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Paradise Datacom HPAC-100-RM Operation Manual

Solid state power amplifier
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Paradise Datacom LLC
1012 East Boal Avenue
Boalsburg, PA 16827
Drawing No.: 201081
HPAC-100/125/150/200/250-RM
Solid State Power Amplifier
Operations Manual
RA/ECO No. : 697
Phone:
(814) 466-6275
Fax:
(814) 466-3341
Email: sales@paradisedata.com
Revision: -
Date:01/10/02

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  • Page 1 HPAC-100/125/150/200/250-RM Solid State Power Amplifier Operations Manual Paradise Datacom LLC Phone: (814) 466-6275 1012 East Boal Avenue Fax: (814) 466-3341 Boalsburg, PA 16827 Email: sales@paradisedata.com Drawing No.: 201081 RA/ECO No. : 697 Revision: - Date:01/10/02...

  • Page 3: Table Of Contents

    Table of Contents Section 1 - General Information Introduction ........................1-1 Description ........................1-1 Specifications ........................1-2 Equipment Supplied ......................1-2 Safety Considerations ..................... 1-2 High Voltage Hazards ..........................1-3 High Current Hazards ..........................1-3 RF Transmission Hazards ........................1-4 Electrical Discharge Hazards .........................
  • Page 4 Table of Contents Menus ..............................3-5 Operations Menu ..........................3-6 Status Menu ............................. 3-7 Setup Menu ............................3-7 Low RF Power ........................... 3-8 High RF Power ........................... 3-8 High Temperature ........................3-8 Auxiliary Input ..........................3-8 High Reflected Power (optional) ....................3-8 Default Menu Settings ........................
  • Page 5 Table of Contents Section 4 - Theory of Operation Introduction ........................4-1 Functional Block Diagram ....................4-1 Fault Analysis ........................4-2 Section 5 - Performance Tests Introduction ........................5-1 RF Specification Tests..................... 5-1 Gain and Gain Flatness .......................... 5-1 1 dB Gain Compression Point ........................ 5-1 Input and Output Return Loss .......................
  • Page 6 Table of Contents Status Menu ............................B-6 Remote Operation ......................B-6 Parallel Port ............................B-6 Serial Port .............................. B-6 Communication Protocol ........................ B-7 Commands ............................B-7 Set Switching Mode ........................B-7 Select Standby Amp ........................B-7 Queries ............................B-7 Report System Status ....................... B-8 Responses ............................
  • Page 7 List of Figures/Tables List of Figures Figure 1-1: Outline drawing of an HPAC-100/125/150/200/250-RM......1-2 Figure 2-1: Front and rear panel view of the HPAC-100/125/150/200/250-RM... 2-2 Figure 2-2: CPR137G waveguide flange................ 2-2 Figure 3-1: Front panel of the HPAC-100/125/150/200/250-RM........3-1 Figure 3-2: Rear panel view of the HPAC-100/125/150/200/250-RM ......
  • Page 8 List of Figures/Tables Table 3-17: Calibration mode configuration..............3-16 Table 3-18: Systems options configuration..............3-16 Table 3-19: Parallel port configuration................3-16 Table 3-20: Auxiliary power rating configuration............3-16 Table 3-21: Valid M&C commands................3-19 Table 3-22: Valid M&C queries and associated responses......... 3-24 Table 3-23: Interpreting BCD format.

  • Page 9: Section 1 - General Information

    1 General Information Introduction This section provides the general information for the Paradise Datacom HPAC-100/ 125/150/200/250-RM Solid State Power Amplifier (SSPA). This includes a description of the unit and safety precautions. Description Please refer to Appendix A for the appropriate product data sheet and specifications.

  • Page 10: Specifications

    1 General Information Figure 1-1: Outline drawing of an HPAC-100/125/150/200/250-RM. Specifications Refer to the Specification sheet in appendix A for the HPAC-100/125/150/200/250-RM Solid State Power Amplifier for complete specifications. Equipment Supplied The following equipment is supplied with each unit: HPAC-100/125/150/200/250-RM Power Cord Rack Slides Rack Extensions...

  • Page 11: High Voltage Hazards

    1 General Information High Voltage Hazards High voltage for the purpose of this paragraph, is any voltage in excess of 30 volts. Voltages above this value can be hazardous and even lethal under certain circum- stances. Care should be taken when working with devices that operate at high voltage.

