Viking VX 900 MHz LTR, User Manual

Page: 35 / 234

INSTALLATION
2-9
October 1999
Part No. 001-2009-201
2. If connection to additional 2009 series repeaters is
necessary, additional 8-Way Splitter Shelves, Part
No. 023-2000-924, are added as required.
All additional shelves are connected to the 1.25
MHz Output ports of the 2000 OCXO drawer.
The level at the splitter shelf output ports is approx-
imately -10 dBm. See Figure 2-10.
3. Connection to 8900 Series repeaters is made by
installing an Attenuator Kit, Part No. 023-2000-923,
in the 8-Way Splitter Shelf.
This attenuator assembly should be adjusted to pro-
vide 1 to 1.2V P-P of reference signal at U205, pin
7 of all 8900 Receivers and Exciters in the existing
daisy chain connected to the Attenuator Out port.
Refer to Figure 2-9 for examples of attenuator set-
tings.
Figure 2-9 ATTENUATOR SETTINGS
A
TTEN
U
A
T
OR
IN
P
U
T
20
dB
10
dB
10
dB
6dB 3dB
OU
T
P
UT
J1 J2 J3 J4 J5 J6 J7 J8
J9
J1
0
A
TTEN
U
A
T
OR
IN
P
U
T
20
dB
10
dB
10
dB
6dB 3dB
OU
TP
UT
J1 J2 J3 J4 J5 J6 J7 J8
J9
J1
0
A
TTEN
U
A
T
OR
INP
U
T
20d
B
10d
B
10d
B
6d
B
3d
B
OU
TP
UT
J1 J2 J3 J4 J5 J6 J7 J8
J9
J1
0
36 dB ATTENUATION
23 dB ATTENUATION
19 dB ATTENUATION
A010 IN SPLITTER SHELF