PVI VeCOAX MicroMod-2, Reference Manual

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26
Set the Coax Fre
quencie
s
Set the first RF1 Frequency then click apply, so the following frequencies will be set automatically,
spanned of 6 mhz eachother as per the US Cable television standard.
In this example we set 195 mhz ( channel 10 over coax ) then we click apply so the RF2 takes automatically the
value 201 Mhz ( channel 11 over coax ) the RF3 207 Mhz ( channel 12 over coax ) the RF4 213 Mhz (channel 13
over coax )
It is possible to set the channels leaving interspace channels within a maximum window of 50 mhz between
the RF1 and the RF4
IMPORTANT : if you are operating multiple modulators on the same coax, make sure to use different sets
of frequencies per each modulator, choosing the adjacent frequencies from the table at the end of this
manual.
You will also need to make different vct Numbers so the channel lineup on the television will not collide
RF OUT LEVEL = Set the RF SIGNAL Level out, in dBm ( not db millivolts ! ), from -10 ( high Level ) to -30 ( low )
-10 dBm is the maximum level and equals to +45 dB Millivolts
-10 dBm ( +45 db millivolts ) might be too high in case you drive a distribution amplifier, causing signal distortion
which prevents any TV to receive. If so, just decrease in steps of -1 at time until the signal is properly viewed on
all TVs through your amplifier. If the modulator is driving your coax network directly through a passive coax splitter,
just leave this parameter to the max level -10 dBm
–
default = -10dBm
RF ON = when selected it turns on the related frequency out.
In this example, RF1 is used by the HDMI1 Input encoder, RF2 is used by the second HDMI Input encoder, RF3
is not used / turned off, and RF4 is not used / turned off.
Click apply to set the current parameters
Test with a local TV First, directly connected with a short piece of coax, then use the same television as tester
to check the signal in any room after you inject the modulator output to the main distribution.
If the signal is not received, the frequencies used in this example might be already taken by other tv services,
So this requires to change it to a higher unused set of frequencies, as example frequency RF1 = 843 Mhz
( then apply to set the following automatically. Should you need to change the frequencies, there is no need to
change any other parameters, as the coax frequencies are just the “carriers to send the data to the tvs”,
then the tv will execute the major / minor channel numbers to store it (not the frequencies)
For more J83B US CABLE TV Frequencies see the QAM FREQUENCIES/CHANNELS Chart at the end of this
manual