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ADX-S V2: Bluetooth no signal?
开云体育Guys, Two customers reported the same issue, and I think it is better to write a message here. If you can pair the Bluetooth module with your smartphone but you cannot send or receive signal, you probably forget to connect the audio in and out - PA0 and DACL. These two pins are not in the 4-pin header. Instead they are on the PCB side. I write becase I know you don't read Assembly Manual :p BTW, if you cannot trigger TX, you should increase the Bluetooth
volume to the max. No worries about over driving it. Thanks, Adam |
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Re: ADX-S V2!
Here you are , here is one exasperated? American... see what? The PRC communist party is? doing to Americans.. they can 't sleep at night and they tear their hair out
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It's worse that water torture. I think the Russians? may be in on the plot too.? Just for the lack of a one page? paper manual that is accurate .? But you see ..that's part of the whole scheme .. it is? so awfully cunning.? And small Chinese Ebay? merchants can feed the wife and child on US money spent for nothing... and the PCB factories too.. htey have a base workload out of this.? China Airlines gets to fly more freight.?? https://www.youtube.com/watch?v=L1L8ovRXlac&t=158s Ebay 0-55 MHZ DDS Signal Generator |
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Re: ADX-S V2!
INventive? or not so inventive? Chinese Entrepreneurs copied the design as? the? Indian released the code.? ? But? as for the? working description , that turned into a disaster.?
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It's fine for sig gen use but as soon as you want to mess with offsets for a superhet you need to understand the cryptic description.? Now all these tin shed back market vendors? are? doing? a 3 x distant? translation? into some? Siberian dialect of English and they think the purchaser will be fine. IN the description I have they bring up config settings that are in the wrong order and even? variables that don't exist.? Best of all this PCB features? RIT BUT there's no mention anywhere of what? Pin has to be active high or low for the? micro to order up the frequency displacement.? So basically? RIT has to be enabled manually every time you ant it? or of the TR swithch if the? CW rig has one? (ie put a mosfet? across the switch contacts for? "remote access") The INdian? software developer hints at one point that the VFO can be told if the? Rig is in Tx or Rx? but? then moves on to more exciting territory.?? You just about get a? ?PhD in? HMI design? ?just working out how the damn thing works.? I 'll copy a video to you of? an American who? bought two and ended up calling them? hot mess of horse poo because he got so exasperated. He worked out the mapping for the keyboard or someone told him however I bet nobody told him that the has key has two functions. Timothy E. Fidler : Engineer BE Mech Auckland?
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Re: ADX-S V2!
? THe calibration constant is obtained by comparing the output in SIG gen mode? , no? offsets , at say 30 Mhz against a known standard frequency counter? and? arriving at a number? like? 0.99867 which adjusts for the? on board? oscillator module not being precisely on frequency.? The default is? 1.00000 ? As you tune down through? 4 Mhz you will in fact be mixing? if this is? single conversion SSB Rx application UP to take? signal from 14 Mhz . BUT the generated? Audio from the second mixer will be garbled as it will have been mixed with a CIO running for? LSB offset. YOu have to switch the CI Osc? (the? 10 Mhz? analogue oscillator that has nothing to do with this DDS)? down by about? 2 Khz so the mixing is compatible? with a? USB signal that has come out of the ladder filter chain.? YOu need to understand this subtlety before working on a? SSB or CW - superhet design.? THough for the CW rx it's less of an issue. ? With the particular CAL I have indic. you will NOT be able to receive any high side signals above? 18 Mhz . BTW if you set up for HIGH sided injection , in the CAL? MODE you would enter the IF_offset as - 10. 000 Mhz yes minus and say? MIN_FREQ as? 12.0000? Mhz.? (the maximum is whatever the hardware can do which is about? 40 Mhz withh the AD 9850 and a 125 Mhz package reference oscillator.? NOT 55 Mhz . The vendors lie, imagine that.? ? So if you look at the flowchart? the firmware takes the desire? frequency out? say? 13.0 Mhz and calcs? Minus? negative? 