HF antenna is UNUSABLE

[duckie37]

Hello. So I broke out my Proxmark 3 v4.01, and updated and I am unable to detect any HF RFID tags. I have tried two antennas on this and reflashed it. I haven't done HF before so I couldn't tell you if it was working out of the box plus I purchased it long ago.

When I run data tune it says the HF Antenna us UNUSABLE. LF is fine. Only other thing that maybe I thought was strange is when I do an HF tune I get this. Isn't it supposed to be 32 mV or is this too high? I

[usb] pm3 --> hf tune [=] Measuring HF antenna, click pm3 button or press Enter to exit [=] 64 mV / 0 V / 0 Vmax

---

usb] pm3 --> data tune [=] ---------- Reminder ------------------------ [=] hw tune doesn't actively tune your antennas, [=] it's only informative. [=] Measuring antenna characteristics, please wait... 🕛 9 [=] ---------- LF Antenna ---------- [+] LF antenna: 37.05 V - 125.00 kHz [+] LF antenna: 29.09 V - 134.83 kHz [+] LF optimal: 37.05 V - 125.00 kHz [+] Approx. Q factor (): 5.6 by frequency bandwidth measurement [+] Approx. Q factor (): 6.5 by peak voltage measurement [+] LF antenna is OK [=] ---------- HF Antenna ---------- [!] ⚠️ HF antenna is UNUSABLE

---

(*) Q factor must be measured without tag on the antenna

[+] Displaying LF tuning graph. Divisor 88 (blue) is 134.83 kHz, 95 (red) is 125.00 kHz

[usb] pm3 --> hw status [#] Memory [#] BigBuf_size............. 40904 [#] Available memory........ 37060 [#] Tracing [#] tracing ................ 0 [#] traceLen ............... 68 [#] Current FPGA image [#] mode.................... HF image 2s30vq100 2022-03-23 17:21:16 [#] Flash memory [#] Baudrate................ 24 MHz [#] Init.................... OK [#] Memory size............. 2 mbits / 256 kb [#] Unique ID............... 0xD567A882A79D8825 [#] Smart card module (ISO 7816) [#] version................. v3.10 [#] LF Sampling config [#] [q] divisor............. 95 ( 125.00 kHz ) [#] [b] bits per sample..... 8 [#] [d] decimation.......... 1 [#] [a] averaging........... yes [#] [t] trigger threshold... 0 [#] [s] samples to skip..... 0 [#] [#] LF T55XX config [#] [r] [a] [b] [c] [d] [e] [f] [g] [#] mode |start|write|write|write| read|write|write [#] | gap | gap | 0 | 1 | gap | 2 | 3 [#] ---------------------------+-----+-----+-----+-----+-----+-----+------ [#] fixed bit length (default) | 29 | 17 | 15 | 47 | 15 | N/A | N/A | [#] long leading reference |N/A | N/A | N/A | N/A | N/A | N/A | N/A | [#] leading zero |N/A | N/A | N/A | N/A | N/A | N/A | N/A | [#] 1 of 4 coding reference |N/A | N/A | N/A | N/A | N/A | N/A | N/A | [#] [#] HF 14a config [#] [a] Anticol override.... std ( follow standard ) [#] [b] BCC override........ std ( follow standard ) [#] [2] CL2 override........ std ( follow standard ) [#] [3] CL3 override........ std ( follow standard ) [#] [r] RATS override....... std ( follow standard ) [#] Transfer Speed [#] Sending packets to client... [#] Time elapsed................... 500ms [#] Bytes transferred.............. 283136 [#] Transfer Speed PM3 -> Client... 566272 bytes/s [#] Various [#] Max stack usage......... 4088 / 8480 bytes [#] Debug log level......... 1 ( error ) [#] ToSendMax............... 1 [#] ToSend BUFFERSIZE....... 2308 [#] Slow clock.............. 31015 Hz [#] Installed StandAlone Mode [#] LF HID26 standalone - aka SamyRun (Samy Kamkar) [#] Flash memory dictionary loaded [#]

