Operating and Installation Manual Barrett 4075 Linear Amplifier BCM407500/10 © Barrett Communications Head Office: Barrett Communications Pty Ltd 47 Discovery Drive, Bibra Lake, WA 6163 Australia Tel: +61 8 9434 1700 Fax: +61 8 9418 6757 Email: information@barrettcommunications.com.au www.barrettcommunications.com.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Contents Introduction............................................................................................................... 4 Terms and Abbreviations.................................................................................................... 4 Exploring the 4075 Linear Amplifier......................................................................... 5 Front Panel...............................................................
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Installation and Setup............................................................................................. 23 Safety................................................................................................................................ 23 Getting Started................................................................................................................. 23 Mains Connection..........................................
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Introduction The Barrett 4075 is a solid-state linear amplifier operating from 1.6 MHz to 30 MHz. It can be supplied with a power output level of either 500 watts or 1000 watts. Extensive self-test, system monitoring, and protection circuits are provided, with status and tuning information being displayed on a large OLED display.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Exploring the 4075 Linear Amplifier Front Panel PWR LED illuminates green when the unit is powered on.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Keypad There are seven keys on the keypad. Some keys have multiple functions assigned to them depending on when the key is pressed and for how long the key is pressed. Key functions are listed below followed by a description of their functions.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL RF Out 48 V for Amplifier Cooling fan /grill RF In 12 V Power Supply from 4022 2050 interface 4050 Breakout Box Interface Auxiliary input. Used if other equipment is far away. Alarms etc USB Interface.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Switching the Linear Amplifier On / Off Switching the Linear Amplifier On Press on. PWR to switch the unit BARRETT The Barrett splash screen displays. 4075 LINEAR AMPLIFIER After two seconds the default screen displays showing various values. Current: 1.19 A Last VSWR: 0.00 Voltage: Use the scroll keys and Freq: Band: Out PWR: ATTEN: to display more values. Press Menu.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Error States There are three types of error states that may be encountered during operation. These are: Warning The following message displays accompanied by an audible alarm and a flashing red LED. WARNING This flashing message will continue until the fault condition clears. No user intervention is required. ERROR! Error The following message displays accompanied by an audible alarm and a flashing red LED.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Display Main Menu From the Main Menu, Press either or to move the selection up or down. MAIN MENU 1 - Configuration Menu 2 - Diagnostics Menu ENT Press to select either the Configuration Menu or Diagnostics Menu. Configuration Menu From the Configuration Menu, press either or to move the selection up or down. > LINEAR CONFIG MENU 1 - Exciter 2 - ATU 3 - AUX ENT Press to select the required menu.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 1 - Exciter Use this option to select which exciter to use with the 4075 Linear Amplifier. > Exciter MENU 1 - Set 4050 2 - Set 2050 3 - Set Custom 1 Alternative custom exciters (programmable) can be used. Select Exciter from the Configuration Menu to display the following. Press or to move the selection up or down. Press ENT < Exciter MENU 4 - Set Custom 2 5 - Set Custom 3 to set the selection. 2 - ATU N/A.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 6 - Language N/A. Press ESC to return to the previous menu. 7 - Other Select Other from the Configuration Menu to display the following. > Other 1 - Buzzer Control 2 - Blocking Region Press or to move the selection up or down. ENT Press to display the selected menu. Buzzer Control This option enables or disables the audio alarms. Buzzer Control ON/OFF ON Select Buzzer Control from the Other Menu to display the following.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Blocking Region Use this option to block programmable regions. Alternatively, select none. > BLOCKING REGION MENU 1 - Region 1 2 - Region 2 3 - Region 3 Select Blocking Region from the Other Menu to display the following. Press or to move the selection up or down. Press ENT < BLOCKING REGION MENU 4 - Region 4 5 - Region 5 6 - None to set the selection. 8 - Factory Reset Use this option to revert all the values to the default.