User Manual

ADCP-75-192 • Issue D • October 2005 • Section 2: Description
Page 2-23
 2005, ADC Telecommunications, Inc.
4.5 Hub Reference Module, HRM
The Hub Reference Module (HRM) provides GPS timing and clocking data that gets
distributed throughout a Digivance CXD Hub.
(8) RS-232
CONNECTOR
(1) GP S IN
(7) 1 HZ LED
(2) GP S AUXILLARY
(5) P OWER LED
(3) CLOCK TEST
POINTS
(4) FAULT LED
(6) P P L LOCK LED
Figure 2-16. Hub Reference Module Front Panel
Table 2-15. HRM Front Panel User Interface
REF
No.
USER INTERFACE
DESIGNATION DEVICE FUNCTIONAL DESCRIPTION
1 GPS Input Connector SMA connector Input of GPS antenna signal
2 GPS Auxiliary SMA connector Auxiliary GPS input
3 Clock Test Points SMA connectors
4 Fault LED Single-colored LED
(Red)
Status indicator turns red when module has
failed.
5 Power LED Single-colored LED
(Green)
Status indicator turns green when module
has power.
6 PLL Lock Single-colored LED
(Yellow)
Status indicator when phase lock loop
circuit is locked
7 1 Hz LED Single-colored LED
(Yellow)
Status indicator when 1 Hz signal detected
8 GPS RS-232 DB9 connector Output of GPS signal to STF2 module
• GPS
RS-232 DB 9 connector brings GPS to the STF2 module
GPS SMA is the input from the Hub GPS antenna
AUX SMA brings the GPS to the HRM in the next Hub rack
• 1 HZ LED