Ritron RIT44-465 Manual Do Utilizador
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RX SMB connector RX BPF tuning caps
TP101 RX VCO C150 TP102 4 Amp fuse
TX SMB connector
RF power adj C206
TX VCO C296 TP201 J308
6.
FACTORY ALIGNMENT
6.1
DUPLEXER
Tuning the duplexer requires either a network analyzer or an accurate RF signal generator and low level RF
detector. If the customer uses a repeater transmit frequency that is lower than the receive frequency the
coaxial cable connections are direct. That is to say, the transmit duplexer cavities are directly below the
transmitter and the receive duplexer cavities are below the receiver section. Otherwise the cables will cross
each other when connected to the RF board.
1) Disconnect power from the repeater. Disconnect SMB coaxial connectors from the RF board.
Inserting a flat screw drive between the connector parts and twisting will aid in releasing the cable.
Do not pull on the cable base as this could damage the cable. Connect SMB adapters and coaxial
cables to test instrument. If desired test equipment can go through both duplexers at once. This
will produce notches at two frequencies 5 MHz apart.
Do not pull on the cable base as this could damage the cable. Connect SMB adapters and coaxial
cables to test instrument. If desired test equipment can go through both duplexers at once. This
will produce notches at two frequencies 5 MHz apart.
2) To adjust transmit duplexer to notch receive frequency where TX frequency is below RX
frequency, set or look at response at receive frequency. Adjust screws under transmitter to
minimize response at RX frequency.
minimize response at RX frequency.