AN241
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CM T2 31 0A EB GU I
86 5M Hz 2F SK P N 000
20 kbp s 10 kHz
- 11 1d Bm
Rssi
2. Operation
guide
1. Signal
strength
Figure 3-6. Direct Rx mode interface
（
Receiving
）
No.
Function
Description
1
Signal strength
Displays the real-time signal strength in the current receiving state, in dBm
2
Operation guide
The corresponding K1~K5 operation guide is shown in the figure above
：
Short press K1
（
Rx /
）
and enter into / suspend Direct Rx mode
；
Short press K2
（
）
and return to the upper menu
（
that is, the main menu
）
Note
：
1. Since the CMT2310A-EM board is equipped with reserved Current Detect jumper terminals, the current
consumption under Rx mode of CMT2310A can be tested by combining this mode.
2. In this receiving mode, it can be used to dock the signal generator and evaluate the bit error rate (BER) of
CMT2310A by the PN9 sequence, which is used to evaluate the sensitivity of CMT2310A. The sensitivity
test is related to the rate/frequency offset parameter, so it needs to be set according to the rate and
frequency offset required by the target. In the test pin of CMT2310A-EM, GPIO3 is used as the output of
demodulation data stream, and GPIO2 is used as the synchronization clock signal of demodulation data
stream.
3. In the process of receiving, when the LED2 lights up, it indicates that it is in the receiving state and when it
exits the Rx state
，
the LED2 will be extinguished.
3.4 Only Tx Mode
After selecting the "Only Tx Mode", press K1 " " in the main interface to enter the only Tx Mode, as shown in
Figure 3-7 below.
