Motorola F2265A Owner's Manual

Motorola atu hf-ssb automatic antenna tuner 1.6-30 mhz, 125 w.
Hide thumbs
ATU
HF-SSB Automatic Antenna Tuner
1.6-30 MHz, 125 W
Owner's Manual
68P02948C35-A

Advertising

   Related Manuals for Motorola F2265A

   Summary of Contents for Motorola F2265A

  • Page 1

    HF-SSB Automatic Antenna Tuner 1.6-30 MHz, 125 W Owner’s Manual 68P02948C35-A...

  • Page 3

    HF-SSB Automatic Antenna Tuner 1.6-30 MHz, 125 W Owner’s Manual 68P02948C35-A...

  • Page 5: Table Of Contents

    HF-SSB Automatic Antenna Tuner 1.6-30 MHz, 125 W TABLE OF CONTENTS Para. Page Performance Specifications............................iii Model Complements ..............................v Accessories................................... v CHAPTER 1 DESCRIPTION GENERAL DESCRIPTION ......................FUNCTIONAL DESCRIPTION......................1-1 CHAPTER 2 INSTALLATION GENERAL ........................... RECOMMENDED EQUIPMENT ....................2.2.1 Tools............................2-1 2.2.2 Accessories ..........................2-1 MOBILE INSTALLATION INSTRUCTIONS ................

  • Page 6: Table Of Contents

    TABLE OF CONTENTS (Cont.) Para. Page CHAPTER 3 THEORY OF OPERATION FUNCTIONAL DESCRIPTION....................3.1.1 ATU Function ..........................3-1 3.1.2 ATU Operation .......................... 3-1 BLOCK DIAGRAM DESCRIPTION ..................3.2.1 RF Matching Network........................ 3-2 3.2.2 RF Sensor........................... 3-2 3.2.3 Tuner Logic..........................3-2 3.2.4 Latches and Relay Drivers ......................

  • Page 7

    PERFORMANCE SPECIFICATIONS ELECTRICAL Frequency Range 1.6-30 MHz Input Power Capability 125 W (two-tone test method and a single tone transmission for CW Morse code, both at a duty cycle of 1 minute transmission/4 minutes reception) Tuning Accuracy Automatically tunes to 50 Ω with a nominal VSWR of 1.5 (maximum VSWR of 2) on any frequency in the 1.6-30 MHz range Number of Memory Channels...

  • Page 8

    GENERAL Environmental Conditions Vibration MIL-STD-810D Method 514.3 and EIA RS152B Shock MIL-STD-810D Method 516.3 and EIA RS152B Sand & Dust MIL-STD-810D Method 510.2 Rain MIL-STD-810D Method 506.2 Salt Fog MIL-STD-810D Method 509.2 Operating Temperature -30ºC to +60ºC Storage Temperature -40ºC to +85ºC Humidity 90 to 95% @ 50ºC Dimensions (H x W x L)

  • Page 9

    MODEL COMPLEMENTS Model F2265A FLN2301 Mobile Automatic Antenna Tuner (ATU) 125 W FHN5914 Housing FLN8372 Antenna Tuner Board FHN5760 ATU Assembly FKN4314 High Voltage Cable Kit (for Use with Mobile Whips) FKN4589A RF Coax Cable Kit, 17 feet 68P02948C35 ATU, HF-SSB Automatic Antenna Tuner Owner’s Manual...

  • Page 11: Description

    The HF-SSB Automatic Antenna Tuner Unit (ATU) The F2265A Automatic Antenna Tuner (ATU) operates model F2265A is an antenna matching network that in the 1.6 to 30 MHz frequency range at 125 watts peak provides efficient RF power transfer from the radio envelope power (PEP).

  • Page 13: Tools

    CHAPTER 2 INSTALLATION 2.3.2 INSTALLATION INSTRUCTIONS GENERAL The radio and ATU are factory-preset for proper tuning NOTE operation and require no additional adjustment or The installation instructions included in programming. the label on the unit cover apply to base station installation.

