ADC and 3 Doubler - Manual (Page 28)

Loopback Operation in HiGain Systems LTPH-UM-1234-01
22 April 30, 2003 HDU-409 Lists 1, 2, and 3
L
OOPBACK
O
PERATION IN
H
I
G
AIN
S
YSTEMS
When equipped with the HDU-409 a HiGain system can execute the types of
loopbacks listed in
Table 7 .
The loopbacks can be initiated from any of the following:
• The HLU craft port
• The HLU front-panel buttons
• A family of Special Loopback (SPLB) in-band commands initiated at the
T1 input port at either the HLU or HRU
• The HRU craft port, if remote provisioning is enabled from the HLU
Doubler loopbacks work only with HiGain systems. PG-Flex
does not support doubler loopbacks.