Hi,
thanks for confirmation. We have used a “Rohde & Schwarz” SMBV100B Vector Signal Generator (8khZ .. 3 GHz) together with a BG95-M4. I have made one observation during RX testing I do not understand:
We set a continuous wave signal with the power of -60dBm.
The frequency setting I apply is according to the band/channel of the AT command entered.
e.g. LTE Band 8, channel 3625 has a DL-Frequency of 942.5 MHz.
We set the frequency at the signal generator to 942.5 MHz and get the following result:
AT+QRXFTM=1,“LTE BAND8”,3625,0,0,0
+QRXFTM: -623,-62
OK
If I change the frequency just 100kHz below or above, we get much better values.
For 942.4 MHz:
AT+QRXFTM=1,“LTE BAND8”,3625,0,0,0
+QRXFTM: -608,-60
OK
For 942.6 MHz:
AT+QRXFTM=1,“LTE BAND8”,3625,0,0,0
+QRXFTM: -608,-60
OK
Is our setup probably wrong? According to the image of the CMW500 setup (from the documentation of the EC200S) there has to be an offset of 500 kHz. Is probably the same offset required for the BG95-M4?
Best Regards,
Stefan