes; 10, 15 or 25 Watts in SATCOM and maximum
current draw not to exceed 5.5 Amps.
Military Vehicle Mode (28 VDC nominal):
25 or 50 Watts in LOS; 25 Watts in WB and 10, 15, 25, 35 or 50 Watts in SATCOM
and maximum current draw not to exceed 6.8 Amps.
1.3.3 POWER ON, INITITALIZATION AND MODE CHANGES.
A single pushbutton switch provides power ON/OFF control, RF output power level control and
LED intensity control. Pressing the button momentarily (<2 seconds) will cycle through the
different power levels as described in paragraph 1.3.2. Holding the button down longer than 2
seconds will dim the LEDs in 4 steps at 1 second intervals before the PA shuts down; releasing
the PWR button before the PA shuts down will set the LED intensity at one of 4 levels (high,
medium, medium low, low). The LOS and SATCOM mode buttons will cycle through the
operational modes described in Section 1.3.1. Non-volatile memory will remember the last
operational state and the PA will return to that state when power is restored.
If PIN E (auto-start) on the DC input power connector is unconnected (open) and the DC supply
is disconnected and re-connected the PA will remain in the OFF state until the PWR button is
used to turn the PA back on. After turning on, the PA will return to the last operating mode. If