LDG AT-200Pro Manual - page 22
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second to run. There is also a quick tune mode. If the swr is below 2.0 when you press the tune
button to start a tuning cycle, the tuner will first try a memory tune routine to see if it can achieve
a low swr without a complete re-tune. This also takes about a half second to run. If it does not
find a good match, then it runs a full tuning routine.
A word about tuning etiquette
Be sure to use a vacant frequency to tune. With today’s crowded ham bands, this is often difficult.
However, do your best to avoid interfering with other hams as you tune. Your AT-200Pro’s very
short tuning cycle, as little as a fraction of a second, minimizes the impact of your tuning
transmissions.
Care and Maintenance
Your AT-200Pro tuner is essentially maintenance-free; just be sure to observe the power limits
discussed in this manual. The outer case may be cleaned as needed with a soft cloth slightly
dampened in household cleaning solution. As with any modern electronic device, your AT-
200Pro can be damaged by temperature extremes, water, impact or static discharge. LDG strongly
recommends that you use a good quality, properly installed lightning arrestor in the antenna lead.
Technical Support
We are happy to help you with your AT-200Pro. Telephone technical support is available at 410-
586-2177 weekdays from 9 am to 5pm Eastern Time. Inquiries by Fax at 410-586-8475 are
welcome, and prompt e-mail support is available at ldg@ldgelectronics.com.
Warranty and Service
Your AT-200Pro is warranted against defects in parts or workmanship for two years from
purchase. The warranty does not cover damage due to abuse or exceeding specifications. This
warranty applies to the original purchaser only; it is not transferable. A copy of the receipt
showing the purchaser’s name and the date of purchase must accompany units returned for
warranty service. All returns must be shipped to us pre-paid; we will not accept units with
postage due. A return form is provided on our web site for your convenience.
If you need to return your AT-200Pro to us for service, package it carefully, keeping in mind that
we will re-use your packaging to return the unit to you. Download the return form from our web
site, fill it out and return it with your tuner. A self-addressed return-shipping label, while not
required, will help insure speedy and accurate delivery of your repaired unit. Include a full
description of the problem, along with your name, address and a phone number or e-mail address
where we can reach you with any questions. Repairs average about 3 to 6 weeks.
We will be glad to service your AT-200Pro after the warranty period has ended. We will notify
you of repair charges by phone or e-mail, and bill you after repairs are completed.
Firmware upgrades
From time to time LDG may release upgraded firmware for the AT-200Pro, refining operation
and adding features. Your AT-200Pro is not field programmable; you will have to remove the
present chip and replace it with the upgrade chip. You will return the old processor chip to LDG;
upgrades will be sold by exchange only. The processor chips are recycled and reprogrammed to