Whites MX 7 User manual

MX 7
Metal Detector
Owner’s Manual

M 7 Sport Specifications
Type of Detector All-Purpose
Weight 3.6 lbs. including batteries
Backlight Yes
Adjustable Shaft Yes
Assembled Length Mininum: 45” Maximum: 55”
Batteries AA x 8 Included
Nicad Rechargeable Battery System Optional
Headphone Jack 1/4” Adapter Included
Arm Rest Adjustable
Arm Rest Strap Included
Control Box Mount Standard
Number of Frequencies 1
Frequencies 13.8 kHz
Warranty 2 Years
Instruction Manual Yes
Searchcoil Type, Size and Shape Concentric, 9 1/2” Round
Interchangeable Searchcoil Yes
Waterproof Searchcoil Yes
Display Type LCD
Number of Search Modes 7
Modes All Metal
Coins & Jewelry
Beach
Relics
Prospecting
Hi-Trash
Pinpoint
Technology VLF Single Frequency
Discrimination Adjustable
Threshold Yes
Sensitivity Adjustable
Ground Balancing (Fixed) Yes
Ground Balancing (Automatic) Yes
Target Identification Yes
Programmable Target ID Yes
Number of Target ID Segments 20
Depth Indication Yes
Pinpoint Mode Yes
Volume Adjustable Yes
Number of Audio Tones 22
Low Battery Warning Yes
Battery Life 20+ Hours
3

Contents
Specifications ........................................................................................................................... 3
Assembly ................................................................................................................................ 6-7
Batteries ..................................................................................................................................... 7
Getting Started ........................................................................................................................ 8
Quick Reference Tables
Search Mode ......................................................................................................... 9
Options Keypad .................................................................................................. 10
Options ............................................................................................................ 10-11
Search Programs ...............................................................................................12
Features
Live Navigation
Sensitivity ................................................................................................................12
Threshold ........................................................................................................ 12-13
Display and Controls
Power .......................................................................................................................14
Track ................................................................................................................. 14-15
Sensitivity ........................................................................................................ 15-16
Programs ...............................................................................................................16
Reset ........................................................................................................................16
Discrimination ......................................................................................................17
Volume .................................................................................................................... 18
Reject Volume .............................................................................................. 18-19
Threshold ............................................................................................................... 19
Tone ID ............................................................................................................. 19-20
Depth Units ............................................................................................................20
Backlight ..................................................................................................................21
Frequency Offset .................................................................................................21
Salt Track ....................................................................................................... 21-22
All Metal Features
SAT (Self-Adjusting Threshold) .....................................................................22
VCO (Voltage Controlled Oscillator) ............................................................23
Iron Grunt ...............................................................................................................23
Proper Care .............................................................................................................................24
Searching ..................................................................................................................................24
Digging ................................................................................................................................ 24-25
Accessories .............................................................................................................................25
Warranty and Service .........................................................................................................26

1. Remove all parts from the shipping carton and check assembly diagram
to ensure all parts are present.
2. Install black rubber washers on fiber lower rod; attach search coil to
lower fiber rod. Use only the nonmetallic washers, fiber bolt, and fiber
thumbnut provided to secure search coil loop to the lower fiber rod.
3. Insert lower fiber rod into center rod so that the spring buttons line up
with one of the length-adjustment holes in the center rod. Turn the cam-
lock to eliminate any slack.
4. Insert the center extension rod into the hand-grip section. Turn the cam-
lock to eliminate any slack.
5. Wind the search coil cable around the rods, first revolution over the top
of the rod, all the way to the display pod. Plug the cable into the connector
on the back of the display. Tighten the retainer ring securely.
6. Thread the velcro armcup through the slots on the armcup. With your
arm in position, fold the strap over onto the velcro so that the strap is
loose enough to to pull your arm in and out of the armcup.
7. Grip the detector and sweep the search coil over the floor. If the fit feels
Search Coil
Fiber Bolt,
Thumbnut &
Non-metallic
Washers
Camlock
Search Coil Cable
Center Rod
Camlock
Assembly
6

