3
1.3
EQUIPMENT DESCRIPTION
The TCR-U/L-25 is a bi-directional half duplex RF Power Amplifier that uses the same form
factor as the TCR-MBA-50 WB. It provides transmit amplification for 225-450 MHz, 1250-
1390 MHz and 1750-1850 MHz for ANW2 and SRW Wideband Networking operation. A low
noise amplifier provides receive gain for all three bands. The TCR-U/L-25 is suitable for
vehicular, airborne, man-portable or fixed-station applications and is compatible with most
military radios operating in the UHF and L-Band frequency spectrum for Wideband Networking
operation. The amplifier can be controlled locally via the front panel switches or from USB and
RS-232 interfaces for remote control operation. The amplifier is also set up for automatic
frequency and mode detection (user interface with front panel buttons is not necessary but is
available). The amplifier has a DC input connection; a radio RF input port and two mode specific
antenna ports. The UHF mode port is for operation from 225-450MHz. The L-BND mode port
is band limited to 1250-1390 MHz and 1750-1850 MHz.
1.3.1 USER SET MODES.
The following modes are available to the user via the front panel push buttons or with the remote
interface (and through Tx automatic mode detection):
UHF MODE BUTTON
225-450 MHz ANW2/SRW WB (Wideband Networking Waveforms) LNA ON
LNA is always on in this system and mode
L-BND MODE BUTTON
L1 ANW2/SRW WB (Wideband Networking Waveforms) LNA ON
L2 ANW2/SRW WB (Wideband Networking Waveforms) LNA ON
L3 Not used
LNA is always on in this system and in these modes
The mode button selection determines which output antenna port is active. If the UHF button is
pressed while the amplifier is in an L-band mode, the amplifier will return to the last used UHF
mode. The next UHF button press will sequence to the next available UHF mode. The same is
true for the L-BND button when pressed while in UHF mode. This way, the user may toggle
between set UHF and L-band modes by alternately pressing the two mode control buttons,
without having to cycle through the entire menu structure. Also, the amplifier is set up to
automatically detect what Tx mode it should be in when it receives an RF signal. If no buttons
are pressed, the amplifier will detect the proper mode to transmit in, and then remain in that
mode until either a button is pressed, or a frequency in a different mode is transmitted.
1.3.2 TRANSMIT POWER LEVELS.
The PA has only one output power level of 25 Watts average.