Miteq LN Series Manuale utente

100 Davids Drive

Hauppauge, New York 11788-2034

Tel: 631 436 7400

Fax: 631 436 7431

www.miteq.com

MITEQ TECHNICAL NOTE 25T042 APRIL 2007

REV G

REDUNDANT LOW NOISE AMPLIFIER UNIT

(LN-SERIES)

_________

SECTION 1

INTRODUCTION

1.1 GENERAL DESCRIPTION

1.1.1 PHYSICAL

Figure 1-1. Front Panel Configurations

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.

The Redundant Amplifier Unit is available in a 1:1, Dual 1:1, or 1:2 configuration. The 1:1 unit

provides one on-line amplifier with one standby amplifier. The Dual 1:1 unit provides two

independent 1:1 configurations in one box. The 1:2 unit provides two on-line amplifiers with one

standby amplifier. All models are equipped with two redundant hot swappable power supplies

and a remote interface for monitoring and control via a remote computer. The design provides

for continuous operation during fault repair or routine maintenance. Among the features are a

32 entry Event Log, switch and power supply monitoring. A 100 foot cable is provided for

connection to the antenna mount amplifier/switch assembly.

1.2 EQUIPMENT CHARACTERISTICS

1.2.1 MECHANICAL

MECHANICAL

Weight (Controller).........................................................................................12 pounds nominal

Weight (Amplifier Assembly)................................ 15 to 30 pounds typical, depending on model

Overall Dimensions (Controller).............................................. 19” x 1.75” panel x 22” maximum

Primary power........................................................................................................... 90-250VAC

Primary power input.........................................................................................................IEC320

Fuse.................................................................................................................. 5x20mm (T1.0A)

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.........................................................................................Up to 95% at 30°C

Non-operating

Temperature .........................................................................................................-50 to +70°C

Atmospheric pressure................................................................................... Up to 40,000 feet

Shock and vibration ...................................................Normal handling by commercial carriers

Relative humidity.........................................................................................Up to 95% at 40°C

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. test) double wall carton. At least three inches of a solid packing material should be

used on all sides of the unit. The carton should be marked to indicate that it contains fragile

electronic equipment.

2.2 MOUNTING

THIS EQUIPMENT IS NOT FOR USE IN A DOMESTIC ENVIRONMENT.

THE CONTROLLER IS INTENDED FOR RACK MOUNTING. THE AMPLIFIER/SWITCH

ASSEMBLY IS INTENDED FOR REMOTE MOUNTING.

OPERATOR INJURY MAY OCCUR IF UNIT IS NOT PROPERLY MOUNTED.

THIS EQUIPMENT MUST BE SECURELY MOUNTED.

Slides are provided for mounting the controller in a standard 19" equipment rack.

2.3 TURN-ON PROCEDURE

After mounting, make all external connections per Table 2-1.

Apply power to the equipment by pressing the rear panel power On/Off switches.

System is now operational.

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.

Summary Alarm

Connector (J1) The Summary Alarm connector is a contact closure status output

indicating the status of the unit and also it’s power supplies. See

Paragraph 2.8 for wiring information.

Remote Interface

Connector (J2) The Remote Interface connector is an optional connection. This

allows the operator to monitor and control the equipment from a

remote location.

Interface Cable The cable is used to connect the controller and switch/amplifier

assembly together.

Table 2-1. External Connections

2.4 AMPLIFIER REPLACEMENT PROCEDURE

A replacement amplifier can have different current high and low limits, even if it is otherwise

identical to the failed amplifier. Refer to the amplifier data sheet for it’s ambient current draw,

and set the current limits to +/- 20% of that level.

See Paragraph 3.2.7 in the display operation section of this document for details regarding how

to set the current limits.

2.5 POWER SUPPLY REPLACEMENT PROCEDURE

Because of the interchangeability of PSA (Power Supply A) and PSB (Power Supply B), refer to

Section 1.1.1 for power supply positions.

• Turn off the power supply you wish to replace.

• Remove its line cord.

• Turn the black knob counter clockwise until the power supply comes loose.

• Pull the power supply by hand using the same knob as above.

• Place the new power supply in the same orientation as the old one. The power supplies in

this unit are slotted to insure proper orientation.