  • Page 12: Rf Transmission Hazards

    1 General Information RF Transmission Hazards RF transmissions at high power levels may cause eyesight damage and skin burns. Prolonged exposure to high levels of RF signals has been linked to cataracts. The following precautions should be followed with high levels of RF transmission: 1.

  • Page 13: Section 2 - Installation

    The prime power connector is a filtered IEC connector. The unit can be ordered with an internal AC supply or an optional DC power converter. The configuration is marked upon the unit. HPAC-100-RM or an HPAC-125-RM unit can operate from 110 VAC or 220 VAC, but the HPAC-150-RM, HPAC-200-RM and HPAC-250-RM should only be operated from 220 VAC.

  • Page 14: Rf Connectors

    2 Installation Figure 2-1: Front and rear panel view of the HPAC-100/125/150/200/250-RM. RF Connectors The RF Input (J1) connector, a type N female, is located in the lower right corner of the rear panel. The RF Output (J2) connector, a CPR137G waveguide flange, is located in the center of the rear panel.

  • Page 15: Input Sample Port

    2 Installation 1. Insert dowel pins in mounting holes 7 & 8 to align waveguide with the mounting surface. 2. Insert #10 screws into mounting holes 1 and 6. Hand tighten. 3. Tighten screws 1 through 6 to three inch-pounds of torque. 4.

  • Page 16: Shipment

    2 Installation Shipment To protect the HPAC-100/125/150/200/250-RM during shipment, use high quality commercial packing methods. When possible, use the original shipping container and its materials. Reliable commercial packing and shipping companies have the facilities and materials to adequately repack the instrument. Operations Manual: HPAC-100/125/150/200/250-RM SSPA...

  • Page 17: Section 3 - Operation Of Stand-Alone Unit

    3 Operation of Stand-Alone Unit Introduction This section contains operating information including a description of the front panel indicators and controls, and I/O connectors and their functions. Description of Controls, Indicators, and Connectors Front Panel Features The front panel LCD, pushbuttons, and LEDs permit the user to operate the SSPA locally.

  • Page 18: Leds

    3 Operation of Stand-Alone Unit LEDs As seen in Figure 3-1, five LEDs are located on the front panel: RF Out, Mute, On-line, Standby, and Fault. The first four are located below the LCD display while the Fault LED is above the upper right corner of the LCD. Table 3-1 indicates the meaning of their on-state.

  • Page 19: Rf Input Port (J1)

    3 Operation of Stand-Alone Unit RF Input Port (J1) The type N female connector on the right side of the rear panel is used as the RF input. RF Output Port (J2) The WR137 waveguide connector in the middle of the rear panel is used as the RF output.

  • Page 20: Rf Switch Connector (J6)

    3 Operation of Stand-Alone Unit Table 3-3: Parallel connector (37 socket D connector). t l u t l u t l u t l u t l u t l u t l u t l u t i s t i s t i n t i n...

  • Page 21: Front Panel Operation

    3 Operation of Stand-Alone Unit Table 3-4: Prime Power connector (IEC). *HPAC-150/200/250: 220-240 VAC only. Front Panel Operation The HPAC-100/125/150/200/250-RM can be controlled locally via the front panel LCD and pushbuttons. The unit must be in LOCAL mode for front panel operations as explained in the Operations Menu section.

  • Page 22: Operations Menu

    3 Operation of Stand-Alone Unit Operations Menu >Power (dBm): 45.0 ↓ RFU1: 11.0 V @ 12.3 A → − Mute: OFF ← [OPS] status setup The OPS menu is used for the basic operation of the amplifier. It provides mechanisms for local monitoring and control.

  • Page 23: Status Menu

    3 Operation of Stand-Alone Unit Status Menu P: 43.2 dBm T: 35°C ↓ Attn: 00dB Mute: OFF → − Ctrl: LOC Flt: NONE ← > ops [STATUS] setup The Status menu displays the current settings of the amplifier. It is a monitoring tool only and values cannot be set from it.

  • Page 24: Low Rf Power

    3 Operation of Stand-Alone Unit Low RF Power The Low RF Power fault alerts the user when the output power falls below the threshold value. Due to the sensitivity of the power monitor diode, do not set the threshold value more than 15 dB below the rated output power.

  • Page 25: Default Menu Settings

    3 Operation of Stand-Alone Unit Default Menu Settings The HPAC-100/125/150/200/250-RM has default menu settings when delivered. These initial settings are shown in Table 3-5. Table 3-5: Initial factory menu settings. i t i l i x When the unit is turned off, all menu settings are stored in nonvolatile memory. This permits the unit to return to the same state when power is restored.

