Specifications

7-35

Softkey Menu Descriptions

Gating Menu

Path

or ,

Description

The softkey gives access to a menu of softkeys which control the error detector

measurement (gating) period. The three gating modes (MANUAL, SINGLE and

REPEAT) are a one-of-three selection.

Gating after a Power Loss

After a power loss the error detector will attempt to regain sync for approximately

25 seconds.

• If sync is regained within 25 seconds gating will restart immediately.

• If after 25 seconds has elapsed sync has not been regained, gating is forced to start.

The Power Loss Seconds result displayed is the overall time that gating was lost, and thus

the time that the system was unable to make a measurement.

NOTE Neither the gating mode, nor the gating period may be changed while

gating is active.

The softkeys are as follows:

Starts the error detector gating, or stops the current gating action

and begins a new gating period.

Stops the current gating action.

The next three keys are mutually exclusive:

Configures the error detector to make measurements over a

gating period controlled by the user.

Configures the error detector to make measurements over one

gating period and then stop.

Configures the error detector to make repetitive measurements

whereby one gating period follows another immediately. There

is no deadtime between the end of one period and the start of the

next.

gating

RUN GATING

STOP GATING

MANUAL

SINGLE

REPEAT