---

[usb] pm3 --> hw status [#] Memory [#] BigBuf_size............. 40904 [#] Available memory........ 37060 [#] Tracing [#] tracing ................ 0 [#] traceLen ............... 68 [#] Current FPGA image [#] mode.................... HF image 2s30vq100 2022-03-23 17:21:16 [#] Flash memory [#] Baudrate................ 24 MHz [#] Init.................... OK [#] Memory size............. 2 mbits / 256 kb [#] Unique ID............... 0xD567A882A79D8825 [#] Smart card module (ISO 7816) [#] version................. v3.10 [#] LF Sampling config [#] [q] divisor............. 95 ( 125.00 kHz ) [#] [b] bits per sample..... 8 [#] [d] decimation.......... 1 [#] [a] averaging........... yes [#] [t] trigger threshold... 0 [#] [s] samples to skip..... 0 [#] [#] LF T55XX config [#] [r] [a] [b] [c] [d] [e] [f] [g] [#] mode |start|write|write|write| read|write|write [#] | gap | gap | 0 | 1 | gap | 2 | 3 [#] ---------------------------+-----+-----+-----+-----+-----+-----+------ [#] fixed bit length (default) | 29 | 17 | 15 | 47 | 15 | N/A | N/A | [#] long leading reference |N/A | N/A | N/A | N/A | N/A | N/A | N/A | [#] leading zero |N/A | N/A | N/A | N/A | N/A | N/A | N/A | [#] 1 of 4 coding reference |N/A | N/A | N/A | N/A | N/A | N/A | N/A | [#] [#] HF 14a config [#] [a] Anticol override.... std ( follow standard ) [#] [b] BCC override........ std ( follow standard ) [#] [2] CL2 override........ std ( follow standard ) [#] [3] CL3 override........ std ( follow standard ) [#] [r] RATS override....... std ( follow standard ) [#] Transfer Speed [#] Sending packets to client... [#] Time elapsed................... 500ms [#] Bytes transferred.............. 281600 [#] Transfer Speed PM3 -> Client... 563200 bytes/s [#] Various [#] Max stack usage......... 4088 / 8480 bytes [#] Debug log level......... 1 ( error ) [#] ToSendMax............... 1 [#] ToSend BUFFERSIZE....... 2308 [#] Slow clock.............. 31015 Hz [#] Installed StandAlone Mode [#] LF HID26 standalone - aka SamyRun (Samy Kamkar) [#] Flash memory dictionary loaded

[iceman1001]

Check the screws? flash latest source, run same client and firmware from same build?

side note, follow the guides on this repo to setup your rdv4 properly

[duckie37]

Still a problem. Ok, I'm sure I followed the guides on setup and thought I had the latest but I went ahead and did it again. Sorry, I think I forgot to post the firmware and software versions on my first post. Tried 3 antennas all bolted down well. I am starting to think it's an HW issue or there would be more posts with this release. Is there a way to test the antenna with a volt meter while running tune or other commands (e.g. Voltage drop or Ohmz while it's running a test?)

[ Proxmark3 RFID instrument ]

MCU....... AT91SAM7S512 Rev A
Memory.... 512 Kb ( 65% used )

Client.... Iceman/master/v4.14831-976-g8b4701efe 2022-10-07 10:36:55
Bootrom... Iceman/master/v4.14831-976-g8b4701efe 2022-10-07 10:35:53
OS........ Iceman/master/v4.14831-976-g8b4701efe 2022-10-07 10:36:37
Target.... RDV4

[iceman1001]

Ping! Does this still occur for you?

[duckie37]

Hey sorry. I haven't got back to this but after re-flashing a few times and trying a few other antennas from another friends kit I am convinced that I have a hardware problem somewhere. I will close this out unless there is more info you would like to see.