Option Installation
TVM450/S/TVM550/S/TVM550II/TVM550IIS
Owner’s Manual
Page 5-15
Table 5-2. RF Combiner PC Board R302 Resistance
R302
Resistance
Attenuation
CALT45 Test
Point TP02
CALT45 Test
Point TP03
200 ohms
–15 dB
OFF (open, remove solder)
OFF (open, remove solder)
120 ohms
–12 dB
ON (closed, do not remove
solder)
OFF (open, remove solder)
100 ohms
–11 dB
ON (closed, do not remove
solder)
ON (closed, do not remove
solder)
NOTE
These test points act as jumpers. To “open” the connection, remove the pre-
existing solder from the test point. To “close” the connection, do not remove the
solder.
6. Assemble the REMOTE IF SELECT parts into the unit rear panel as shown
in Figure 5-14 (see Figures 5-12 and 5-15 for placement).
7. Install the supplied F-to-RCA connector in the TVM rear panel (ALTERNATE
IF COMP IN). See Figures 5-12 and 5-15 for placement. (Here is where a
hole may have to be drilled on an early TVM450.)
a. Remove the paper cover from the REMOTE IF SELECT hole in the rear
panel.
b. Insert the F-to-RCA connector into the hole, with the F connector on the
outside of the rear panel and the RCA connector on the inside of the
rear panel (see Figure 5-15).
c. Using the two provided nuts, tighten the connector securely. Make sure
to install the solder-lug ground connector between them as shown.
8. In the CALT45 kit, locate the 3-pin connector with blue, red, and brown
wires.
a. See Figure 5-12, and solder the blue wire to location U10 on the P800
power supply PC board.
b. Solder the red wire to location U8 on board P800.
c. Solder the brown wire to location U9 on board P800.
d. Insert the 3-pin connector into socket JN04 on the CALT45 board.
