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Spectra V3i Advanced User`s Guide

1. Quick Reference and Owner registry were cov ered in the previously in this chapter Battery simply reports the current voltage level The Configure menu has some familiar entries Language Metric units Backlight and Loop selection plus a number of additional entries we have not yet covered Advanced User s Guide Expert menu Engish o Metric units sunshine Sound effects Live search screen Live controls Loop selection Mfo Double D D2 Color theme gives you a number of screen color schemes to choose from e Chestnut e Dusk e Fireside e Pine e Sunshine Most programs use the Sunshine scheme In addition to the 5 standard color schemes you will notice that two programs Hi Pro and Mixed Mode Pro are also in the list That s because these two programs have their own custom color schemes There are also entries called Custom and Custom Edit we will cover how to create custom color schemes in Chapter XX The Sound Effects section lets you select options for key clicks and the key limits tone Expert menu Sound effects 1 eee eee ee ee Se ee A A E Key Click is the short tone you hear every time you press a keypad button you can disable it by unchecking the option Tone lets you select the click tone Balance adjusts the stereo bal ance for the effect Key limits is the short tone you hear when you reach an option s limit you can disable it by unchecking the opti
2. Owner registry Owner s Name Name corkyHolcombe Corky Holcombe Bl Boos BHO n cancel Use AW lt P to move around the keyboard press ENTER to type the selected key when you are done pull the trigger switch to exit back to the registry screen Because of the limited keypad on V3i it is difficult to provide an easy way to backspace delete and even move the cursor back amp forth Fortunately there are some key short cuts and a Special Operations alternate to the pop up keyboard While in the pop up keyboard sim ply press VIEW to switch back amp forth between the keyboard and the special ops view Owner registry Owner s Name Advanced User s Guide I1 The first three entries are e Position use the lt and P keys to move the cursor backwards and forwards in the edit window text e Delete the lt and P keys to highlight text in the edit window then press ENTER to delete the highlighted text e Overtype check this to switch the edit mode to overtype mode instead of insert mode These functions operate just like most any computer text editor If you scroll down the special operations selections you will also see entries for the six supported languages Owner registry Owner s Name Corky Name gt a Corky Holcombe At any time you can switch keyboards and enter text in the selected language Finally there are a number of keyboard short c
3. Any error in the ground balance point will result in an error in the target VDI response so it s important to maintain a decent ground bal ance point tT j Page 1 4 i CHAPTER Turn On amp Go Although V37 is highly programmable it includes several factory preset programs which provide good overall performance and allow a new user to quickly start hunting 1 Press ON OFF V37 displays the owner details Gf registered and battery condition scroll down for information about the detector and general features Tip Press ZOOM to change the font size Spectra Voi a product of White s Electronics Unregistered See below 10 04 Volts EE 2 Press MENU The initial six block menu screen lets you easily change basic set tings Select PROGRAMS and scroll down to choose a search program Salt Beach r Relic sns Prospecting Deep Silver C High Trash _ Meteorite k Hi Pro C Mixed Mode Pro A Common oHRestore 2 Getting Started 3 Pull Trigger Squeeze and release the Trig ger on the handle grip V3i is now in nor mal search mode 356 I 1 0 1 30 I i I Programs and Memory V3i has 9 preset factory programs Coin amp Jewelry Accepts most common coins along with rings and jewelry Salt Beach Coin amp Jewelry using salt sub traction mode Relic Mixed mode no Tone ID no VCO Prospecting Optimized for nugget hunting Deep Silver Optimized
4. VDI Tones Flats 30 kee EE i YV DI 93 0 300 i YV DI 92 Tip A setting of 1 is about 5Hz a set ting of 0 produces no tone at all and is equivalent to discriminating that VDI At this point you can go through each of the 191 possible VDIs and set the tone for each one However most people will want to use a iEn eee ee ee Se ee A A E single tone for small groups of VDIs for example one tone for the iron range one tone for a foil range etc There is a short cut for set ting multiple VDIs to the same tone 1 Move to the first VDI in a desired tone range 2 Set the desired tone for that VDI Press hold ENTER then press V to set the same value to subsequent VDIs This works in either direction so you can also start at the last VDI and press A As an example the Mixed Mode Pro pro gram has custom tones set up as follows Tone 240 220 200 180 160 140 120 100 80 95 0 20 40 60 80 95 VDI Notice that the ferrous region 95 to O is compressed compared to the non ferrous side Custom Discrimination In metal detectors discrimination is the process of accepting some types of targets while rejecting others In many designs this is a simple linear adjustment that sets a single rejection threshold In more advanced designs rejection can be selected across multiple dis crete ranges V3i allows discrimination at the individual VDI level and the resu
5. Each time you change the channel you will need to repeat the connect sequence Turning down the Power Level has little effect on battery life so it is best to leave it at 3 Electromagnetic Interference EMI EMI can be a problem with any wide band metal detector whether a multi frequency VLF or a pulse induction design V3i includes a frequency offset to help deal with this Sim ply select the Transmit Frequency item on the Live Control Bar to access the Offset control Transmit Frequenc I Salt Correlate 2 5 kHz Three freq EERE D There are 5 increments of frequency offset with the search coil held in the air find the one for best stability Tip EMI is easiest to hear in pinpoint mode trigger pulled Tip If V3i continues to have erratic audio with the search coil held in the air reduce the RX Gain Menus amp Controls V3i is the world s most configurable metal detector In order to make this detector both user friendly to a new detectorist and to sat isfy the desires of advanced users and tech heads there are 3 ways to changes settings 6 Block Menus Common settings e Live Control Menus Live search settings e Expert Menus Complete settings Advanced User s Guide fF 7 By default when the MENU button is pressed during normal search the 6 Block menus appear These are designed to represent the controls normally found in a high end ana log metal detector Advanced users
6. then pull it back and hold it there This might be in con junction with a key press such as Pull hold the trigger and press ENTER which is the same as Trigger ENTER Layout The V3i interface consists of a keypad and a color screen Below is a picture of the pod face with the default layout for the search screen Icons Target Depth SpectraGraph Backlight Live Control Menus Navigation Keypad tT j Page 1 2 iy TE E T Srar The search screen has four major regions 1 Target information 2 SpectraGraph 3 Status Bar 4 Live Control Bar The target information includes the VDI num ber the depth and icons representing the likely target SpectraGraph displays signal strength versus VDI and gives a detailed look at the VDI response The status bar shows a few operational pieces of information and the Live Control Bar provides quick on the fly access to operating modes and adjustment parame ters All of these will be covered in detail in subsequent chapters The Basics of VLF Operation V3i is a multi frequency MF induction balance IB very low frequency VLF trans mit receive TR metal detector It has more user adjustability than any other detector in the world and in order to understand what all these adjustments do it is important to have at least a rudimentary understanding of how a modern metal detector works Metal detectors work on the principle of in
7. they are controlled separately Bottle Cap Reject The next control is Bottle Cap Reject BCR Bottle caps are difficult targets because as the search coil is swept over them they look both ferrous and non ferrous This can fool the discriminator into deciding on non ferrous and reporting a good target and can be further exacerbated by DD coils BCR controls how aggressively V3i attempts to break up the audio on bottle caps making them produce a distinct chatter A higher BCR setting breaks up the audio more BCR can be fooled by an iron target buried adjacent to a good target and a higher setting can also make faint targets falter as well Set this as low as you can stand Hot Rock Reject Hot rocks are mineralized rocks that usu ally fall in the normal mineralization tracking range but being rocks they have a very quick rise and fall signal response Technically hot rocks have a VDI higher than the current ground balance point while rocks with a lower VDI are often called cold rocks We won t bother to distinguish With Hot Rock Reject HRR turned on when V3i identifies a target as a hot rock it automatically assigns it a VDI of 95 With HRR turned Off no VDI reassign ment is done Normally 95 is rejected so that a hot rock has no audio response However if 95 is accepted then the HRR number controls how the audio is altered More positive numbers increase the audio response negative numbers decre
8. 1t does have more features than any other detector before it and can appear overwhelming Don t be intimi dated Start with the preset programs and go at your own pace There is no need to master all the features to get excellent performance INtrOCUCtION Finally if you need help White s Electron ics is a phone call or mouse click away Your dealer is an excellent resource and the White s web site has a V3i help forum for questions amp answers tips and sharing programs Go to www whiteselectronics com and click on the Forum link Conventions In discussing the features of V3i we will use Arial Bold Caps to distinguish keypad but tons and menu selections For example press ENTER means to press the Enter key on the keypad and select Enable might mean to select the Enable menu option probably by using the arrow keys to highlight it and then pressing ENTER V37 keys and menus work just like a modern computer graphical interface so things are fairly intuitive In some cases you need to use multiple key combinations or combinations with the trigger switch Press MENU ENTER means to press and release the MENU button then press and release the ENTER button But press MENU ENTER means to press and hold the MENU button and while holding it down press the ENTER button Order often matters so MENU ENTER is not the same as ENTER MENU If you find that you have acci dentally pressed the
9. Advanced User s Guide I1 The VDI for salt is around 4 to 5 which is normally the area for bits of foil However very small gold nuggets and some jewelry can also fall in this range which is why V3i has the added option to run a normal 3 frequency with salt subtraction disabled Some users have reported situations where the salt compensate mode helps reduce EMI noise Like normal 3 frequency salt compensate includes the option of calculating target VDI from either best data or correlate Single Frequency With any multiple frequency detector the total transmit power must be divided among the active frequencies V3i offers the ability to transmit only one of its three frequencies In single frequency mode the transmit waveform is optimized to focus power to the selected fre quency resulting in slightly better depth but for a more narrow range of targets Trivia The single frequency modes in White s DFX do not use optimized trans mit waveforms When a single frequency mode is selected you will also see an option called Normalized Transmit Frequency Coin amp Jewelry Three frequency M Frequency Offset o i LLive control The VDI responses for targets vary with frequency which means that a particular target will have completely different VDI numbers at each of the three frequencies For example a US silver quarter has the following raw VDI responses iEn eee ee ee TT E T Sprav 7 5kHz 8