  • Page 26: Serial Port Monitors And Controls

    3 Operation of Stand-Alone Unit Opto-Isolated Inputs: Two opto-isolated inputs are provided on the parallel connector: mute configuration and fault reset. The mute pin can have two differ- ent modes of operation depending on the internal DIP switch configuration, refer to Table 3-19 and associated text.

  • Page 27: System Configuration

    3 Operation of Stand-Alone Unit The HPA will not transmit any information over the bus unless queried to do so from the M&C system. The unit requires no handshaking on the interface, employing only Data In, Data Out, and Ground signals. The serial communication utilizes 8 data bits, 1 stop bit, and no parity.

  • Page 28: User Configurable Dip Switches

    3 Operation of Stand-Alone Unit Figure 3-5: Example of I/O card and processor card DIP switches. 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 I/O board DIP switches 1 2 3 4 5 6 7 8 OPEN (OFF)

  • Page 29: Table 3-7: Default User Configurable Dip Switch Settings

    3 Operation of Stand-Alone Unit Table 3-7: Default user configurable DIP switch settings. l e l l e l Table 3-8: System address configuration. Operations Manual: HPAC-100/125/150/200/250-RM SSPA 3-13...

  • Page 30: Table 3-9: System Baud Rate Configuration

    3 Operation of Stand-Alone Unit Table 3-9: System baud rate configuration. Table 3-10: Frequency band configuration. Table 3-11: RF module count configuration. 3-14 Operations Manual: HPAC-100/125/150/200/250-RM SSPA...

  • Page 31: Table 3-12: Power Rating Configuration

    3 Operation of Stand-Alone Unit Table 3-12: Power rating configuration. DIP switch pins 5 and 6 may be invalidated by DIP SW1 pins 6-8, see Table 3-20. Table 3-13: Redundancy configuration. Table 3-14: Unit address configuration. t i n d i l Table 3-15: Hot standby configuration.

  • Page 32: Table 3-16: Parallel Port Enable Configuration

    3 Operation of Stand-Alone Unit Table 3-16: Parallel port enable configuration. l e l l e l Table 3-17: Calibration mode configuration. Table 3-18: System options configuration. t i n & t i n Table 3-19: Parallel port configuration. When the parallel port is configured for pulse mode, pulsing the parallel mute pin low for 100 milliseconds toggles the mute state.

  • Page 33: Factory Configured Dip Switches

    3 Operation of Stand-Alone Unit Factory Configured DIP Switches Some of the DIP switches are set at the factory for the configuration of the amplifier. They should not be changed by the user . Changing these switches will result in improper operation of the amplifier. Reference the final test data sheet supplied with the unit for the correct factory settings in the event the factory configured DIP switches are inadvertently changed.

  • Page 34: Figure 3-7: Example Of Data Field Information In The Packet

    3 Operation of Stand-Alone Unit Packet Length: This field indicates the number of bytes contained in the packet. The leading frame sync bytes are not included in the count. Destination Address: The destination address field specifies the system for which the packet is intended. This field consists of one byte containing an integer address (0 to 31).

  • Page 35: Commands

    3 Operation of Stand-Alone Unit Frame Check Sequence: The checksum field is a 1 byte field that provides a parity check during packet transmission. This value is computed as a function of the contents of the packet length, destination address, source address, com- mand field, and data field.

  • Page 36: Set Configuration Mode

    3 Operation of Stand-Alone Unit The following paragraphs give detailed descriptions of each command. The item labeled length indicates the total number of bytes in the packet which includes the two frame sync bytes. Set Configuration Mode Determines which control and status messages are recognized by the unit. Type: COMMAND Pkt Length:...

  • Page 37: Set High Temperature Threshold

    3 Operation of Stand-Alone Unit Set High Temperature Threshold Sets the threshold beyond which the unit is considered to be in a state of elevated temperature. This threshold is used to determine when the unit has recoverd from an over temperature shutdown condition. This command is only recognized in setup mode.

  • Page 38: Enable Low Rf Power Fault

    3 Operation of Stand-Alone Unit Enable Low RF Power Fault Sets whether a detected low RF output power condition is considered a fault and thus contributes to a summary fault condition. This command is only recognized in setup mode. Type: COMMAND Pkt Length;...

