User manual WHITES ELECTRONICS MXT

[. . . ] MXT Table of Contents MXT Table of Contents Chapter 1 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Chapter 2 Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Standard Battery Holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] In the Prospecting MODE the use of the SAT (variable self-adjusting threshold) control will help to maintain a smooth THRESHOLD "hum" particularly at higher GAIN settings and will be covered in a later section. While using a steady slow search coil sweep speed, simultaneously advance GAIN towards "+3". If the "OVERLOAD-REDUCE GAIN/ LIFT LOOP" alert keeps popping up on the display, if a quiet smooth background THRESHOLD "hum" doesn't continue, or if ground noises are a problem reduce GAIN. capability of the MXT also functions more accurately when the GAIN is set at a level which allows for smooth operation. Too much GAIN can cause bad ground to distort the proper identification of iron and non-iron targets. Note: It is normal to hear changes, clicks or soft beeps, coming from the audio (speaker) during GAIN adjustments as the circuit shifts between hardware and software gains (different electrical parts of the circuitry). The GAIN control adjusts both the hardware gain (hard physical component) as well as the software gain (computer code) alternating between the two throughout it's range. As the MXT shifts between these two intricate parts of the circuitry an audio indication notes the transitions. If you adjust the Gain slightly, the audio notes a significant rather than slight change. The MXT provides more GAIN control range than is typically useful assuring performance is not left on the plate due to restricted assess/range. Likely few areas will allow maximum GAIN (full clockwise) without at least some degree of radical (noisy) operation. Setting in the + area requires a high degree of operator skill. SAT SPEED CONTROL (Prospecting Mode Only) Gain Adjustment (continued) If, of course, "OVERLOAD-REDUCE GAIN/ LIFT LOOP" message is displayed common for very nasty ground mineralization, you must heed it and reduce the GAIN rather than raise it. The object of increasing the GAIN is to get the maximum available depth from the detector WITHOUT causing the "OVERLOAD-REDUCE GAIN/LIFT LOOP" message to appear which indicates an overload of the circuit. In addition, any increase in GAIN adjustment should NOT BE at the expense of maintaining a smooth and constant THRESHOLD "hum". False signals, beeps and static from bits of mineralization, erratic behavior, and lapses in THRESHOLD all can be the result of running with too much GAIN. 19 Chapter 5 MXT Controls Chapter 5 MXT Controls Dual Control While operating in the Coin & Jewelry or Relic MODEs the Dual control operates as a DISC (discrimination ) control. DISC (Discrimination) is used to adjust the level of audio rejection against trash metals. The "P" (Preset) just below NICKEL is recommended for most general purpose searching. In this position, the detector will provide a reject response to most iron and light foil and respond to most valuables including jewelry. Positions lower than "P" (counterclockwise) provide less trash metal rejection, to the point of detecting virtually all types of common metals. Positions higher than "P" (clockwise) will reject more trash metals including aluminum pull tabs. The display will continue to indicate I. D. even though the audio discriminator will signal with a reject (suppressed or broken) sound. [. . . ] Always include a letter of explanation about your concerns, even if you have talked to the Service Center by telephone. Take care in packaging instruments for shipping and always insure your package. 33 Chapter 7 MXT Information Chapter 7 MXT Information Warranty If within two years (24 months) from the original date of purchase, your White's detector fails due to defects in either material or workmanship, White's will repair or replace at its option, all necessary parts without charge for parts or labor. Simply return the complete detector to the Dealer where you purchased it, or to your nearest Authorized Service Center. The unit must be accompanied by a detailed explanation of the symptoms of the failure. [. . . ]