10. Bar high iEn eee ee ee 2 ee A A E light the Disc selection and press ENTER scroll down to the VDI Select By entry which contains four methods for setting up discrimi nation masks Discrimination Coin amp Jewelry Level replicates the simple Disc knob found on many detectors Everything below and includ ing the setting is rejected everything above it is accepted Discrimination Coin amp jewelry T T ae O HEdit ro Selecting IconEdit pops up a small box containing a list of all the currently defined icon ranges We haven t covered icons yet but any given program can have them defined either using factory default ranges or custom ranges Once icon ranges are defined you can accept or reject those ranges in their entirety In the example above the foil ring range is rejected as is the cap zinc cent range The other ranges are accepted Tip This method may seem superflu ous but as an example it allows you to quickly toggle discrimination for the foil region without having to remember what the VDI range for foil is Discrimination Coin amp jewelry Selecting VDI gt Edit pops up a small box which contains a list of VDIs and each VDI has a checkbox next to it This method is iden tical to the pop up box on the Live Control Bar already covered Discrimination Coin amp jewelry H D I Select by EHcon table Selecting Graph gt Edit creates a small dis crimin
11. Metal VCO Channel OP Rx Coil Rx Gain Discrimination Tone Channel ID Disc Sens Clo Basics menu The remaining selections are for setting various user preferences We will cover the modes first then proceed through the various settings not necessarily in the order of the menus V3i Audio Response A Graphical Look V3i has a lot of audio adjustments and some of them tie in with other non audio set tings To help tie together the various settings and better explain them we ll take a graphical look at what s going on Let s start with a block diagram of V3i shown below The Rx Gain setting in the Sen sitivity menu is applied to the raw input signal from the coil The signal is then split into two processing channels one for all metal and one for discrimination and these channels have their own audio responses You can listen to the all metal signal or the discrimination sig nal or both of them combined mixed mode the audio can be sent to a standard speaker a pair of plug in headphones or wireless head phones AM Volume AM Sens AM speaker Mixed Headphones Wireless Disc Headphones Audio Mode Target Threshold Volume tT j Page 4 i TE E T Srav Note that the various settings apply only to one or the other processing channels audio modes It s important to remember which set tings affect which mode and that s not diffi cult once you understand wha
12. There are 191 VDI numbers and set ting each one individually can take a long time There is a short cut when you press the ENTER button to check or un check a VDI continue holding down the ENTER button then press the A or V button to rapidly set a range of VDI s to the same setting Graph The final method of setting up a discrimination mask is by using the Graph When selected the following Edit box becomes available Discrimination Coin amp jewelry H D I Select by EHcon table ee eee eee ee ee Se ee A A E The displayed number shows the VDI number you are editing Also shown are the icons that Discrimination Coin amp Jewelry are set for that VDI Use the lt and P buttons V DAPUR KAMARE carad to move left and right through the VDI range of ims and the A and V buttons to accept and reject respectively the selected VDI EW DI Select b Tip As with the prior VDI edit method there is a short cut when you press ORelic the Aor W button to check or un check Prospecting a VDI continue holding the button then press the lt or gt button to rapidly set a range of VDI s to the same setting There are three pre defined icon tables for Park Relic and Prospecting These are shown The final entry in the Discrimination menu in tables below There is also a Custom selec is the Icon table It 1s as follows tion for setting up your own icons This is cov ered in detail in Chapter XX Preset Ico
13. above for options Stereo Mixed Mode e Select Threshold Tone ID Modulation and VCO mode or not e See above for options e Select the Balance method to determine which side is all metal and which side is disc audio e Adjust the audio boost to a comfortable level 8 1s recommended jt j Page 4 11 i CHAPTER V3i is the only metal detector with fully customizable audio and discrimination This chapter will cover the methods for setting up custom audio tones and discrimination masks Because both the audio responses and the discrimination settings are based on VDIs it will be useful to review V3i s VDI scale In terms of raw signals VLF detectors attempt to identify targets based on their phase response But different frequencies result in different phase responses for a given target so the VDI scale was created to present a normalized response such that detectors of different fre quencies would have consistent outputs That way users don t have to remember a lot of dif ferent response scales The White s VDI scale see Chapter 1 for prior discussion is based on a 6 192kHz scale Ferrous lt 0 Non Ferrous 05 al ys auett Negative numbers generally represent ferrous iron targets positive represents non ferrous This can be redrawn in a linear fashion Soil Nail Salt 5c US 25c 95 Ferrous 0 Non Ferrous 95 1 VDI stands for Visual Discrimination Indicato
14. detector including four audio modes and complete user customization Because of the extent of the audio system and the number of options it will be presented in its own chapter Discrimination A primary mode of practically all detectors since the 1970 s has been discrimination V3i is no different Discrimination of course allows us to accept or ignore certain targets based on their phase or VDI response In analog detectors this is accomplished with a knob that sets the threshold point of discrimi nation everything below the threshold is rejected and everything above is accepted Modern digital detectors take discrimina tion to a higher level allowing the user to accept and reject narrow VDI regions While V3i has a discrimination resolution down to the single VDI number there are several ways to set up the discrimination The basic Discrimi nation menu is Discrimination Coin amp jewelry M Bottle Cap Reject or lt _ lt lt lt lt H D 1 Select by EHcon table Visual Reject Visual Reject is a preference setting for dis playing rejected VDI numbers If it is un checked then the VDI numbers for targets which are discriminated out will still be dis Advanced User s Guide I1 played If you don t want to see the VDI num bers of rejected targets then check this option This option does not alter the audio response or the SpectraGraph response for rejected tar gets
15. electric fences including invisi ble dog fences It is best to try to have them switched off when hunting The frequency offset applies to all active frequencies If you have a single frequency mode selected then the offset shifts that fre quency If you are in a 3 frequency mode the offset proportionally shifts all the frequencies When making offset adjustments put V3i in pinpoint mode by pulling the trigger and watch the pinpoint bars like this MEAN ATAF EE Salt Correlate 2 5 kHz Along with the audio the pinpoint bars will help you find the quietest offset In some situa tions you may not be able to find a quiet offset for all three frequencies at the same time Pay attention to the pinpoint bars and see 1f one of the frequencies tends to run quieter than the others If so run in single frequency mode with the proper offset A stable single fre quency mode is usually better than an unstable 3 frequency mode iEn a TEE E T Spectra va Ground Balance In Chapter 1 we briefly covered how ground balance works and how automatic tracking can compensate for varying ground conditions V3i offers both automatic tracking AutoTrac mode and the ability to lock the ground balance when needed LockTrac Whether you are using AutoTrac or Lock Trac it s important to know how to check if V3i is properly ground balanced As you are hunting test the ground balance occasionally using these steps lift the l
16. for deep silver Meteorite Accepts most iron High Trash Fast recovery response for bet ter trash separation Hi pro Advanced Coin amp Jewelry Mixed Mode Pro Advanced features includ ing Stereo mixed mode These programs are designed for good perfor mance under most conditions and provide an excellent starting point However ground con ditions vary considerably so some adjustments may be necessary Changes to factory pro iEn a TE E T Serar grams as well as completely new custom pro grams can be saved to memory and recalled at any time Saving and restoring programs is covered in the Expert portion of this manual Manual Ground Balance V3 s automatic ground balance system has a fast track mode that attempts to balance the system to soil conditions within 20 seconds of turn on If you do not begin searching within 20 seconds or the ground is unusually trashy V3i may not fast track correctly and you may want to do a manual ground balance e Squeeze hold the Trigger then press hold ENTER e Pump the search coil over the ground 1 12 inches until the background hum becomes steady usually 4 to 6 times Make sure you do this over an area free of targets e Release ENTER then release the Trigger and begin searching Tip If you release the trigger before releas ing ENTER V3 will lock the screen to pin point mode Simply pull the trigger twice to search This manual ground balan
17. individually V3i has the ability to deal with a wide variety of conditions iEn eee ee ee
18. its own In pin point mode SAT is not applied so you can hold the search coil steady over a target and the response will remain steady In this channel the All Metal Sensitivity set ting is basically an additional gain setting applied to the all metal signal above and beyond the Rx Gain setting The following graph shows a signal with both a low setting black trace and a high setting gray trace The higher sensitivity setting improves target signals but it also increases the amount of audio noise and can make V3i more chattery This is especially true when EMI is present All metal audio can be presented in one of two ways VCO and non VCO This selection is found at Audio gt Search Audio All Metal VCO Audio Coin amp jewelry Search Audio _H4 Discrimination Ha Mixed Mode _H Stereo Mixed HPinpoint Audio Ohiireless Headphone tLive controls iEn eee ee ee TE E T Sprav If VCO audio is disabled then the all metal audio response will be a fixed tone and an increasing signal level creates an increase in its loudness Increasing Volume 7 Fixed Threshold Tone In other words as the search coil is passed over a target the all metal audio will begin at a low volume and progressively rise in loudness as the target signal gets stronger peaking when the search coil is directly over the target If VCO audio is enabled then an increasing signal level creates a rising audio to