uncomfortable, adjust the position of the lower fiber rod. The ideal position
allows you to stand up straight and sweep the search coil over the ground
without stooping over.
8. Install eight “AA” batteries in the battery holder carefully noting the + & -
positions marked inside the battery holder. Insert the battery pack, lining
up the contacts. Using a firm motion, snap the battery pack into place,
veryify that the Battery Retainer Buttons are engaged.
Tips on Batteries
• The MX 7 operates for more than 40 hours (without backlight and with
headphones) using eight quality “AA” batteries.
• High-quality “AA” alkaline batteries are recommended. Rechargeable
NiCad, Nickel Metal Hydride, or other similar “AA” substitutions work well.
Batteries near or above 2 volts per cell and higher are not recommended.
• Battery life will change with battery type, operating temperature, and
backlight use. Lowering the volume of the built in speaker or using head-
phones extends battery life.
Search Coil
Camlock
Handgrip
Display
Search Coil
Connector
Control Pod
Control Buttons Velcro Armstrap
Battery Door
7
Headphone
Jack
Battery Retainer
Button (1 each side)

Getting Started with MX 7
1. Press the power ON button. Upon initial power up, the detector defaults
to the Coin and Jewelry program.
2. Sweep the search coil from side to side, keeping it level and close to the
ground. Overlap each search pass by at least 50%.
3. Once a target is detected, indicated by a consistent beep, sweep several
passes over the target center and note the display identification and
target depth.
4. If the target indicates dig worthy, press and hold the Pinpoint button
(√/X). If tapped, the pinpoint button will lock in the Pinpoint mode. After
pinpointing remember to tap the pinpoint button once more to return to
Search mode.
5. The pinpoint spot is an imaginary line through the center of the search
coil. It is important to determine where this detection line begins and ends
on the coil. The pinpoint spot is in the center of the search coil
6. Sweep the target area slowly. The highest pitch and shallowest depth
indicate target center.
7. Practice with a visible object above ground, moving back and forth over
the target.
8. Use care in digging properly for the terrain. Fill in all holes and discard any
trash found in the proper receptacle. By not leaving trash and unsightly
holes behind you, open areas will continue to be available for you and
others to metal detect.
Controls
The MX 7 operates in either Search or Options mode. The detector will con-
tinue to provide audio feedback when in Options mode, but the display will be
used to show options rather than target information.
The Power button turns on the MX 7. Tapping the power button while the
detector is on will turn on the backlight. Holding the power button while on will
turn the detector off.
8

Search Mode
The MX 7 enters Search mode when turned on. In Search mode, the buttons
on the keypad perform the following functions:
Function Details
Increases Threshold volume
Decreases Threshold volume
When adjusting Threshold, the dis-
play will momentarily read “THRESH”
and the current threshold volume is
displayed on the central numbers
Increases Sensivitivity
Decreases Sensivitivity
Be careful to adjust Sensitivity to
ground conditions. Heavy mineraliza-
tion requires lower settings
Tapping toggles Pinpoint mode
on or off. Holding forces Pinpoint
mode on until the Pinpoint button
is released
Pinpoint mode is non-motion and
all-metal
Tapping locks or unlocks the
ground tracking. Holding per-
forms manual ground balance
When locking the tracking system,
the display will momentarily read
“LOCKED” and a lock icon appears
below the TRACK label. When
unlocking the tracking system, the
display will momentarily read “TRK-
ING” and the lock icon will disappear.
In manual ground mode, the number
displayed is the relative ground
phase, and the depth meter shows
ground strength
Enters Options Mode
+
+
a
/
x
TRACK
OPTIONS
9

Options Keypad Functions
When the user presses the Options button while in Search mode, the MX 7
enters Options mode. As mentioned above, Options mode will only affect the
display. The detector will still provide audio feedback from the target system.
The MX 7 will automatically leave Options mode approximately 10-15 seconds
after the last time any button is pressed on the keypad. When in Options
mode, the buttons on the keypad perform the following functions:
Button Function Detail
Moves to the
previous option in
the menu
Moves to the
next option in the
menu
Increases the
value of the cur-
rent option in the
menu
Decreases the
value of the cur-
rent option in the
menu
Affects all options except RESET
If the current op-
tion in the menu
can be toggled
(turned on or off),
toggles that value
Affects DISC, SALTRK, INCHES/
METRIC, IRNGNT, VCO, and RESET
options
No function in
Options mode
Leaves Options
mode
Options
Name Description Min Max Note
VOLUME Volume 0 30
THRESH Threshold 0 20
+
+
a
/
x
OPTIONS
TRACK
10

