AN241
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V0.4 | Page 33/41
No.
Function
Description
1
Frequency band
Display the selected frequency band as shown in the figure above. It indicates that the
start frequency of the selected frequency band is 865000kHz.
2
Modulation/
demodulation mode
Display the selected modulation/demodulation mode, as shown in the figure above,
indicating that the current modulation and demodulation mode is set to 2FSK.
3
Tx and Rx mode
Display the current Rx and Tx mode, TR indicates transmitting and receiving
alternative mode.
4
Chanel signal
Display the channel signal (value of Frequencry Channel) as shown in the figure
above, the channel signal is 0. Therefore, both of the operating frequency and starting
frequency is 865MHz.
5
Data rate/offset
parameter
Display the currently set data rate/frequency offset parameters. As shown in the figure
above, it indicates that the current setting rate is 20kbps and the frequency offset is +/ -
10khz.
6
Tx and Rx packet
counter
“
tx : xxxxx
”
dislay the active Tx packet numbers ( the maximum packet number is
9999);
“
rx : xxxxx
”
display the returned packet numbers (the returned packet has to be
consistent with the Tx packet)
7
Signal strength
Display the returned signal strength in dBm.
8
Operation guide
The corresponding K1~K5 operation guide is shown in the figure above
：
Short press K1(
), start/stop the active Tx mode;
Short press K2(
)
，
return to the upper menu.
Note
：
1. In active Tx mode, LED1 is on during packet transmitting and off after transmitting.
2. In the active transmission mode, LED2 and LED3 will flash and then off when the returned packets are
consistent with the transmission packet. If the contents of the received packets are inconsistent (or
doesn’t pass the CRC), only LED3 will be on and then off. Therefore, during the ping-pong test of the
evaluation, LED1, LED2, and LED3 will flash rhythmly.
Based on the screen shown in Figure 3-11, press K2 (Rx) to make CMT2310A enter the passive receiving
mode, and the display is updated as shown in Figure 3-13.
CM T2 31 0A EB GU I
86 5M Hz 2F SK T R 0 00
20 kbp s 10 kHz
r x : 0 00 24 - 05 8d Bm
4. Chanel signal
1. Frequency
band
2.
Modulation/demodula-
tion mode
5. Data rate/
Frequency offset
parameter
8. Operation
guide
3. Tx and Rx mode
Rssi
7. Signal
strength
6. TR packet
counter
Figure 3-13. Passive Rx Mode Interface