19. kHz Sizing screen contains the VDI number icons and depth the middle has the same Status Line and the Live Control Bar is at the bot tom Instead of the SpectraGraph display there is a Sizing display which when the coil is swept over the target a single time produces a graph of the sweep response of each frequency See the Chapter XX for more information on how to read this display Pinpoint mode Pinpoint mode places V3i in an all metal mode and displays the Pinpoint screen Again this screen has the depth but no VDI or icons Status Line and Live Control Bar The Pinpoint display consists of 3 horizontal mov ing bars which give the relative signal strengths of the three frequencies This can be used to precisely pinpoint the target and to see which frequency is giving the strongest response See the Chapter XX for more infor mation on how to read this display Tip To lock V3i in Pinpoint mode pull and hold the trigger press and hold ENTER release the trigger and release ENTER V3i will stay in Pinpoint mode until you double pull the trigger ge a a a CHAPTER This chapter covers some of the basic set tings of V3i including sensitivity discrimina tion audio and ground balance It does not cover any settings which alter the fundamental operating mode of the detector See Chapter 4 for operating modes Sensitivity Once you select a basic program you may need to adjust the sensitivity sett
20. looks like UU LUE Wu UUL The received composite waveform and its three frequency components look like this a a tT j Page 4 i TE E T Spectra v3 Three Frequency The default frequency mode for V3i is standard Three Frequency In this mode V3i simultaneously transmits 2 5kHz 7 5kHz and 22 5kHz 3 frequency mode gives the best overall response to the broadest range of target conductivities In any frequency mode V3i will plot the VDI responses in the SpectraGraph screen and also calculate an overall VDI number for the target Under the Three Frequency selection you will see an additional selection for the VDI calculation method Transmit Frequency Coin amp Jewelry Three frequenc Best Data Correlate M Frequency Offset GLive control Best Data means that the VDI is taken from the strongest responding frequency Correlate means that the results from at least two responding frequencies must agree in order to display the VDI number Factory programs default to Best Data as this typically offers good VDI accuracy Salt Compensate Salt Compensate mode is the same as Three Frequency mode except that salt responses are subtracted out This eliminates salt signals while still allowing V37 to track ferrous mineralization This technique is only possible in multi frequency detectors which is a second reason to use multiple frequencies Trivia White s DFX is always in salt com pensate mode
21. until you are done then press ENTER to engage what is now the STOP button If you are only connecting to a single WHP then select Single and V3i will also read back the battery voltage as well as the version of software in the WHPs Single also has a Speaker option which when selected auto matically switches audio over to the speaker if the WHP battery dies or the WHPs are turned off Wireless Headphone Working HeSingle Monitor battery Version 1 1 2 72 Volts Speaker Multiple headphones iEn eee ee ee TE E T Sprav Summary A lot of material has been covered and a sum mary will help reinforce what we ve covered Select the Search Audio mode you want Discrimination e Select Threshold if you want an audible threshold or not for silent search e Use Fixed Threshold to set the all metal tone Select Tone ID if you want multiple tone responses or not for single tone responses e Select the VDI Tones method to use see Chapter XX for details Select Modulation if you want the target response loudness to vary with signal strength or not for all loud responses e Use Range to set the variation in loud ness Advanced User s Guide fF 7 All Metal e Select VCO mode or not e For VCO mode use VCO Threshold to set the base VCO tone e For non VCO mode use Fixed Threshold to set the all metal tone Mixed Mode e Select Tone ID Modulation and VCO mode or not e See
22. will reset the menus and put you at the top upon re entry Quick Reference has a check box option called Topics which when selected enables the hypertext links to other topics Uncheck this option if you don t want the hypertext links Battery has the following options Expert menu Loop selection fio Double p D2 Alkaline Auto Power Off With Battery type you can select which battery pack you are using and V3i will slightly tweak the battery graphic on the splash screen How ever for most people this is not an important consideration so leaving the battery type set to a single entry is fine Auto Power Off when enabled will auto matically shut down V3i after a period of inac tivity The inactivity time is set by Inactive Limit which is in minutes Activity is defined by a key click or a trigger pull not just screen activity Therefore it is possible to hunt for an extended period of time where if you never use the pinpoint trigger V3i could auto shutdown You will know when this happens because it plays a short piece of our interprre tation of Beethoven s Sth iEn a TE E T Sprav The V3i Keyboard Editor The owner registry requires that you create text entries and there are other features in V3i that also require text entries V37 includes a pop up keyboard editor When a text entry is active such as Owner s Name in the Owner Registry screen press ENTER to access the editor
23. 0 09 53 58 RevD AMD Unregistered Your name and contact information will appear here after registering Owner registry is for personalizing your V3i with name and contact information in case your detector is lost or stolen It does not regis ter the detector for the purposes of warranty If the screen has Unregistered in red then the detector has not been registered Press the TAB button to highlight the Register button then press ENTER At this point you will see a screen with a 4 character password Serial number VaEngx 000 000 000 Password ass Record this unit s factory supplied password and serial number in a safe place The password will not be visible after registering If you choose to Continue registration you MUST write down this password if you ever want to change the registration in the future this password will not be shown again How ever you can opt to bail out of the registration process by TABing to the Cancel button or simply pulling the Trigger switch Assuming you have chosen to continue and you wrote down the password TAB to Continue and press ENTER Here is the next screen Advanced User s Guide I1 Owner registry Owner s Name You may now enter your name press TAB and enter your contact details Use the A and V keys to select characters and the lt and gt keys to move backwards and forwards in the edit window You may also press ENTER to access the V
24. 3i Keyboard Editor which is cov ered in detail in the last part of this chapter Tip Contact details may contain multi ple lines created by using a semico lon 1011 Pleasant Valley Rd Sweet Home OR 97386 541 367 6121 A completed registration screen might look like this Owner registry amp Notices ul 12 2010 09 53 58 RevD AMD Owner Corky Holcombe 1011 Pleasant Valley Rd Sweet Home OR 97386 541 367 6121 Tip Should you decide to transfer your V3i to another owner be sure to give them the registration password so they can replace your information with theirs If you have misplaced the pass word you not the new owner will need to contact the factory to get it reset ge a a TTE E T Srav Expert Menus Finally we have reached the Expert Menu selection and selecting it get the following screen Expert menu HProgram Discrimination Sensitivity haudio Frequency hGround Tracking HFilter amp Speed hConfigure Hnformation Many of these are recognized as topics we have covered in previous chapters but the Expert Menu categories may have additional settings The only parts of these menus we will look at in this chapter are the Configure and Infor mation sections If you expand the Information section you will see Expert menu GhAaudio Frequency hGround Tracking HFilter amp Speed eonfigure OhOuick Reference OOwner registry Battery 11 37 Volts
25. 5 By checking Normalized all VDP s will be nor malized shifted to a common frequency That common frequency is for historical reasons 6 592kHz meaning the US silver quarter will have a normalized VDI response of 83 With Normalized unchecked V3i will report the raw VDI numbers for the frequency mode selected There is at least one situation where this is an advantage At 22 5kHz the lower part of the non ferrous VDI range is expanded resulting in more numerical separa tion of low conductive targets This can help in separating nickels and jewelry from pull tabs Here is a table showing the difference in nor malized versus un normalized VDI s for a number of targets Un normalized VDI Taer Tomma 8 e eT Normalized VDI 63 22 e sso Pwes s j e This shows there is a significant expansion of the VDI range up to nickels while the upper Advanced User s Guide I1 VDI is actually compressed The opposite occurs at 2 5kHz the upper VDI range is expanded at the expense of the lower Frequency Offset This is not a mode but rather an adjust ment control It was discussed in Chapter 3 The Frequency Offset control provides slight offsets 5 steps to the selected frequency ies and is useful to minimize EMI especially when hunting near other detectorists In general adjust the offset up or down to find the quietest setting One source of EMI that is difficult to deal with are
26. CHAPTER White s V3i represents the latest technol ogy in metal detecting The heart of V3i is a high performance ARM 9 RISC microproces sor which simultaneously analyzes signals from 3 transmitted frequencies Those frequen cies 2 5kHz 7 5kHz and 22 5kHz were chosen for their diverse responses to a variety of metal targets resulting in a superior system of target analysis and identification The face of V3i is a stunning 320x240 color display with an easy to use menu driven interface Along with three frequencies there are three search modes and five analysis screens which provide more detailed target information than has ever been available before With a level of simplicity for the nov ice user and a depth of configurability that will satisfy even the most advanced user V3i 1s a metal detector for everyone This manual is organized to provide pro gressive information a format that attempts to minimize information overload If you are a new detectorist the Quick Start chapter will allow you to get a quick jump on using V3i Then as you run across new features and want to find out more continue reading the manual to get progressively detailed information If you are already familiar with high end detectors especially those with a menu inter face you might want to read over the Quick Start chapter to get a feel for V3i s features V3i s graphical interface makes the rest easy While V37 is easy to use
27. This screen lists all the VDI numbers from 95 to 95 each with a selection box A box that is X ed enables that VDI response an empty box disables that VDI This is the pri mary method of setting up the discrimination pattern for V31 Discrimination settings Or D 1 Accept VDIAccept a oJ off ga vai 5 Vdi 4 off me E ei 3 AI otr f Yadi 2 W Vdi 1 weli 1 Selecting Disc from the Live Control Bar gives you this Again this is a scrollable list of VDI s in which you can individually enable X ed or disable their response Other settings will be covered in subse quent chapters Frequency ridding Selecting Frequency from the 6 block menu gives this screen Frequency m Transmit Frequency Coin amp Jewelry r D I CSalt compensate M Frequency Offset Et es Se GLive control The only control we will cover in this chapter ee eee ee ee TE E T Sprav Transmit Frequenc Three freg CETHE Salt Correlate 2 5 kHz is Frequency Offset See Chapter 4 for discus sion about frequency modes The Frequency Offset control provides slight offsets 5 steps to the selected frequency ies and is useful to minimize EMI especially when hunting near other detectorists In general adjust the offset up or down to find the quietest setting The Live Control Bar version of this con trol above makes finding the quietest offset easy Select Transmit Freque