11
DISC Discimina-
tion
Using the +/- buttons controls which discrimination zone
is being adjusted. Using the pinpoint button will turn the
current discrimination zone on or off. If the zone selection
cursor is left under a particular zone for a couple seconds,
the text will change from “DISC” to a short descriptor of
what kind of targets in that zone, (e.g. GOLD, QUARTR, etc.).
All zones to the left of the cursor can be discriminated
and all others accepted by holding the pinpoint button for
a short time. The disc mask can be cleared by placing the
cursor on the lowest zone and holding the pinpoint button
TONE Tone ID
Mode
1 20 Central number displays the number
of tones in the selected Tone ID mode.
Avaialble settings are 1, 2, 4, 8 and
20-tone modes. Only in programs with
Discrimination Audio
REJ VOL Reject
Volume
10% 70% Assigns rejected targets a reduced
volume level. Enhances results in heavy
trash
VCO ON/
NO VCO
VCO All
Metal Audio
Turns All Metal audio on or off. Only available in programs
that use All Metal audio.
SAT SAT Control 0 8 Controls the amount of SAT used in All
Metal modes. Higher SAT values provide
faster target response/recovery; lower
SAT values provide better depth. Only in
programs that use All Metal Audio
PRGRAM Program Changes the search program- Coin and Jewelry, All Metal,
Beach Prospecting, Hi-Trash and Relic
IRNGNT Iron Grunt OFF ON Turns on or off the Iron Grunt in an All
Metal audio mode. Only available in pro-
grams that use All Metal audio
SALTRK Salt Track
Mode
OFF ON Tuns on or off the ability for the ground
tracking system to track to soil with
large salt content. Used mainly on the
beach or in alkaline soils. This option is
always turned on in the Beach program
FREQ Frequency
Offset
-3 7 Adjusts operating frequency. Used for
noise rejection and to allow 2 units to
operate in close proximity
LIGHT Backlight
Strength
0 5 Adjusts the strength of the LCD Back-
light. If backlight strength is decreased
to 0, the backlight is off. If the backlight is
later turned on using the Power button,
backlight strength will return to the
default value of 3
INCHES/METRIC Depth Scale Allows the user to select whether to show depth valuels in
inches or centimeters
RESET Factory
Reset
Allows the user to perform a factory reset, returning all
programs and options to initial factory default settings
AUD MOD Reduces
volume
on deeper
targets
Not available in All Metal Modes

Search Programs
Search Programs are implemented as a method for quickly changing multi-
ple options at the same time. Some of these options are also available in the
menu (ex. Discrimination), and some are not (ex. the type of audio being used).
The factory default settings for each program are intended for general use.
Adjustments made to options in the menu are saved each time the user
changes programs and each time the MX 7 is turned off. Performing a factory
reset as detailed on page 16 will return all Programs to their factory default
settings.
Program Audio Discrimination Details
Coin & Jewelry Discrimination Rejects all negative
VDI numbers
Defaults to 1-tone mode
All Metal All Metal None
Beach Discrimination Rejects all negative
VDI numbers
Defauts to 4-tone mode, with
Salt Tracking turned on
Prospecting All Metal None Defaults to using the Iron
Grunt
Hi-Trash Discrimination Rejects VDI numbers
below +15
Defaults to 4-tone mode
Relic Mixed Mode Audio
(Tone ID and All Metal
simultaeously)
Rejects VDI numbers
below -10
Defaults to 2-tone mode for
the discrimination portion of
the audio
Features (Detailed)
Navigation
During normal searching there are two live controls that add convenience for
the two most common adjustments; Sensitivity and Threshold.
SENSITIVITY: During searching (in all search modes) pressing the + or -
buttons adjusts the sensitivity, or responsiveness, of the MX 7. If the sensitivity
is set too high, excessive noise will make it difficult to locate targets due to
the noise from either the ground or external electric interference. Too-high
sensitivity is noted by false signals. Lowering the sensitivity will improve perfor-
mance. Increase sensitivity for increased depth when the ground and external
conditions allow. Note: Few areas will allow maximum sensitivity.
THRESHOLD: The MX 7 can be efficiently used with or without a threshold
hum. Threshold can be defined as a steady continuous background hum. In
all search modes, the up & down arrows control the Threshold. The lowest
setting of 0 is Silent Search. Use of a threshold provides more information
regarding what the metal detector sees. Rejected targets or ground
12

