attenuator

package

v0.0.0-...-683b059 Latest Latest Go to latest Published: Apr 23, 2022 License: BSD-3-Clause Imports: 9 Imported by: 0

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Repository

chromium.googlesource.com/chromiumos/platform/tast-tests

Documentation ¶

Overview ¶

Package attenuator controls of the Mini-Circuits RC4DAT programmable attenuator. It provides also a best-effort support for RCDAT, but due to lack the test sample, nothing is guaranteed.

Index ¶

Variables
type Attenuator
- func Open(ctx context.Context, host string, proxyConn *ssh.Conn) (att *Attenuator, errRet error)

Constants ¶

This section is empty.

Variables ¶

View Source

var HostFixedAttenuations = attData{

	"chromeos1-dev-host4-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 59},
		1: {2437: 56, 5220: 56, 5765: 56},
		2: {2437: 53, 5220: 59, 5765: 59},
		3: {2437: 57, 5220: 56, 5765: 56}},
	"chromeos1-dev-host15-attenuator": {
		0: {2437: 32, 5220: 36, 5765: 38},
		1: {2437: 35, 5220: 34, 5765: 36},
		2: {2437: 32, 5220: 36, 5765: 38},
		3: {2437: 35, 5220: 34, 5765: 36}},
	"chromeos1-dev-host16-attenuator": {
		0: {2437: 32, 5220: 37, 5765: 39},
		1: {2437: 35, 5220: 34, 5765: 36},
		2: {2437: 32, 5220: 37, 5765: 39},
		3: {2437: 35, 5220: 34, 5765: 36}},
	"chromeos1-dev-host17-attenuator": {
		0: {2437: 33, 5220: 36, 5765: 38},
		1: {2437: 35, 5220: 34, 5765: 36},
		2: {2437: 33, 5220: 36, 5765: 38},
		3: {2437: 35, 5220: 34, 5765: 36}},
	"chromeos1-dev-host18-attenuator": {
		0: {2437: 32, 5220: 36, 5765: 37},
		1: {2437: 35, 5220: 34, 5765: 35},
		2: {2437: 32, 5220: 36, 5765: 37},
		3: {2437: 35, 5220: 34, 5765: 35}},
	"chromeos1-dev-host19-attenuator": {
		0: {2437: 52, 5220: 57, 5765: 60},
		1: {2437: 55, 5220: 54, 5765: 56},
		2: {2437: 52, 5220: 57, 5765: 60},
		3: {2437: 55, 5220: 54, 5765: 55}},
	"chromeos1-dev-host20-attenuator": {
		0: {2437: 53, 5220: 57, 5765: 62},
		1: {2437: 57, 5220: 55, 5765: 55},
		2: {2437: 53, 5220: 57, 5765: 61},
		3: {2437: 57, 5220: 55, 5765: 55}},
	"chromeos1-test-host2-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 58},
		1: {2437: 57, 5220: 57, 5765: 59},
		2: {2437: 53, 5220: 59, 5765: 58},
		3: {2437: 57, 5220: 57, 5765: 59}},

	"chromeos15-row3-rack7-host1-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 59},
		1: {2437: 56, 5220: 56, 5765: 58},
		2: {2437: 53, 5220: 58, 5765: 60},
		3: {2437: 56, 5220: 56, 5765: 57}},
	"chromeos15-row3-rack7-host2-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 59},
		1: {2437: 56, 5220: 57, 5765: 58},
		2: {2437: 53, 5220: 58, 5765: 60},
		3: {2437: 56, 5220: 57, 5765: 56}},
	"chromeos15-row3-rack7-host3-attenuator": {
		0: {2437: 53, 5220: 58, 5765: 60},
		1: {2437: 56, 5220: 56, 5765: 56},
		2: {2437: 53, 5220: 58, 5765: 60},
		3: {2437: 56, 5220: 56, 5765: 56}},
	"chromeos15-row3-rack7-host4-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 60},
		1: {2437: 57, 5220: 56, 5765: 58},
		2: {2437: 53, 5220: 59, 5765: 60},
		3: {2437: 57, 5220: 56, 5765: 58}},
	"chromeos15-row3-rack7-host5-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 59},
		1: {2437: 56, 5220: 56, 5765: 57},
		2: {2437: 52, 5220: 59, 5765: 58},
		3: {2437: 56, 5220: 56, 5765: 57}},
	"chromeos15-row3-rack7-host6-attenuator": {
		0: {2437: 53, 5220: 58, 5765: 59},
		1: {2437: 56, 5220: 57, 5765: 57},
		2: {2437: 52, 5220: 58, 5765: 58},
		3: {2437: 56, 5220: 56, 5765: 56}},

