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Harris Micromax Operation Manual

30 watt solid-state fm exciter
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Operation Manual
Micromax
30 Watt Solid-State
FM Exciter

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Summary of Contents for Harris Micromax

  • Page 1 Operation Manual Micromax 30 Watt Solid-State FM Exciter...
  • Page 2 Harris Micromax FM Exciter REV 1 01/12/2007 WARNING: Disconnect primary power prior to servicing...
  • Page 3 Use appropriate grounding procedures to short out capacitors and high voltage points before servicing. Harris Corporation reserves the right to modify the design and/or the technical specifications of the product and this manual without notice. WARNING: Disconnect primary power prior to servicing...
  • Page 4 Harris Micromax FM Exciter REV 1 01/12/2007 First Aid The personnel employed in the installation, use and maintenance of the device, shall be familiar with theory and practice of first aid.. Treatment of electrical shocks 2.1.1 If the victim is not responsive Follow the A-B-C's of basic life support •...
  • Page 5 Harris Micromax FM Exciter REV 1 01/12/2007 2.1.2 If victim is responsive Keep them warm • • Keep them as quiet as possible Loosen their clothing (a reclining position is recommended) • Call for medical help as soon as possible •...
  • Page 6 Harris Micromax FM Exciter REV 1 01/12/2007 WARNING: Disconnect primary power prior to servicing...

  • Page 7: Table Of Contents

    Harris Micromax FM Exciter REV 1 01/12/2007 TABLE OF CONTENTS Page SECTION 1 General Description Introduction Equipment function Physical description Electrical description Simplified block diagrams List of subsystems SECTION 2 Installation Introduction Unpacking Returns and exchanges Installation 2.4.1 A/C power connection 2.4.2...
  • Page 8 Harris Micromax FM Exciter REV 1 01/12/2007 WARNING: Disconnect primary power prior to servicing...

  • Page 9: Introduction

    Harris Micromax FM Exciter Installation REV1 01/12/2007 SECTION 2 Installation Introduction This section contains information on how to install the exciter and covers the following topics: • Unpacking (2.2) • Returns and Exchanges (2.3) • Installation (2.4) • A/C power connection (2.4.1) •...
  • Page 10 (REAR PANEL VIEW) Connect RF Output to antenna here 2.4.3 Audio input connections All program audio connections are on the rear panel. Micromax is designed to accept any one of the three types of program audio inputs: (1) MPX (composite) (2) Mono...
  • Page 11 Harris Micromax FM Exciter Installation REV1 01/12/2007 2.4.3.1 MPX (composite) audio input connection Connect MPX (composite) audio input to BNC connector on rear panel. On the front panel LCD display, go to SET menu and select mono (composite) from the audio mono/stereo selection (see section 3 of manual on how to navigate the LCD display).
  • Page 12 Harris Micromax FM Exciter Installation REV1 01/12/2007 2.4.3.3 Left and right channel audio inputs (using the built-in stereo generator) Connect left and right channel audio inputs to XLR connectors on rear panel. On the front panel LCD display, go to SET menu and select stereo from the audio mono/stereo selection (see section 3 of manual on how to navigate the LCD display).
  • Page 13 Harris Micromax FM Exciter Installation REV1 01/12/2007 2.4.4 Remote I/O connector (using provided DB15 interface jumper) Remote control and monitoring of the transmitter is available through a DB15 connector on the rear panel. Following describes the function of each pin on the remote I/O connector using the provided DB15 interface jumper.
  • Page 14 Harris Micromax FM Exciter Installation REV1 01/12/2007 2.4.5 Service connector Service connector is used to interface with a computer RS232 port. It can also be used to remotely set operating frequency and RF power level of the exciter (see attachment 1 on page 3-7).

  • Page 15: Equipment Function

    • Technical and Mechanical Specifications (Tables 1.1) Equipment function The Harris Micromax is a 30 Watt FM exciter designed to operate in the 88-108 MHz range in 10 kHz steps. The RF power is adjustable continuously from 0-100% of rated power. It is designed to handle MPX (composite), mono and left/right audio inputs with the built-in stereo generator.