peculiarities often cause the threshold to fade to silent. Changing the search
orientation can correct this anomaly. Searching in silence (no threshold) has
the advantage of better focus on the desired target responses. Unlike older
metal detectors, there is no difference in detection depth using either thresh-
old or silent search. However, those who search with a threshold tend to find
more artifacts as the threshold alerts the user to spots that have something
unusual about them—perhaps two targets near each other—and thus more
attention is paid checking for possible worthwhile targets.
Options- In Option mode/Menu (after pressing the Options button), the up and
down arrows are used to select the specific option to adjust. The + & - buttons
make adjustments to the selected option.
Summary:
Quickly press and depress the Option button and use up and down arrows to
view all the options; press + & - to adjust a specific option. Use the up and
down arrows to go to the next option, or press Options to search. Exit from
Options is automatic after 10–15 seconds. Simply press Option again if you
desire further adjustment.
Detection (Search mode) will continue while in the Options mode. Once options
have been adjusted, pressing Option button again will exit options.
Options will be slightly different depending on the search program. For exam-
ple All Metal, Prospecting, and Relic have the features that are specific to All
Metal-type programs. Features such as Self-Adjusting Threshold (SAT) and
Voltage Controlled Oscillation (VCO) only appear when one of the All Metal
modes are in use. These features have no influence over the Discrimination
programs and they will not appear as options.
13

Display and Controls
POWER
A quick press of the button turns the MX 7 ON. Another quick press of the
power button toggles the backlight on and off. Pressing and holding ON/OFF
for a second turns the detector OFF.
Options: Activates option selections. Up & down arrows select among avail-
able options. Pressing + or - adjusts that specific option. Select another option
by pressing up or down arrows again again or exit by pressing the Option but-
ton again or waiting for the option to time out automatically (10–15 seconds).
√/X: Access Pinpoint mode. Also used for some menu sequences.
In Search mode, + and - adjust Sensitivity; in Options they select the level of
adjustment.
TRACK
The MX 7 automatically self-adjusts to the ground mineralization currently be-
ing searched and tracks to changes in mineralization. Ground compensation
and tracking to ground mineral changes is fully automatic. Automatic ground
tracking improves performance over typical/normal ground where ground
mineral changes are naturally occurring and gradual.
Spotty high ground minerals (naturally occurring or not), mixed with lower min-
eralization, can cause errors in ground tracking and result in instability and dif-
ficulties (as if the sensitivity was set too high for the area). If stability does not
return at reasonably reduced sensitivity settings, spotty high mineralization is
likely the cause. To search these difficult areas, locking the ground balance at
a fixed level more often than not resolves or reduces instability.
Pressing the TRACK button can lock tracking. However, the level the ground
balance is set to when locked is critical for stable operation. Holding the Track
button puts the detector into manual ground balance mode, where the num-
ber displayed is the relative ground phase, and the depth meter shows ground
strength.
• Option #1: In 80% of situations, tracking can be locked as soon as the detector
is turned on. This will result in improved performance in difficult spotty areas.
Locking the Tracking prior to searching locks the ground balance at the ferrite
(high iron) level.
• Option #2: In 20% of situations, a natural or man-made spotty mineralization may
still cause difficulties at the initial ferrite, locked-ground rejection level. In these
areas, find a highly mineralized spot that is representative of all the spots in the
area, sweep the search coil 6–12 times (or until it doesn’t respond) and press
the TRACK button. In this case, the user is locking the ground rejection level at the
high mineral spot so that all similar spots can be ignored (no response).
14