  • Page 39: Set Reflected Rf Power Threshold (Reflected Power Monitor Option Only)

    3 Operation of Stand-Alone Unit Set Reflected RF Power Threshold (Reflected power monitor option only) Sets the threshold above which the reflected RF power is considered to be too high. This command is only recognized in setup mode. Type: COMMAND Pkt Length: Destination: SSPA System Address...

  • Page 40: Set Control Mode

    3 Operation of Stand-Alone Unit Set Control Mode Establishes the location from which the unit is controlled; local or remote. This com- mand is only recognized in operations mode. Type: COMMAND Pkt Length: Destination: SSPA System Address Source: M&C Address Command: 0x3D Data:...

  • Page 41: Report System Summary

    3 Operation of Stand-Alone Unit Report System Summary Requests the system or unit summary fault status. The system or unit responds with a terse message that provides a Go/No-Go status. Type: QUERY Pkt Length: Destination: SSPA System Address Source: M&C Address Command: 0x32 Data:...

  • Page 42: Report Unit Setups

    3 Operation of Stand-Alone Unit Report Unit Setups Requests a complete listing of a particular unit’s setup information. Type: QUERY Pkt Length: Destination: SSPA System Address Source: M&C Address Command: 0x36 Data: Unit ID: (1 byte, integer) [ 1 | 2 | 3 ] Length: 8 bytes Report Unit Software Revision Level...

  • Page 43: Interpreting Binary Coded Decimal (Bcd) Values

    3 Operation of Stand-Alone Unit Interpreting Binary Coded Decimal (BCD) values The voltages and currents within the SSPA are interpreted as floating point values. However, to transmit these values, they are encoded in BCD format. Each value is encoded into 2 bytes where each four bits will have a value in the range of [ 0..9 ]. Figure 3-8 shows how the data is transmitted and Table 3-23 is used to interpret the data.

  • Page 44: System Summary

    3 Operation of Stand-Alone Unit System Summary Response to a Report System Summary command. The Data field value indicates the general “health” of a particular unit or the entire system. Type: RESPONSE Pkt Length: Destination: M&C Address Source: SSPA System Address Command: 0x90 Data:...

  • Page 45: Unit Faults

    3 Operation of Stand-Alone Unit Unit Faults Response to a Report Unit Faults command. The Data field contains a detailed list of fault information for a particular SSPA unit. Type: RESPONSE Pkt Length: Destination: M&C Address Source: SSPA System Address Command: 0x91 Data:...

  • Page 46: Unit Status

    3 Operation of Stand-Alone Unit Unit Status Response to a Report Unit Status command. The Data field contains the status of essential operating parameters for a particular unit. Type: RESPONSE Pkt Length: Destination: M&C Address Source: SSPA System Address Command: 0x92 Data: Unit ID:...

  • Page 47: Unit Diagnostics

    3 Operation of Stand-Alone Unit Unit Diagnostics Response to a Report Unit Diagnostics command. The Data field contains a detailed list of the voltages and currents for the specified SSPA unit. Type: RESPONSE Pkt Length: Destination: M&C Address Source: SSPA System Address Command: 0x93 Data:...

  • Page 48: Unit Setups

    3 Operation of Stand-Alone Unit Unit Setups Response to a Report Unit Setups command. The Data field contains a list of the setup data for a particular unit. Type: RESPONSE Pkt Length: Destination: M&C Address Source: SSPA System Address Command: 0x94 Data: Unit ID:...

  • Page 49: Software Revision Level

    3 Operation of Stand-Alone Unit Software Revision Level Response to a Report Unit Software Revision Level command. The Data field contains an ASCII character that corresponds to the revision level for a particular unit. Type: RESPONSE Packet Length: Destination: M&C Address Source: SSPA System Address Command:...
  • Page 50 3 Operation of Stand-Alone Unit THIS PAGE INTENTIONALLY LEFT BLANK 3-34 Operations Manual: HPAC-100/125/150/200/250-RM SSPA...

  • Page 51: Figure 4-1: System Block Diagram

    4 Theory of Operation Introduction This section contains information on the theory of operation of the HPAC-100/125/ 150/200/250-RM. This includes: simple block diagrams of the system, an explanation of some of the active components, and the fault determination. Functional Block Diagram The HPAC unit is comprised of four essential areas: RF components, I/O card with Processor, Power Supplies, and the Interface Mechanisms.

