Rainbow Electronics AT86RF231 User Manual
Page 173
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.
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
Register Access
0x0C
W
0x03
Enable High Data Rate Mode, 2 Mb/s
Register Access
0x0A
W
0xA7
Configure High Data Rate Mode
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