  • Page 14

    Installation The suggested mobile installations are illustrated in Figure 2-1. Figure 2-1. Suggested Mobile Installations 2.3.2.1.2 ATU Location Figure 2-2. Effective Installations The ATU should be mounted in a location, where the ATU output (antenna) connector is as close as possible to the antenna input connector.

  • Page 15: Operational Check

    Installation NOTE 2.3.2.3 Cable Interconnections It is recommended to shorten the high Step 1. Route the RF cable between the ATU and the voltage cable as much as possible, radio. providing that the distance between the Step 2. Connect the RF coaxial cable to the ATU's RF antenna base and the ATU is short enough.

  • Page 16: Antenna Installation

    Installation BASE STATION INSTALLATION INSTRUCTIONS 2.4.1 ANTENNA INSTALLATION The recommended length of antennas for base stations is 23 to 60 feet for long wire antennas and 23 to 35 ft for whips, in the specified frequency range. Shorter antennas are recommended for mobile installations only.

  • Page 17: Antenna Ground Plane

    Installation 2.4.2 ANTENNA GROUND PLANE The ground plane shape for an Inverted "L" wire antenna should be distorted with most of the surface area placed under the antenna (see Figure 2-8). The 2.4.2.1 General sloping wire antenna should have a circular ground The ground plane provides an RF current return path plane shape with the antenna feed point at the center.

  • Page 18

    Installation or a connection to a water pipe of the building, is Step 3. If a wire antenna is used, connect it directly to required for lightning protection. the ATU RF output terminal. Use mechanical strain relief similar to the one shown in Figure 2-10. Step 4.

  • Page 19: Theory Of Operation

    CHAPTER 3 THEORY OF OPERATION If the tune power is within the specified range, the ATU FUNCTIONAL DESCRIPTION captures a 20ms sample of the signal. The sample signal frequency is divided by 128 and measured by a 3.1.1 ATU FUNCTION counter.

  • Page 20: Block Diagram Description

    Theory of Operation • signal indicates the forward power. BLOCK DIAGRAM DESCRIPTION • signal indicates the reverse power. The ATU block diagram is shown in Figure 3-1 and described in the following sections. • An RF sample for calculating the signal frequency. 3.2.1 RF MATCHING NETWORK 3.2.3 TUNER LOGIC The RF signal from the radio is applied to the RF...

  • Page 21: Latches And Relay Drivers

    Theory of Operation Figure 3-1. ATU Block Diagram 3.3.1.1 Phase Sensor 3.2.4 LATCHES AND RELAY DRIVERS The phase sensor measures the phase difference The Latches and Relay Drivers control the components between the input signal voltage and the input signal of the matching network.

  • Page 22: Rf Matching Network Circuit

    Theory of Operation 3.3.1.2 and V Sensor 3.3.1.4 Frequency Sample Capacitors C200, C211 and C212 sample the RF signal 3.3.1.2.1 General during the tuning process. Sampling is enabled for a Voltage representing the forward power (V ) is derived duration of 20 milliseconds under control for the Tuner Logic circuit.

  • Page 23: Tuner Logic Circuit

    Theory of Operation network by relay K113. C is most useful in the low 3.3.2.2 frequency range. The input capacitor network (C ) enables movement towards the Smith Chart center after crossing the G=1 3.3.2.5 circle. The function of the variable intermediate capacitor is made up of 26 capacitors (C169-C181, C183, (C111 through C117) is identical to that of C C185-C191, C196-C198, C201, C202) that can be...

  • Page 24

    Theory of Operation • • Shorts the sensor outputs to the ground after the Determining the load characteristics: tuning process is completed. - if PH-C>PH-L, the load is capacitive; • Stores the tuning data for each frequency used. - if PH-L>PH-C, the load is inductive. •...

Comments to this Manuals

Symbols: 0
Latest comments: