Tektronix WFM8200 User Manual page 131

To Enable Alarms
To Set Limits or
Qualifications
WFM8200 and WFM8300 Waveform Monitors
The channels for which you enable alarms trigger your previously defined alarm
responses. (See page 114, To Set Allowed Alarm Responses.)
1. From the CONFIG menu, select Enable Alarms and toggle it to On. This
turns on all alarms that are individually enabled and provides a quick way to
switch them on and off without changing their individual settings.
2. Also, for Audio inputs, you must enable alarms individually by channels. To
start, select Audio Inputs/Outputs in the CONFIG menu.
3. Select each input shown in the box to individually enable its alarms. AES
A is shown selected.
4. For each of the AES, Analog, and Embedded inputs, select Bar to Input Map
and press the SEL button to display the Bar to Input map menu.
5. Navigate to each box for each alarm that you want to allow. Press the SEL
button to enable it (when enabled, there is an X in the box) or disable it (when
disabled, the box is blank) for each channel displayed.
6. Select the Return box, and press the SEL button to return to the CONFIG
menu.
7. For Dolby 1 - 4, you must also enable alarms individually. (Requires Option
DPE.)
8. Select the Dolby Fmt Expected, Dolby E Pgm Mask and/or Dolby Chan
and configure them as you want.
Some alarms require setting a threshold or condition that triggers the alarm.
1. Select Alarm Thresholds in turn, for both the Analog Audio Displays and
Digital Audio Displays.
2. For each selection in the previous step, set the following alarm thresholds
that trigger an alarm when exceeded:
Clip Samples: number of consecutive samples at the all-high level.
Mute Samples: number of consecutive all-zero samples.
Silence Level: the level below which audio is considered not present.
Silence Duration: the length of audio silence time allowed.
Over Level: the too-loud audio level.
3. For Closed Caption related alarms, select Aux Data Settings and then the
desired CC type.
Monitoring the SDI Physical Layer
115