28. When you follow this procedure the WHPs will produce a pair of ta DA jingles the first signifies power on the second signifies proper connection Upon connection V3i will pop up another balloon signifying that Wireless Headphone Connected HEN level 2 75 Volts k R 7 rsion 1 1 Headphone connected Release headphone power button Why is there a connect ritual It s because the WHPs may need to search for and find the right channel to operate on With the Channel control V3i lets you select one of 76 channels 4 79 allowing multiple V users to operate in close proximity By default channel 4 is selected both in V3i and in the WHPs So right out of the box you can probably turn the WHPs on and they will work fine But if you change the channel in V3i then the WHPs need to know that hence the connect sequence If you never change channels you should never need to connect just turn them on and go iEn eee ee ee TT E T Sprav Tip There are 3 ways to tell if you need to run the connect sequence once the WHPs are turned on One look at the search screen the WHP icon will have a red slash through it if the WHPs are not properly connected Two look at the title bar of the WHP menu if it says Working then the WHPs are connected If it says Off then they are not connected Three look at the battery voltage report in the WHP menu if it says not respondin
29. all metal channel requires loop motion or the target will get tuned out but pinpoint does not require loop motion Pinpoint audio has the following options Audio Coin amp jewelry Target Volume rAudio Threshold Tone EFSearch Audio Pinpoint Audio HYCO FRatchet DH4fireless Headphone tLive controls VCO is the same as with the all metal search mode and shares the same VCO Threshold and Fixed Threshold settings depending on whether VCO is enabled or disabled Rachet is an method whereby the pinpoint audio 1s automatically narrowed on successive sweeps of the target Many detectorists do this manually during pinpoint by resetting the pin point trigger switch to desensitize the target response which has the same effect as creating a narrower audio response as the coil is swept across the target This significantly helps zero in on the target especially shallow ones An illustration of rachet pinpointing is as follows Sweep Left Cm Sweep Right Cum Sweep Left C Tip When rachet pinpointing either manu ally or automatically the target can dis appear if you over rachet then slightly raise the loop Speaker and Headphones V3i provides three ways to listen to audio e Speaker e Plug in headphones e Wireless headphones There are obvious limitations in using the speaker None of the left right balance controls do anything and Stereo Mixed Mode will not work properly The
30. ase it Setting HRR 0 means the audio is not altered iEn eee ee ee TE E T Sprav VDI Select By Discrimination Coin amp Jewelry Y Hot Rock The next item in the menu VDI Select By is where the discrimination is set There are four ways to set up the discrimination Level This control works just like the traditional dis crimination knob on an analog detector Every thing below and including the setting is rejected everything above the selection is accepted Icon Discrimination can also be set to accept or reject predefined icon ranges Icons can be user defined to certain VDI ranges such as a US nickel to 18 to 23 see Chapter XX Then using VDI Selected By Icon that icon range can be wholly accepted or rejected When this method is selected an Edit box becomes available and each icon range is listed with a check box A checked range is accepted an un checked range is rejected The Edit box looks like this Discrimination Coin amp jewelry y Al off j Icon Accept yr gor ae a a ig Ga T Ed Advanced User s Guide I1 VDI The most detailed method of setting the dis crimination mask is by individual VDI num bers When this option is selected the following Edit box is available Discrimination Coin amp Jewelry Vdi 5 JEJ Ydi 4 Each VDI number is listed with a check box a checked VDI is accepted an un checked VDI is rejected Tip
31. at VDI 95 and end ing with tone 255 at VDI 95 The tone vs VDI response would look like this 255 Tone 160 65 VDI 95 0 95 Shifted assigns one tone to all negative VDI numbers and increasing tones to every positive VDI number This mode adds two selections Audio Coin amp Jewelry M Overload tone Negative tone VDI lt 0 Reference tone DI 0 2140 _ _ Custom Negative tone lets you select the tone that is used for all negative VDIs Reference tone lets you select the tone that corresponds to VDI 0 the tones will then increment with each sub sequent positive VDI For the numbers above the tone vs VDI response would look like this Tone 255 214 120 95 0 41 95 VDI Notice that tones increase from 214 VDI 0 up to 255 VDI 41 and then remain at 255 for all higher VDIs That s because 255 is the highest tone setting Tip When any tone selection slider is active you can hear the tone by flip ping the trigger switch forward Finally we get to the fully custom tone mode Custom offers a single additional selec tion Edit Audio Coin amp jewelry Target tone Overload tone HDI Tones Standard Shifted Ghsearch Audio Pinboint Audio Selecting Edit pops up a small window which contains a list of VDIs and each VDI has a slider for selecting a tone number from 0 to 255 roughly 5 Hz to 1000 Hz Audio Coin amp jewelry
32. ation mask graph that you can visually edit The large number represents the current VDI at the cursor the T arrow the symbol below the cursor tells acceptance _ M_ or rejection UL for the current VDI the icons show what icon range is currently active per the defined icon ranges Use the lt and P keys to move along the graph and the A and V keys to set acceptance amp rejection As before you may press hold the ENTER key and drag a selection for faster editing iEn eee ee ee CHAPTER So far everything we ve done has been accessed from either the 6 block menus or from the Live Control Bar A lot of features are available at these levels but as we move into more advanced features we will need to begin accessing the Expert Menus The Expert Menus are the third level of the user interface after the 6 block menus and the Live Control Bar Every setting for V3i bar none can be found here Info Configuration Screen Before we jump to the Expert Menus let s take a look at the Information Configure screen which we have to pass along the way Press MENU MENU twice this will take you to the Configure screen Information Configure Language ajengi L Metric units Backlight Loop selection fio Double p D2 OOuick Reference 11 25 Volts O Expert menu The first selection is for Language V3i supports 6 languages English Spanish French German Russian and Turkish All operational scr
33. av Audio Coin amp jewelry Fixed Threshold VCO Threshold Target tone Overload tone results in no tone e Fixed Threshold This setting is the tone that will be used for the background threshold in the discrimination audio as well as the all metal threshold when VCO mode is disabled A value of 195 matches the frequency used in older White s detectors e VCO Threshold This is the tone that will be the starting point for the all metal response when VCO mode is enabled Tip The Mixed Mode Pro program uses an unusually low threshold tone coupled with an equally low VCO threshold to give it a BFO like growl response e Target Tone This is the frequency that will be used for the discrimination target response when Tone ID is disabled single tone response See Tone ID below e Overload Tone When an unusually strong target response overwhelms the receiver circuitry V37 will emit an overload tone determined by this set ting e VDI Tones If Tone ID is enabled then this selection specifies how tones are determined for the dis crimination target response See Tone ID below Advanced User s Guide I1 Tone ID Any modern discriminating detector has at least a rudimentary audio method of distin guishing accepted targets from rejected ones This may be as simple as an audio response for accepted targets and no audio response for rejected targets More advanced detectors have a tonal identificati
34. ce sequence can be done at any time during normal search Once the initial ground balance is completed V3i will automatically track to most typical ground mineral changes Tip If V3i seems to have an erratic audio only when sweeping the search coil on the ground check the ground balance Advanced User s Guide fF 7 Wireless Headphones If you purchased V3i with wireless head phones WHP then do the following to enable them e Turn on your WHP you should hear a turn on tone ta DA e Press MENU select Audio e Scroll down and select Wireless Headphone e If the Enable box is unchecked the press ENTER to check it You will see multiple options appear Wireless Headphone Working If Monitor Battery reports a voltage then the WHPs were recognized and are working If instead it reports Not responding then the WHPs were not recognized Try cycling their power If this does not work you will need to do a connect sequence Simply TAB to the connect button and press ENTER You will see Wireless Headphone Waiting pe Power lewel ULC S Waiting for headphone Press and HOLD headphone power button Press to cancel Press hold the WHP power button until it con nects iEn a TE E T Seira By default WHPs are set on Channel 4 and Power Level 3 If there is excessive interfer ence and especially if you are hunting near another V3 V3i user you may need to try a dif ferent channel
35. cking Many locations have enough mineraliza tion to create quite a strong ground signal often much stronger than that of a moderately deep target The VDI dia gram on the preceding page uses vec tors to represent specific target responses with the angle of the vector representing the VDI value We can also use the length of the vector to rep resent the strength of the target 95 Advanced User s Guide fF 7 response so that a strong ground and weak quarter response would look like The detector will see both signals at the same time and the combination of the two can be represented with a third vector as follows ter ak Quar ve 95 The resulting signal appears to be a fairly strong ferrous target instead of a quarter This is the downfall of the old TR discriminator designs Fortunately since the VDI response for ground is usually far away from the response of desirable targets there are ways to deal with it In a modern VLF motion discrim inator the receiver determines what part of the signal is the ground response and using spe cial filter techniques normalizes the whole VDI scale to the current ground signal result ing in the ground signal being ignored Graphi cally this looks like quartet Neak qr 95 New Origin 1 In this manual we ll refer to the signal resulting from ground mineralization including salts as the ground signal or the ground response
36. ction also a eee ee ee Se ee A A E has an option for enabling and disabling the threshold tone Audio Coin amp jewelry H5earch Audio HJ Threshold Tone Id Modulation M Range I i CHA All Metal Ha Mixed Mode _H Stereo Mixed This selection also affects the all metal thresh old tone including pinpoint mode Tip Silent search can also be achieved by setting the Audio Tone Fixed Threshold tone to 0 but this will also kill the non VCO pinpoint tone which shares this set ting Target Volume AudioTarget Volume adjusts the volume for the target response that is the target beep in discrimination mode V3i has separate adjustments for speaker standard headphones and wireless headphones Audio Coin amp jewelry Target Volume M Plug in Headphone 400 it MWireless Headphone The Target Volume setting cannot be less than or equal to the Audio Threshold setting or targets will not be heard V3i attempts to main tain a minimum 8dB_ loudness separation between them That is if you try to increase the Audio Threshold setting too close to a cor responding Target Volume setting the Target Volume will automatically increase in order to maintain an 8dB loudness difference As with Audio Threshold the balance con trol adjusts the left right balance in stereo headphones which allows you to compensate for hearing imbalance The one control affects both types of headphones I