	"chromeos15-row3-rack8-host1-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 58},
		1: {2437: 56, 5220: 57, 5765: 59},
		2: {2437: 52, 5220: 59, 5765: 58},
		3: {2437: 56, 5220: 57, 5765: 59}},
	"chromeos15-row3-rack8-host2-attenuator": {
		0: {2437: 52, 5220: 59, 5765: 59},
		1: {2437: 56, 5220: 56, 5765: 60},
		2: {2437: 52, 5220: 58, 5765: 60},
		3: {2437: 56, 5220: 56, 5765: 59}},
	"chromeos15-row3-rack8-host3-attenuator": {
		0: {2437: 52, 5220: 58, 5765: 59},
		1: {2437: 56, 5220: 56, 5765: 60},
		2: {2437: 52, 5220: 58, 5765: 59},
		3: {2437: 56, 5220: 56, 5765: 57}},
	"chromeos15-row3-rack8-host4-attenuator": {
		0: {2437: 52, 5220: 58, 5765: 60},
		1: {2437: 56, 5220: 56, 5765: 58},
		2: {2437: 52, 5220: 58, 5765: 58},
		3: {2437: 56, 5220: 56, 5765: 56}},
	"chromeos15-row3-rack8-host5-attenuator": {
		0: {2437: 53, 5220: 58, 5765: 58},
		1: {2437: 56, 5220: 56, 5765: 57},
		2: {2437: 53, 5220: 59, 5765: 58},
		3: {2437: 56, 5220: 56, 5765: 60}},
	"chromeos15-row3-rack8-host6-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 59},
		1: {2437: 56, 5220: 56, 5765: 57},
		2: {2437: 53, 5220: 60, 5765: 59},
		3: {2437: 56, 5220: 58, 5765: 58}},

