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Miteq LN Series Manual

Redundant low noise amplifier unit
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MITEQ TECHNICAL NOTE 25T042
REDUNDANT LOW NOISE AMPLIFIER UNIT
1.1 GENERAL DESCRIPTION
1.1.1 PHYSICAL
(LN-SERIES)
_________
SECTION 1
INTRODUCTION
Figure 1-1. Front Panel Configurations
1 0 0 D a v i d s D r i v e
H a u p p a u g e , N e w Y o r k 1 1 7 8 8 - 2 0 3 4
T e l : 6 3 1 4 3 6 7 4 0 0
F a x : 6 3 1 4 3 6 7 4 3 1
www. m i t e q . c o m
APRIL 2007
REV G

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  • Page 1 T e l : 6 3 1 4 3 6 7 4 0 0 F a x : 6 3 1 4 3 6 7 4 3 1 www. m i t e q . c o m MITEQ TECHNICAL NOTE 25T042 APRIL 2007 REV G...
  • Page 2 Figure 1-2. Rear Panel Configurations 1.1.2 FUNCTIONAL The redundant Low Noise Amplifier (LNA) unit is used to provide automatic signal protection in a redundant low noise amplifier system. There are two operating modes, Manual and Auto. In Manual mode the operator has control of the transfer switches. With the control unit in Auto mode, a fault condition in an on-line LNA would generate an automatic switchover to a standby LNA.
  • Page 3 Remote interface connectors (J2, J3) RS422/RS485 (Standard) ....................DE-9S RS232 (Option 17C) ....................DB-25P Contact Closure ......................DC-37S IEEE-488....................IEEE-488 receptacle 1.2.2 ENVIRONMENTAL Operating Ambient temperature (Controller) ................0 to +50°C Ambient temperature (Amplifier/Switch Assembly) ..........-30 to +60°C Atmospheric pressure ................... Up to 10,000 feet Relative humidity..................

  • Page 4: Turn-On Procedure

    SECTION 2 2.0 INSTALLATION 2.1 UNPACKING, STORAGE, RESHIPMENT Carefully open the shipping container and remove the equipment. Inspect the equipment thoroughly and report any damage. If the equipment is to be stored, it should be wrapped in plastic and kept in a clean, dry place. If the equipment is to be reshipped for any reason, wrap in heavy plastic and ship in a heavy (275 lb.

  • Page 5: Power Supply Replacement Procedure

    DESIGNATION DESCRIPTION Ground Lug Connect the ground lug on the rear panel of the equipment to the Protective Earth connection of the building. Power Cords Attach power cords to the rear panel AC power inlets marked “PSA” and “PSB”. Connect the other end to the power source. Refer to national wiring standards for the correct connection to the power source.

  • Page 6: Active Alarm

    SECTION 3 3.0 DEFINITIONS 3.0.1 ACTIVE ALARM An Active Alarm is a Redundant Low Noise Amplifier Unit (RLNAU) generated fault, which indicates that the unit is presently detecting a fault. The Active Alarms that can be reported are: • An amplifier alarm is active while the current drawn by the amplifier exceeds the current limits programmed into the unit for that amplifier.
  • Page 7 3.0.4 BACKUP AMPLIFIER A Backup Amplifier is intended to remain in standby during normal operation. In the event of a primary amplifier fault the Backup Amplifier will be switched On-line and the primary amplifier is switched into standby. • In a 1:1 configuration Amplifier ‘B’ is the Backup Amplifier. •...

  • Page 8: Manual Mode

    Automatic Switching Decision Process for a Failed Amplifier Begin Unit in Auto mode A Primary A Backup Amplifier Amplifier is has Failed available Switch Backup Amplifier Any other On-Line unit fault have greater priority? ** Switch Backup Amplifier in from low priority online path to high priority Online ** This is only available in a 1:2 model, otherwise pass directly on to top of flowchart without switching.

  • Page 9: Remote Mode

    3.1.4 REMOTE MODE When the RLNAU is in the Remote control mode operational functions and parameters can only be controlled from the remote bus. All control and parameter values can be viewed from the front panel. Changes to control and parameter values are locked out. The event log and any active alarms can be examined while the unit is in the Remote control.

