User's Manual

16
2016-03-18
NUR-10W HW Implementation Guide v1.4
5 RF PARAMETERS
5.1 TX LEVEL
The maximum output power is +30dBm (1000mW). The power can be adjusted by 1dB steps. In total there
are 19 steps meaning the minimum output power value is +11dBm that equals to 13mW of power. When
using higher output power levels the antennas VSWR value becomes more and more important factor. High
output power combined together with antenna with poor VSWR leads to a situation where significant
portion of the power is reflected back to the receiver.
Table 9. TX power levels.
TX level
Power: dBm / mW
TX level
Power: dBm / mW
0
30 / 1000
10
20 / 100
1
29 / 794
11
19 / 79
2
28 / 631
12
18 / 63
3
27 / 500
13
17 / 50
4
26 / 398
14
16 / 40
5
25 / 316
15
15 / 32
6
24 / 251
16
14 / 25
7
23 / 200
17
13 / 20
8
22 / 158
18
12 / 16
9
21 / 126
19
11 / 13
5.2 RECEIVER SENSITIVITY
The maximum LBT sensitivity is -80dBm and maximum data sensitivity is -70dBm. The receiver can handle
+5dBm of power reflecting back to RF_OUT pin without having a big impact on the performance. Tolerance
to reflecting signal can be significantly increased using NUR-10W leakage cancellation functionality. The
receiver architecture uses direct conversion and it has an integrated AGC (automatic gain controller).
NUR-10W-module has also capability to adjust the sensitivity of the receiver. This can be useful is some
applications where you want to limit the read range without reducing the actual RF output power. There
are three steps. Low, nominal and high. Those corresponds to absolute sensitivity levels as follows; -50dBm,
-60dBm and -70dBm.