ZTE Corporation R8978S2600L Manuale Utente
ZXSDR R8978 User Manual
Figure 3-14 Connection of the CAL Interface Cable
3.4.7 EAM/RGPS Interface Cable
Function
The dry contact (
EAM
) interface is located at the external filter at the bottom of the ZXSDR
R8978. It uses an eight-core round connector. It supports the
RGPS
functions and one
dry contract input to transparently transmit the external device status.
The
RGPS
receiver is located at the
GPS
receiving antenna. Installed near the antenna,
the satellite card transmits the output digital signal to the clock main control card through
a differential line.
Because digital signal transmission is not affected by RF signal
attenuation, the remote distance is long and good reliability and maintainability is ensured.
Connection
End A is connected to the EAM interface of the ZXSDR R8978. End B is connected to the
dry contact output/
RGPS
interface of the external device.
3.5 External Cable Connection
illustrates the external cable connection.
3-14
SJ-20141113151137-001|2016-08-17 (R1.2)
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