Getting to know your at-1000proii

 

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Table Of Contents

Introduction                                                                                                               3

Jumpstart, or “Real hams don’t read manuals!”                                                    3

Specifications                                                                                                            4

An Important Word About Power Levels                                                                 4

Important Safety Warning                                                                                         4

Getting to know your AT-1000ProII                                                                         5

Front Panel                                                                                                                                                      5

Back Panel                                                                                                                                                       6

Installation                                                                                                                 7

Basic Operation                                                                                                       10

Using the Front Panel Buttons                                                                                                                   10

User Configuration Options                                                                                                                       10

Transmitting and Receiving                                                                                                                        13

Tuning                                                                                                                      14

Basic Tuning Operation                                                                                                                              14

Manual Memory Tune                                                                                                                                   14

Manual Full Tune                                                                                                                                          15

Bypass Mode                                                                                                                                                 16

Error Indication                                                                                                                                             16

Advanced Operation                                                                                               18

Manual Inductor/Capacitor Adjustments                                                                                                  18

High/Low Relay Adjustment                                                                                                                       18

Manual Memory Store                                                                                                                                  18

Status Check                                                                                                                                                 19

Application Notes                                                                                                   20

Mobile Operation                                                                                                                                          20

Internally Generated RF Noise                                                                                                                    20

MARS/CAP Coverage                                                                                                                                   20

Operation with LDG Electronics M-1000 External Meter                                                                         21

Tuning Hints                                                                                                                                                 21

Theory of Operation                                                                                                21

Some basic ideas about impedance                                                                                                          21

Transmitters, transmission lines, antennas, and impedance                                                                 22

The LDG AT-1000ProII                                                                                            24

A Word About Tuning Etiquette                                                                            25

Care and Maintenance                                                                                            25

Quick Reference                                                                                                      26

Technical Support                                                                                                   27

Two-Year Transferrable Warranty                                                                          27

Out Of Warranty Service                                                                                         27

Returning Your Product For Service                                                                     27

Product Feedback                                                                                                   28

INTRODUCTION

LDG pioneered the automatic, wide-range switched-L tuner in 1995. From its laboratories in St. Leonard, Maryland, LDG continues to define the state of the art in this field with innovative automatic tuners and related products for every amateur need.

Congratulations on selecting the LDG Electronics AT-1000ProII 1000-watt automatic tuner. The AT-1000ProII provides fully- and semi-automatic antenna tuning across the entire HF spectrum plus 6 meters, at power levels up to 1000 watts (250W on 6m). It will tune dipoles, verticals, Yagis, or virtually any coax-fed antenna. It will match an amazing range of antennas and impedances, far greater than some tuners you may have considered, including the built-in tuners on many transceivers.

The AT-1000ProII is designed to handle 1000 watts of output power, and is ideal for use with small outboard linear amplifiers rated up to 1000 watts, or even newer high power transceivers.

 

JUMPSTART, OR “REAL HAMS DON’T READ MANUALS!”

Ok, but at least read this one section before operating the AT-1000ProII:

1. Connect a 50-ohm coax jumper cable from the antenna jack on your amplifier to the TXjack on the back of the AT-1000ProII. (This cable must be rated to 1000 watts.)

2. Connect your antenna’s 50-ohm coax feedline to the ANT 1jack on the rear of the AT- 1000ProII.

3. Connect the supplied DC coax cable to the jack marked 12 VDC.Connect this cable to a DC source between 11 and 16 volts DC, 1000 mA. The jack center tip is positive.

4. Power up the transceiver, and select the desired operating frequency and mode.

5. Bypass the amplifier.

6. Make sure Antenna 1 is selected (ANT 2LED is off). Press ANTto toggle.

7. Begin transmitting, any mode1.

8. When the tuning cycle completes, activate the amplifier, and you’re ready to operate!

Note: With the amplifier active, it is suggested to place the AT-1000ProII in semi-automatic tuning mode to avoid re-tuning at high power levels.

 

 

1 In SSB mode, simply speak into the microphone while transmitting. Tuning may be performed at up to 125 watts of input power, provided that the transceiver employs a “roll-back” circuit to protect it from high SWR. For transceivers without roll-back circuits, power should be limited to 25 watts when tuning, to avoid damage to the transmitter or tuner.