10.00 , the IF offset in? High side mode.? and get 23 Mhz . THis is correct? (and by the way? 13.0MHz is on the LCD) . So the received? RF at? comes into the mixer , does a productmix with 23? Mhz and produces? 10.00 Mhz and? 36 Mhz? mixing products, the latter one being discarded in a post mixer filter? (or just getting lost in the board capacitance in a cheap design). ? Bottom line - for practical? Ham use - it's best to set up for Low side injection with a Cohn? xtal? filter of? either? 9 ,? 10 , or? 12 Mhz and accept with this sort of architecture you are not going to receive signals above about? 20 Mhz. THat way you are not having? mess about with? the? CAL function all the time? (which wears the? Flash in the? PIC every time you do it ) and requires you? attach a hex keyboard - you can't do it with the encoder as there is no way to enter a negative number? for IF_OFFSET or MIN_FREQ? with encoder input? (with keypad # preceding a number is taken? as a negative integer by the firmware ).?? ? That's it - did you get this far.? (walk up to the front and get a? certificate of SSB? signal engineeing...)? ? I can? post a photo of the? DDS in question - they are all over the internet like cockroaches still and cost? about 22 USD.? The big advantage of this DDS over one based in Si5135 is the output is? Sine wave. This is important if you are using a Gibert cell mixer. It also means if you put in a LP filter above your max Freq_out (say with a -3dB point at 22 Mhz) then that filter processes the entire range of output. You can't get away with this with a square wave output DDS . Downside is you don't get enough power to drive a? 7dBm diode mixer directly from this DDS6EA? mixer(that's the? part number on the back of the one I purchased).? ** I provided a schema in an earlier post that WILL bring the? output up to at least 5 dBm in a 50 Z load. ** Modelled in? LTSpice and it works in practice.? ? It has? 5 function push buttons along the bottom and Two off PICs 6F 628? on the back as controllers.? The output is via? Mini SMA connector and you need to buy that? connector compatible with your RF coax? when you get the DDS because they can be hard to find. The fixed connector on the? DDS board has a MALE pin in it. That's the physical implementation I purchased-? your mileage may vary. ? Since Adam Rong does not sell these it's? a bit cheeky to discuss here? but someone asked in the thread about the unit and programming of same and the documentation is either not provided or it 's? a Mad Woman's Breakfast of a document. That's why I had to hunt out the original Indian? (Cv Niras, the firmware designer possibly even SK now - it 's a Long Road... ) documentation. Even that is cryptic and has poor English in it (for a technical document). Maybe Adam RONG should find these in the Marketplace , test them and do CAL on them to the user's specification and sell them at a small uplift as a known good unit. ?? Just an idea. ? TE.Fidler NzL (soldering but not hammering a key at the moment). ? ? ? ? ? ? ? ? ? ? ? |
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Re: ADX-S V2!
I referred to? USB LSB? Carrier injection shift in last message in a SSBtcvr andVFO use? (EBay DDS Vfo )? ?Just to stop confusion here's an implementation. It might not be beautiful but it gives the idea.? ?The SSB vfo from the web has no output tocontrol this shift but by hacking the design as in a hardware latch on the push button etc etc it could be made to have a tight fit. ? TEF? ? Carrier generator schematic follows? -The Bitx -? the Vampire that keeps coming back.. never to stay still in the grave !!? |
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Re: ADX-S V2!
Taken? from the? ?Kingtronic15? site ... this is extremely cryptic but it? ?shows how the? display / VFO is set for? High side injection or low side injection under CaL mode.
For MIKE Angelo and anyone else who wants to use this version of the Mr? (Indian? EE )? ?CV? Niras DDS VFO? ?- this bit is the vendor's copied words wiht out edit- it is highly inconsistent and confusing.? ?later on I give an ENGLISH version of what is going on. I was helped by the CV Niras's (Indian New Del Firmware designer in the? early? 2000s) block diagram of how the CAL is done? at startup. Otherwise I'd be just another confused? Monkey in the zoo on this piece of " Hot stinking horse _sht? " as the? Ytuber said? (true story)? ?
