Where can I find information about the power use difference between the RC7611 and RC7611-1? I checked the datasheet and it only lists power use for the RC7611.
The RC7611-1 must use less power than the RC7611, right?
Hi @dstotz,
Is “power” which you mentioned power supply or power consumption?
a, Following document “AirPrime - RC76xx - Product Technical Specification”(you can get this document at link: AirPrime - RC76xx - Product Technical Specification), RC76xx operates using DC power supplied(3.7V nominal) via the VBAT_RF and VBAT_BB signals.
This document does not mention that RC7611 and RC7611-1 use different power, so I think they are the same.
b, You can refer power consumption information in above document from page 28.
Thanks,
Yeah, I checked that datasheet and also saw that RC7611-1 is not listed.
I guess this means that the RC7611-1 uses the same power that the RC7611 does.
This seems very odd though, other CAT1 devices show lower power use than their CAT4 counterparts.
Hi @dstotz,
Currently, I only have RC7611 module, I cannot try to check on RC7611-1 module. So if you have both of modules, you can compare their power following below log:
08:27:17.059 on 10-May-2021> at+gmm 08:27:19.434 on 10-May-2021> 08:27:19.434 on 10-May-2021> RC7611 08:27:19.434 on 10-May-2021> 08:27:19.434 on 10-May-2021> OK 08:27:19.434 on 10-May-2021> at!entercnd=<password> 08:27:21.728 on 10-May-2021> 08:27:21.879 on 10-May-2021> OK 08:27:21.879 on 10-May-2021> at!pcinfo? 08:27:25.183 on 10-May-2021> 08:27:25.183 on 10-May-2021> State: Online 08:27:25.183 on 10-May-2021> LPM voters - Temp:0, Volt:0, User:0, W_DISABLE:0, IMSWITCH:0, BIOS:0, LWM2M:0, OMADM:0, FOTA:0, RFCAL:0 08:27:25.183 on 10-May-2021> LPM persistence - None 08:27:25.183 on 10-May-2021> 08:27:25.183 on 10-May-2021> OK 08:27:25.183 on 10-May-2021> at!pcvolt? 08:27:31.877 on 10-May-2021> 08:27:31.877 on 10-May-2021> Volt state: Normal 08:27:31.877 on 10-May-2021> Power supply voltage: 4209 mV (ADC: 39004) 08:27:31.877 on 10-May-2021> 08:27:31.877 on 10-May-2021> OK 08:27:31.877 on 10-May-2021> at!pcvoltlimits? 08:27:38.819 on 10-May-2021> 08:27:38.819 on 10-May-2021> HI CRIT: 4400 08:27:38.819 on 10-May-2021> HI NORM: 4300 08:27:38.819 on 10-May-2021> LO NORM: 3700 08:27:38.819 on 10-May-2021> LO WARN: 3200 08:27:38.819 on 10-May-2021> LO CRIT: 2800 08:27:38.819 on 10-May-2021> 08:27:38.819 on 10-May-2021> OK 08:27:38.819 on 10-May-2021> at!gstatus? 08:27:42.829 on 10-May-2021> 08:28:09.033 on 10-May-2021> !GSTATUS: 08:28:09.033 on 10-May-2021> Current Time: 227895 Temperature: 26 08:28:09.033 on 10-May-2021> Modem Mitigate Level: 0 ModemProc Mitigate Level: 0 08:28:09.033 on 10-May-2021> Reset Counter: 1 Mode: ONLINE 08:28:09.033 on 10-May-2021> System mode: LTE PS state: Not attached 08:28:09.033 on 10-May-2021> IMS reg state: NOT REGISTERED IMS mode: Normal 08:28:09.033 on 10-May-2021> IMS Srv State: NO SMS,NO VoIP 08:28:09.033 on 10-May-2021> LTE band: No band LTE bw: Unknown 08:28:09.033 on 10-May-2021> LTE Rx chan: 500 LTE Tx chan: --- 08:28:09.033 on 10-May-2021> LTE CA state: ACTIVE LTE Scell band:B40 08:28:09.033 on 10-May-2021> LTE Scell bw:Unknown LTE Scell chan: --- 08:28:09.033 on 10-May-2021> EMM state: Deregistered No Cell 08:28:09.033 on 10-May-2021> RRC state: RRC Idle 08:28:09.033 on 10-May-2021> 08:28:09.033 on 10-May-2021> PCC RxM RSSI: 0 RSRP (dBm): 0 08:28:09.033 on 10-May-2021> PCC RxD RSSI: 0 RSRP (dBm): 0 08:28:09.033 on 10-May-2021> SCC RxM RSSI: 0 RSRP (dBm): 0 08:28:09.033 on 10-May-2021> SCC RxD RSSI: 0 RSRP (dBm): 0 08:28:09.033 on 10-May-2021> Tx Power: -- TAC: 7C14 (31764) 08:28:09.033 on 10-May-2021> RSRQ (dB): -3224 Cell ID: 000001F4 (500) 08:28:09.033 on 10-May-2021> SINR (dB): 0 08:28:09.033 on 10-May-2021> 08:28:09.033 on 10-May-2021> OK
This log is get on my RC7611 module attaching to MangOH Red and not registering network.
You should put your RC7611 and RC7611-1 module in the same condition and check them.
Please feel free to share any concerns you have. Help us tick Solution if your question is answered.
Thanks,
I presume the difference in current draw between CAT-1 and CAT-4 operation would only exist to compare during a data transfer. Page 36 of the Technical Specification rev 5.1 shows the current draw during data transmission. The only way to get this data is by measuring current draw when in data transmission activity. The current draw during data transmission would be pulsed (not continuous) and would need to be displayed on an oscilloscope. Also since CAT-4 is faster, it would spend less time sending data, and the average energy used for a specific data amount might be similar. (volts * current * time, or just current * time because voltage is the same)
Its a difficult question to answer.
As @sales implied the current draw is going to vary in an operational sense as the cat4 device has higher throughput both up and down (as it has higher order modulation schemes implemented to achieve this) so for a given amount of data you will see a shorter transmit/receive time and hence lower overall consumed power, but, the instantaneous current draw (as quoted in the PTS) will be the same between the devices as they will be transmitting/receiving in the same frequencies/bands just at lower rates.
Regards
Matt
Yes. I assumed the CAT-4 module would draw higher current for higher throughput, but that might not be, or not very much. The faster module might end up being more economical with average energy use due to sending/receiving a given data session faster.
That is why I mentioned I would an oscilloscope. For an approximate comparison I would use a low value series resistor in series with the power supply, as a current shunt (such that peak expected current would drop about 100 mV) followed by a low pass RC filter between it and the oscilloscope. This would plot the average current draw over the time to send/receive data. I would be looking to compare current over the time to send/receive a specific data session. If the power supply has a common ground, you would put the shunt in series with the ground power lead, and with the oscilloscope ground on the power supply side.
Thanks for the responses! Sounds like what I am seeing is expected. This can be closed as resolved.