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6.6 Fault Symptoms
Symptom
Suggested Action
No RF Link
Check a suitable transmitter RF source is active, on correct frequency.
Ensure Downconverters are connected. Ensure antennas are
connected to downconverters. Ensure there is no interfering signal.
Poor link
performance
Poor performance of the link can occur for the following reasons.
•
Interference. Should an interfering RF signal occur on the
same frequency the performance of the link will be affected.
Remove the interferer e or move to an alternative
frequency.
•
Unsuitable antennas, or out of band antennas. See the
antenna sections for guidance on antenna selection and
use.
•
Reduced transmit power, ensure that the attenuation
setting on the transmitter is appropriate for direct output, or
for amplifiers connected.
•
Receive antenna positioning, were possible mount the
receive antennas away from other objects, unobstructed
and as high as possible. Poor alignment of directional
antennas.
•
No Diversity operation. Ensure both down converters are
operational.
Blue screen
at receiver
Receiver RF LED not lit - see “No RF Link” section
Receiver RF LED lit. Check video is enabled at the transmitter. Check
correct unit name is selected at the receiver to match the transmitter.
Check scrambling keys are matched.
Reduced
Image
quality
Image quality is affected by the selected horizontal resolution. The
image will become progressively softer for each horizontal resolution
below the sharpest resolution of 704 pixels. It is advisable to select a
horizontal resolution that matches the resolution of the camera.
Image quality is also affected by the video bit rate which can be read
from the video bit rate field of the SOLO transmitter controller). The
standard setting is 2.3Mb/s. However enabling audio, particularly the
high quality audio modes, will reduce the video bit rate substantially.
Therefore ensure an appropriate audio mode is selected or audio is
fully disabled if not required.
No audio
Ensure audio is enabled at the transmitter (disabled by default).
Rolling
black and
white
distorted
video
Check that the “Output video standard” setting in Engineering options
->Advanced options->Global is set to the correct video standard. Also
check the “Power-up line standard” option in each receiver’s advanced
tab. The CRX system supports PAL and NTSC but the two cannot be
mixed, so all transmissions into the unit must be the same standard to
correctly display the video.