Product Description:
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? ? Features :
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? ? This is a 0~55MHz DDS Signal Generator. It is based on AD9850 chip and is very easy to operate.
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? ? Supports 0~55MHz continual adjust at 1Hz step.
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? ? This generator has 78L05 voltage regulate. Input current at 200MA, input voltage 8-9V would be the ideal voltage.
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? ? Input voltage of 12V can only be used for short time testing, otherwise will cause heat to board.
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? ? 5p/6p connect to encoder as per photo. 7p of the middle connects to digital matrix input. 14p (8V GND) is 8V power supply from main board. If powered by main board, DDS does not need independent power supply.
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? ? 1~6 correspond to 6 frequency bands: (3.8，7 ，9，14，18 or 21，27 or 29)
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? ? ISB, USB, CW are the three mode choices.
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? ? DT is signal from main board.
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? ? Keys & Connection interfaces:
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? ? ENC: encoder switch
? ? MEM: switch for memory mode
? ? VFO: Transfer from VFO A to VFO B, or from VFO B to VFO A.
? ? SSB: Working mode change: circulate from USB, LSB, AM, CW, and on and on...
? ? RIT: fine tuning to receiving frequency
? ? CAL: set functions
? ? KB-1 and KB-2 have common shared pin, but is not GND.
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? ? How to operate:
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? ? Press CAL, power on, then we enter setting screen. Let go/release CAL.
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? ? A: ENABLE 6XREFCLE: setting chip clock mode, adjust frequency encoding setting. AD9851 set to 6-multiply frequency, AD9850 set to 1multiply frequency. Press CAL then quickly release to enter next step B.
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? ? B: DDS-SYSTEM-CLK: Chip working frequency setting. Use encoder switch to adjust value. Operate in accordance with STEP key. AD9851 set at oscillator 6-multiply channel, AD9850 set at actual output of oscillator. Press CAL then quickly release to enter step C.
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? ? C: MIN_RX_DDS_FREQ：Setting minimum working frequency. Use encoder switch to adjust value and in accordance with STEP key. Press CAL then quickly release to enter step D.
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? ? D: MAX_RX_DDS_FREQ：Setting maximum working frequency. Use encoder switch to adjust value and in accordance with STEP key. (Smaller than 60MHz would be OK ). Press CAL then quickly release to enter step E.
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? ? E: SSB_OFFSET：Fine tuning for SSB working mode. Use encoder switch to adjust value and in accordance with STEP key. Press CAL then quickly release to enter step F.
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? ? F: CW_OFFSET：Fine tuning for CW working mode. Use encoder switch to adjust value and in accordance with STEP key. Press CAL then quickly release to enter step G.
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? ? G: OFFSET_FREQ：Setting of offset Frequency. e.g, set to 9MHz or 10.7MHz, use encoder switch to adjust value and in accordance with STEP key. Press CAL then quickly release to enter step H.
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? ? H: MULTIPLIER: multiply setting for frequency. Should be set as 1, press CAL then quickly release to enter step I:
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? ? I: Screen displayes word "SAVE", automatically save the above setting, and returns to normal working.
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? ?
? ? Notes:
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? ? 1. DDS SYSTEM CLK: can use frequency tester to get 30MHz oscillator, multiply the tested value at 6, then put the multiplied value here. If using AD9851, make initial setting at 180000000.
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? ? 2. OFFSET FREQ: can be set as + or - . Rotate encoder switch to change value, press STEP key, then rotate encoder switch to adjust step. Minimum working frequency plus (+) offset frequency should be high than 0 (zero).
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? ? Frequency display:
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? ? RX = MULTIPLIER x (RX_DDS_FREQ + OFFSET_FREQ)
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? ? TX = MULTIPLIER x (RX_DDS_FREQ + OFFSET_FREQ + TX_OFFSET_FREQ)
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? ? The frequency programmed into the DDS, is calculated as shown below.
