User Manual

173
8111A–AVR–05/08
AT86RF231
Note: 1. Only required for CW mode, do not configure for PRBS mode.
2. Frame Buffer content varies for different modulation schemes.
The content of the Frame Buffer has to be defined for Continuous Transmission PRBS mode or
CW mode. To measure the power spectral density (PSD) mask of the transmitter it is recom-
mended to use a random sequence of maximum length for the PSDU data.
To measure CW signals it is necessary to write either 0x00 or 0xFF to the Frame Buffer, for
details refer to Table 20-2 on page 173.
Table 20-2. Frame Buffer Content for various Continuous Transmission Modulation Schemes
8 Register Access 0x01 R 0x08 Verify TRX_OFF state
9 Register Access 0x036 W 0x0F Enable Continuous Transmission Test Mode - step # 1
10
(1)
Register Access 0x0C W 0x03 Enable High Data Rate Mode, 2 Mb/s
11
(1)
Register Access 0x0A W 0xA7 Configure High Data Rate Mode
12
(2)
Frame Buffer
Write Access
W Write PSDU data (even for CW mode), refer to Table A-2
13 Register Access 0x1C W 0x54 Enable Continuous Transmission Test Mode - step # 2
14 Register Access 0x1C W 0x46 Enable Continuous Transmission Test Mode - step # 3
15 Register Access 0x02 W 0x09 Enable PLL_ON state
16 Interrupt event 0x0F R 0x01 Wait for IRQ_0 (PLL_LOCK)
17 Register Access 0x02 W 0x02 Initiate Transmission, enter BUSY_TX state
18 Measurement Perform measurement
19 Register Access 0x1C W 0x00 Disable Continuous Transmission Test Mode
20 RESET Reset AT86RF231
Step Action Frame Content Comment
12 Frame Buffer
Access
Random Sequence modulated RF signal
0x00 (each byte) f
CH
- 0.5 MHz, CW signal
0xFF (each byte) f
CH
+ 0.5 MHz, CW signal