Specifications

4-22

Operating Features and Specifications

Measurement Period

The measurement period is configured from the menu accessed via

Measurement Period Features

• Length: The length of the measurement period can be set as a time period, number of

bits or number of errors.

• Timed Measurement Period: Can be set from 1 second to 99 days, 23 hours,

59 minutes 59 seconds in 1 second steps.

• Number of Bits: The time for the number of bits to be received to a resolution of

1second.Canbesetfor10nbits,n=7to15.

• Number of Errors: Time for number of errors to be detected to a resolution of

1 second. Can be set for 10, 100 or 1000 errors.

• Real-time Clock: Provides time and date information for event logging. Battery back-

up allows clock to continue running when the instrument is switched off or power fails.

• Elapsed Time Indication: Shows elapsed time from the start of a gating period; resets

to zero at the start of each gating period; holds value when measurement stopped.

Gating modes

There are three gating (measurement timing) modes: Manual, Timed Single and Timed

Repeat.

Manual: Gating period is controlled by the and

keys. Accumulating results are displayed throughout the measurement and the end of

measurement results are held until a new gating period is started.

Single: Gating period is started by pressing the key and terminates at

the end of the gating period set by the user. Accumulating results are displayed

throughout the gating period and the end of gating results are held until a new gating

period is started.

Repeat: Similar to Single but when one timed gating period ends, a new identical

period starts. This continues until the measurement is terminated by pressing the

key. The measurement results displayed during any period can be

the final results of the previous period or the accumulating results for the current

period. There is no “deadtime” between consecutive periods. The gating period

excludes any periods when the instrument is not powered.

gating

RUN GATING STOP GATING

RUN GATING

STOP GATING