  • Page 16: Electrical Description

    REV1 01/12/2007 Electrical description Micromax is a self contained broadband FM exciter. The frequency of operation and RF power level are selectable from the front panel. A microprocessor controller monitors all operating parameters and automatically lowers RF output in case of high VSWR or temperature.
  • Page 17 Harris Micromax FM Exciter System Overview REV1 01/12/2007 FIGURE 1-1 Front and Rear Views WARNING: Disconnect primary power prior to servicing...
  • Page 18 Harris Micromax FM Exciter System Overview REV1 01/12/2007 TABLE 1-1 Technical Specifications Panel size 483 mm (19”) x 44 mm (1.75”) (1U) Depth 286 mm (11.25”) Weight 6 Kg (13.2 lbs) -10 °C ÷ 50 °C Operating Temperature Electrical specifications...
  • Page 19 Harris Micromax FM Exciter System Overview REV1 01/12/2007 TABLE 1-1 (continued) Technical Specifications SCA/RDS input 2 BNC unbal SCA/RDS input impedance 10 kOhm -20 dBm ÷ +13 dBm for 2.0 kHz SCA/RDS input level continuosly adjustable SCA/RDS amplitude/frequency response ± 0.2 dB, 40 kHz to 100 kHz...
  • Page 20 Harris Micromax FM Exciter System Overview REV1 01/12/2007 ANTENNA 30W RF PA AUDIO IN POWER SUPPLY MAIN CARD AES/EBU CARD CONTROLLER (OPTIONAL) FIGURE 1-3 Block Diagram WARNING: Disconnect primary power prior to servicing...
  • Page 21 Harris Micromax FM Exciter System Overview REV1 01/12/2007 30W RF PA POWER SUPPLY MAIN CARD CONTROLLER FIGURE 1-4 Location of Subsystems WARNING: Disconnect primary power prior to servicing...
  • Page 22 Harris Micromax FM Exciter System Overview REV1 01/12/2007 WARNING: Disconnect primary power prior to servicing...

  • Page 23: Introduction

    Harris Micromax FM Exciter Operation REV1 01/12/2007 SECTION 3 Operation Introduction This section of the manual contains information on how to operate the exciter and covers the following topics: • Turning on the transmitter (3.2) • Adjusting RF power output (3.3) •...

  • Page 24: Adjusting Rf Power Output

    Harris Micromax FM Exciter Operation REV1 01/12/2007 Adjusting RF power output In default mode, front LCD screen displays forward power output and modulation level as follows: To adjust power, press the KNOB for approximately 2 seconds until the display changes to SET mode as shown below.

  • Page 25: Operating Frequency Selection

    Harris Micromax FM Exciter Operation REV1 01/12/2007 Operating frequency selection To select operating frequency, first press the KNOB to go to SELECTION menu as shown below. Then, from this menu, turn KNOB to move the cursor to SET menu and then press knob to enter SET menu.

  • Page 26: Adjusting Modulation Deviation Level

    Harris Micromax FM Exciter Operation REV1 01/12/2007 Press the KNOB to enter frequency setup. Three arrows will appear to the left of the frequency display as shown below. Then use the knob to change the operating frequency. When the desired frequency is displayed on the screen, press the knob to change to the new frequency.

  • Page 27: Front Panel Lcd Display Menu Description

    Front panel LCD display menu description Front panel LCD display displays all operating parameters of the Micromax FM Exciter. This menu can be navigated using the knob located next to the LCD display. Below is a map of the menus available on the display.

  • Page 28: Operations Menu

    Harris Micromax FM Exciter Operation REV1 01/12/2007 3.6.1 Operations menu (menu 4) This menu contains the control function to turn on and off the exciter, ability to change the modulation meter on the LCD display to 10X modulation level and the ability to set PgD and PgR levels.
  • Page 29 Harris Micromax FM Exciter Operation REV1 01/12/2007 Attachment 1 How to remotely program operating frequency and RF power level using Windows Hyperterminal 1) Turn Exciter on into proper load 2) Open up Windows Hyperterminal on the computer 3) Select Connect using COMx (your serial or RS-232 port)
  • Page 30 Harris Micromax FM Exciter Operation REV1 01/12/2007 WARNING: Disconnect primary power prior to servicing...

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