Sub 1 GHz Transceiver Architecture Description
MKW01xxRM Reference Manual, Rev. 3, 04/2016
Freescale Semiconductor, Inc.
5-11
both cases (
AutoRxRestartOn=0
or
AutoRxRestartOn=1
), the receiver can also re-enter the
WAIT mode by setting RestartRx bit to 1. The user can decide to do so, to manually launch a
new AGC procedure.
— Continuous mode: upon reception of valid data, the user can decide to either leave the receiver
enabled with the same LNA gain, or to restart the procedure, by setting
RestartRx
bit to 1,
resuming the WAIT mode of the receiver, described above.
NOTE
•
The AGC procedure must be performed while receiving preamble in
FSK mode.
•
In OOK mode, the AGC will give better results if performed while
receiving a constant “1” sequence
The following figure illustrates the AGC behavior:
Figure 5-5. AGC Thresholds Settings
The following table summarizes the typical performance of the complete receiver:
Table 5-4. Receiver Performance Summary
Input Power
Pin
Gain
Setting
Receiver Performance (typ)
P
-1dB
[dBm]
NF
[dB]
IIP3
[dBm]
IIP2
[dBm]
Pin < AgcThresh1
G1
-37
7
-18
+35
AgcThresh1 < Pin < AgcThresh2
G2
-31
13
-15
+40
AgcThresh2 < Pin < AgcThresh3
G3
-26
18
-8
+48
AgcThresh3 < Pin < AgcThresh4
G4
-14
27
-1
+62
AgcThresh4 < Pin < AgcThresh5
G5
>-6
36
+13
+68
AgcThresh5 < Pin
G6
>0
44
+20
+75
Towards
- 125 dBm
A
G
C
R
ef
er
en
ce
A
gc
T
hr
es
h1
A
gc
T
hr
es
h2
A
gc
T
hr
es
h3
A
gc
T
hr
es
h4
Pin[ dBm]
A
gc
T
hr
es
h5
16dB
7dB
11dB
9dB
11dB
G1
G2
G3
G4
G5
G6
Higher Sensitivity
Lower Linearity
Lower Noise Figure
Lower Sensitivity
Higher Linearity
Higher Noise Figure
Содержание MKW01Z128
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