Modem Control platform constraints
Signal strength
On Qualcomm-based platform, the signal strength indication delta resolution set in le_mrc_SetSignalStrengthIndDelta() API depends on the Radio Access Technology (RAT) used.
For TD-SCDMA RAT technology, the signal delta is set with steps of 1 dBm with a minimum of one dBm. Intermediate values less than 1 dBm are rounded. For the other RAT technologies, the signal delta is set with steps of 0.1 dBm with a minimum of 0.1 dBm.
For example, to set a signal strength indication delta of 10.6 dBm, the delta value must be set to
- This value is rounded to 11 dBm for TD-SCDMA RAT technology. (105 would have been equivalent to 10dBm on TD-SCDMA).
Under TD-SCDMA RAT technology, a delta value less than 10 is forbiden.
APN Length
To set the Access Point Name (APN) for the given profile, le_mdc_SetAPN() API is used.
The maximum APN length is limited by the platform.
| AR755x | AR758x | AR759x | AR8652 | WP750x | WP76xx | WP77xx | WP8548 | |
|---|---|---|---|---|---|---|---|---|
| Maxmium APN length | 62 | 62 | 100 |
Mobile Terminated PDP context
The Mobile Terminated Packet Data Protocol (PDP) context feature is not supported on all platforms. The table below indicates on which platform the feature is supported. ('X' means the feature is supported)
| AR7 | AR755x | AR758x | AR759x | AR8652 | WPx5xx | WP750x | WP76xx | WP77xx | WP85xx | |
|---|---|---|---|---|---|---|---|---|---|---|
| MT-PDP context feature | X | X | X | X |
Jamming detection
The jamming detection feature is supported on following platforms:
| AR755x | AR758x | AR759x | AR8652 | WP750x | WP76xx | WP77xx | WP8548 | |
|---|---|---|---|---|---|---|---|---|
| Jamming detection support | X |
SAR backoff
The SAR backoff state is not supported by all platforms. Also, the maximum number of states may be different among platforms.
| AR755x | AR758x | AR759x | AR8652 | WP750x | WP76xx | WP77xx | WP8548 | |
|---|---|---|---|---|---|---|---|---|
| SAR backoff state feature | X | X | ||||||
| SAR maximum number of states | 8 | 8 |
PCI Network Scan
The PCI scan is not supported by all platforms. The table below indicates on which platform the fature is available. Also, only LTE PCI scan is supported.
| AR755x | AR758x | AR759x | AR8652 | WP750x | WP76xx | WP77xx | WP8548 | |
|---|---|---|---|---|---|---|---|---|
| LTE PCI scan feature | X | X | X |
In order to perform an LTE PCI scan, ensure that only LE_MRC_BITMASK_RAT_LTE is enabled in the RAT preference settings before starting the scan. The configuration can be done using:
- AT command: AT!SELRAT=06
- CM tool: cm radio rat LTE
- Legato API: le_mrc_SetRatPreferences(LE_MRC_BITMASK_RAT_LTE).
See Modem Radio Control API
See Modem Data Control API
Copyright (C) Sierra Wireless Inc.