  • Page 52: Figure 4-2: 2 Rf Module Block Diagram

    4 Theory of Operation Figure 4-2: 2 RF module block diagram. RF IN PREAMPLIFIER MODULE POST AMPLIFIER MODULE TEST INPUT TEST OUTPUT RF PWR - TO CONTROLLER CCA OPTIONAL REFLECTED POWER MONITOR - TO CONTROLLER CCA Figure 4-3: 3 RF module block diagram. RF IN PREAMPLIFIER MODULE TEST INPUT...

  • Page 53: Figure 4-4: Fault Monitor Points For The 2 Rf Module Unit

    4 Theory of Operation Figure 4-4: Fault monitor points for the 2 RF module unit. Current Flt Power Supplies RFU1 Temp. Flt Voltage Temp. Ambient Temp. Processor Flt. Current Flt RFU2 Temp. Flt Voltage Temp. Figure 4-5: Fault monitor points for the 3 RF module. Each amplifier module contains circuitry to monitor the operating current of the internal FETs as well as the unit temperature.
  • Page 54 4 Theory of Operation THIS PAGE INTENTIONALLY LEFT BLANK Operations Manual: HPAC-100/125/150/200/250-RM SSPA...
  • Page 55 5 Performance Tests Introduction This section describes some of the standard RF tests performed on the unit before shipment. RF Specification Tests Gain and Gain Flatness The unit gain is swept over the operating frequency range under small signal condi- tions to confirm the minimum gain and flatness specifications.

  • Page 56: Figure 5-1: Depiction Of Two Tone Third Order Imd Products

    5 Performance Tests Intermodulation Distortion The third order intermodulation distortion products are caused by nonlinearities in the system when more than one desired signal is present. Figure 5-1 depicts the two- tone third order IMD products along with the desired signals. Figure 5-1: Depiction of two tone third order IMD products.
  • Page 57 5 Performance Tests Parallel Port Monitors and Controls All parallel port monitors and controls are verified. Due to resistor and the digital to analog converter tolerances, the value of the differential power monitor at the amplifier’s rated 1dB gain compression point differs slightly between units. This value is measured and recorded on the test data sheet.
  • Page 58 5 Performance Tests THIS PAGE INTENTIONALLY LEFT BLANK Operations Manual: HPAC-100/125/150/200/250-RM SSPA...

  • Page 59: Figure 6-1: View Of The Front Panel Circuit Card

    6 Maintenance Information Introduction This section contains information on standard maintenance practices and contacting the factory. Maintenance Although no regularly scheduled maintenance is required, certain items should be routinely checked. Ensure that the amplifier is operated within the specified tem- perature range and that the fans and fan screens are free from obstructions.

  • Page 60: Figure 6-2: Removal Of Hpac-100/125/150/200/250-Rm Fans

    To reinstall a fan, follow the above directions in the reverse order. Ordering Information If questions arise over the operation or maintenance of the HPAC-100/125/150/200/ 250-RM unit and associated parts, contact Paradise Datacom at the below address, phone number, fax number, or e-mail address. Paradise Datacom LLC...
  • Page 61 6 Maintenance Information If replacement parts are necessary, identify all parts by their Paradise Datacom part number or the manufacturer’s part number. When contacting Paradise Datacom, include: a. Instrument model number b. Instrument serial number c. Description of the part d.
  • Page 62 6 Maintenance Information THIS PAGE INTENTIONALLY LEFT BLANK Operations Manual: HPAC-100/125/150/200/250-RM SSPA...
  • Page 63 Appendix A HPAC-100/125/150/200/250-RM Product Literature Operations Manual: HPAC-100/125/150/200/250-RM SSPA...
  • Page 64 Appendix A THIS PAGE INTENTIONALLY LEFT BLANK Operations Manual: HPAC-100/125/150/200/250-RM SSPA...
  • Page 65 1:1 Redundant System flexible solution available for satellite earth station • 1:2 Redundant System uplink. • DC Operation Paradise Datacom LLC www.paradise.co.uk Paradise Datacom Ltd 1012 East Boal Avenue 1 Wheaton Road, Witham Boalsburg, PA 16827 Essex, CM8 3TD United Kingdom...
  • Page 66 C-Band SSPA; Rack Mount Model: HPAC-100, 125, 150, 200 & 250-RM PARAMETER NOTES LIMITS UNITS Electrical Frequency Range 5.850 to 6.425 Output Power @ 1dB Gain HPAC-100A-RM 49.8 (min.) Compression (P HPAC-125A-RM 50.6 (min.) HPAC-150A-RM 51.5 (min.) HPAC-200A-RM 52.5 (min.) HPAC-250A-RM 53.8 (min.) Output Power @ Saturation...
  • Page 67 C-Band SSPA; Rack Mount Model: HPAC-100, 125, 150, 200 & 250-RM PARAMETER NOTES LIMITS UNITS Electrical Frequency Range 5.850 to 6.725 Output Power @ 1dB Gain HPAC-100AX-RM 49.5 (min.) Compression (P HPAC-125AX-RM 50.3 (min.) HPAC-150AX-RM 51.2 (min.) HPAC-200AX-RM 52.2 (min.) Output Power @ Saturation HPAC-100AX-RM 50.0 (min.)
  • Page 68 C-Band SSPA; Rack Mount Model: HPAC-100, 125, 150, 200 & 250-RM HPAC 100-250.doc 10/10/01...
  • Page 69 C-Band SSPA; Rack Mount Model: HPAC-100, 125, 150, 200 & 250-RM J2: RF Output, Product Identification Label: WR 137 Waveguide Contains Equipment Model Number, With CPR137G Flange Equipment Serial Number, Manufacturer Information J7: AC Line Entrance, J1: RF Input, J6: RF Switch, Provides IEC Socket Type N female power to...
  • Page 71 Appendix B Operation of a 1:1 Redundant HPAC-100/125/150/200/250- Introduction Two HPAC-100/125/150/200/250-RM units can be connected in a one for one (1:1) redundant configuration. This configuration automatically switches in an operating amplifier if the on-line amplifier develops a system fault. Because each amplifier contains a microprocessor, an additional controller is not required.

