Monitoring the SDI Physical Layer
12. Select Equaliz
er Bypass.
13. Select one of the following settings:
On. Bypass the equalizer when the instrument is connected to a signal
with a short length of cable. This setting minimizes the jitter contributed
by the internal equalizer and is generally used only with signals containing
very low jitter.
NOTE. This setting is not saved in a preset.
Off. Enables the equalizer, which enables operation with typical cable
lengths and reduces jitter due to cable effects. Use this setting for most
si
gnals.
To Set SMPTE 259/292/425 Alarm Thresholds
1. To reset the SMPTE 259 (SD), SMPTE 292 (HD), and SMPTE 425 (3G)
alarm thresholds back to the factory-default values, select Reset Defaults
from the CONFIG > Physical Layer Settings menu and press SEL.
2. To reset o nly the SD thresholds, HD thresholds, or the 3G thresholds back to
the factory-default values, select SMPTE 259 (SD) Thresholds or SMPTE
292 (HD) Thresholds or SMPTE 425 (3G) Thresholds, depending on which
type of video signal you are monitoring.
3. Select Reset Defaults in the SMPTE submenu and press the SEL button.
4. To set custom threshold levels, select SMPTE 259 (SD) Thresholds, SMPTE
292 (HD) Thresholds,orSMPTE 4 25 (3G) Thresholds depending on which
type of video signal you are monitoring.
5. Select Jitter1 Level.UsetheGeneral knob to increase or decrease the
threshold level for the Jitter1 engine controlling the top two tiles of the
instrument display. The maximum level you can enter is 4.00 UI; the
minimum level is 0.10 UI.
6. Select Jitter2 Level.UsetheGeneral knob to increase or decrease the
threshold level for the Jitter2 engine controlling the bottom two tiles of the
instrument display.
7. Select Cable Loss to specify the threshold for signal loss (in dB) due to length
of cable connecting the signal source to the instrument.
8. Use the General knob to increase or decrease the threshold level. The
maximum level you can enter is 3 0.0 dB; the m inimum level is 0.0 dB.
9. Select Cable Length to specify the threshold for the length of the cable (in
meters) connecting the signal source to the instrument.
WFM8200 and WFM8300 Waveform Monitors 103
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