SPECIFICATIONS

• Transmit Power Rating, 1.8 to 30 MHz:

• Single Side Band: 1000 watts

• CW: 750 Watts

• Digital (RTTY/Packet/PSK31, etc.): 500 Watts

• Transmit Power Rating, 50-54 MHz: 250 watts, all modes.

• Silver-teflon SO-239 connectors.

• Built-in 2-port antenna switch, with 2,000 memories each.

• Tuning time 0.2 to 15 seconds full tune, 0.2 seconds memory tune.

• 1.8 to 54.0 MHz coverage. Built-in frequency sensor.

• Tunes 6 to 1,000 ohm loads (16 to 150 on 6m), 6 to 4,000 ohms with optional 4:1 balun.

• LED bargraph displays power level, SWR, and status.

• Antenna Indicator LED shows the currently selected antenna.

• Bypass LED shows when tuner is in pass-thru.

• User-selectable operating parameters: Auto/Semi, 1kW/100W watt scale, and more.

• Optional radio interfaces for ICOM, Yaesu, and Alinco radios available.

• Optional large-display external analog panel meter.

• Power requirements: 11 to 16 VDC @ 1A max.

•
Dimensions: 11” x 10” x 3” Weight 4 pounds, 10 oz.

IMPORTANT SAFETY WARNING

Never install antennas or transmission lines over or near power lines. You can be seriously injured or killed if any part of the antenna, support, or transmission line touches a power line. Always follow this antenna safety rule: The distance to the nearest power line should be at least twice the length of the longest antenna, transmission line, or support dimension.

Your AT-1000ProII is a quality, precision instrument that will give you many years of outstanding service; take a few minutes to get to know it.

Front Panel

The front panel of the AT-1000ProII features eight pushbuttons, two LED bargraph scales, and three indicator LEDs:

 

• Power:Turns the unit on or off. The Power LED glows when the power is on.

• Func:Activates secondary function of other buttons.

• Ant:Selects the active antenna port.

• C Up:Manually increase capacitance.

• C Dn:Manually decrease capacitance.

• L Up:Manually increase inductance.

• L Dn:Manually decrease inductance.

• Tune:Initiates memory or full tuning cycle. Momentary push places tuner in bypass.

• PWR Meter:Bargraph display indicates forward power in 0-100 and 0-1000 watt ranges.

• SWR Meter:Bargraph display indicates SWR during tuning or transmission.

• Bypass LED:Indicates Bypass mode is active.

• ANT 2 LED:Lights when Antenna 2 is selected. Off when Antenna 1 is selected.

 

Each of the pushbuttons has the primary function listed above when pushed. Additionally, pressing the FUNCbutton before pressing any other button will activate that button’s secondary function.

The power button on the AT-1000ProII actually places the tuner in bypass and enters a low- power sleep mode, rather than turning the unit fully off. Press the Power button for 1 second to turn off, or momentarily to turn on.

 

Back Panel

The rear panel of the AT-1000ProII has seven jacks.

 

 

• Ant 1:Connect a 50 ohm antenna coax feedline to this SO-239 connector. This jack is automatically disconnected when the AT-1000ProII is turned off.

• Ant 2:Connect a second 50 ohm antenna coax feedline to this SO-239 connector. This is the antenna jack that is active when the ANT 2LED is lit on the front panel. Also, this jack is active when the AT-1000ProII is turned off.

• Gnd (wing nut):Connect to the antenna system ground.

• Tx:Connect a 50 ohm jumper coax from this jack to the ANT jack on the rear of the amplifier.

• Ext. Meter:Connect the LDG M-1000 External Meter to this jack, or use for remote control via PC.

• Radio:(optional) Connect the optional IC-PAC (Icom), Y-ACC (Yaesu), IC-2000 (Yaesu FT- 2000), or AL-PAC (Alinco) radio interface cable.

• Power:Connect the supplied DC coaxial power cable to this connector, and connect to a source of 11-16 VDC @ 1A. Center pin is positive.