4
1
Forward Gain Adjust
For RF forward path gain adjustment
2
Tilt Adjust
For forward path lope adjustment over the entire bandwidth
3
Input
Input RF signal
4
Output
Amplified RF signal available for output
5
Reverse Gain Adjust
For RF reverse path gain adjustment
6
DC Power Jack
Plug from wall power adaptor supplies 24VDC
4. HARDWARE CONNECTIONS
a. Mount the CTA-30-870AR securely onto a wall or equipment rack using screws or
bolts through the mounting tabs.
b. Connect a 75ohm coaxial cable with F-connectors from the RF source output to
CTA-30-870AR’s Input port.
c. Connect a 75ohm coaxial cable with F-connectors from the CTA-30-870AR’s Output
port to the RF distribution network.
d. Plug in the power adaptor to the appropriate AC wall outlet. Connect the power
adaptor to the CTA-30-870AR’s DC power jack. Be certain that power source is
capable of handling the load if the CTA-30-870AR and other equipment are being
powered by it.
5. ADJUSTMENT
The chart below shows the proper operation levels for the CTA-30-870AR. Note the listed
performance criteria are for specific numbers of channels, and must be de-rated accordingly
when inserting additional channels. However, the amplifier’s gain does not change.
Therefore, as the number of channels increases from seven (7) channels, the input level and
the output level must be reduced. Exceeding the input levels listed below will product
intermodulation and picture distortion.
Number
Of Channels
Maximum
Level Input (dB)
Maximum
Level Output (dBmV)
7
36
65
12
33
57
36
25
50
54
16
46
77
13
44
135
10
41
Turn the CTA-30-870AR’s Gain Adjust control to achieve the input and output levels identified
above. Additional attenuators may be needed to further reduce the input level.
The CTA-30-870AR’s Tilt Adjust control should be used to set the appropriate slope per
system specifications. Note that the Tilt Adjust allows the adjustment of the gain-to-frequency
characteristic of the amplifier.
