Service manual

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
ATTENUATOR
INPUT
20dB 10dB 10dB
6dB 3dB
OUTPUT
J1 J2
J3 J4 J5 J6 J7 J8
J9
J10
ATTENUATOR
INPUT
20dB 10dB 10dB
6dB 3dB
OUTPUT
J1 J2 J3 J4 J5 J6 J7 J8
J9
J10
ATTENUATOR
INPUT
20dB 10dB 10dB
6dB 3dB
OUTPUT
J1
J2 J3 J4 J5 J6 J7 J8
J9
J10
36 dB ATTENUATION
23 dB ATTENUATION
19 dB ATTENUATION
A010 IN SPLITTER SHELF