37. d to certain operational modes and can be pro grammed differently and even have different screen displays This section briefly describes the default modes and their screens A more detailed discussion of display modes is given in Chapter xx Search mode Search mode is the normal display mode for V3i By default it shows a 3 frequency SpectraGraph Along the top of the screen are the VDI num ber icons and depth The majority of the screen consists of the SpectraGraph display which provides real time information on the target s VDI See Chapter XX for more infor mation on how to read this display 1 Some factory programs run in single fre quency mode so they will display a single frequency SpectraGraph iEn eee ee ee a TT J species viv advanced User s Guide Below the SpectraGraph is the Status Line which contains icons for the status of wireless headphones backlight and transmit boost In the middle of the Status Line the name of the active Program is displayed and is occasion ally overwritten by the ground tracking status At the bottom of the Search screen is the Live Control Bar which gives instant access to the most common settings while V37 is operat ing Analysis mode The Analysis display mode offers an alter nate way to analyze the target In most pro grams this mode is set up to display the Sizing screen Like the Search screen the top of the Signals 5 kHz 7 5 kHz 22 5
38. d anomaly The tracking Speed selection adjusts the rate at which ground tracking is allowed to change A faster speed higher number is use ful for ground that varies a lot over short dis tances but can also be more subject to errors especially in high trash areas Generally use the lowest setting your ground allows How do you determine a proper track speed Occasionally check the ground balance using the test several paragraphs back If you find that the balance is often off then increase the track speed However if V3i seems to be noisy as the loop is swept over the ground and you re sure it s not due to targets then the track speed may be too high Some users prefer to use a slight amount of offset in their ground balance If the Offset control is set to the positive side then a prop erly ground balanced detector will still give a positive response to mineralization If the Off set control is set to the negative side then a properly ground balanced detector will have a null audio response to mineralization The latter is usually undesirable because it can mask faint target responses Conversely giv ing the ground balance a little bit of positive offset can prevent masking The default setting is Q tT Page 4 4 i TE E T Sprav LockTrac There are some uncommon situations where AutoTrac does not work well In extreme ground that has a lot of variability or when a lot of trash targets are pres
39. dent James Garfield He failed not enough sensitivity Ever since then more sensitiv ity has been the goal of every detector Non Ferrous iEn eee ee ee TE E T Sra The ability to separate targets by VDI is what allows a detector to discriminate Targets with a negative VDI are usually ferrous and targets with a positive VDI are usually non ferrous Small gold tends to have low VDI s while thick silver coins have high VDI s Other targets like cupro nickel coins brass and bronze relics and aluminum trash can have wildly varying VDI s depending on their alloy size and thickness This means you need to apply your own discriminator your brain in deciding what the VDI responses are telling you We ll take a closer look at VDI responses but first let s look at Ground Response Unfortunately buried metal is not the only thing the detector sees Most soil contains fer ric oxide minerals and this mineralization looks like a target In terms of VDI practi cally all ground mineralization falls in the extreme negative range of the scale even beyond most iron targets But it can vary somewhat as shown by the gray range in the diagram At most locations the variation is small so you can ground balance at a particu lar spot and be very close for the entire area Some locations have significant variations and you should occasionally re ground balance as you hunt or use automatic ground tra
40. duction discovered by Michael Faraday in 1831 The typical induction balance metal detector uses a transmit coil to produce a magnetic field and this magnetic field in turn Ferrous 4 Normal soi O 4 95 Advanced User s Guide fF 7 produces a small reaction in nearby metal tar gets A receive coil is used to detect this small reaction A so called induction balanced coil arrangement prevents the receive coil from being overwhelmed by the transmit signal allowing it to see very small target signals Phase amp VDI Practically all VLF IB detectors operate as phase discriminators The received signal is converted to phase and the phase is a strong indication of what the target might be The par ticular phase of a target can vary with the fre quency of the transmitted signal so different detectors designed to use different frequencies can report completely different phase results To keep users from having to learn all these different phase response scales White s has chosen to normalize them all to a standard VDI scale Therefore a US nickel detected with a 6kHz detector will have the same VDI as with a 15kHz detector For historical reasons the standard VDI scale is based on a 6 592kHz detector The standard VDI scale is shown below 1 The first practical metal detector was an induction balance design built by Alexan der Graham Bell in an effort to locate an assassin s bullet lodged in US Presi
41. eens for V3i have been trans lated however all Quick Reference screens are English only Next selection 1s for Metric units Check this if you want depth readings reported in cm instead of in Into Contig exoert Menus The Backlight slider adjusts the screen backlight brightness from OFF to 20 V3i uses a transflective LCD screen which has good visi bility and contrast in full sunlight so the back light should not be needed in normal daylight hunting If you are going in and out of shade then a low backlight setting may be needed Keep in mind that a higher setting draws more juice from the batteries Loop Selection allows you to tell V3i which loop you are currently using V37 will use this to adjust target depth readings to com pensate for loop size If you are using an after market loop select the factory loop that is closest in size We ll skip Quick Reference and Owner reg istry for a second and point out the Battery readout If the batteries get below a critical voltage V3i will simply shut down Exactly where this occurs can vary between machines but it could be as low as 4 5 volts however there is no guarantee that V3i is performing well with this low of a voltage Typically 12 volts is fully charged and around 8 volts or so you should be thinking about replacing the battery pack Any White s 12V slide in pack will work NiMH NiCAD or alkaline As the voltage drops below 8 volts all current setti
42. ent auto matic tracking may result in excessive noise and tracking errors High levels of electromag netic interference can also cause problems with automatic tracking In these situations locking the ground balance at one value may provide better performance Keep in mind that when tracking is locked V37 will only be prop erly ground balanced for one type of ground As the ground varies there will be errors in the balance point so there may be some compro mise in depth But LockTrac may allow hunt ing an area where AutoTrac does not The selection screen looks like this Ground Tracking Coin amp Jewelry Soil type Norm GLive control The only parametric setting is for Offset which is identical to the Offset control in Auto Trac In LockTrac using a slightly positive offset can help compensate for variations in mineralizations and keep the balance point from going negative Soil Type V3i includes a 3 frequency mode called Salt Compensate which literally subtracts the signal response from salt This technique won t work in single frequency mode so a dif ferent method is included to allow the use of single frequencies in wet salt sand V3i includes a Soil Type selection for choosing a Normal or Salt tracking range Advanced User s Guide I1 Ground Tracking Coin amp Jewelry feHH Autotrac CHal Locktrac Tl GHLive control As explained in Chapter 1 ground tracking is normally restr
43. es It applies the all metal response to one ear and the dis crimination audio to the other ear This method gets around the hardware limitation mentioned before so that both audios are continuous All metal Audio Discrimination Audio SF Because the all metal response is present throughout the discrimination response target separation and pinpointing is further improved beyond the standard mixed mode audio Tip In Stereo Mixed Mode the Balance controls found in Target Volume and Audio Threshold have no effect Stereo mixed mode has several settings that are largely the same as we have seen in the ee ee eee ee ee Se ee A A E all metal and discrimination modes with the addition of two new options Audio Coin amp jewelry HtThreshold Hone Id Modulation AED Metal Disc M Audio Boost is i cK See the previous sections for descriptions of Tone ID Modulation and VCO Balance lets you choose which audio goes to which ear Audio Boost compensates for the loss in appar ent loudness when a given audio signal is applied to only one ear instead of both ears Pinpoint Mode Although technically not one of the four major search audio modes pinpoint audio could be used for searching if you pull and hold the pinpoint trigger switch Pinpoint audio is identical to all metal audio with one exception all metal has SAT applied to it and pinpoint does not That means the
44. et Volume or just Volume sets the audio volume level for target responses the beeps Audio Threshold or just Threshold sets the volume level for the threshold tone which 1s the constant hum heard in the absence of a target In these menus both target amp threshold volumes are applied to the audio output you are currently using speaker wired head phones or wireless headphones If for exam rege a Se ee A A E ple you set the volume while using the speaker then plug in a pair of headphones you may need to readjust the volume for the head phones The advanced Audio menu includes individual settings for all three audio outputs The Tone submenu allows you to change the individual tone frequencies We ll cover this in more detail in Chapter XX The Tone ID selection allows you to turn on off the multi tone target response system By default Tone ID is turned on in the factory programs The Wireless Headphone selection lets you enable and disable wireless headphone use plus set options This is covered in Chapter XX Discrimination Selecting Disc from the 6 block menu gives this screen Discrimination settings OF D I Accept k Bottle Cap Reject i oft im Ground filter f10 0Hz Band pass For now we will only cover the first item The V D I Accept menu item can be used to enable and disable target responses for individual VDI numbers Selecting this option pops up the next screen
45. g then WHPs are not connected Multiple channels are provided for dealing with noise and interference from other V3i users If the WHP audio seems excessively noisy cutting in and out or you seem to be picking up audio from another V3i try a differ ent channel Pay attention to the reception bar when selecting a channel choose a channel that has a maximum green and minimal red response Tip If you run the connect sequence at the same time as another nearby V3 V3 user you may inadvertently connect your WHPs to the wrong detector The next control is Power level which sets the RF transmit power A high setting may interfere with another V3 V3i user on the same channel and a low setting may cause the sig nal to drop out especially in high EMI We recommend leaving it high and using different channels to avoid interference V3i gives you the option to synchronize to single or multiple WHPs Multiple is useful for training purposes Select the Multiple head phones option then TAB to the Connect button Advanced User s Guide I1 and press ENTER You will get the usual pop up balloon prompt to press and hold down the WHP power button But once the first WHPs are connected V3i will prompt you again Wireless Headphone Waiting Next Power level is E Single Monitor battery Multiple headphones Next headphone Press and hold headphone power button Press when done Continue connecting WHPs