If the minerals within these spots exceeds typical ground mineral levels, and
are seen as metal ore, they cannot be reduced by ground tracking. Reducing
the sensitivity of the detector, or using the discrimination mask, is necessary
to reduce metal responses. In some regions, hot rocks (iron rich stones) can
exceed the metal content of a mineral and thus exceed the range of any metal
detector’s ground rejection. Any metal (gold silver, copper, nickel, aluminum
etc) can be found in metal ore (rock) form, as well. Again, Discrimination and
Sensitivity adjustments are the only way to deal with these responses.
The MX 7 captures ground mineral information in real time. Turning off the
Power and turning back on will automatically unlock a locked ground balance
level. This is necessary to capture new ground information. Switching in and
out of the Beach mode (a different ground rejection range) will also unlock a
locked ground balance. When powering ON/OFF or switching in or out of the
Beach mode, remember to re-lock the ground tracking if that is required for
the area.
SENSITIVITY
Sensitivity is used to increase or decrease responsiveness to targets, ground,
and external electrical noise. Maximum depth will be achieved by using the
highest setting possible for the area. Settings 1–10 are available. Increasing
sensitivity to 10 activates the Audio Boost feature, which amplifies the audio
responses of small signals. Audio Boost is intended to achieve maximum preci-
sion on weak signals, and is not well-suited for general searching. Reduced
sensitivity is often needed to search bad ground conditions or high electrical
activity areas.
When the ground is highly mineralized (typically high iron), reduced sensitivity
often increases detection depth. Finding the level that provides for smooth,
stable operation and easy target identification is important to maximize perfor-
mance. Few areas will allow maximum sensitivity settings.
• During normal searching, press the + button to increase sensitivity; press the - button to
decrease sensitivity. The MX 7 provides quick and convenient up or down sensitivity during
use without accessing Options. The current sensitivity setting shows briefly where the VDI
number normally is displayed.
• Sensitivity adjustment is not availabe in Options, but only with the + or - buttons when not in
the Options mode.
PROGRAMS
A program is a complete selection of options for specific or targeted metal
detecting.
To select a Program:
1. Press Options and use the up & down arrows to select Program.
2. Press + & - to select the highlighted program.
3. Press Options again to return to normal searching or wait for it to time out
(10–15 seconds).
15

Coin & Jewelry: This is the primary search program used for general-purpose
searching. When searching typical soil for coins, jewelry, or any other precious
metals, and trash metal rejection is needed, Coin & Jewelry discriminates
against (rejects) ferrous (iron) objects and light foil. Discrimination can be
customized in the Coin & Jewelry mode; see Discrimination.
Beach: The Beach program has features built in to ignore conductive wet
or salty soils. Use Beach anytime you are searching a salt-water beach. And
because many fertilizers are conductive when wet, heavily fertilized farm fields
may also require the Beach mode when they are wet. The Salt Track feature
can be added to any program using the Options feature. One may need to add
the Salt feature to the Relic mode in highly fertilized wet fields, and/or to the
Prospecting program when searching desert alkali (salt) areas.
All Metal: Use the All Metal program to detect all metal types, including iron/
steel. Finding property markers, clearing nails from a driveway, locating lost
tools, relic-hunting when iron is of interest are examples of when All Metal
would be used. All Metal is a superior search program compared to locking in
the Pinpoint mode, which has electronic aids to help pinpoint that are not ideal
for general searching. All Metal does have optional VCO audio so target size
and strength influences the audio.
Relic: Optimized for searching encampments and abandoned homesteads.
Very little trash metal rejection.
High Trash: Some areas (especially public areas) have high concentrations of
trash. To productively search high trash areas requires a higher degree of Dis-
crimination (trash rejection). If trash becomes an issue using one of the other
programs, try High Trash.
Prospecting: For gold nugget searching. Also great for prospecting for other
types of naturally occurring metals: copper, silver, nickel, etc.
Pinpoint: Once the choice has been made to dig, targets can be precisely
located by pinpointing, defined as static search mode. √/X button accesses
the Pinpoint mode. Pinpoint is different from an All Metal mode in that special
features are activated to aid in target centering. Pinpoint can be toggled in the
hunting mode with a quick press. Alternately, the button can be held to keep
the detector in pinpoint mode. Pinpoint mode is not for general searching.
RESET
1. Restore to Factory Settings:
2. Press Option, use the up and down arrows to select RESET.
3. Press and hold Pinpoint button.
4. All options return to factory settings.
16

