Philips Diamond Line 2, Руководство пользователя

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Diamond Line Amplifiers 10 July 2000 39
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Return Output Attenuator. A 9-A-WC or 10-A-WC series
attenuator reduces signal levels at the return output port (J1).
Amplifiers are shipped with a “zero” return output
attenuator. You may need to select and install the appropriate
value based on the amplifier’s location in your network.
Return Output Test Point. This -20 dB directional coupler test
point is used to measure the combined return signal as it will
be sent to the return output port, J1. (Note that the test
point at J1 is for forward input only; combined return signal
cannot be measured at that point.)
Return Output Diplex Filter. See “Input Diplex Filter” on
page 35.
Return Output Port (J1). The return output port routes
outgoing return signal via the cable system back to the
previous amplifier. (This port also routes incoming forward
signal to the amplifier.)
Amplifier Powering AC power may enter the housing at any of the RF ports.
AC and RF separation is fixed. An AC bypass path provides
high impedance to RF signals.
The amplifier’s 3-ampere power supply receives the incoming
AC power and converts it into DC power. For details on the
power-director fuses, see Figure 45.