No supported tuner found : eZCAP SDR USB Dongle

[imranrajjad]

Hello,

my first post here, I am unable to get gr-gsm, kalibrate-sdr and rtl_test tools to work with an SDR dongle on Ubuntu 16.4 LTS running as a VM in VMWare.

The device information :

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Bus 001 Device 002: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x0bda Realtek Semiconductor Corp.
  idProduct          0x2838 RTL2838 DVB-T
  bcdDevice            1.00
  iManufacturer           1 Realtek
  iProduct                2 RTL2838UHIDIR
  iSerial                 3 00000001
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           34
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          4 USB2.0-Bulk&Iso
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              5 Bulk-In, Interface
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              5 Bulk-In, Interface
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  bNumConfigurations      2
Device Status:     0x0000
  (Bus Powered)

on running the rtl_test

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Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM
No supported tuner found
Enabled direct sampling mode, input 1
Supported gain values (1): 0.0 
Sampling at 2048000 S/s.
No E4000 tuner found, aborting.

strangely with another dongle I get this

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Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6 
[R82XX] PLL not locked!
Sampling at 2048000 S/s.
No E4000 tuner found, aborting.

and it is working with kalibrate-sdr and gr-gsm.

I even tried installing all the drivers again from this link

https://ubuntuforums.org/showthread.php?t=2035623

but to no avail.Strangle it works in Windows (host system). After a bit of googling around the tuner of this dongle is FC0012 and the vendor is EzCAP

thanks
Imran

[rtlsdrblog]

Are they both FC0012 dongles?

Probably the first one is just faulty if the tuner isn't being recognized.

[imranrajjad]

well today the tuner got detected and everything started working until I briefly unplugged it

The Tuner gets detected on the host system running Windows10. I am able to view data in SdrSharp but when I turn to my Ubuntu VM, the tuner does not get detected.

and NO, they are not the same, both dongles have different spectrum and different tuners, one is using Rafael and other is using FitiPower

[rtlsdrblog]

Perhaps the newer versions of the drivers don't support the FC0012 properly anymore. You might try Keenerds driver or other older drivers.

The FC0012 is not popular and barely used because it is not very good.

[Username]

I got with mine better results on VHF than the common black one.

[rtlsdrblog]

I got with mine better results on VHF than the common black one.

Interesting, you mean the FC0012 working better on VHF? What are differences?

[Username]

I received more Packed on ACARS. Sure there are many settings who can be adjusted like gain and other thinks but in general the Dongle received more. Maybe its is an FC0013?