Frequencies

[markg]

When you push noise cancel, does that mean that only one of the 28 frequencies will be used and not all 28 at one time?

 

[dewcon4414]

Well let me see if i can break this down for you. What happens when you noise cancel the machine will choose one of the 11 channels available. EACH of these channels use 28 preset but RANDOM freqs or harmonics. What i mean by that is take the SOV... its freqs are factory SET at 1.5 kHz intervals. All 28 freqs will be used in the channel selected, either by the machine or manually. Not all of these 28 freqs will be used when averaging to get the TID. Ive always said it sure would help if we knew what each channels settings were. Because we all know low freqs equal depth and high freqs equal sensitivity... they also affect how soil or EMI affects the machine. Everyone knows what the SOV is set at im not sure why there is such a secret on the explorers.

Dew

 

[stasys]

no, noise cancel will shift frequencies very slightly, for us users is just help to make detector better working. Stasys

 

[outdoors]

If I read this correctly the Explorer uses different frequencies from 1.5kHz ----100kHz from page 10 and 11 in Andy Sabisch book very good book to have and read

 

[dewcon4414]

What Andys book says and i didnt say very well i guess..... quote from page 11.... UNLIKE THE BBS CIRCUITRY WHICH SPACED EACH FREQ BY 1.5 KHZ, THE FBS CIRCUITRY COULD SELECT ONE OF 11 POSSIBLE SETS WITH EACH PROVIDING A SLIGHTLY DIFFERENT SPACING BETWEEN THE 28 FREQ AND THE UPPER AND LOWER FREQ. Those 11 possible sets are your CHANNELS. Those 28 freq or harmonics in each channel do run between 1.5 and 100 kHz, and these change with each channel.... either up or down the scale. Hope this helps Mark.

Dew

 

[widebody]

[size=large]darn good question and thanks to those who answered.

HH[/size]

 

[stasys]

on some other forum I saw man connected explorer to osciloscope and in 11 channel explorer use a bit higher frequencies or composition frequencies, compare with 1channel, but it was so small difference that in the field its not any different. Stasys

 

[thebeatmachine]

YIf you hook up a frequency counter , and go through the 11 noise cancel channels you will get 11 different frequencies ranging around 12 khz or so. As far as BBS goes there are many theories on how it works, and some also sat that it is marketing.

 

[widebody]

[size=large]my question deals with how strong are these signals on the freq.? a single vlf has more strands in the coil giving a stronger signal? where as the fbs has less strands per freq. but more freq. but results in a weaker signal? i'm not an engineer or electrician. i don't even spell well.

HH[/size]