Hi,
I have identified regarding the performance of two different modem models, HL7692 and RC7620-1, in my device.
Upon conducting tests in the same location, using the same SIM card and operating on the same band, I observed a significant difference in the RSSI values between the two modems. Specifically, the HL7692 modem is displaying an RSSI value of 3, whereas the RC7620-1 modem is consistently showing an RSSI value of 18 under identical conditions.
It is crucial for me to ascertain whether one modem is indeed performing better than the other, and if so, the reasons behind this performance variance.
I am invested in resolving this matter to enhance the performance of our devices, and any assistance or guidance you can provide will be invaluable.
RC7620-1 output.
ATI
Manufacturer: Sierra Wireless, Incorporated
Model: RC7620-1
Revision: SWI9X07H_00.08.07.00 0ce4c1 jenkins 2021/03/17 02:18:20
IMEI: 353635110526114
IMEI SV: 17
FSN: 7T1522300913B0
+GCAP: +CGSM
OK
AT!GSTATUS?
!GSTATUS:
Current Time: 412 Temperature: 26
Modem Mitigate Level: 0 ModemProc Mitigate Level: 0
Reset Counter: 1 Mode: ONLINE
System mode: LTE PS state: Attached
IMS reg state: REGISTERED IMS mode: Normal
IMS Srv State: FULL SMS,FULL VoIP
LTE band: B8 LTE bw: 5 MHz
LTE Rx chan: 3626 LTE Tx chan: 21626
LTE CA state: INACTIVE
EMM state: Registered Normal Service
RRC state: RRC Idle
PCC RxM RSSI: -78 RSRP (dBm): -108
PCC RxD RSSI: -103 RSRP (dBm): -140
Tx Power: – TAC: A89B (43163)
RSRQ (dB): -16 Cell ID: 00A32351 (10691409)
SINR (dB): 0.8
OK
AT!BAND?
Index, Name
00, All bands
OK
AT+KSRAT?
+KSRAT: 0
AT+COPS?
+COPS: 0,2,“40478”,7
OK
AT+CSQ
+CSQ: 18,99
OK
HL7692 Output.
Manufacturer of modem: Sierra Wireless
Type of modem: HL7692
Modem firmware version: RHL769x.2.26.180400.201802141030.x7120m_1
IMEI: 355465071123067
Serial number: VE851441201510
Modem Baudrate: 115200
ati
HL7692
at+xcesq?
+XCESQ: 0,99,99,255,255,12,34,100
OK
AT+COPS?
+COPS: 0,2,“40478”,7
OK
!GSTATUS?
ERROR
AT+CSQ
+CSQ: 3,5