Discrimination
Each of the MX 7 programs begins with Discrimination settings pre-selected
for most hunting.
The MX 7 has the ability to accept or reject metal types
based on their conductivity and/or electrical phase. Target
conductivity/phase is indicated on the display VDI scale (Visu-
al Discrimination Indication) with a VDI reference number. By
learning what targets consistently indicate specific VDI num-
bers, you can be sure to accept or reject the different target
VDI ranges that interest you.
Many types of targets share similar VDI number ranges. For
example gold jewelry of varied sizes/types shares the same
VDI number range as aluminum of varied sizes/types. Deeper
depths suggest the target being heavier gold; shallow depth
indications suggest the target being lighter-weight aluminum.
However, due to the wide variety of gold alloys and sizes, to
find all the gold jewelry, digging lead, pull tabs, and screw caps
is to be expected.
Trash metals (iron) often produce some beep, different from
an accepted good target. In most cases, iron will produce a
broken or inconsistent tone whereas an accepted good target
produces a more consistent beep.
The display can help, but an inconsistent tone is most likely a
rejected target. If you have trouble recognizing these inconsis-
tent beeps and displays, find the sweep speed that enhances
the rejection sound to the point you can recognize it when
compared to the sound of a good target. Accuracy is greatly
increased sweeping the center of the target. Pinpoint (press
√/X and “x” the area, return to Discrimination (press √/X again), then pass
the search coil over target center and note the sound and display indication.
W hen a metal target doesn’t indicate as expected, peculiarities within that metal’s
alloy mix (metal types) are usually to blame. As alloyed steel bottle caps age, the
iron deteriorates and the better (non-iron) alloys remain and become prominent
(e.g., very old bottle caps are likely to indicate as quarters). The longer they are
in the ground, the more the iron dissolves and the stronger/better the non-iron
looks to a metal detector. Soil conditions, corrosion factors, depth, and other vari-
ables can skew the audio and display indications and, thus, Discrimination settings.
Used properly, however, Discrimination will more than double your time spent
digging valued targets. The point is to reject the most common trash and accept
the most common good targets. The MX 7 has 20 rejection ranges. Discrimina-
tion comes already set up for the Program you have selected.
17

To Customize Discrimination:
1. Customizing discrimination for targets you want to accept/reject allows
greater versatility. Iron will likely jump all over the scale inconsistently. You
can only reject the first range for iron. For other targets that indicate
consistently in a range, identify and then reject that range.
2. Press Options and use up & down arrows to select Discrimination.
3. Use the + or - buttons to select the desired range you want to change,
indicated by the flashing curser. Press pinpoint button to toggle between
accepting or rejecting that range. The pinpoint button changes that range
from reject (solid indicator bar) to accept (blank indicator bar) or from
accept (blank indicator bar) to reject (solid indicator bar).
4. Pressing and holding the √/+ will set all ranges to the left and clear all to
the right.
5. Press Options to exit, or wait 10–15 seconds for the Options mode to
automatically time out.
Disc Tips: In the DISC menu option, if the zone selection cursor is left under
a particular zone for a couple seconds, the text will change from DISC to a
short descriptor of what kind of targets one might find in that zone, (e.g. GOLD,
QUARTR, etc.)
Volume
Volume adjusts how loudly a metal target beeps. The MX 7 provides adequate
volume levels for individuals with good hearing. Those with impaired hearing
may benefit from headphones.
To Adjust Volume:
1. Press Options and use the up or down arrows to select Volume.
2. Press + or - buttons to select the desired volume level.
3. Press Options to exit, or wait 10–15 seconds for the options mode to
automatically time out.
Reject Volume (REJ VOL)
Discrimination normally suppress the audio sound (beep) of metal targets
that are selected for rejection. Although some rejected targets produce some
broken audio sounds, as much audio is suppressed as is possible.
REJ VOL (Rejection Volume) allows a user to change from suppressing the
audio (beep) to assigning the rejected targets a volume level lower than that of
the accepted targets. Searching in this way allows one to hear and immediate-
ly recognize the rejected targets and thus slow down and check for possible
good targets nearby.
18