46. he quality of the null which can require a lower Rx Gain EMI affects the lower end of the signal range which more directly impacts target sen sitivity Both ground signal and loop null affect the upper end of the signal response range which usually results in a quicker overload Ground signal and loop null affect target sensi tivity only so far as the Rx Gain must be reduced to prevent overload Tip Always address EMI noise by first adjusting the transmit frequency offset See the Frequency section for more info iEn eee ee ee TE E T Spectra va All Metal Sensitivity All Metal Sensitivity sometimes called DC sensitivity determines the responsiveness of the all metal channel Only target signals above the threshold cause an all metal response and a higher all metal sensitivity set ting will increase the all metal audio response rate to targets This setting affects all metal modes including pinpoint and mixed mode but does not affect normal discrimination mode Setting this too high will make the all metal audio chatter See Chapter XX for a more detailed discussion of audio responses Discrimination Sensitivity Discrimination Sensitivity sometimes called AC sensitivity determines the respon siveness of the discrimination channel This is a threshold level so only target signals above the threshold cause a discrimination response Setting this too high will cause noise and fals ing in the discrimination audi
47. icted to a region of VDI s where mineralization is found However we can open up this range to include salt so that V3i will ground balance in any combination of salt and mineralization This technique does not work as well as true salt subtraction but does allow the practical use of single frequen cies in salt environments In some areas such as mineralized beaches there can be extreme variations in the compos ite ground VDI in very short distance such as swinging over black sand streaks or across the transition to wet salt sand It may be necessary to increase the tracking speed to deal with this One of the advantages of using the salt soil setting is in extremely noisy environments There are cases where in 3 frequency mode a quiet frequency offset cannot be found but a quiet single frequency setting can be found Another case is when using a single frequency mode in highly alkaline soil such as fields that have been fertilized for years or some pros pecting areas In general if you are having problems with either EMI or ground noise try using the Salt setting possibly with a single frequency mode 1 There have been a few reports from users that simply switching to salt soil in 3 fre quency improved noise rejection This is likely due to the fact that salt mode notches out a small portion of VDI responses a eee ee ee TE E T Srav Audio V3i has the most extensive audio system ever offered in a
48. ificantly conductive salts A pure salt response lies all the way in the non ferrous region of the VDI scale roughly in the midst of foil Some salt water beaches are close to having a pure salt VDI while other beaches include black sand mineralization that creates a composite VDI that can land anywhere between pure ferrite VDI 95 and pure salt Other areas like fertilized fields with residual salt ions can also have a composite ground Advanced User s Guide fF 7 response Many deserts have a layer of surface salts that have been leached from the soil this is generally not a problem as long as it is dry Frequency Metal detectors are produced using a wide range of transmitted frequencies from 1kHz up to around 100kHz though the vast majority fall in the VLF range of 3kHz 30kHz Low frequencies usually favor thicker targets and metals of higher conductivity while high fre quencies favor thin and low conductive tar gets Low frequencies also do a better job pene trating ground mineralization including salt High frequencies tend to generate stronger ground and salt signals which can limit the ability to distinguish weak targets Obviously when trying to detect thin low conductive tar gets like nuggets and jewelry in harsh ground like wet salt sand or black sand there are competing frequency requirements so a com promise is necessary With the ability to run 3 simultaneous frequencies or any one of them
49. ings Most of the V3i programs are set up with nominal sen sitivities but some notably the Pro pro grams are set up a little hotter Most users believe sensitivity should be run as high as possible In some cases this is true but if you find the detector is noisy and falses a lot you probably need to turn it down There are three primary sensitivity settings plus a boost mode Selecting Sensitivity from the 6 block menu takes you to the following menu Sensitivity settings Discrimination All Metal Selecting Sensitivity from the Live Control Bar gives you this 3 Basic Settings Rx Gain Rx Gain sometimes called preamp gain sets the gain of the receiver s input amplifier In most cases you want to set this as high as possible and still maintain stable operation Three things can limit the maximum gain setting The first 1s external noise such as elec tro magnetic interference EMI including 50 60Hz mains and RF EMI typically shows up as erratic operation and noisy audio Secondly in highly mineralized ground excessive gain can cause the input amplifier to overload or operate at close to overload due to the large ground signal limiting the available range for target detection Finally the quality of the loop null can also push the input amplifier toward overload White s V compatible loops are designed to minimize null limitations but third party loops typically have wide variances in t
50. lting pattern is called a discrimination mask From the Live Control Bar highlight the Disc selection and press ENTER This pops up a small window which contains a list of VDIs and each VDI has a checkbox next to it An X in the box means the VDI is accepted otherwise it 1s rejected At this point you can go through each of the 191 possible VDIs and individually set their acceptance However as with audio tones most people will want to accept and reject VDIs in groups for example reject the iron range accept a cupro nickel range etc There is a short cut for setting discrimination for multiple VDIs 1 Move to the first VDI in a desired disc range 2 Check or uncheck that VDI Press hold ENTER then press V to set the same setting to subsequent VDIs This works in either direction so you can also Start at the last VDI and press A As an example the High Trash program has the following discrimination mask Acc Re 95 0 20 40 60 80 95 VDI Again the ferrous region 95 to 0 is com pressed compared to the non ferrous side Tip For all factory programs 95 is always rejected This is the VDI that highly questionable signals usually from hot rocks are assigned Additional methods The method just described is available from the Live Control Bar There are addi tional methods of setting discrimination which are accessed in the more advanced Discrimina tion menu From the Live Control
51. may choose to disable the 6 block menu and go straight to the Expert menus We will cover all the menu settings in subsequent chapters 6 Block Menus i COINS 9 BEACH i RELIG Programs Sensitivity 22 5 KHz gag hag 75 kHz yw Ay 2 5 kHz wie Frequency The 6 Block menus contain the most important settings all in one place Briefly the controls behind the 6 Block menus are e Programs select from a list of pre config ured programs e Sensitivity receiver sensitivity settings e Audio volume tones tone ID e Discrimination discrimination and filter settings e Frequency frequency mode and settings e Ground Tracking tracking mode and set tings plus filters While the 6 Block menu is being accessed the search operation of V3i is suspended Live Control Menus You may want to quickly change settings while searching By default the Live Control Bar is displayed at the bottom of the Search screen and its items are accessible via the left right arrow buttons When a Live Control item ge a TE E T Seirar is selected using the ENTER button a small control box pops up with one or more individ ual controls Program Select A Coin amp jewel Salt Beach k Relic Any available setting in the Live Control Bar performs the same function as any like named setting in the 6 Block menus or the Expert menus but the live controls can be adjusted while the detector is i
52. n Tables Rei Prospecting O pes o pes er O wn OA wa OP soar OP _ soot awa eea o sowed 6 ows SO ae OR 13t0 16 18t0 23 0 to 16 24 to 37 TT E 17 to 24 25 to 50 438t0 40 Q 25 to 50 51 to 54 4110444 4510457 55 to 57 45 to 55 58 to 75 58t0 68 SO 56t0 60 Qe 76t0 80 69 to 75 61 to 70 eS Gi S81 to 86 f 76 to 80 71 to 75 87 to 90 81 to 86 76 to 78 91 to 94 95 NONE 87490 oono o o y ees OT iEn a RA F Pa wy _ MXR RDA Hae a 45 t0 55_ EE _ 56 t0 60 _ a O N NUI In Chapter 4 we discussed several operat ing modes of V3i The audio modes are exten sive enough for their own chapter The V3i Audio menu is as follows CHAPTER Audio Coin amp jewelry HTarget Volume rAudio Threshold Tone EFSearch Audio HPinpoint Audio Hfireless Headphone tLive controls This is a little different than the audio menu presented in Chapter 2 which was accessed from the 6 block menu and was limited to sev eral audio settings but did not include audio modes This more extensive Audio menu 1s accessed by selecting the Audio level tone item or the Search Audio item in some programs on the Live Control Bar and pressing VIEW All of the audio modes are accessed through the Search Audio selection of this AM Tone All
53. n normal opera tion For many of the Live Control items you can press the VIEW button to access additional settings and controls Accessing these screens suspends the search operation of V3i Tip Press VIEW DN and VIEW UP to hide or expand the Live Control Bar Expert Menus Both the 6 Block menus and the Live Con trol menus are subsets of V3i s configuration settings The complete menu of all possible settings is found in the Expert menus The Expert menus can be accessed by pressing MENU MENU from the Search screen this brings up the Information screen scrolling down to the bottom and selecting Expert Menu The Expert menus are very extensive and it is easy for a new user to get confused as to how all those different controls affect the detector We highly recommend avoiding the Expert menus until you get comfortable with the 6 Block controls and the Live Control Bar If you explore the Expert menus and want to quickly exit simply pull the trigger switch a few time Controls V3i uses a variety of different interface controls Most of them are very similar to Advanced User s Guide fF 7 those found in computer graphical interfaces so they will be familiar to many users V3i Displays V3i has 3 display modes corresponding to the 3 positions of the trigger switch e Trigger neutral Normal Search e Trigger forward Analysis e Trigger pulled Pinpoint Each of these display modes are normally tie
54. nce screens often have jump points embedded Press MENU or MENU lt A to jump ahead or back The Quick Reference system is context sensitive so anytime you need help with a fea ture simply highlight the menu item and press MENU ZOOM Here is an example of the Quick Reference screen for AutoTrac speed Advanced User s Guide I1 4 E autotrac speed he Autotrac setting controls how fast the tracking responds to changes in the ground Aspeed that is too slow won t track well but a too fast speed risks tracking out targets About Tracking About Status line f o Keyboard 7 Notice that the Quick Reference entry includes a list of related topic hyperlinks At any Quick Reference screen you can also press ENTER and a list of related topics will pop up In addition to the Quick Reference system V3i also has pop up help balloons which can be activated by flipping the trigger switch for ward Expert menu How fast tracking responds to changing ground conditions Obviously the Quick Reference system has more detail and includes hyperlinks to addi tional help topics but the pop up balloons may have all the information you need Owner Registration The last item to cover in the Configure screen before we get to the Expert Menus is Owner registry Selecting this option brings up the following screen ge TE E T Sprav Owner registry amp Notices SN VaEngx 000 000 000 Jul 12 201