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? ? RX = ABS(RX_DDS_FREQ)
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? ? TX = ABS(RX_DDS_FREQ + TX_OFFSET_FREQ)
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? ? RX_DDS_FREQ, MIN_RX_DDS_FREQ, MAX_RX_DDS_FREQ, TX_OFFSET_FREQ & OFFSET_FREQ
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? ? Examples:
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? ? 1. DDS output range 30~40MHz:
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? ? MIN_RX_DDS_FREQ MAX_RX_DDS_FREQ OFFSET_FREQ RX Frequency display range.
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? ? 30 MHZ 40 MHz 100 MHz = 130 MHz to 140 MHz. \ Note 1
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? ? 30 MHZ 40 MHz -10 MHz = 20 MHz to 30 MHz. /
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? ? -40 MHZ -30 MHz 170 MHz = 140 MHz to 130 MHz. \ Note 2
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? ? -40 MHZ -30 MHz 60 MHz = 30 MHz to 20 MHz. /
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? ? 2. setting FT180A with DDS:
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? ? ENABLE RPT NO
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? ? X6 RECLK X6
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? ? DDS SYSTEM CLK 180M
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? ? MAX DDS FREQ 65M
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? ? MIN RX DDS FREQ 10.701M (Offset frequency + RIT frequency)
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? ? MAX RX DDS FREQ 60M
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? ? TX OFFSET FREQ 0
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? ? MAX RIT OFFSET 1K (RIT frequency)
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? ? OFFSET FREQ －10.700M －(Offset frequency)
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? ? MULTIPLIER 1
** Confusing set up instructions for DDS6E? VFO Board? firmware revision? 4.03 ??? end here - aren't you glad you read all that? ! ** ============================ TE Fidler continues? The? basic rule is? High side injection the? carrier frequency? has to be? set as negative carrier frequency because under all sided? "IF offset " is going to be subtracted. So if you are on? high side? then if you enter? -10 meg it? subtracts a NEG? number from the? current frequency? register and there fore adds? 10 Mhz.? to what is? output.??
You enter the minimum frequency called? RX_FREQ_MIN though it is same as? Tx frequency MIn? as? the IF plus one 1000 Hz if you never intend to set? SSB? offset or? Rit _offset more than? 1000 Hz.? SSB_offset is? used for fine tuning receive audio without the other? method of changing the CIO (which latter isbad because you mave now changed a parameter , the carrier frequency? which? is nominally the same as the IF_offset which has been entered ...so the analogue CIO generated in the carrier osc has to be left alone once it? is set for maximum opposite sideband suppression on a scope.? At this point the? frequency has to be measured in the radio? Rx? ?with a separate known accurate frequency meter. (which now cost about? $16 as a? 6 digit module from China )? ?
Ok so? if? 12 Mhz Ssb comes in front end? whether LSB or USB it will? be added and subtracted to? ?22 Mhz? ex VFO? giving 32 Mhz which we lose in the filter? BPF post first mixer? (better be there )? and 10 Mhz? which? runs down the? Ladder filter.?
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I'm not going to do math for? Low side inject but you HAVE to enter? RX Freq MIn as negative? and? IF_offset as? the raw number say? 10 Mhz.? ?Say? Miin _Rx? is set at? -8? ?The minus tells the firmware to? set the encoder up (internal software to? make frequency drop when encoder goes? clockwise )? ?The? Minus is? then removed from the? MIN _Rx? and? it is put in a register 2? ?then? IF_ offset is? subtracted giving negative 2 Mhz? ?the SSB_ offset is subtracted from this if in LSB mode? and added? in USB? mode as per? LSB/USB select button? ?mode. It's impossible to? change? SSB_offset without another cal cycle.? so SSB_offset istaken by me to represent the offsset specific to LSB? ?(this is never a problem if the vfo is used in? a monoband ham? transceiver... read on....)
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There is no on the run fine tune except by the VFO direct.? Right before the number is sent to? AD chip? 9850 for conversion the software takes an absolute value? so? -2 becomes 2? So the firmware tunes? 2 then three then? 4 mhz? until it reaches the limit of? 10 Mhz.? I suspect it stops there? (something I am going to check because? it would then begoing into Mixer HIGH inject mode and sideband inversion.? so at 2 Mhz out? 8 Mhz becomes? 10 Mhz desired and? ?the? alternate mix is 6 Mhz which the? IF filter (Qtz ) strips.? at? 3 Mhz out? correstponds to? 7 Mhz selected and you are at the bottom end of the 40 mtr band and so on... when you hit? 4 Mhz? internally? (-4 mhz in the register)? 10 + 4? = 14 so you are turning the? 20 mtr band .
