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Reference
GB1400 User Manual 3-45
CLEAR Control
Pressing the CLEAR key will reset all active history indicators. Note that when
you start a test, you must clear test results and history indicators by pressing the
ERROR DETECTION CLEAR and ERROR HISTORY CLEAR keys
respectively.
Audio (Beeper) Function
The Analyzer may be set up to "beep" each time a second is detected in which
BER is above a specified threshold. The AUDIO VOL and RATE controls are
used to configure this function.
Procedure To Set Up the Audio Alert Function
1. Press the AUDIO RATE up or down keys to increment or decrement the
current audio alert BER threshold. The current value of the AUDIO
RATE will be displayed in the bottom, right field of the display for about
seven seconds after the last key press. Available selections are 1E-x,
where x = 2, 3, ... 16
2. Press the AUDIO VOL up or down keys to increment or decrement the
current audio alert volume. There are four volume levels. The minimum
value is "OFF". Except when volume is set to the minimum level, a beep
will occur each time you press an AUDIO VOL up or down key to
indicate the current volume.
Analyzer Error Messages
When abnormal input conditions are detected, the Analyzer will display various
error messages to indicate an unusual condition. These are explained below.
NO CLOCK: This message will appear in the frequency field (top, left)
if no activity is detected at the CLOCK input for 20 ms.
NO DATA: This message will appear in the BER field (top, middle) if
no activity is detected at the data (or clock) input for 20 ms.
LOW AMP: May appear when no signal or a low-signal is applied to the
CLOCK or DATA input and AUTO_SEARCH is enabled