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1. General Description
Argo system A1 consist of TRF1 preamplifier and TRA1 main AGC
amplifier.The excellent per-formance of the ARGO system A1 can be attributed
to the design principles on which the construction of the amplifier is based. The
ARGO system A 1 is designed to receive, amplify and distribute broadcasted
radio and TV signals at sea. The ARGO system A 1 is based on the same
technology as the ARGO system A2000. It has the same sensitivity to weak
signals and the same ability to treat strong signals. The ARGO system A 1 is the
obvious choice for vessels that require a high quality reception of weak and
strong signals simultaneously when the ship is near land. Argo A1 is built in
compact design and easy to install. All in and output are located at the same
side. Some new features are complimented; -a input for satellite, S band area
(250 –450 Mhz). -a Video input, channel 36 (592 –598 Mhz). Argo A1 uses
one TV/FM receiving antenna and a wideband preamplifier TRF1. The TRF1
preamplifier has built in two frequency traps to prevent interference from the
Maritime VHF transmitter and NMT 450 cellular phone. TRF1 preamplifier
cover both VHF TV/FM and UHF TV frequency and has a gain from 17 to 20
dB. In the cable, which are connected between TRF1 preamplifier and TRA1
main amplifier, the preamplifier gets power and the TV/FM signal to the main
amplifier. A green LED are located beside the VHF/UHF input on the TRA1
main amplifier. This LED functions as a built in self test of the cable and
connection between the preamplifier and the main amplifier. If there is no
contact, the LED gives a strong light. If there is a short circuit, the LED don’t
give any light and if the connection is good and the preamplifier functions as it
should, the LED gives a weak light. TRA1 has a output market "TEST
output". By connecting a field meter or a TV, it is possible to check the level or
quality of the incoming signal from the TV/FM receiving antenna and the TRF1
preamplifier. TRA1 has one input for satellite, Note! Covers only S band area.
TRA1 has one input for video (VCR), Note! Only channel 36. TRA1 has one
input for AM antenna. TRA1 has built in AGC control. This keep the output
level constant. For AM at 100 dBµV, for VHF TV and FM 105 dBµV and for
UHF TV 110 dBµV. Argo A1 system is able to run up to 40 antenna outlets
directly. If the distribution network is larger, a Argo TRDA wideband distr.
Amplifier is needed.