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HOWEVER? if you have set the? Carrrer injection Osc? (screen driver set on the trimmer ) or? LSB? ?then none of the? 14 Mhz input can be decoded by ear because there is signal inversion in the? final mixer before the audio amp.? The only way around this is to have a USB /LSB switch on the acutal OSC which pulls the? osc lower to put the? USB in? range of the xtal filter pass band .? When you so that? the SSB _offset likely won't? be suitable for? proper audio on USB mode... you can detune the radio for best recovered? ?USB audio but then the display would not be showing the? correct phantom carrier value for that? transmit (if you were to transmit to a schedule of frequencies )??
When in Low side inject? ?7 Mhz desired? on this? IF is? ?3 mhz out? ? The software goes? ?ok take integer? 7 000 000? (shown in Mhz but in a? Hz format on the screen )? ? ?(encoder reg. ), copy to encoder register? 2? ? Minus? IF_offset? = -3? ?apply offsets? take abs( value o if a? neg number)? , convert out? via the AD chip? , grab register? 2? now ADD The? IF_offset? ?, display this number? = 7 Mhz in the LCD? in in this case .? The only way to get a second? SSB _offset? for use in? decoding? SSB USB if doing low side injection would be to have a figure either Plus or minus? (order of? 2000 Hz say) in the? RIT? set up at Cal time and put the? controller into? CW mode? (one of four modes ) so CW? (the only mode in which RIT is applied in the firmware)? becomes the? default? SSB_usb mode .? There's an issue though? RIT is only applied on? ?Rx not on Tx so the notes tell us .. .fine but how does the? Vfo know when the tcvr is in transmit mode... that's one of the Mysteries of the deep... I suspect there is an undocumented input on the Black IDC cable..... for? Tx rx mode ??
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That's the only work? around with limited firmware available? Most? simple? Single conversion? SSB kits don't even have? CW or achieve it via pure tone injection into the SSB mixer so? this is not a huge issue.? The problem will be if trying to do? CW? production? via? electronic unbalancing of the mixer because you now don't have an independent? RIT frequency you can select - you will have to put up with whatever hum or Whine you might get from the? RIT offset that produces? best USB decode in SSB mode.? NB In AM mode? no offsets other than IF_offset are applied so this operates as a VFO for a? 1960s? primitive ham cw tcvr with NO Rit? so you have not lost? CW but it's not that convenient to use if you reallocate the? RIT_offset function.?
The issue of receiving? images from above the IF frequency from the Great Ether is an issue all? Single conversion? rx have to put up with -? a simple design produces this compromise .If the? frequency of? IF? is? 50 Mhz then a lot of the numerical issues above all go away because? ALL Vfo use? is? Low side injection for the? HF bands to? 30 mhz and beyond.? Building a? SSB? cohn filter that works at? 50 Mhz is? a magic and secret art -so radios that work? like this on Rx must have? an internal work around like? a Low? IF? filter for? ?SSB out and? another for Rx of? SSB (as an example ) or conversion to? 50 Mhz? with a wide ceramic filter there and then second? down conversion? to say? 10.7 Mhz or? 9 Mhz where the real SSB? Filter passband is. Ergo? Many ways exist to skin this cat. The wide Red board VFO version as sold on Ali and? the Bay? would have all these? FOibles? too because the firmware appears to be the same?
It's late here? and I'm hungry so I did not do all the spell check corrections - if you can't understand it as is then you should not be? reading it.? ? Timothy E. Fidler : Engineer BE Mech Auckland? |
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Re: ADX-S V2!
Is the same thing but the price is too high.??
