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Update HAL comment of AGC

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Bug: 179157665
Test: doc update only
Change-Id: I9395a68d3154e8b4e47fd2fb6b0d8f5f33e48805
This commit is contained in:
Yu-Han Yang 2021-02-02 10:13:52 -08:00
parent c2954f4e58
commit a23aa3ba71
3 changed files with 23 additions and 30 deletions
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2
current.txt
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@ -769,7 +769,7 @@ a64467bae843569f0d465c5be7f0c7a5b987985b55a3ef4794dd5afc68538650 android.hardwar
# ABI preserving changes to HALs during Android S
e042522daa4b5f7fd4a0a19bcdadb93c79a1b04c09ef2c9813a3a8941032f3f5 android.hardware.contexthub@1.0::IContexthub
c2f64133b83ede65c9939ef97ab5bd867b73faf3dba0e7e69f77c3c43d9e487e android.hardware.contexthub@1.0::IContexthubCallback
1ca372cd67d197df099e87616a613ba6ede6552638a603e18f86c8834302c3d1 android.hardware.gnss@1.0::IGnssMeasurementCallback
bda492ec4021d13869de72bd6f8c15c5837b78d6136b8d538efec5320573a5ec android.hardware.gnss@1.0::IGnssMeasurementCallback
6a271e493907e8ba20912e42771bd0d99ae45431a851d5675ef9496d02510a34 android.hardware.gnss@1.1::IGnssMeasurementCallback
2c331a9605f3a08d9c1e0a36169ca57758bc43c11a78ef3f3730509885e52c15 android.hardware.graphics.composer@2.4::IComposerClient
3da3ce039247872d95c6bd48621dbfdfa1c2d2a91a90f257862f87ee2bc46300 android.hardware.health@2.1::types

29
gnss/1.0/IGnssMeasurementCallback.hal
View file

@ -644,22 +644,19 @@ interface IGnssMeasurementCallback {
*/
double snrDb;
/**
* Automatic gain control (AGC) level. AGC acts as a variable gain
* amplifier adjusting the power of the incoming signal. The AGC level
* may be used to indicate potential interference. When AGC is at a
* nominal level, this value must be set as 0. Higher gain (and/or lower
* input power) must be output as a positive number. Hence in cases of
* strong jamming, in the band of this signal, this value must go more
* negative.
*
* Note: Different hardware designs (e.g. antenna, pre-amplification, or
* other RF HW components) may also affect the typical output of of this
* value on any given hardware design in an open sky test - the
* important aspect of this output is that changes in this value are
* indicative of changes on input signal power in the frequency band for
* this measurement.
*/
/**
* Automatic gain control (AGC) level. AGC acts as a variable gain amplifier adjusting the power
* of the incoming signal. The AGC level may be used to indicate potential interference. Higher
* gain (and/or lower input power) must be output as a positive number. Hence in cases of strong
* jamming, in the band of this signal, this value must go more negative. This value must be
* consistent given the same level of the incoming signal power.
*
* Note: Different hardware designs (e.g. antenna, pre-amplification, or other RF HW components)
* may also affect the typical output of this value on any given hardware design in an open sky
* test - the important aspect of this output is that changes in this value are indicative of
* changes on input signal power in the frequency band for this measurement.
*/
double agcLevelDb;
};

22
gnss/aidl/android/hardware/gnss/GnssMeasurement.aidl
View file

@ -547,20 +547,16 @@ parcelable GnssMeasurement {
double snrDb;
/**
* Automatic gain control (AGC) level. AGC acts as a variable gain
* amplifier adjusting the power of the incoming signal. The AGC level
* may be used to indicate potential interference. When AGC is at a
* nominal level, this value must be set as 0. Higher gain (and/or lower
* input power) must be output as a positive number. Hence in cases of
* strong jamming, in the band of this signal, this value must go more
* negative.
* Automatic gain control (AGC) level. AGC acts as a variable gain amplifier adjusting the power
* of the incoming signal. The AGC level may be used to indicate potential interference. Higher
* gain (and/or lower input power) must be output as a positive number. Hence in cases of strong
* jamming, in the band of this signal, this value must go more negative. This value must be
* consistent given the same level of the incoming signal power.
*
* Note: Different hardware designs (e.g. antenna, pre-amplification, or
* other RF HW components) may also affect the typical output of this
* value on any given hardware design in an open sky test - the
* important aspect of this output is that changes in this value are
* indicative of changes on input signal power in the frequency band for
* this measurement.
* Note: Different hardware designs (e.g. antenna, pre-amplification, or other RF HW components)
* may also affect the typical output of this value on any given hardware design in an open sky
* test - the important aspect of this output is that changes in this value are indicative of
* changes on input signal power in the frequency band for this measurement.
*/
double agcLevelDb;