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Diagnostics Menu A passcode is required to enter the Diagnostic menu. Select the Diagnostics menu from the Main Menu to display the Passcode screen. The passcode consists of four digits. The underscore represents the selected digit. To increment or decrement the value of the selected digit, Passcode: 0000 press or respectively. To move to a different selected digit, press either or to move left or right respectively. Press code.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL From the Diagnostics Menu, press either or to move the selection up or down. > DIAGNOSTICS MENU 1 - Clear Critical Error 2 - Filter Control Menu 3 - Attenuation Control ENT Press to select the required menu.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 1 - Clear Critical Error Select Clear Critical Error, when the error raising the alarm has been fixed. This will reset the Error State. See page 9 for further information. 2 - Filter Control Menu Select Filter Control from the Diagnostics Menu to display the following. > FILTER CONTROL MENU BYPASS TOGGLE ON Filter 1 (1.60-2.48 MHz) OFF Filter 2 (2.48-3.84 MHz) OFF F:7,DUMP:RX,SYSBYPASS:RX Press or to move the selection up or down.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 3 - Attenuation Control Select Attenuation Control from the Diagnostics Menu to display the following. > ATTENUATION CONTROL MENU 1 - Set 0dB Attenuation 2 - Set 3dB Attenuation 3 - Set 6dB Attenuation ATTEN: ATTEN_6DB Press or to move the selection up or down. Select > to advance though the menu for more options, or select < to return to the previous menu. Press ting.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 4 - Power Relay Control Select Power Relay Control from the Diagnostics Menu to display the following. PS48vON/OFF: ON Enables or disables the external 48 V Power Supply. Press or to toggle the selection on or off. ENT Press to display the Confirmation screen. From the Confirmation screen, press or to toggle the selection Yes or No, and return to the previous screen.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 6 - Pallet 0 Control Select Pallet 0 Control from the Diagnostics Menu to display the following. Pal0 ON/OFF: ON The Power Amplifier consists of two pallets. Use this menu to enable or disable Pallet 0. Press or to toggle the selection on or off. ENT Press to confirm and display the Confirmation screen. From the Confirmation screen, press or to toggle the selection Yes or No, and return to the previous screen.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 7 - Pallet 1 Control Select Pallet 1 Control from the Diagnostics Menu to display the following. Pal1 ON/OFF: ON The Power Amplifier consists of two pallets. Use this menu to enable or disable Pallet 1. Press or to toggle the selection on or off. ENT Press to display the Confirmation screen. From the Confirmation screen, press or to toggle the selection Yes or No, and return to the previous screen.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 8 - Fan Control Menu Select Fan Control from the Diagnostics Menu to display the following. > FAN CONTROL MENU 1 - FAN 0 Control 2 - FAN 1 Control 3 - FAN 2 Control The Fan Control menu enables the three fans to be switched on or off independently or together. Press or to move the selection up or down. > FAN CONTROL MENU 4 - FAN 3 Control 5 - All FANS ON 6 - All FANS OFF Press or to toggle the selection on or off.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 9 - Pump Control Select Pump Control from the Configuration Menu to display the following. Pump ON/OFF ON Press or to toggle the selection on or off. ENT Press to display the Confirmation screen. From the Confirmation screen, press or to toggle the selection Yes or No, and return to the previous screen. Confirm Update? YES NO 10 - Bypass Lock On Control Select Bypass Lock On Control from the Diagnostics Menu to display the following.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Installation and Setup Safety Lethal AC and RF voltages are present within the cabinets of the Barrett 4075 solid-state Linear Amplifiers and the Barrett 4075 Power Supply Unit. The proper, safe installation of the Barrett 4075 solid-state Linear Amplifier is not difficult to accomplish if the following guidelines are followed: All electrical work should be undertaken by a suitably qualified person and in accordance with local bylaws.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL The 4075 high power transmitter systems are usually built into either the 20RU or 39RU racks. Each system includes an AC power distribution box BCA407520. Connection of mains power into this box is via a six metre long mains cable which is directly terminated into the AC power distribution box. The other end of this cable is left unterminated for hard wire connection to a customer’s mains supply through a suitable high current termination.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Ground (Earth) System The ground (earth) system is a key part of the overall system and consequently of the system performance. An inadequate ground system is the primary cause of poor system performance, noise and lightning damage. When an ATU is fitted, the system ground will include a ground counterpoise which is essential for ATU tuning performance.