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I found one still at? 25 USD from a reputable vendor today.? I 'll see if I can spot it. I thought I saved the? EBAY china link.? The? Red board version with all the keys on a keypad to the RHS of the pcb is about $45 usd (it comesup on the same advertisement when I load the URL you sent me) . it has the same firmware but the ports on the back are different I don't know? if there is much documentation on this one . THeRF output is via? parallel wires an NOT through an RF connection onthis one.? I also includes a NE 612 chip? on the board and can send off? SSB as a DSB signal to a second board which you build.? ?Since the? rotary encoder comes mounted onteh PCB it's a lot less flexible if you want to say build a miniature RxTx or? ?Rx only because you are forced into certain cabinet sizes.?? I can also send a generic post board amp unit with a general filter. THis is from the Indian documentation (legacy documentation from CVN ) .? THe hold downbold (see photo) obsures one schematic item? which is a one K resistor in thebase bias of the 3866 This single stage amp will not drive? the? SBL series of mixers.? It likely just gives you? 400 mV pk pk at 200 R nominal impedance? . Note how the? designer has attentuated the drive signalto the? RF transistor by the pick off in the resistor network . This has been done for a reason.? ?THere was no? documentation concerning the background to the schematic in the Niras document that I recall. I think this? schematic has now been deleted from the? Indian? HamradioIndia? etc? documents file> I printed it out years back. What I send is photo of the? hard copy of course.? I don't want to get into running it through LTSpice.? It's of no interest to me as I need tobe able to drive a passive? DBMixer NB File name should be 9851? 9850 is electrically similar but? latter has lower maximum freq out.? the 51 can have a clock speed of? 175 MHz or there abouts so it can generate up to? 58.3 Mhz? sine out on that basis -? much of US Low band VHF so called.? which includes the? 6mtr band of course? Timothy E. Fidler : Engineer BE Mech Auckland?
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Re: ADX-S V2!
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Timothy E. Fidler : Engineer BE Mech Auckland? My magnum OPUS ex my head and LTSpice simulation is attached.? Treat it as weakware until I have my SBL- 1 on the bench and? have all the? physical ccts laid out on? PCB (as in? isolated pad design on a bit of FR-4? 35 um material or similar). NB There is cct discussion in the last post. BTW the? input? H- z buffer is the Hycas deign? first used? I think by Wes Hayward? ?now a Silent K. Don't? subs for? the? J310 unless you have a FET? that has Idss of? 42 mA or better and? the same characteristics.? Leaded solderable? J310s are still about in? Isamabad Bazaars and similar places- you? need to look. I did and? I found.??
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Re: ADX-S V2!
?Here's a cct htat has been simulated on LTSpice. It assumes that the? DDS will put out? ?300 mV PP on all VFO Frequencies .. see the schematic for details.
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THe implementations of the? RFtransformers are critical. FIrst one do beone with a BN 43-202 or? ?BN61-202 as a full isolated? transformer.? Flux loss must be minimised by? tight winding.? THe second transformer is bifilar on a? FT43- 50? toroidal core? but it cold be done on? a binocular ferrite too as? bifilar design DON't? Use a? CT core? ?conventionally wound design unless you have plenty of time for messing with T2? ? ?I am going to be testing this in next week or so - I am waiting on an SBL - 1 in the mail but I do have a back up plan. The? 3 V? DC source shown will have to be implemented with a? 3 V 3? Zenner diode and a ballasting resistor to keep the zenner below 400 MW dissipation.? The circuit does not want to work if that? base bias supply has? too much impedance.? ? ? I will use? The Xtal buffer of? the Carrier inject osc of a MST -2 - old Oz qrp design as the RF source.? It's likely to? be more than 300mV PP? but not more by that much.? ?I'll also test the cct with? a DDS6E? later.? Timothy E. Fidler : Engineer BE Mech Auckland?
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Re: ADX-S V2!
The link to? Niras's work document is here?
