HD3G7 HD 3 Gb/s SDI Video Generator
PLL STATUS.
This diagnostic displays the following:
Jit — Indicates the condition of the jitter attenuator used to clean up the
clock recovered from the input signal. The condition can be reported as
Lock
(locked) or
Unlk
(unlocked). This diagnostic readout is only valid
and signi
fi
cant when in converter mode. If in converter mode it should read
"locked" If not then there may be a problem with the input signal or the
module.
Flex0 — This circuit is not used, so the readout may show locked or unlocked.
The state has no bearing on instrument operation.
Flex1 — Indicates the state of the
fl
exible clock generator. This readout
should show
Lock
(locked) and is only valid and signi
fi
cant when the
instrument is in generator mode. An
Unlk
(unlocked) reading might indicate
a problem with the module or mainframe.
DDS STATUS.
This diagnostic displays the following:
DDS0 Phase — This circuit is not used, so the readout may show locked or
unlocked. The state has no bearing on instrument operation.
DDS1 Phase — Indicates that the
fl
ex clock circuit is correctly aligned with
the internal frame pulse. This readout should show
Lock
(locked) and is only
valid and signi
fi
cant when the instrument is in generator mode. An
Unlk
(unlocked) reading might indicate a problem with the module or mainframe.
If the instrument is in converter mode, this readout is not active and may
show locked or unlocked.
CRC ERRORS.
This diagnostic shows how many CRC errors are detected from
the input signal. If the output signal of the conversion process is not what you
expect, or the jitter attenuator is having trouble locking, then you should check
this readout for errors on the input.
It is normal to see errors when you are connecting or disconnecting the input, or
when no input is present. When this occurs, clear the errors after the connections
are made by using the
Diagnostics
>
Clear CRC Errors
submenu. After clearing
the errors, monitor this readout if you have concerns about the input signal.
This diagnostic displays the following:
Y — The number of errors detected on the Y portion of the active picture
area of the input signal.
YANC — The number of errors detected on the Y portion of the ancillary
data space in the input signal.
C — The number of errors detected on the C portion of the active picture
area of the input signal.
CANC — The number of errors detected on the C portion of the ancillary
data space in the input signal.
TG700 TV Signal Generator Platform User Manual
3–185
Содержание TG700
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Страница 27: ...Getting Started...
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Страница 34: ...Getting Started Figure 1 1 Installing the rackmount hardware 1 6 TG700 TV Signal Generator Platform User Manual...
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