  • Page 10: Liquid Crystal Display

    UP and DOWN Keys: provides navigation to different menu screens, when the cursor is a right arrow the ↑↓ keys cycle through parameter choices. 3.2.2.2 LIQUID CRYSTAL DISPLAY The Liquid Crystal Display (LCD) is organized as two rows consisting of sixteen characters each.
  • Page 11 3.2.3.2 MAIN MENU If not already displayed, use the MENU key to access the Main Menu. The Main Menu is a series of screens that provide access to functions that do not have a dedicated key. Use the up and down arrow keys to scroll through the Main Menu screens in the order listed below.
  • Page 12 3.2.3.3 ON-LINE/STANDBY SCREEN Use the MENU and arrow keys to select the ON-LINE/STANDBY screen, then press ENTER. To Change On-line/Standby Status: • Point the arrow cursor to the desired amplifier status. The UP and DOWN keys move the arrow cursor. If that amplifier is not on the display (for the 1:2 and Dual 1:1 models only), the other amplifier(s) may be reached by using the DOWN key.
  • Page 13 3.2.3.5 VOLTAGE MONITOR SCREEN Use the MENU and arrow keys to select the VOLTAGE MONITOR screen, then press ENTER. Slight variation should be expected. PSA:+5.6V +24.5V This screen updates to provide the latest readings from the voltage monitors of the power supplies.
  • Page 14 3.2.3.7 REMOTE FORMAT SCREEN Use the MENU and arrow keys to select the REMOTE FORMAT screen, then press ENTER. BUS:232 ADDR:64 BAUD:9600 BUS: RS232 ADDR:64 REMOTE FORMAT screen varies with remote type: IEEE-488 RS422/RS485 BUS: IEEE-488 BUS:4XX ADDR:64 ADDR:XX BAUD:9600 These menus are not available to models equipped with the Contact Closure option as the remote bus interface.
  • Page 15 Change Parity: (P) (RS232, RS422 and RS485 Options Only) • Use LEFT, RIGHT, UP, and DOWN keys to navigate the cursor to the “:” after “P”. • While the cursor is blinking, the UP and DOWN keys can be used to change the parity to Odd (O), Even (E), or None (N).

  • Page 16: Subnet Mask

    ↑ SUBNET MASK: Subnet Mask To change the Subnet Mask: • Press the up or down arrow key until the Subnet Mask screen is displayed. • Press the right or left arrow keys to highlight an octet of the Subnet Mask. •...

  • Page 17: Date/Time Screen

    3.2.3.10 PRIORITY SCREEN (1:2 Configuration Only) Use the MENU and arrow keys to select the Priority screen, then press ENTER. PRIORITY- AMPLIFIER: A1 This section is only available to 1:2 models. Change Priority: • Press UP and DOWN keys scroll through the selections: A1, A2, and NONE. •...

  • Page 18: Alarm Menu

    3.2.3.12 ALARM MENU Press the ALARM key to display the Alarm Menu. 02 ALARMS 32 EVENTS The Alarm Menu displays the number of active alarms and the number of events stored in the Event Log. The Alarm Menu also provides access to the Active Alarm screen and the Event Log screen.
  • Page 19 • To view the time the event was logged, use the LEFT and RIGHT keys to point the arrow cursor to “TIME”, press the ENTER key, and the display will read: DATE: 1/01/00 To go back to the related event, press the MENU key (to escape) or wait five seconds. •...

  • Page 20: Remote Operations

    SECTION 4 REMOTE OPERATIONS The equipment is supplied with an RS485/RS422 bus. As an option, the equipment can be supplied with an IEEE-488, RS232, contact closure or Ethernet interface instead of the RS485/RS422. The command structures for the serial buses and Telnet are identical. The IEEE-488 message format is similar to the serial message format.

  • Page 21: Serial Message Format

    4.2 SERIAL MESSAGE FORMAT The serial message format is as follows: HEADER - ADDRESS - COMMAND/ERROR CODE - PARAMETERS - TRAILER - CHECKSUM The Header byte is 7BH, ASCII character "{". The address may take on the values from 64 to 95 decimal (40H to 5FH). Legacy Redundant Amplifier commands are fully supported in this unit.