• Slide the power supply in by hand.

• Turn the black knob clockwise until it is hand tight.

• Attach the line cord.

• Turn on the power supply and verify proper operation.

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. From the factory, the current limits are

set at +/- 20% of the nominal current draw at ambient.

• A power supply alarm is active when a power supply exceeds +/- 8% of the nominal

voltage rating at ambient temperature. Power supply A and power supply B both have a

5.5V and a 24.5V supply; for the 5.5V source, the range is 5.0V to 6.0V, and for the

24.5V source, the range is 22.5V to 26.5V.

• A switch alarm is active if a switch is detected in a position other than what was

expected. Switch alarms are suppressed during switch operations.

Alarms are suppressed for the first second after startup to make sure that all alarm detectors

have become stable.

3.0.2 AMPLIFIER CURRENT LIMITS

Current limits vary from amplifier to amplifier. Amplifier Current Limits are set at the factory. It

is recommended that Amplifier Current Limits be changed by an operator only when an amplifier

is being replaced in the field.

3.0.3 PRIMARY AMPLIFIER

A Primary Amplifier is intended to remain On-line during normal operation. If a Primary

Amplifier fails and the backup amplifier is available, the Primary Amplifier will be switched into

Standby and the Backup Amplifier will be switched On-line in its place.

• In a 1:1 configuration Amplifier A1 is the Primary Amplifier.

• In a Dual 1:1 configuration Amplifier A1 and A3 are Primary Amplifier and Amplifier ‘C’ is

a Primary Amplifier.

• In a 1:2 configuration Amplifier A1 and Amplifier A2 are both Primary Amplifiers.

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.

• In a Dual 1:1 configuration Amplifier ‘B’ is a Backup Amplifier and Amplifier ‘D’ is a

Backup Amplifier.

• In a 1:2 configuration Amplifier ‘C’ is the Backup Amplifier.

3.0.5 ERROR TONE

A beep lasting for one second, indicating an invalid key press or a screen timeout.

3.0.6 ON-LINE

An amplifier is considered On-Line if it is switched into an input/output signal path.

3.0.7 STANDBY STATUS

An amplifier is considered in Standby if is not switched into an input/output signal path.

3.1 OPERATING MODES

The operating modes of the RLNAU are selected from the front panel (in Local mode) or over

the remote bus (in Remote mode).

3.1.1 AUTO MODE

In Auto mode the On-line/Standby status of the amplifiers is controlled automatically without

operator intervention. Amplifier path control is locked out from both the front panel and the

remote bus.

In Auto Mode, switching is the direct result of a change in amplifier alarms. Switching from

Manual to Auto Mode will cause any existing amplifier alarms to be treated as new alarms for

switching purposes.

Automatic Switching Decision Process for a Failed Amplifier

** This is only available in a 1:2 model, otherwise pass directly on to top of flowchart without switching.

Figure 3-1.

3.1.2 MANUAL MODE

When the RLNAU is in the Manual mode the On-line/Standby status of the RLNAU can be

controlled from the front panel when in unit is in the LOCAL mode. The On-line/Standby status

can be controlled over the remote bus when the unit is in the REMOTE mode. Amplifier faults

are still monitored and reported but they will have no effect on the On-line/Standby switch

status.

3.1.3 LOCAL MODE

When the RLNAU is in the LOCAL control mode operational functions and parameters can be

controlled and entered from the front panel. Remote control of those functions and parameters

is locked out. However, the control unit will still respond to remote monitoring of RLNAU

operation .

Yes

Yes Yes

Yes

Begin

Switch Backup Amplifier

On-Line

** Switch Backup Amplifier

in from low priority online

path to high priority Online

Unit in

Auto

mode

A Primary

Amplifier

has Failed

A Backup

Amplifier is

available

Any other

unit fault

have greater

priority?

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.

3.2 FRONT PANEL

The front panel has been organized so that important information is available at a glance.

Control functions and additional status information is available through a menu system and the

front panel LCD.

3.2.1 STATUS INDICATORS

Amplifier symbols have tricolor LEDs that display the status of each amplifier. Green light,

indicates normal on-line operation, amber light, indicates normal stand-by mode. The on-line or

standby amplifier LED will turn red if a fault is detected on that amplifier.

