Comtech-ef-data CiLink Manual do Utilizador descarregar pdf (Página 29)

CSAT-5060/XSAT-7080 Transceiver iPAQ Link Revision 2

Operations MN/CiLink.IOM

3–7

3.3.2.3 Main Menu Æ Configuration Æ LNA (Low Noise Amplifier)

The currently selected transceiver is the unit that will be polled for status

information in the LNA configuration XCVR# selection box:

XCVR1 is the default selection and XCVR2 is not selectable if CiLink is set to operate under standalone

(non-redundant) system parameters (see

Configuration Æ System Type for detailed information).

The status-only ONLINE/OFFLINE field located to the right of the

XCVR# selection box indicates the active line status of the

currently selected transceiver.

• Current Source [Enable/Disable]▼ – The transceiver has

the circuitry to source up to 400 mA of current at 12 VDC

to power an LNA.

• Fault Logic [On/Off] Current Window [Enable/Disable]▼, Allowable Change – When

the transceiver has been configured to supply current to the LNA (refer to

Current

Source

on this page) adjustable LNA current monitoring is available.

Setting the

Fault Logic to On or Off allows the user to control whether or not the

redundancy controller switches on an LNA current alarm in the redundant configuration.

The transceiver allows the user to select whether or not the summary fault relay is activated

if the LNA current moves out of a prescribed window.

The alarm is configured by attaching the LNA, turning on the current source,

enabling the

Current Window, then setting the Fault Logic to On. Then, the Allowable Change

feature permits the user to ‘calibrate’ the current and define an operational range window,

specifying a current usage percentage value of anywhere from ± 20% to ± 50% to trigger

an alarm.

The user can disable this ‘window detect’ feature by setting the window value to ± 99%.

Tap

[Set Data] to save the updated configuration selections. Otherwise, tap [ok] to return to the

Main Menu from the Configuration Æ LNA screen without saving any changes.

IMPORTANT

Care should be taken when directly

connecting the transceiver to lab test

equipment – a DC block should be used

between the "RF IN" port and the RF test

source to protect the test equipment in

case the source is accidentally turned on.

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