  • Page 22: Remote Command Set

    4.3 COMMAND AND ERROR CODE SUMMARY LEGACY COMMAND SET ASCII Character String Function On-line/Standby Status Alarm Status Mode On-line/Standby Status Mode REMOTE COMMAND SET ASCII Character String Function Alarm Status Combined Real Time Clock Amplifier Current Limits Log Entries Mode (cmd same as U query same as R) Amplifier Priority (1:2 unit only) On-line/Standby Status (cmd same as P query same as S) Voltage and Current Readings...
  • Page 23 QUERY ALARM STATUS Query Command: Q Unit Response: Qabc (For 1:1 & 1:2 Systems) Unit Response: Qabcde (For Dual 1:1 Systems) a = A1, Amplifier 1 (0 = Normal, 1 = Fault) b = A2, Amplifier 2 (0 = Normal, 1 = Fault) c = A3, Amplifier 3 (0 = Normal, 1 = Fault) d = A4, Amplifier 4 (0 = Normal, 1 = Fault) e = Any Switch Alarm or Any Power Supply Alarm (0 = Normal, 1 = Fault)
  • Page 24 4.3.3 AMPLIFIER CURRENT LIMITS = LIM The SET command requires three parameters. One is a single digit in length representing the amplifier path. The other two are both three characters in length representing the high and low amplifier current limits in milliamps. Remote Command Sequence: $LIMaLlllHhhh Response: $LIM = A1 or A2 (1or 2 respectively)

  • Page 25: Logged Events

    LOGGED EVENTS Event Event Code Event Code Event Startup Switch3 Fault Current Limit Change Switch4 Fault 1:2 Priority Change A1 Fault Recovery Man/Auto Mode Change A2 Fault Recovery A1 On-Line A3 Fault Recovery A2 On-Line A4 Fault Recovery A3 On-Line Switch1 Fault Recovery A4 On-Line Switch2 Fault Recovery...
  • Page 26 4.3.6 AMPLIFIER PRIORITY = PRI The SET command requires one parameter a single digit in length representing the amplifier path which will have the higher priority. Remote Command Sequence: $PRIa Unit Response: $PRI a = 1 = A1 a = 2 = A2 The QUERY command requires no parameters.
  • Page 27 The QUERY command requires no parameters. Remote Command Sequence: ?SWT or S Response: SWTa(b) or Sa(b) Remote Command Sequence: S Response: Sa(b) 1:1: a = 0 = A1 On-line, A2 Standby a = 1 = A2 On-line, A1 Standby Dual 1:1: a = 1 = A1 On-line, A2 Standby a = 2 = A2 On-line, A1 Standby b = 3 = A3 On-line, A4 Standby b = 4 = A4 On-line, A3 Standby...

  • Page 28: Message Protocol

    4.5 IEEE-488 MESSAGE PROTOCOL The equipment performs the basic Talker and Listener functions as specified in the IEEE-488 standard. It is also capable of sending a Service Request to the active IEEE-488 Controller and will respond with a status word when the Serial Poll Enable message is received. The messages to and from the unit are ASCII character strings terminated with CR, LF and EOI.

  • Page 29: Service Request

    R = Mode Indicator f = 0 Remote f = 1 Local g = 0 Manual g = 1 Auto S = On-line/Standby Status Indicator 1:1: h = 0 A1 On-line, A2 Standby h = 1 A2 On-line, A1 Standby Dual 1:1: h = 1 A1 On-line, A2 Standby h = 2 A2 On-line, A1 Standby h = 3 A3 On-line, A4 Standby...
  • Page 30 4.7 RS485 BUS TERMINATION A jumper selectable 120 ohm termination resistor is connected across the DATA +/DATA - terminals. Installing E1 places the resistor across the terminals. 4.8 REMOTE INTERFACE CONNECTORS Summary Alarm Connector, J1, pin designations are indicated in the table below. SUMMARY ALARM OUTPUTS (J1) DESCRIPTION PINS...

  • Page 31: Description (Commands)

    Dual 1:1 Status Output Connector (Contact Closure Option Only), J2, pin designations are indicated in the table below. DUAL 1:1 STATUS OUTPUTS (Contact Closure) (J2) DESCRIPTION (COMMANDS) CLOSED COMMON OPEN A1 On-line, A2 Standby A2 On-line, A1 Standby A3 On-line, A4 Standby A4 On-line, A3 Standby Auto Manual...
  • Page 32 1:2 Status Output Connector (Contact Closure Option Only), J2, pin designations are indicated in the table below. 1:2 STATUS OUTPUTS (Contact Closure) (J2) DESCRIPTION (COMMANDS) CLOSED COMMON OPEN A1 and A2 On-line, A3 Standby A2 and A3 On-line, A1 Standby A1 and A3 On-line, A2 Standby Auto Manual...
  • Page 33 Remote Interface Connector, J2, pin designations are indicated in the tables below. RS232 (J2) DESIGNATION Rx Data Tx Data Ground RS485 AND RS422 (J2 and J3) Ground Data Out - Data In - Data Out + Data In + IEEE-488 (J2) Commands (BCD) 1 LSB 20 MSB...