	"chromeos15-row3-rack9-host1-attenuator": {
		0: {2437: 53, 5220: 60, 5765: 59},
		1: {2437: 57, 5220: 57, 5765: 58},
		2: {2437: 53, 5220: 59, 5765: 60},
		3: {2437: 57, 5220: 57, 5765: 60}},
	"chromeos15-row3-rack9-host2-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 59},
		1: {2437: 57, 5220: 58, 5765: 60},
		2: {2437: 53, 5220: 58, 5765: 58},
		3: {2437: 57, 5220: 58, 5765: 61}},
	"chromeos15-row3-rack9-host3-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 59},
		1: {2437: 57, 5220: 58, 5765: 59},
		2: {2437: 53, 5220: 58, 5765: 59},
		3: {2437: 57, 5220: 58, 5765: 60}},
	"chromeos15-row3-rack9-host4-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 59},
		1: {2437: 57, 5220: 58, 5765: 60},
		2: {2437: 53, 5220: 58, 5765: 59},
		3: {2437: 57, 5220: 57, 5765: 60}},
	"chromeos15-row3-rack9-host5-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 59},
		1: {2437: 57, 5220: 58, 5765: 59},
		2: {2437: 53, 5220: 58, 5765: 60},
		3: {2437: 57, 5220: 58, 5765: 60}},
	"chromeos15-row3-rack9-host6-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 59},
		1: {2437: 57, 5220: 57, 5765: 60},
		2: {2437: 53, 5220: 59, 5765: 60},
		3: {2437: 57, 5220: 58, 5765: 58}},
	"chromeos15-row3-rack10-host1-attenuator": {
		0: {2437: 52, 5220: 55, 5765: 56},
		1: {2437: 55, 5220: 53, 5765: 57},
		2: {2437: 52, 5220: 55, 5765: 57},
		3: {2437: 55, 5220: 53, 5765: 57}},
	"chromeos15-row3-rack10-host2-attenuator": {
		0: {2437: 52, 5220: 56, 5765: 58},
		1: {2437: 55, 5220: 54, 5765: 58},
		2: {2437: 52, 5220: 56, 5765: 58},
		3: {2437: 55, 5220: 54, 5765: 57}},
	"chromeos15-row3-rack10-host3-attenuator": {
		0: {2437: 52, 5220: 55, 5765: 60},
		1: {2437: 55, 5220: 54, 5765: 59},
		2: {2437: 52, 5220: 55, 5765: 61},
		3: {2437: 55, 5220: 53, 5765: 59}},
	"chromeos15-row3-rack10-host4-attenuator": {
		0: {2437: 51, 5220: 55, 5765: 59},
		1: {2437: 55, 5220: 53, 5765: 58},
		2: {2437: 51, 5220: 54, 5765: 59},
		3: {2437: 55, 5220: 53, 5765: 58}},
	"chromeos15-row3-rack10-host5-attenuator": {
		0: {2437: 51, 5220: 55, 5765: 60},
		1: {2437: 55, 5220: 53, 5765: 58},
		2: {2437: 51, 5220: 55, 5765: 60},
		3: {2437: 55, 5220: 53, 5765: 58}},
	"chromeos15-row3-rack10-host6-attenuator": {
		0: {2437: 52, 5220: 55, 5765: 57},
		1: {2437: 55, 5220: 54, 5765: 59},
		2: {2437: 52, 5220: 55, 5765: 57},
		3: {2437: 55, 5220: 54, 5765: 57}},
	"chromeos15-row3-rack11-host1-attenuator": {
		0: {2437: 53, 5220: 58, 5765: 57},
		1: {2437: 56, 5220: 56, 5765: 58},
		2: {2437: 53, 5220: 58, 5765: 57},
		3: {2437: 56, 5220: 56, 5765: 57}},
	"chromeos15-row3-rack11-host2-attenuator": {
		0: {2437: 53, 5220: 58, 5765: 56},
		1: {2437: 56, 5220: 56, 5765: 58},
		2: {2437: 53, 5220: 59, 5765: 56},
		3: {2437: 56, 5220: 56, 5765: 56}},
	"chromeos15-row3-rack11-host3-attenuator": {
		0: {2437: 52, 5220: 57, 5765: 59},
		1: {2437: 55, 5220: 55, 5765: 54},
		2: {2437: 52, 5220: 57, 5765: 59},
		3: {2437: 55, 5220: 55, 5765: 54}},
	"chromeos15-row3-rack11-host4-attenuator": {
		0: {2437: 52, 5220: 58, 5765: 59},
		1: {2437: 56, 5220: 56, 5765: 55},
		2: {2437: 52, 5220: 57, 5765: 59},
		3: {2437: 56, 5220: 56, 5765: 55}},
	"chromeos15-row3-rack11-host5-attenuator": {
		0: {2437: 53, 5220: 58, 5765: 58},
		1: {2437: 55, 5220: 56, 5765: 55},
		2: {2437: 53, 5220: 58, 5765: 59},
		3: {2437: 56, 5220: 55, 5765: 55}},
	"chromeos15-row3-rack11-host6-attenuator": {
		0: {2437: 52, 5220: 58, 5765: 59},
		1: {2437: 55, 5220: 55, 5765: 54},
		2: {2437: 52, 5220: 57, 5765: 59},
		3: {2437: 55, 5220: 55, 5765: 54}},
	"chromeos15-row3-rack12-host1-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 58},
		1: {2437: 55, 5220: 57, 5765: 55},
		2: {2437: 57, 5220: 59, 5765: 58},
		3: {2437: 55, 5220: 56, 5765: 55}},
	"chromeos15-row3-rack12-host2-attenuator": {
		0: {2437: 52, 5220: 59, 5765: 56},
		1: {2437: 55, 5220: 56, 5765: 55},
		2: {2437: 52, 5220: 59, 5765: 57},
		3: {2437: 55, 5220: 56, 5765: 55}},
	"chromeos15-row3-rack12-host3-attenuator": {
		0: {2437: 52, 5220: 58, 5765: 57},
		1: {2437: 55, 5220: 57, 5765: 55},
		2: {2437: 52, 5220: 59, 5765: 59},
		3: {2437: 55, 5220: 59, 5765: 55}},
	"chromeos15-row3-rack12-host4-attenuator": {
		0: {2437: 52, 5220: 58, 5765: 56},
		1: {2437: 55, 5220: 56, 5765: 55},
		2: {2437: 52, 5220: 58, 5765: 56},
		3: {2437: 55, 5220: 56, 5765: 56}},
	"chromeos15-row3-rack12-host5-attenuator": {
		0: {2437: 53, 5220: 59, 5765: 58},
		1: {2437: 55, 5220: 56, 5765: 55},
		2: {2437: 52, 5220: 59, 5765: 59},
		3: {2437: 55, 5220: 56, 5765: 55}},
	"chromeos15-row3-rack12-host6-attenuator": {
		0: {2437: 52, 5220: 59, 5765: 57},
		1: {2437: 55, 5220: 56, 5765: 55},
		2: {2437: 52, 5220: 58, 5765: 56},
		3: {2437: 55, 5220: 56, 5765: 55}},
	"chromeos15-row3-rack13-host1-attenuator": {
		0: {2437: 59, 5220: 59, 5765: 59},
		1: {2437: 52, 5220: 54, 5765: 54},
		2: {2437: 59, 5220: 59, 5765: 59},
		3: {2437: 52, 5220: 54, 5765: 54}},
	"chromeos15-row3-rack13-host2-attenuator": {
		0: {2437: 64, 5220: 62, 5765: 62},
		1: {2437: 58, 5220: 57, 5765: 57},
		2: {2437: 64, 5220: 62, 5765: 62},
		3: {2437: 58, 5220: 57, 5765: 57}},
	"chromeos15-row3-rack13-host3-attenuator": {
		0: {2437: 60, 5220: 58, 5765: 58},
		1: {2437: 52, 5220: 57, 5765: 57},
		2: {2437: 60, 5220: 58, 5765: 58},
		3: {2437: 52, 5220: 57, 5765: 57}},
	"chromeos15-row3-rack13-host4-attenuator": {
		0: {2437: 52, 5220: 58, 5765: 58},
		1: {2437: 59, 5220: 60, 5765: 60},
		2: {2437: 52, 5220: 58, 5765: 58},
		3: {2437: 59, 5220: 60, 5765: 60}},
	"chromeos15-row3-rack13-host5-attenuator": {
		0: {2437: 58, 5220: 60, 5765: 60},
		1: {2437: 53, 5220: 58, 5765: 58},
		2: {2437: 58, 5220: 60, 5765: 60},
		3: {2437: 53, 5220: 58, 5765: 58}},
	"chromeos15-row3-rack13-host6-attenuator": {
		0: {2437: 52, 5220: 56, 5765: 58},
		1: {2437: 53, 5220: 56, 5765: 57},
		2: {2437: 52, 5220: 56, 5765: 58},
		3: {2437: 53, 5220: 56, 5765: 57}},
	"chromeos15-row3-rack14-host1-attenuator": {
		0: {2437: 53, 5220: 56, 5765: 56},
		1: {2437: 52, 5220: 56, 5765: 56},
		2: {2437: 53, 5220: 56, 5765: 56},
		3: {2437: 52, 5220: 56, 5765: 56}},
	"chromeos15-row3-rack14-host2-attenuator": {
		0: {2437: 59, 5220: 59, 5765: 59},
		1: {2437: 59, 5220: 60, 5765: 60},
		2: {2437: 59, 5220: 59, 5765: 59},
		3: {2437: 59, 5220: 60, 5765: 60}},
	"chromeos15-row3-rack14-host3-attenuator": {
		0: {2437: 52, 5220: 56, 5765: 56},
		1: {2437: 64, 5220: 63, 5765: 63},
		2: {2437: 52, 5220: 56, 5765: 56},
		3: {2437: 64, 5220: 63, 5765: 63}},
	"chromeos15-row3-rack14-host4-attenuator": {
		0: {2437: 52, 5220: 55, 5765: 55},
		1: {2437: 58, 5220: 58, 5765: 58},
		2: {2437: 52, 5220: 55, 5765: 55},
		3: {2437: 58, 5220: 58, 5765: 58}},
	"chromeos15-row3-rack14-host5-attenuator": {
		0: {2437: 57, 5220: 58, 5765: 58},
		1: {2437: 52, 5220: 55, 5765: 55},
		2: {2437: 57, 5220: 58, 5765: 58},
		3: {2437: 52, 5220: 55, 5765: 55}},
	"chromeos15-row3-rack14-host6-attenuator": {
		0: {2437: 57, 5220: 57, 5765: 57},
		1: {2437: 52, 5220: 55, 5765: 55},
		2: {2437: 57, 5220: 57, 5765: 57},
		3: {2437: 52, 5220: 55, 5765: 55}},
}

