Hello,
I'm having difficulty getting the DS125DF1610 to generate a PRBS output without an input waveform. I am trying to verify the egress and ingress transmission paths of our system.
My setup is the following: 1st DS125DF1610: TX (PRBS Gen) -> QSFP -> Loopback -> QSFP -> 2nd DS125DF1610: RX (PRBS Check).
The transmitter and receiver are different devices. We have a differential 25MHz clock connected to REF_CLK_P/N with daisy chained CLK_MON_P/N output.
At this point frequency accuracy isn't a priority.
I have tried forcing Signal Detect and CDR Lock, both independently and together.
I've also tried enabling EN_CLK_LOOPTHRU_LV. I just can't seem to get the outputs to turn on.
I have provided a Register Dump of the Transmitter DS125DF1610 below. Will worry about the RX device next. Thanks in advance.
Shared Registers 0x00 0x00 0x01 0x71 0x02 0x00 0x03 0x00 0x04 0x01 0x05 0x08 0x06 0x00 0x07 0x05 0x08 0x00 0x09 0x00 0x0a 0x00 0x0b 0x40 0x0c 0x00 0x0d 0x81 0x0e 0x00 0x0f 0xff 0x10 0xff 0x11 0x00 Global Registers 0xFC 0x00 0xFD 0x00 0xFE 0x03 0xFF 0x00 Channel Registers 0x00 0x00 0x01 0x00 0x02 0x00 0x03 0x00 0x04 0x01 0x05 0x01 0x06 0x01 0x07 0x01 0x08 0x60 0x09 0x20 0x0A 0x50 0x0B 0x6f 0x0C 0x08 0x0D 0xb4 0x0E 0x93 0x0F 0x69 0x10 0x3a 0x11 0x20 0x12 0xe0 0x13 0x90 0x14 0x00 0x15 0x13 0x16 0x7a 0x17 0x36 0x18 0x40 0x19 0x20 0x1A 0xa0 0x1B 0x03 0x1C 0x90 0x1D 0x00 0x1E 0x91 0x1F 0x55 0x20 0x00 0x21 0x00 0x22 0x00 0x23 0x40 0x24 0x40 0x25 0x00 0x26 0x00 0x27 0x00 0x28 0x00 0x29 0x00 0x2A 0x30 0x2B 0x0f 0x2C 0xf2 0x2D 0x07 0x2E 0x00 0x2F 0xb6 0x30 0x08 0x31 0x40 0x32 0x11 0x33 0x88 0x34 0xbf 0x35 0x1f 0x36 0x30 0x37 0x00 0x38 0x00 0x39 0x00 0x3A 0x00 0x3B 0x43 0x3C 0x20 0x3D 0x2a 0x3E 0x00 0x3F 0x41 0x40 0x00 0x41 0x01 0x42 0x04 0x43 0x10 0x44 0x40 0x45 0x08 0x46 0x02 0x47 0x80 0x48 0x03 0x49 0x0c 0x4A 0x30 0x4B 0x41 0x4C 0x50 0x4D 0xc0 0x4E 0x60 0x4F 0x90 0x50 0x88 0x51 0x82 0x52 0xa0 0x53 0x46 0x54 0x52 0x55 0x8c 0x56 0xb0 0x57 0xc8 0x58 0x57 0x59 0x5d 0x5A 0x69 0x5B 0x75 0x5C 0xd5 0x5D 0x99 0x5E 0x96 0x5F 0xa5 0x60 0x00 0x61 0x00 0x62 0x00 0x63 0x00 0x64 0x00 0x65 0x00 0x66 0x00 0x67 0x20 0x68 0x00 0x69 0x0a 0x6A 0x22 0x6B 0x40 0x6C 0x00 0x6D 0x00 0x6E 0x00 0x6F 0x00 0x70 0x03 0x71 0x20 0x72 0x00 0x73 0x00 0x74 0x00 0x75 0x00 0x76 0x22 0x77 0x1a 0x78 0x00 0x79 0x30 0x7A 0x00 0x7B 0x00 0x7C 0x00 0x7D 0x48 0x7E 0x13 0x7F 0x3a 0x80 0x00 0x81 0xe4 0x82 0x00 0x83 0x00 0x84 0x00 0x85 0x00 0x86 0x00 0x87 0x00 0x88 0x00 0x89 0x03 0x8A 0xdb 0x8B 0x00 0x8C 0x00 0x8D 0x02 0x8E 0x3c 0x8F 0x00 0x90 0x00 0x91 0x00 0x92 0x00 0x93 0x00 0x94 0x00 0x95 0x00 0x96 0x1C 0x97 0x00 0x98 0x0c 0x99 0x3f 0x9A 0x3f 0x9B 0x00