  • Page 34: Ethernet Interface

    SECTION 5 ETHERNET OPERATIONS 5.0 ETHERNET INTERFACE The Control Unit is equipped with an Ethernet Interface feature permitting control and monitoring via a 10 or 100 Mbps Ethernet connection. Available interface protocols are HTTP (web access), SNMP (Simple Network Management Protocol), and Telnet. The use of standard protocols makes it possible to provide (password-protected) access to the Control Unit from any location in the world where an internet connection is available 5.1 INSTALLATION...
  • Page 35 5.1.3 CONFIGURING INTERNET PROTOCOL (IP) OPERATING PARAMETERS An Internet Protocol (IP) address and associated parameters must be configured in the unit so the controlling device can address it. Normally, the individual or organization managing the facility’s LAN assigns this address. Three parameters will be required: IP Address (Factory setting 192.168.1.1) Subnet Mask (Factory setting 255.255.255.0)
  • Page 36 (screen locked) pull-down to UNLOCKED, and press the Submit or other applicable button. FIGURE 5-1. LOGIN SCREEN Once logged in the home page will appear. At the top of each page the MITEQ logo along with the model number of the unit is displayed.

  • Page 37: Home Screen

    (HEADER - ALL PAGES) Function Name Description Mode Select between Auto and Manual Redundancy Modes Remote Show the current Control Mode Amplifier Fault Show Amplifier Fault Status Switch Fault Show Switch Fault Status Power Supply Fault Show Power Supply Fault Status FIGURE 5-2.

  • Page 38: Communications Page

    FIGURE 5-3. COMMS SCREEN COMMUNICATIONS PAGE Function Name Description IP Address View or set the system IP address (changing this value will reset the system) IP Subnet Mask View or set the system IP Subnet Mask (changing this value will reset the system) IP Gateway View or set the system IP Gateway (changing this value will reset the system)
  • Page 39 The Communications provides access to the communication settings of the unit. Changing the IP settings will disrupt the session and the operator will be required to reconnect to the unit at the new settings. These can be set from the remote port. SNMP parameters can also be defined from this page.

  • Page 40: Miscellaneous Page

    FIGURE 5-5. MISCELLANEOUS SETTINGS PAGE MISCELLANEOUS PAGE Function Name Description Enable Telnet Permit or prevent Telnet access Enable Re-Flash Permit or prevent remote upgrade of the converter firmware. Send a Test Trap Check this box and press Submit to send a single SNMP test trap Un-lock All Pages Disables the screen locked function at each page...
  • Page 41 FIGURE 5-6. EVENT LOG SCREEN The log page allows the user to review the events stored in the event log. The event log can be cleared by unlocking the screen and pressing the clear log button. LOG PAGE Function Name Description Log Listing View a listing of all system log entries...
  • Page 42 FIGURE 5-7. LOGOUT SCREEN Pressing the Logout button will end the session and the page shown above will appear on the browser screen.
  • Page 43 5.3 ACCESS VIA SNMP The unit may be accessed and monitored via the Simple Network Management Protocol (SNMP). SNMP is designed for control of network elements from a central management point. 5.3.1 SNMP OID STRUCTURE GENERAL SECTION – PRESENT IN ALL PRODUCTS Get/Set Access Description...
  • Page 44 71517.1.16 The SNMP Management Information Base (MIB) file for the system, available from MITEQ defines the specifics of the interface. This file is read by the chosen SNMP management tool to provide an “understanding” of the interface. The MIB file is in a format that can be read with any text editor.

  • Page 45: Access Via Telnet

    When a Telnet connection is established, the unit will request the password (five ASCII characters), which should be sent in the standard MITEQ wrapper (‘{‘<address byte (ignored)><password>’}’<checksum byte>(ignored)). The default password is five numeral ones.
  • Page 46 Figure 5-9. Telnet Communication Once the connection is established, standard serial commands may be sent and responses will be received. Logout is automatic when the Telnet connection is broken. To re-establish the connection the password will have to be sent to the unit again. 25T042.DOC...

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