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PWR button - ON/OFF-
To turn the amplifier ON, press and hold the PWR button for more
than 1-2 seconds. The PA will turn ON and display the current power level for approximately 3
seconds. The PWR button cycles the TCR-MBA-50 (both versions) from power ON to power
OFF (LOS Bypass mode). To switch the power amplifier back to the Power OFF (Bypass mode)
press and hold the PWR button for more than 6 seconds (the LEDs will dim as the PWR button
is pressed and held down). When in the Power OFF Bypass mode the RF is automatically routed
to the LOS antenna port directly from the transceiver. The Amplifier remembers the last state it
was in when powered down.
If the auto power ON mode is selected by grounding pin E on the DC input power connector, the
power to the PA can be turned ON or OFF by turning on or off the DC supply. If the auto power
ON mode is not enabled, removing the DC power will turn the power amplifier OFF but the
PWR button must be used to turn the power amplifier back ON when external DC power is
restored.
PWR button – RF Output Power Level Select -
To select the desired RF output power level
press the PWR button momentarily (< 2 seconds). The power will increase to the next power
level from the previously set value on the first button press and will continue to the next
allowable level (mode and DC voltage level dependent refer to Table 2-2) for each subsequent
PWR button press until the desired level is reached. The LEDs for power level indication will
revert back to their normal function approximately 2 seconds after the last button press.
Note
that in some modes only a single power level is available so the power level display will not
change.
PWR button – LED Intensity Level Select-
Press and hold the PWR button for more than 2
seconds to select one of four available LED intensity levels (high, medium, medium low, low).
As the button is held down for more than 2 seconds, the LED intensity will decrease to the next
level; however, if the button is held down for more than 6 seconds the PA will shut down. To
select an LED intensity level, simply release the PWR button when the desired brightness is
displayed. If the external DC power is interrupted, the LED brightness will default to HIGH
when power is restored and the PA is turned back on using the PWR button; however, shutting
down and turning the PA back on using the PWR button will remember the last LED intensity
level.
LOS Mode
- Press the LOS mode button repeatedly to select the desired LOS mode (refer to
Table 2-1) or WB mode. When any of the LOS modes are selected, RF is routed to the LOS RF
port. Selecting a WB mode routes the RF to the WB connector (applies only to TCR-MBA-50
WB or TCR-MBA-50 with option 11000-00744 installed). Frequency hopping can be selected
by cycling through the different modes of operation using the LOS mode button as described in
Table 2-1.
SATCOM Mode
- Press the SAT mode button to select the SATCOM mode (refer to Table 2-1)
and to toggle the LNA on and off as described in Table 2-1. The SATCOM mode routes the RF
to the SAT port. The LNA provides an average 10dB receive gain for use in disadvantaged