0 = Normal Discrimination Audio. Rejected target audio is suppressed
10= Audio volume of rejected targets is 10% that of accepted targets
20 = The audio volume of rejected targets is 20% that of accepted targets
30= The audio volume of rejected targets is 30% that of accepted targets
40 = The audio volume of rejected targets is 40% that of accepted targets
50 = The audio volume of rejected targets is 50% that of accepted targets.
60= The audio volume of rejected targets is 60% that of accepted targets
70= The audio volume of rejected targets is 70% that of accepted targets
100% audio for all targets can be acheived by accepting all targets using the
Discrimination option or using one of the All Metal type modes.
When using a mixed mode such as the Preset RELIC Program, Rejection
Volume can be used to reduce or eliminate the volume “beep” of rejected
targets. However, in All Metal Audio Programs such as Prospecting, Rejection
Volume will not have any influence. Rejection Volume can only influence modes
or programs with a Discrimination audio.
Threshold
The MX 7 can be used in silent search (no sound until a target is detected),
or with a Threshold (steady continuous background hum) with virtually no
difference in maximum detection depths. However, searching with a contin-
uous threshold has the advantage of providing more information regarding
what the detector is seeing. The threshold fading to silence indicates either
a rejected target, or a ground anomaly. By focusing more closely around that
spot, often a good target can be found near trash.
To Adjust Threshold:
During searching simply press up and down arrows next to the Options button
to adjust threshold.
Optionally while in the menu:
1. Press Options and use the up & down arrows to select Threshold.
2. Press + & - buttons to adjust threshold. Threshold level should be as quiet
as possible while still hearing a hum.
3. Press Options to exit, or wait 10–15 seconds for the Options mode to
automatically time out.
Tone Identification or Tone ID
The pitch or audio frequency produced by each target’s display identification
range can be highlighted with differently pitched sounds, called Tone Identifica-
tion or Tone ID.
A specific audio pitch reference for each range provides quick audio ID based
on the pitch of the beep it produces during searching- without looking at the
display.
19

When Tone Identification is in single tone, all accepted metal types produce
the same audio pitch during searching. If the Discrimination is set to reject a
specific target range, that range may not produce a beep of any pitch. Reject-
ed targets often do not produce any tone (silence).
To Adjust Tone Identification:
1. Press Options and use up or down arrows to select Tone ID.
2. Press + & - to select the type of Tone Identification desired.
3. Press Options to exit or wait 10–15 seconds for the options mode to
automatically time out.
Tone ID Settings
1-Tone
• All targets produce the same pitch beep (no tone ID).
2-Tone
• Iron targets produce a low-pitched beep; all other targets produce a high-
er pitched beep.
4-Tone:
• Iron (lowest)
• Foil & Pull Tabs
• Nickels
• Coins (highest pitch)
8-Tone:
• Large Iron (lowest)
• Small Iron
• Foil/ Small Gold
• Nickels
• Pulltab
• Screwcap
• Zinc/Indian Head Penny
• Dime – Dollar (highest pitch)
20-Tone:
• Each of the 20 Display ID segments (discrimination zones) produce their
own uniquely-pitched beep, starting with iron (the lowest pitch) to Silver
Dollars (highest pitched).
Depth Units
The MX 7 can report target depth in inches or metric.
1. Press Options and use Up & Down arrows to select INCHES/METRIC
2. Press + or - to select the units of measure desired.
3. Press Options to exit or wait 10–15 seconds to automatically time out.
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