  • Page 72: Figure B-1: Outline Of The 1:1 Redundant Hpac-100/125/150/200/250-Rm Rack Mounted System

    Appendix B Figure B-1: Outline of the 1:1 redundant HPAC-100/125/150/200/250-RM rack mounted system. Hardware HPAC-100/125/150/200/250-RM units Two HPAC-100/125/150/200/250-RM units are used for a 1:1 redundant configuration. They communicate with each other through the interface cable passing system control- ler information, serial information, and fault information. The units distinguish them- selves by their factory set local addresses.

  • Page 73: Table B-1: Switch Connector Pin Out

    Appendix B Table B-1: Switch connector pin out. t i s t i s Interface Connector The 15 socket D interface connector allows the two amplifiers to communicate with each other. This cable should not be removed during operation! The system will not operate properly.

  • Page 74: Figure B-2: Rear View Of The 1:1 Redundant Hpac-100/125/150/200/250-Rm Rack Mounted System

    Appendix B Figure B-2: Rear view of the 1:1 redundant HPAC-100/125/150/200/250-RM rack mounted system. Operations Manual: HPAC-100/125/150/200/250-RM SSPA...
  • Page 75 Appendix B Attach the 15 pin interface cable to the interface ports on each amplifier. Attach the switch control cable to the amplifiers and the switches. Ensure that the A1 labeled connector connects to amplifier 1, the A2 labeled connector connects to amplifier 2. DIP Switch Selections The user configurable DIP switches have the same functions as for a stand-alone unit.

  • Page 76: Figure B-3: Status Menu For A Redundant System

    Appendix B Manual mode, this control provides the means for switching the system configuration. Mute Status The front panel mute LED on each unit indicates the mute status of the individual ampli- fier. Line three of the OPS menu has two provisions for muting. System mute/unmute controls both amplifiers simultaneously.
  • Page 77 Appendix B Communication Protocol A user’s M&C system can only communicate with a redundant system via an RS-485 interface. Commands The commands associated with a stand-alone unit are valid with the following addi- tions. The response to each new command is ACK or NAK. Set Switching Mode Determines whether the RF switching occurs automatically or manually when a summary fault is registered.
  • Page 78 Appendix B For a standalone unit, Unit ID = 1 or 2, the “Go” status indicates that the amplifier is not faulted. The “No Go” status indicates that the amplifier is faulted. This is the same value as Unit Summary Fault in the Unit Status Response. Report System Status Requests a list of information pertaining to the system of SSPAs.
  • Page 79 Appendix B System Status Response to the Report System Status command. Contains data pertaining to the redundant system status. Type: RESPONSE Pkt Length: Destination: M&C Address Source: SSPA System Address Command: 0x95 Data: Unit ID: (1 byte, integer) Switching Mode (1 byte, integer) 0 = Manual 1 = Auto...
  • Page 80 Appendix B THIS PAGE INTENTIONALLY LEFT BLANK B-10 Operations Manual: HPAC-100/125/150/200/250-RM SSPA...

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