Cisco RF Gateway 10 Quick Start Manual page 23

Figure 16 Nominal Attenuation Graph for 75-Ohm Miniature Headend Coaxial Cable
0
-2
-4
-6
-8
-10
-12
0 100 200
Installing the UCH on the Cisco RFGW-10 UEQAM RF Switch Card
The UCH must be used for all cable connections to the RF switch line card. Failure to use the UCH may cause
Caution
permanent damage to the line card connectors, resulting in low or no RF output in the downstream and low or no
RF input in the upstream.
To install the UCH, complete the following steps:
Position the UCH red line to the red line on the RF switch card (left side see Figure 17).
Step 1
Align the end pins on the UCH with the pin holes in the faceplate.
Step 2
While replacing the UCH, be careful not to bend the cables in the holder at right angles.
Caution
Step 3 While holding the UCH and the cables in place on the faceplate, use your fingers to tighten the lead screw. If the UCH
and cables do not set securely in place on the faceplate, wiggle the holder to set the connectors.
Use the flathead screwdriver to tighten the lead screw. Turn the lead screw clockwise until it no longer turns (10 in-lbs,
Step 4
maximum torque 15 in-lbs).
Torquing the lead screw to more than the maximum of 20 in-lbs can cause the lead screw to fail.
Caution
For the UCH2, as you turn the lead screw clockwise, the outer shroud on the UCH moves to cover the red line on the
Note
top and the black line on the bottom of the UCH. The half circles on the edge of the shroud close as the shroud fits
down over the UCH. Full engagement is indicated by visible metal-to-metal contact between the UCH and the faceplate
(check the half circle cutouts).
NOM ATTENUATION GRAPH
300 400 500
FREQ (MHz)
NOM ATTEN (dB/10-0-ft)
600 700 800 900 1000
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