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LDG OT-11P Instructions manual

Manual is about: Automatic Antenna Tuner For Ten-Tec Orion

Summary of OT-11P

  • Page 1

    Ot-11p automatic antenna tuner for ten-tec orion manual version 1.1 ldg electronics 1445 parran road, po box 48 st. Leonard md 20685-2903 usa phone: 410-586-2177 fax: 410-586-8475 ldg@ldgelectronics.Com www.Ldgelectronics.Com copyright © ldg electronics 2006. All rights reserved..

  • Page 2: Ot-11P

    2 ot-11p automatic antenna tuner for the ten-tec orion introduction 3 specifications 3 ot-11p auto tuner overview 4 installation 6 operation 11 theory of operation 12 some basic ideas about impedance 12 transmitters, transmission lines, antennas and impedance 12 the ldg ot-11p 14 a word about tuning...

  • Page 3

    3 introduction congratulations on selecting the ot-11p tuner for your ten-tec orion and orion ii transceiver. This tuner, when installed, will be fully integrated with your transceiver, and will be controlled by the radio's user interface. Your ot-11p will quickly and automatically match an amazing ...

  • Page 4

    4 ot-11p auto tuner overview your ot-11p comes fully assembled, aligned and ready to install. You will install the tuner inside your orion transceiver, resulting in a fully integrated internal tuner. After installation, your ot-11p tuner will be controlled by the orion's front panel tune button. Ins...

  • Page 5

    5 a word about power levels your ot-11p is custom designed specifically for the orion transceiver and its power levels. Ldg does not recommend using the ot-11p in any other application. If you choose to do so, never exceed 125 watts peak power input to the tuner. A minimum of 0.1 watts is required t...

  • Page 6

    6 installation before installing your ot-11p tuner, you should upgrade the radio's firmware to the latest version. Consult the radio's manual and the ten-tec web site for instructions on how to do this. When the firmware upgrade is complete, proceed with installing the tuner. With your orion powered...

  • Page 7

    7 step 2.4: locate connector j11, a white 7-pin connecter on the inside of the panel assembly near the center. There is nothing connected to it in the stock radio. Note: some orions have a blank connector here to prevent pin damage. You can remove the blank connector to install the black and white t...

  • Page 8

    8 step 2.7: reattach the front panel, making sure you don't pinch or bind any wires. Remember, the black tabs on the edge of the front panel go on the outside of the chassis. Step 2.8: take a short coffee break; the worst is over. Step 3: route the red wire connected to the ot-11p through the notch ...

  • Page 9

    9 \ step 4: carefully route the two coaxial cables attached to the ot-11p through the round grommet at the center rear of the radio. The coax cable connectors have flanges, pushing them through one at a time will make it easier. Route the two cables between the left rear shield panel and the circuit...

  • Page 10

    10 step 6: carefully insert the cable coming from the front of the ot-11p into the jack furtherest from the right edge of the pc board. This is the cable that is connected to the ot-11p through the small toroid sensor coil labeled t1 on the tuner. Insert the other cable into the jack nearest the edg...

  • Page 11

    11 operation enabling the tuner: in the orion tx setup menu, check the " internal tuner " setting. If it is set to " disabled ", change it to " enabled ". You only have to do this once, the first time you use the tuner. However, you will have to repeat this setting if you ever perform a hard reset o...

  • Page 12

    12 theory of operation some basic ideas about impedance the theory underlying antennas and transmission lines is fairly complex, and in fact employs a mathematical notation called “complex numbers” that have “real” and “imaginary” parts. It is beyond the scope of this manual to present a tutorial on...

  • Page 13

    13 the ratio of transmitted to reflected energy is called the “standing wave ratio”, or swr. An swr of 1 (sometimes written 1:1) indicates a perfect match. As more energy is reflected, the swr rises to 2, 3 or higher. As a general rule, modern solid state transmitters must operate with an swr of 2 o...

  • Page 14

    14 the ldg ot-11p in 1995 ldg pioneered a new type of automatic antenna tuner. The ldg design uses banks of fixed capacitors and inductors, switched in and out of the circuit by relays under microprocessor control. A built-in swr sensor provides feedback; the microprocessor searches the capacitor an...

  • Page 15

    15 the microprocessor runs a fine tune routine just after the tuner finds a match at an swr of 1.5 or less. This routine tries to get the swr as low as possible (not just 1.5); it takes about a half second to run. There is also a quick tune mode. If the swr is below 2.0 when you press the tune butto...

  • Page 16

    16 firmware upgrades from time to time ldg may release upgraded firmware for the ot-11p, refining operation and adding features. Your ot-11p is not field programmable; you will have to remove the present chip and replace it with the upgrade chip. Upgrades are expected to cost about $10-$20, and will...