55. ncy and highlight the Offset box Next with the loop held in the air pull hold the trigger to enable pinpoint mode Watch the pinpoint bars and listen to the audio for noise and while continuing to hold the trigger adjust the Offset to find the quietest setting Release the trigger and you re set Ground Tracking Selecting Ground Tracking from the 6 block menu gives this screen Advanced User s Guide I1 Ground Tracking Coin amp Jewelry Hs CHe Locktrac Soil type Norm GLive control Selecting Ground Tracking from the Live Con trol Bar gives you this Ground Tracking AutoTrac and LockTrac select between automatic and manual ground balance Auto Trac is the default in most programs If you select LockTrac the Live Control popup will change slightly because Soil and Speed are only valid for AutoTrac Ground Tracking Autotrac 3 E Ground tracking modes and options are covered in detail in Chapter 4 iEn a ee CHAPTER Chapter 3 covered some of the basic set tings of V3i such as sensitivity or audio vol ume These are adjustment controls which are used to alter the performance or user prefer ences There are other settings which funda mentally alter the operation of V3i We will refer to these as mode settings Different mode settings might affect completely different aspects of the detector such as frequency tracking and tone ID so taken together they offer a
56. ne or pitch Increasing Pitch VCO Threshold Tone In other words as the search coil is passed over a target the all metal audio will begin at a low tone and progressively rise in pitch as the target signal gets stronger The highest pitch is achieved when the search coil is directly over the target strongest target signal and then the audio falls in pitch as the coil moves off the target As with non VCO audio loudness also rises and falls Tip The human ear is more sensitive to changes in pitch than to changes in loud ness Therefore deep targets that pro duce only a very slight all metal signal will be easier to discern using VCO audio However some people just don t like VCO audio or have hearing problems so the option to turn it off is also provided Both VCO and non VCO audio methods have user settings for the tones used In VCO Advanced User s Guide I1 mode the threshold tone is the lowest tone at which the VCO response begins that is the tone heard when there is no target present A target signal will then increase the audio above the threshold tone Its setting is found at Audio ToneVCO Threshold Audio Coin amp jewelry Fixed Threshold Target tone Overload tone In most programs the VCO threshold is set to a mid level tone of 128 Tip A low VCO threshold such as 50 in the Mixed Mode Pro program will make the VCO start out at a low growl and some what increase its Af sen
57. ngs will be saved so when you replace the batteries your program will be just as you left it There is a chance that if you made a change just prior to instant battery death that change may not get saved Tip If you turn on your V3i and the screen flashes and immediately shuts down suspect the batteries iEn eee ee ee TT E T Sprav Quick Reference Quick Reference is the entry point into the on line help system Selecting this option brings up the following screen ET Quick Reference introduction his detector has a built in quick reference guide Pressing while holding the key from anywhere will access information specific to the current control menu entry or dialog Each page typically consists of a short description of a feature setting followed by an optional list of related topics and finishing with a list of all the keystrokes possible from your starting point Related topics are entered by positioning If you scroll down press hold W you will soon reach a list of help topics ET i Quick Reference introduction About Frequency About Discrimination About Sensitivity About Audio About Colors About Tracking About Filter amp Speed About Status line Extending battery life From here you can peruse topics press ENTER to select a topic and use the lt and P keys to move backwards and forwards through your current history of viewed topics Short cut Quick Refere
58. o See Chapter XX for a more detailed discussion of audio responses Tx Boost Tx Boost is transmit boost When enabled it triples the transmit voltage applied to the loop from 10V to 30V and increases the depth Using this feature has two major draw backs it can overload some loops reduce the Rx Gain and it quickly drains the battery There are two common uses for Tx Boost One is when hunting an unusually clean area where most targets have been cleaned out and only deep targets remain TX Boost typically gives about a 1 depth increase The other is when EMI noise is severe Reducing the Rx Gain reduces EMI but also reduces target sig nal strength Applying Tx Boost increases tar get signal strength but does not increase EMI noise so Tx Boost can be used to improve sig nal to noise Advanced User s Guide I1 A note about loops V3i uses induction balanced loops which rely on a null between the transmit coil and the receive coil The quality of the null may determine the point at which the detector overloads especially when running Tx Boost along with high Rx Gain settings Null quality varies loop to loop so some loops may overload at lower gain than others Audio Ground Selecting Audio from the 6 block menu gives this screen Audio settings Audio Threshold ETone EtTone Id DH4ireless Headphone Selecting Audio Level from the Live Control Bar gives you this Targ
59. on Tone lets you select the limit tone if Stereo is selected then the low limit is sent to the left ear and the high limit is sent to the right ear Vol ume sets the sound effects volume Live Search Screen is the entry point for setting up all the options for the various search screens This will be covered in Chapter XX Live Controls is for setting up the options and contents of the Live Control Bar This will be covered in Chapter XX Menu contains the following options Expert menu Reenter at top Quick Reference HTopics Loop selection Out of the box V3i has the 6 block menus enabled and easily accessed while the Expert Menus take several key strokes to enter As you gain experience using V37 you may want to replace the 6 block menus with the Expert Menus The above option Expert Only does this when you check this option a press of the MENU key during normal search will bring up the Expert Menus instead of the 6 block menus The Size option let s you choose the font size used in the menus You can also press the ZOOM key any time you are accessing the menus Normally when you scroll down to the end of the menu list the selected item will stop there With the Wrap option enabled the selected item will jump up to the top of the menu list Normally when you exit the menus back to the search mode re entering the menu will put you right back where you left off Check ing the Reenter at top option
60. on system where different tones represent different target ranges phase responses V3i has the ability to produce a different tone for each VDI number and it is fully user customizable But it can also produce a simple beep no beep audio for those who want to keep it simple If the AudioSearch AudioTone ID selection is unchecked then all accepted tar gets will respond with the same tone as set in the Audio Tone gt Target tone control If it is checked then the target response will corre spond to the tone ID method selected by the Audio Tone VDI Tones setting Audio Coin amp jewelry Y V CO Threshold Target tone Overload tone i Standard Shifted V31 offers three tone ID methods Stan dard Shifted and Custom Setting up a custom tone ID audio is closely related to setting up a custom discrimi nation mask All of these will be covered together in Chapter XX Mixed Mode Audio V3i has two mixed mode options standard mixed mode and stereo mixed mode Without mixed mode you can hear either the all metal iEn eee ee ee Se ee A A E audio or the discrimination audio The all metal channel doesn t tell you anything about the quality of a target the discrimination chan nel only signals on accepted targets and reject targets do not cause an audio response or cause a null in the audio Mixed mode lets you hear both audio channels The advantage is that you can hear the responses of all target
61. oop a foot off the ground pull the trigger to put V37 in pinpoint mode then lower the loop to the ground mak ing sure you are not over a target In most ground the pinpoint threshold level should remain constant unless you have implemented a track offset as the loop is lowered to the ground In severe mineralization a lift off effect can cause an abrupt threshold change in the last inch or so and this 1s difficult to bal ance out Auto Trac AutoTrac mode automatically tracks the phase of the ground signal This is the default ground balance mode for most programs and is the recommended mode except in certain con ditions There are several parameters which control automatic tracking Ground Tracking Coin amp Jewelry Report Inhibit CH4 Locktrac Soil type The Report selection determines whether the tracking status is displayed to the screen Advanced User s Guide I1 When enabled you will see lt lt lt Tracking lt lt lt gt gt gt Tracking gt gt gt occasionally pop up on the status bar whenever V3i is changing its ground balance point At start up it may say Fast Track instead If you don t care to see this information simply un check the option Ground tracking is adjusted whenever V3i sees a change in the overall RX signal phase Targets can cause a phase change as well but far more radically The Inhibit option tells V3i to inhibit tracking when it goes over a fast groun
62. r and was originally created for metered responses When varied tonal responses were added to later models the tones also followed the VDI scale Custom Audio amp Discrimination Low positive numbers correlate to thinner and less conductive targets Gold nuggets small jewelry and foil will often fall in the range of 0 to 20 Medium sized cupro nickel coins can fall in the 20 50 range Silver and large coins generally show up above 70 Many modern detectors visually report the target VDI This might be done as a VDI num ber or as a group of segments which represent groups of VDI ranges Additionally many detectors assign varying audio tones to differ ent VDI ranges for example a 4 tone response might divide the non ferrous range into four sub ranges and assign increasing tones to them The pitch of the tones and the ranges they are assigned to are normally fixed V3i lets you change both Trivia Exactly why 95 was chosen for the VDI scale is uncertain In some cases other manufacturers have adopted this scale while others came up with their own Custom Audio From the Live Control Bar highlight the Audio level Tone selection and press VIEW Select Tone VDI Tones Audio Coin amp jewelry Y V CO Threshold Target tone Overload tone rE Standard Shifted iEn eee ee ee Se ee A A E VDI Tones offers 3 selections Standard assigns increasing tones to every VDI number starting with tone 65
