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Philips Diamond Line 2 Manual

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Diamond Line 2 Amplifier
Equipment Description ................................................................................................................................................ 31
Model Numbers (module only)............................................................................................................................... 32
Configuration Numbers (module + housing) .................................................................................................. 33
Functional Description................................................................................................................................................... 34
Forward RF Signal Flow ....................................................................................................................................................35
Before Main & Secondary Paths Split............................................................................................... 35
Main Path (after it splits from secondary path).......................................................................... 36
Secondary Path (after it splits from main path) ......................................................................... 37
Return RF Signal Flow........................................................................................................................................................38
Before the Return Legs Combine...................................................................................................... 38
After the Return Legs Combine......................................................................................................... 38
Amplifier Powering ..............................................................................................................................................................39
Controls and Connectors .......................................................................................................................................... 40
Plug-In Circuits.................................................................................................................................................................... 42
Specifications ....................................................................................................................................................................... 44
Diamond Line 2 Amplifier With 12.5 dB Tilt......................................................................................................44
Figure 8. Diamond Line 2 Amplifier, Front View ....................................................................................... 31
Figure 9. Diamond Line 2 Amplifier, Model Numbers........................................................................... 32
Figure 10. Diamond Line 2 Amp, Configuration Numbers .................................................................... 33
Figure 11. Diamond Line 2 Amp, Functional Block Diagram................................................................. 34
Figure 12. Diamond Line 2 Amp, Controls & Connectors..................................................................... 40
Figure 13. Diamond Line 2 Amp, User-Changeable Plug-Ins ................................................................ 42
Diamond Line Amplifiers
Contents
Figures
10 July 2000
29

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Summary of Contents for Philips Diamond Line 2

  • Page 1: Table Of Contents

    Specifications ..................................44 Diamond Line 2 Amplifier With 12.5 dB Tilt......................44 Figures Figure 8. Diamond Line 2 Amplifier, Front View ..................31 Figure 9. Diamond Line 2 Amplifier, Model Numbers................32 Figure 10. Diamond Line 2 Amp, Configuration Numbers ..............33 Figure 11.
  • Page 2 10 July 2000 Diamond Line Amplifiers...

  • Page 3: Equipment Description

    Equipment Description Figure 8. Diamond Line 2 Amplifier, Front View The Diamond Line 2 amplifier is a distribution amplifier, similar in function to Philips’ GNA series global network amplifiers. Diamond Line 2 amplifiers have two equal, or three unequal, high-level RF distribution outputs. They use two post-amplifier hybrids, one for the main output and one for the secondary outputs.

  • Page 4: Model Numbers (Module Only)

    8 = 870 MHz Figure 9. Diamond Line 2 Amplifier, Model Numbers The Diamond Line 2 amplifier modules vary in highest forward frequency, ALSC pilot frequency, and station output tilt. Diamond Line 2 amplifier models vary in three ways: highest forward frequency, automatic level and slope control (ALSC) pilot frequency, and station output tilt.

  • Page 5: Configuration Numbers (Module + Housing)

    G3A628D37-CVLG94C1 (variable elements underlined) specifies the following: • a Diamond Line 2 amplifier module like the example given on page 32 (highest forward frequency of 870 MHz, ALSC pilot frequency of 433.25 MHz, and 10 dB station output tilt at highest frequency) and •...

  • Page 6: Functional Description

    Functional Description Figure 11. Diamond Line 2 Amp, Functional Block Diagram The Diamond Line 2 amplifier can have two equal, or three unequal, high-level RF distribution outputs. It uses two post-amplifier hybrids, one for the main output and one for the two secondary outputs.

  • Page 7: Forward Rf Signal Flow

    Forward RF Signal Flow Before Main & Secondary Paths Split Input Port (J1). The input port, J1, routes forward incoming signal to the amplifier. (This port also routes outgoing return signal to the main cable.) Refer to Figure 11 as you Input Test Point.

  • Page 8: Main Path (After It Splits From Secondary Path)

    Forward RF Signal Flow Interstage Equalizer (factory-installed). The 7-2E-WC series (Cont.) equalizer is factory-installed to optimize the distortion characteristic of the amplifier and provide the desired main output slope at the specified bandwidth. Normally you will not change this plug-in. However, if you need to change the tilt of the amplifier’s outputs from the factory-set value, see the procedure under “Interstage &...

  • Page 9: Secondary Path (After It Splits From Main Path)

    The main output test point Main Output Test Point. The main output test point is a allows access to the return -20 dB directional coupler, which isolates the measured band as well. You can’t forward signal from the effects of reflections in the cable. measure return signal here, Accessible through a cut-out in the module cover, this test but you can inject return test...

  • Page 10: Return Rf Signal Flow

    Return RF Signal Flow Before the Return Legs Combine Return Input Port (J2, J3, or J4). A return input port routes The signal flow is the same incoming return signal to the amplifier. (This port also routes for all three of the Diamond forward outgoing signal to distribution cables.) Line 2 amplifier’s return legs.

  • Page 11: Amplifier Powering

    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.

  • Page 12: Controls And Connectors

    2. Main Output/ Return Output Jack, J1 Return Input Jack, J2 Figure 12. Diamond Line 2 Amp, Controls & Connectors This illustration shows the Diamond Line 2 amplifier module’s controls and points of connection. Callouts are defined in the following table. For locations of plug-in circuits, see page 42.
  • Page 13 Designation Description 1. Forward Input/Return Output G-type female connector. Routes forward input to the amplifier. Also Jack, J1 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.

  • Page 14: Plug-In Circuits

    Attenuator Equalizer Equalizer Attenuator Figure 13. Diamond Line 2 Amp, User-Changeable Plug-Ins These user-changeable plug-in circuits, accessible through cut-outs in the amplifier cover, let you customize the Diamond Line 2 amplifier. “WC” series equalizers and attenuators come with guides that simplify their installation and plastic covers that protect their components.
  • Page 15 The illustration to the left shows what each user-changeable plug-in looks like and where it goes in a Diamond Line 2 amplifier. For related information in this manual, see below: Other information about these plug-ins Page Which plug-ins are factory-installed, which required, which optional 43 How signal flows through the plug-ins &...

  • Page 16: Specifications

    Distortion specifications are typical for individual module performance. b. For performance using other channel spacing and loading schemes, refer to the Philips product catalog page RF-Amplifiers. 1. See the Appendix for the following specifications, which apply to all Diamond Line amplifiers: “Power Supply Specifications”...

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