Philips Diamond Line 2, Руководство пользователя

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Diamond Line Amplifiers 10 July 2000 41
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Designation Description
1. Forward Input/Return Output
Jack, J1 G-type female connector. Routes forward input to the amplifier. Also
routes return output via the cable system back to the previous amplifier.
AC can be received through any of the four ports (J1, J2, J3, or J4) to a
3-amp power supply.
2. Main Output/
Return Input Jack, J2 G-type female connector. Routes forward output to the main cable. Also
routes return input to the amplifier. AC can be received through any of the
four ports (J1, J2, J3, or J4) to a 3-amp power supply.
3. Secondary Output/
Return Input Jacks, J3 & J4 G-type female connectors. Route forward output to distribution cables.
Also route return input to the amplifier. AC can be received through any of
the four ports (J1, J2, J3, or J4) to a 3-amp power supply.
4. Input Test Point, TP1 -20 dB directional coupler test point. Used to measure the forward input
signal at J1 without interrupting the amplifier’s operation. Return output
signal cannot be measured here.
5. Output Test Points: TP2, TP3,
TP4 -20 dB directional coupler test points. Used to measure the forward
output signals at J2, J3, and J4, respectively, without interrupting the
amplifier’s operation. Directional coupler test points isolate the measured
forward output signal from the effects of reflections in the cable. The
output test points allow access to the return band as well. You can’t
measure return signal here, but you can inject return test signals.
6. Return Input Test Points (for
ports 2, 3, & 4) -20 dB resistive test points. Used to measure the return signals before they
are combined, without interrupting the amplifier’s operation. Diamond
Line 2 amplifiers, which combine return signals from multiple legs, use
resistive return input test points to minimize noise.
7. Return Output Test Point -20 dB directional coupler test point. Used to measure the combined
return signal as it will be sent to the return output port, J1.
8. +24 VDC Test Point Used to check the DC voltage.
9. Fuses: F1, F2, F3, F4 25-amp fuses. Direct AC power to por ts J1, J2, J3, and J4, respectively.
10. ALSC On/Off Switch Switch located on ALSC circuit board. Turns automatic level and slope
control on (automatic mode) or off (manual mode).
11. ALSC Gain Control Potentiometer located on ALSC circuit board. Controls the gain set point
in automatic mode (ALSC on).
12. EMS & Power Connector Used to connect amplifier module to element-management equipment in
lid of housing (deep-lid model required).
13. Location for EMS Current
Sensor
Used with element management system to monitor the current draw in
the amplifier module.
14. Locations for Secondary Port
RF Sensors (DD-EMS Kit)
Used with element management.
15. EMS Module RF Input
Connector
Used to connect amplifier module to element-management equipment in
lid of housing (deep-lid model required).