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL possible. It must be noted however, that the successful tuning of the ATU and the resulting VSWR performance of the antenna, will greatly depend on the effectiveness of the counterpoise provided. Marine System Grounding Metal hulled vessels provide an almost perfect ground. The tuner ground terminal should be connected directly to the hull using the shortest possible ground strap.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Antenna Connection The 4075 system can only perform well when a suitable antenna, in good condition, is installed. There are many antenna types available on the market, and so no specific antenna detail is provided in this manual. Please refer to the instruction brochures for the antenna type selected. Please note that a VSWR of < 2:1 is desirable for optimum performance of the Linear Amplifier.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 4075 System Connections The BC407500 - 1000 W Transmitter may be located in an 18RU desk mounted rack cabinet or 39RU floor mounted rack cabinet.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 4075 Connections - Rear View Internal rack cable connections are indicated in the following drawing: 9 1 12 5 2 4 10 2 6 10 5 5 9 Linear Amplifier Power Supply (48 V) 7 3 8 9 11 29
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL IEC power cable C14 to C13 1m DE15F to DE15M cable 1.2m 4075 DC power cable Coax lead PL-259M to PL-259M DC power cable Accessories DC power cable 4075 Linear to PSU control cable Coax lead N-type M to PL-259M Earth strap Earth strap DB9M to DB9F cable 2.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL System Description The 4050 Transceiver sends the transmission frequency to the Linear Amplifier which sets the appropriate low pass filter. In Standby (Receive) Mode (No PTT) In standby mode, the RF signal at the antenna bypasses the Linear Amplifier and goes straight to the Transceiver. The Transceiver’s demodulated audio is available from the external speaker fitted to the rack.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Operation Settings Factory Settings All unit settings have been factory preset for optimum performance. No internal adjustments are required. System Settings As with any system, user specific settings are required. Most user settings are made through the front panel of the 4050 Transceiver. Please refer to the 4050 HF SDR Operating and Installation Manual (P/N BCM40500) for comprehensive details of functions available.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL The antenna and feeders need to be in good condition, and where an ATU is fitted, the antenna and counterpoise must be adequate. The performance of the system relies entirely on the condition of the antenna.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 4075 - Specifications Please note these details are subject to change. General Specification Description Power Output CW 1 kW ± 1.5 dB Frequency Range 1.6 ~ 30 MHz Input Power for Rated Output 10 W Power input 10 W min ~ 100 W max, step attenuated Power Gain +25 dB Gain Flatness ±1.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Mechanical Specification Description Dimensions excluding handles and I/O connectors 178 x 482 x 480 mm (7” x 19” x 19” ) – H x W x D Rack Height 4U, 19” Rack mount Weight 30 kg (66 lbs) Cooling Liquid cooled, Water Propylene Glycol mixture Colour Black Environmental Specification Description Temperature 10°C to +50°C operational, -40°C to +85°C storage Humidity 95% relative, non-condensing Altitude 3000 m above sea level (n
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Connectors (Front) Specification Description Micro USB A/B System Interface – Status, BITE, Settings, Firmware upload Connectors (Rear) Specification Description UHF SO-239 (MIL-C-4914) RF Input Type N or 7/16 (option) RF Output D-Sub 15 2050 Legacy interface D-Sub 15 PSU Control D-Sub 9 4050 SDR Interface D-Sub 9 ATU Control D-Sub 9 Auxiliary Control D-Sub 3W3 4022 PSU Micro USB Type A/B Programming interface Optical M
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Limited 3 Year Warranty Statement Barrett Communications Pty Ltd provides a maximum three year warranty on all equipment it manufactures which is to be used expressly for high frequency, single sideband radio communications. This warranty covers faults arising from defects in design, workmanship or materials. Please note that this warranty does not cover batteries.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Warranty Registration and Technical Support Thank you for purchasing Barrett HF communications products. Please complete the warranty registration form on the next page and send it to us by mail, fax or email. Please see contact details below.
BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Warranty Registration Contact Details By Mail The registration forms can be returned by mail, (no postage stamp required in Australia) Facsimile 08 9418 6757 (International +618 9418 6757) Email support@barrettcommunications.com.au Our customer / dealer technical support department can be contacted via land mail, email, telephone or with the support department contact form on the tech support web page.
Barrett Communications Pty Ltd 47 Discovery Drive, Bibra Lake, WA 6163 Australia Tel: +61 8 9434 1700 Fax: +61 8 9418 6757 Email: information@barrettcommunications.com.au www.barrettcommunications.com.