HostFixedAttenuations is used for mapping fixed line attenuation for a given frequency for each atenuator available in the lab.

Functions ¶

This section is empty.

Types ¶

type Attenuator ¶

type Attenuator struct {
	// contains filtered or unexported fields
}

Attenuator stores properties of a programmable attenuator.

func (*Attenuator) Attenuation ¶

func (a *Attenuator) Attenuation(ctx context.Context, channel int) (float64, error)

Attenuation returns attenuation of the particular attenuator channel.

func (*Attenuator) Close ¶

func (a *Attenuator) Close()

Close is used for cleaning up resources.

func (*Attenuator) MaximumAttenuation ¶

func (a *Attenuator) MaximumAttenuation() float64

MaximumAttenuation gets attenuator's maximum attenuation value.

func (*Attenuator) MinTotalAttenuation ¶

func (a *Attenuator) MinTotalAttenuation(channel int) (float64, error)

MinTotalAttenuation returns the minimal attenuation the attenuator can be set for the given channel.

This is obtained by finding the maximum fixed loss of all frequencies the channel has.

func (*Attenuator) SetAttenuation ¶

func (a *Attenuator) SetAttenuation(ctx context.Context, channel int, val float64) error

SetAttenuation sets attenuation on particular channel.

func (*Attenuator) SetTotalAttenuation ¶

func (a *Attenuator) SetTotalAttenuation(ctx context.Context, channel int, attenDb float64, frequencyMhz int) error

SetTotalAttenuation sets attenuation level for the specified frequency on the given channel.

Each channel of the attenuator has different fixed attenuation/loss for different frequency. This function finds out the fixed attenuation of the given frequency and channel and adds a variable attenuation on it.

Source Files ¶

View all Source files

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