ATX Q-Series Power BAQ-UP Руководство по установке и эксплуатации - Страница 8
Просмотреть онлайн или скачать pdf Руководство по установке и эксплуатации для Переключатель ATX Q-Series Power BAQ-UP. ATX Q-Series Power BAQ-UP 14 страниц. (qred) redundancy switch with backup amplifier
Печатать страницуCHAPTER 2: DESCRIPTION OF OPERATION
2.1
Functional Schematic
SECONDARY (BACKUP) RECEIVER
OUT
TO
PRIMARY
NC
C
INPUT
NO
NO
NC
C
OUT
TO
SECONDARY
JUMPER
This wiring configuration is for a hub site with a primary
input and a backup input. In addition to the wiring
method, the microprocessor is programmed at ATX to
switch to the secondary input when the primary input falls
below the threshhold level. When the primary level is
restored within normal range, the QRED will switch back
to the primary input immediately. This is an advantage in
unmanned hub sites in that no level resetting is required
after a primary path failure.
2-2
PRIMARY (MAIN) RECEIVER
IN
FROM
PRIMARY
DETECTOR
NC
OUTPUT
C
SIGNAL OUT
NO
DETECTOR
NO
NC
C
IN
FROM
SECONDARY
Q-Series
Power – BAQ-UP™ (QRED) Redundancy Switch with Backup Amplifier – Installation & Operation Manual
®
PRIMARY (MAIN) AMP
SIGNAL IN
OUT
TO
PRIMARY
NC
C
INPUT
NO
NO
NC
C
OUT
TO
SECONDARY
SECONDARY (BACKUP) AMP
This wiring configuration is for a headend site with an amplifier that needs
backup protection. This typically is used in the signal path where an amplifier
failure is not acceptable. The QRED switch is programmed to switch to the
secondary amplifier when the cumulative RF output of the primary amplifier falls
below a programmed level, usually a 3 dB drop. This output is measured within
a frequency range from 120-220 MHz. The microprocessor controlled switch
can be programmed to switch within the end users specifications for timing and
RF levels. Once a switch is made to the secondary amplifier, the signal path
continues through the secondary amplifier until a technician restores the
primary amplifier signal levels and resets the switch manually.
IN
FROM
PRIMARY
DETECTOR
NC
OUTPUT
C
SIGNAL OUT
NO
DETECTOR
NO
NC
C
IN
FROM
SECONDARY