63. s even those that are rejected by the discrimination system This can help in target separation especially in trashy areas and can also help in pinpointing targets On the other hand the increased target responses can be overwhelming and create audio fatigue Standard Mixed Mode Standard mixed mode equally applies both the all metal audio and the discrimination audio to the speaker or headphones In the absence of targets or for targets rejected by the discrimination channel the mixed mode audio output will be the all metal response and you will hear the all metal threshold plus the all metal response of rejected targets When an accepted target is detected the discrimination audio will take over and you will hear the dis crimination tone for the target Due to a hard ware limitation both audios cannot sound at the exact same time so as the discrimination audio comes in the all metal audio cuts out This is illustrated below All metal Audio Discrimination Audio Mixed mode has several settings that are the same as we have seen in the all metal and discrimination modes Audio Coin amp jewelry Search Audio _H4 Discrimination _H All Metal Tone Id Modulation _Ha Stereo Mixed HPinpoint Audio muses tae Lie el eh ee m See the previous sections for descriptions of Tone ID Modulation and VCO Stereo Mixed Mode As the name implies stereo mixed mode is only for stereo audio headphon
64. same is true when using plug in mono headphones Tip For plug in headphones stereo models are recommended Many headphones are mono stereo switchable so if something seems amiss with the audio check that the headphones are in stereo mode ee eee ee ee Se ee A A E When you plug in a set of headphones the speaker is disabled When wireless head phones are enabled and connected both the speaker and plug in headphones are disabled Basic wireless headphone connection was cov ered in Chapter 2 We ll cover it again here with more detail Wireless Headphones V3i is available with optional wireless headphones WHPs which are designed to use a world wide available 2 4GHz ISM band To enable and connect WHPs access the WHP menu at Audio gt Wireless Headphones Audio Coin amp jewelry Target Volume haudio Threshold Once you enable WHPs the menu will expand to include a number of options Wireless Headphone Off Single Monitor battery Version Not responding Speaker Multiple headphones Below the menu of options are two buttons for Connect and Exit Connect synchronizes the WHPs with V3i press the TAB keypad button to highlight the Connect button then press ENTER A pop up balloon will prompt you to press and hold down the WHP power button Wireless Headphone Waiting rower lewel a e Waiting for headphone Press and HOLD headphone power button Press to cancel
65. sitivity to deep tar gets Non VCO audio has a fixed threshold tone found at Audio Tone Fixed Threshold Audio Coin amp jewelry VCO Threshold Target tone Overload tone This is the same threshold tone that 1s used for the discrimination channel Tip The VCO Threshold tone does not affect non VCO audio and the Fixed Threshold tone does not affect VCO audio iEn eee ee ee TE E T Srav Finally the target volume controls move all response levels both all metal and discrim ination up and down in loudness Audio Coin amp jewelry CHarget Volume K Plug in Headphone Wireless Headphone 400 it Balance Discrimination Audio Unlike the all metal channel the discrimi nation channel does not treat all targets alike Discrimination uses the phase response of the target to determine how to respond It is possi ble to assign different tones to different phase responses or to completely ignore targets with certain phase responses Threshold In this channel the Discrimination Sensitiv ity setting determines a threshold level above which you will hear target responses In many detectors this setting is simply called Thresh old but V3i has separate adjustments for each channel The following graph shows the rela tionship between the threshold level and the detection signal Only detection signals that Audible Signals Threshold A k Nresna r x TOT gM Detec
66. t also can be used as a poor man s stereo mixed mode by putting the Target Volume in one ear and the Audio Threshold in the other However true Stereo Mixed Mode audio does a better job of this Modulation Audio Search Audio Modulation allows you to enable target audio modulation and to adjust its effect Modulation is a technique where progressively deeper targets have a pro gressively weaker audio response the beep A shallow target produces a loud response and a deep target produces a soft response If mod ulation is disabled then V37 attempts to pro duce the same response loudness regardless of target depth With modulation enabled you can also adjust the Range setting which affects the strength of the modulation A low setting makes shallow and deep responses more simi lar in loudness and a high setting makes the modulation more pronounced Tip Modulation is most effective when you want to distinguish between deep and shallow targets of similar type For exam ple if shallow coins are likely to be clad and deep coins are likely to be silver then modulation will give you that information in the audio response Tone The Audio Tone selections allow you to set up several common tones We ve already covered two of the tone controls Fixed Thresh old and VCO Threshold V 37 tone settings go from 1 to 255 which roughly corresponds to a frequency range of 5 1000 Hz A setting of 0 a eee ee ee TE E T Spr
67. t the settings do V3i Audio Modes Audio Coin amp jewelry Target Volume h4udio Threshold fH4 Discrimination CHA All Metal _Ha Mixed Mode _Ha Stereo Mixed HPinpoint Audio Ohiireless Headphone tLive controls V3i has the following four search audio modes e Discrimination e All Metal e Mixed Mode e Stereo Mixed Mode Discrimination mode produces audio only from the discrimination channel and All Metal mode produces audio only from the all metal channel The two mixed modes combine audio from both channels but in slightly dif ferent ways e Normal mixed mode puts both the all metal audio and discrimination audio on the left and right channels However due to a hard ware limitation both audios cannot sound at the exact same time so as the discrimination audio comes 1n the all metal audio cuts out Stereo mixed mode puts the all metal audio on the left audio channel and the discrimina tion audio on the right audio channel This allows both audios to sound continuously All Metal Audio The all metal channel simply detects and Advanced User s Guide I1 indicates metal targets It does not care what those targets are nor does it attempt to tell you what they are The all metal audio channel is also used during pinpointing Tip In the all metal mode SAT self adjust ing threshold is applied so if you hold the search coil steady over a target the audio response will fade away on
68. tion Signal exceed the threshold level shaded in gray will become audible target signals Otherwise you will only hear the threshold tone Increasing the Discrimination Sensitivity setting lowers the threshold making V3i more sensitive to weak target signals Like All Metal Sensitivity this can also increase the amount of Advanced User s Guide I1 audio noise and can make V3i more chattery especially when EMI is present The discrimination threshold level can have a tone associated with it so that you can continuously hear the threshold level and listen for perturbations that indicate a target You can then select the tone for the threshold by access ing Audio Tone Fixed Threshold Audio Coin amp jewelry Y V CO Threshold Target tone Overload tone This setting also controls the non VCO all metal tone The loudness of the discrimination thresh old tone is set in the Audio Audio Threshold menu The volume can be independently set for speaker standard headphones and wireless headphones Audio Coin amp jewelry Audio Threshold M Plug in Headphone 3 a MWireless Headphone The balance control adjusts the left right bal ance in stereo headphones which allows you to compensate for hearing imbalance The one control affects both types of headphones Setting the threshold volume all the way to zero will result in silent search no threshold tone The Discrimination audio sele
69. tremendous amount of flexibility to the user Frequency The most fundamental of all modes is that of frequency V37 1s a 3 frequency metal detec tor but it has the ability to run in other opti mized frequency modes The available modes are e 3 frequency normal e 3 frequency salt compensate e Single frequency 2 5kHz e Single frequency 7 5kHz e Single frequency 22 5kHz The frequency selection screen in V3i looks like this Transmit Frequency Coin amp Jewelry M Frequency Offset o i GLive control 4 Operating Modes One reason for using multiple frequencies is that some targets respond better to certain frequencies than others Targets that are thin and made of low conductive metal typical of most jewelry respond better to higher frequencies which is why many gold nugget detectors are designed to run at much higher frequencies than most other detectors High conductive targets especially those that are thick respond better at lower frequencies Also ground mineralization has a weaker response at lower frequencies resulting in bet ter ground penetration in highly mineralized areas The three frequencies 2 5kHz 7 5kHz and 22 5kHz were chosen because they offer excellent target coverage Note also that they are harmonically related by factors of three This makes waveform processing much easier Though not particularly important to the discussion here is what the transmit wave form
70. uts ENTER P spacebar add a space ENTER backspace delete preceding MENU P move right MENU lt move left ZOOM P move to the end of the text ZOOM move to the beginning of the text ENTER ZOOM overstrike toggle between insert amp The Keyboard Editor is also used in Pro gram file operations covered in Chapter XX We will refer back to this section on how to use the Editor ae eee ee ee TE E T Sra Ground Tracking In order to better handle variations in ground mineralization many detectors now incorporate automatic ground tracking White s uses the trademarked term AutoTrac The detector attempts to determine what part of the signal is due to ground and continuously track the phase and strength of that signal and eliminate it One trick is to limit the range of VDTPs for normal ground the grayed area in the VDI scale and consider anything else a target This works for most soils with two caveats Besides normal ground mineralization some areas contain rocks or small pockets con sisting of material with slightly different min eralization than the surrounding ground The difference in VDI between these anomalies and the surrounding ground isn t enough to consider them a true target but they are small enough to act like a target to the detector s ground filters These so called hot rocks can create annoying responses in many detectors Another situation concerns soils with sig n
71. wrong key or key combo pulling the trigger switch will usually back you out Two of the V3i keypad buttons have dual names MENU TAB is used both as an entry but ton into the menu system and to tab from one screen area to the next This tab method is identical to how a PC interface uses it So in some cases we will tell you to press MENU in iEn eee ee ee TE E T Seirar other cases press TAB It s the same button ZOOM VIEW works the same way V3i also has four arrow keys and these may be either called UP DOWN LEFT RIGHT or UP DN LT RT or represented with the symbols A V lt 41 P We are free to randomly choose any of these repre sentations Most menus are nested so instead of tell ing you to select the Expert Menu then select the Configure menu then select Live Search Screen then select Analysis then select Sizing then select Screen Top we may instead say select Expert Menu Configure Live Search Screen Analysis gt Sizing gt Screen Top This means to drill down through the stated menu path Target VDI Disc Mask Status Bar Trigger Switch front of handle A Coin amp Jewelry Advanced User s Guide fF 7 Finally there is a trigger switch under the pod It has a normal center position a for ward position and a momentary pulled posi tion When we say pull the trigger we mean to pull it to the momentary position and release it If we say Pull hold the trigger

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