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https://archive.ph/2013.07.08-234820/http://www.hamradio.in/circuits/dds.php look at option 1 in the hot links at the bottom? of that page .? -circuits and documents? THe documents are in PDF format.? They are cryptic but better than a Chinese translation poorly done .? Leave Mr Niras Vu xxy? ham still maybe? ?all? alone ... he did this years ago and does not need questions from the US from some product he has no control over nor makes any? dollars or rupees out of.? ?NB My firmware is? version? 4. 03 .. not version four period .. what hacks have been done in meantime I dinna ken.? I got this thing in my hand for? about 55 dollars freight in.? For what it is and thefact it was not dead onarrival. I should be grateful.
You will need to get an SMA? angle connector? for? RG 174 or? RG 58U - don't solder onto the PCB ... a route to hell in a handbasket.? I do believe the? RF out is capacatively coupled? - my DVM checks suggested that.? ?you also need to get? Dupont type connectors and an header box types? to go into all the white? mini Molex? connector headers.? NB When NOT in? cal mode the Cal button becomes the Step button for? selecting the digitthat the? Encoder is running and obviously in paral setting the frequency .? Hold Select down and turn the encoder R and L this moves the cursor left and right under the frequency display integer. ... it's pretty standard interface /HMI? for this type of? VFO .? HMI =? HUman machine interface.? Ever since there were female astronauts you have to say? HMI and not MMI.? MMI was good. we could have? stayed with that for? 100 years and stopped pissing around with frigging pronouns schiesse? too. I bet Mr Niras, the Gd of? ?VFO firmware? ?is consistent in? his pronouns if not in his documentation materials.... YOu don't need one for the? centre seven pin? connector if you are? not going to connect the? 4 x 3 matrix key pad for CAL settings . Of course if it comes with the? software? clock frequency? (user parameter ) not equaling the? physical? 125 Mhz clock? (at least that's what's mounted on my PCB),? ?then you have to fix that via having a keypad.? Whew....? all I wanted was a box to wire an encoder to and take RF out of ,.. . not a Phd in? DDS firmware design and HMI.? ?It's like buying a Big Mac from Ronald McD? ?and getting the? Mac plus a cockroach in the bag? - which to eat first? ?? 73s and all that... Timothy E. Fidler : Engineer BE Mech Auckland?
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Re: ADX-S V2!
It's all over? EBay? ?The? seller I used? was? called Goodie310 but he no longer exists.
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Here's? an example on? ALI? but I hate Ali it is very ddangerous for big? Bank rip offs.? I know someone it happend to. https://es.aliexpresscom/item/1005006664221254.html?src=google&src=google&albch=shopping&acnt=548-301-0399&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&gclsrc=aw.ds&albagn=888888&ds_e_adid=&ds_e_matchtype=&ds_e_device=c&ds_e_network=x&ds_e_product_group_id=&ds_e_product_id=en1005006664221254&ds_e_product_merchant_id=552825885&ds_e_product_country=NZ&ds_e_product_language=en&ds_e_product_channel=online&ds_e_product_store_id=&ds_url_v=2&albcp=20738329408&albag=&isSmbAutoCall=false&needSmbHouyi=false&gad_source=1&gclid=Cj0KCQjw9vqyBhCKARIsAIIcLMEZaMm8LCfkhFuBnwBfSyOY_NVPKbecGxSoNU6wFyu4DSR3m_8y5jUaAh-yEALw_wcB&gatewayAdapt=glo2esp This is? a chinese vendor . Prices are about? ?USD 20 pust postage.? you should have it in your hand for? USD 28. Whether it works is another matter.? Not works properly works at all.?? If you do a YT search on? DDS6e? generator? you will find someone with a? possible canadian accent bitching about having to? add a keypad to do the set up. If you can use it? as? a sign gen with out? IF and? do the calcs with a chart eg? on? 10 Mhz IF? low injection? IF? you need to tune? 3 to 2.8 MHz? to? work the? 7 Mhz band .? ?BuT BUT with that IF then if you are doing SSB Upper you can inject? 4 Mhz and get? 14 Mhz out of your balanced modulator so working above the IF? as long as it? is ten is easy without having? an IF offset added in the brains of the MPU if you can call it brains. That way you can add a second port? (RF tranformer protected? !!)