3.8.2 BER Test Mode

Configure the BER Test mode to transmit or receive a pseudo random PN31 (which was PN9 and PN23 in ATA8350 UWB device) data sequence. In the transmitting device, this Test mode is enabled with the setting in the following table for the registers described in A21 – GPO Test Register (used for debugging and validation only) and A19 – Digital Control Register.

Table 3-6. Settings for Register A21 and A19
Configuration BitsBit Description
A21 Register
DIG_PN_Stream

= 1: Enable BER Test mode; devices must be in the TX and RX modes; TX sends PN31 data (ITU-T 0.150 (05/96)); RX checks the accuracy of the sequence; if the incorrect GPO pin is set, PN generation starts with the TX/RX mode (to exit this mode, the device must reset)

A19 Register

DIG_RXPR_TXVR

DIG_RXoRXPR_enable

DIG_XoX_PRVR

DIG_PostAmble_en

These bits enable:

TX mode = 0010

DIG_PulseLength[2:0]Pulse repetition rate = 111