Anritsu MP8931A - Page 31

2.3 Part Names
2-9
Table 2.3.1-1 Front panel components (Cont’d)
No. Label Name Description
[22] Errors,
Sync Loss,
Signal Loss,
Counting
Status display
lamps
LEDs for status indication. Come on immediately
after the power switch is turned ON and go off when
the MP8931A is activated.

Errors (red): Indicates that an error occurred.
Lights up for approx. 50 ms per error.

Sync Loss (red): Comes on when synchronization
is lost.

Signal Loss (red): Comes on when Clock or
measurement data is not input for a certain
period of time.
(Refer to Table 2.3.1-2.)

Counting (green): Blinks in approx. 500-ms
interval during measurement.
LEDs, except Counting, maintain the status
immediately before the measurement is stopped.
[23] Display Displays measurement items, setting items and
measured results. (Number of display characters:
20

2)
[24] Remote lamp Comes on when the MP8931A is in remote control
status.
Table 2.3.1-2 Signal Loss LED operating conditions
Setting Interface Signal Loss turns on: Signal Loss does not turn on:
Burst function
is disabled
NRZ When the Clock is not input for 50
ms or more.
When the Clock is not input for
less than or equal to 1 ms.
DVB-SPI When PSYNC is not detected, or
when the Clock is not input for 50
ms or more after PSYNC is
detected.
When the Clock is not input for
less than or equal to 1 ms after
PSYNC is detected.
DVB-ASI When Frame synchronization is
not established, or when
measurement data is not detected
for 50 ms or more after frame
synchronization is established.
When Frame synchronization is
established and measurement
data is not detected for less than
or equal to 1 ms.
Burst function
is enabled
NRZ When the Clock is not input for
600 ms or more.
When the Clock is not input for
less than or equal to 50 ms.
DVB-SPI When PSYNC is not detected, or
when the Clock is not input for
600 ms or more after PSYNC is
detected.
When the Clock is not input for
less than or equal to 50 ms after
PSYNC is detected.
DVB-ASI When Frame synchronization is
not established, or when
measurement data is not detected
for 600 ms or more after frame
synchronization is established.
When Frame synchronization is
established and measurement
data is not detected for less than
or equal to 50 ms.