? on the? home built radio and you get access to a Digital? SIgnal source? about 200-? 160 mV PP? at? 200 ohm impedance for nothing.? There's not enough power in the signal to run? an ADE-1 mixer directly . THere is? enough power to drive the mixer in the SA 612. The great thing about it is it uses an encoder none of this push button left or rihgt to go up or down.? The RIT function utterly useless? because the? VFO does not know it is Tx or Rx mode ie what the Peckerhead switch on the? CW radio is doing.? assuming manual switching? in CW mode.? ?THe right hand Box header ports include 6 relay driver signals.? I m not sure if they are asserted = true? or sinking to GND if true.? YOu'd ahve to use the? ULN 2803? signal conversion relay driver chip or? Mosfets? to drive the relays as the PIC? ?( it's Pic Nbr 2? the RH one - I traced some of the pins through to PIC pins ) won't handle it.? What I'm unsure about if you do set it up with offsets is - do the realys trigger? on the REAL output frequency? or on the? basis of the offset frequency .? If it is on Real frequency then in example given you can't use those outputs to the? LPF filter selection because? the machine still thinks? it is near the? 80 mtr band when the heterodyne frequency is? 7 mhz in the example I gave? There? are? LEDS on theback of the board that? fire up as the? encoder? goes through the various bands .? I think there is? implementation for? 80 60? 40 then? 30 15? 10 mtrs? Obviously with a? 10 Mhz IF you can't receive? 30 mtrs but? if you had? 9 Mhz IF you could.? I put? some more? details of the instructions? I found? on the YT site? https://www.youtube.com/watch?v=L1L8ovRXlac&t=156s Look at my reply to Bokisan? .. do a sort if necessary.? I doubt if this Fake Canuk ever got anything going through lack of? mental discipline and bad aattitude.? ? Remember? ?Elwood and Jake and the visit to the? Penguin - ? * Bad attitudes and bad habits? * I think she said as she belted them with the ruler.? I thought the Jews had it bad in childhood.? IT's worse for the? Irish catholics in the so Called Parochial schools. in NY . The VFO button on the six? keys? selects VFO A or B - you can have one fixed? output frequency and one that you move with the encoder if you get hte idea BUT BUT there is only? one output RF port so you can't use the second signal as the? carrier injection oscillator.? # is used to enter a negative? number - as a prefix? for? IF_offset for example? ?and is also use as return key when you have yer 4x? 3 matrix keypad? attached.? The ONLY way to go into? into cal mode is to power down and HOLD Cal down and? then power up.? You have about? 1 second to start making changes or it will drop out of cal.? Every time it gets to the end of the cal sequence it does? a? save to? FLash? and that means the PIc is getting worn out every time you do it - up to 8000 cycles so doing a recal all the time is NOT a good idea.?? If you search the HamradioIndia.ORg site and look for CV Niras you will find a link to the original design? paper he wrote on the theing before the PRC people? grabbed the firware and started? turning them out.? A suitable clean up filter is? ?in Pi format? ?C1? 47 pF? L 4.7 uF? ?C2? 130 pf? ?L2? 4.7? uf? C3? 47 pf . THat? has a break point? ?at? 11 Mhz and is? 600 z in and 600 z out.? It's a butterworth.? ?If you want more power - and who does not then? the AD8009 chip? is a one stop solution for? up to? 200mW or so out.? Ditto the OPa 2674? which? has a? datasheet design that is eaily butchered for ham use. if using? Fets etc Suggest? J310? with? G to Ground of 10 K? and a source resistor? of? about? 250 R... all running on? 12 V with nothing in the Drain line to the fet? take the signal off? as? a small signal ac via 0.01 uF rF capacitor? ie? MLcc type leaded? or unleaded . STuff? muscle power? via ac coupling? that into the base of a 2n3053? with IC set for? 80mA? with a 2: 1 turns ratio output transformer? (and heatsink)? . I have done a sim using LTSpice it all looks mighty and powerful at? 10 Mhz? It will put at least 4mW into a minicircuits mixer? LO Port? (as simulated ).? ? Timothy E. Fidler : Engineer BE Mech Auckland?
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Timothy Fidler