Transfer switch symbols have bicolor LEDs. Green lights display the switch transmission path,

unless there is a switch fault, then all LEDs associated with that switch will turn red.

The Power LED will light green when power is applied to the unit.

The Alarm LED will light red indicating an Active Alarm.

The Remote LED will light amber if the unit is in Remote Mode.

Manual or Auto LED’s will light up if the unit is in Manual Mode or Automatic Mode respectively

3.2.2 FRONT PANEL OPERATION

3.2.2.1 KEYPAD OPERATION

ENTER Key confirms entries. In most cases, data entry must be confirmed with an ENTER key

press. Any exceptions (e.g. Contrast) will be noted in that section.

MENU Key brings up Main Menu, or escapes out of current mode. If a change is pending

(needs confirmation), this key cancels the change without implementing it. When the unit is not

waiting on a confirmation, or the Screen has nothing that can be changed, the MENU key

displays the Main Menu.

REMOTE Key: this key chooses the Remote/Local Screen and changes the Remote/Local

Control Mode (an ENTER key press is needed to accept the selection).

MANUAL Key: this key chooses the MANUAL/AUTO Screen. and changes the Auto/Manual

Mode (an ENTER key press is needed to accept the selection).

ALARM Key: brings up the Alarm Menu, which includes a list of any Active Alarms and the

Event Log.

LEFT and RIGHT Keys: provides cursor navigation within a menu screen.

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. The LCD will display all system information and respond to all local commands available

through the front panel keypad.

3.2.2.3 BEEP OPERATIONS

A valid key press will be acknowledged with a short beep. An error tone (longer beep) will

sound with any invalid key press, parameter timeout or Display Timeout.

3.2.2.4 DISPLAY TIMEOUT

After a 50-second period without any keys being pressed, the display reverts to the default

screen and a one second beep will sound.

When the cursor is blinking, further input is required from the user. If five seconds pass without

a key press, then an error tone will sound and the blinking cursor will revert to an arrow.

3.2.2.5 CURSOR OPERATIONS

The cursor will take one of two forms: an arrow or a blinking square. The arrow cursor passively

indicates the next field to be selected; settings cannot be changed while in this form. The

blinking square cursor is present when additional keypad is expected. Without any input from

the user, the blinking square cursor will timeout and return to its arrow form.

3.2.3 MENUS AND SCREENS

3.2.3.1 DEFAULT SCREEN

If not already displayed, use the MENU key to access the default screen.

Exact Model number and description vary model to model.

The default screen displays the redundancy configuration and model number of the unit. At

start-up, the unit defaults to this screen. In addition, if another screen is active and a 50-second

time period expires without any key presses, the unit will default to this screen.

If a new alarm has been logged a message is briefly displayed on the default screen. This

message will expire after any key is pressed.

1:1 AMP SYSTEM

Questo manuale è adatto per i seguenti modelli

Indice

Altri manuali Miteq Amplificatore

Miteq

Miteq RL1-095145 Manuale utente

Manuali Amplificatore popolari di altre marche

ASTRO

ASTRO HVO V40 P Manuale utente

Marantz

Marantz SUPERSCOPE BLA-545 Istruzioni per il montaggio

NAD

NAD CI980 Manuale utente

Technics

Technics SE-CH770 Manuale utente

Harman Kardon

Harman Kardon HK6300 Manuale utente

NAD

NAD T975 Manuale utente

McIntosh

McIntosh MA6850 Manuale utente

Electro-Harmonix

Electro-Harmonix ENGLISH MUFF’N Manuale utente

Viatron

Viatron Autrix Manuale utente

GME

GME GA9800 Manuale utente

Atlas

Atlas CP700 Manuale utente

Roland

Roland KC-1000 Manuale utente

Pyle

Pyle PFMRA350BW Manuale utente

Advantage

Advantage S-250 Manuale utente

IRT Electronics

IRT Electronics DVA-3007 Manuale utente

Dimavery

Dimavery BA-100 Series Manuale utente

Sony

Sony XM-S400D Manuale utente

Schertler

Schertler ROY X Manuale utente