MODEL 2282-122-21 Redundant Amplifier
1.0 General
1.1 Equipment Description
The Model 2282-122-21 Redundant Amplifier, 0.95-2.15 GHz, +33 OIP3, monitors and controls internal
amplifiers configured in a 1:1 or 1:2 redundant configuration. Variable attenuators can adjust the gain of each
amplifier by 30 dB in 0.5± 0.5 dB steps by the front panel controls and the M&C. Front panel LEDs indicate
power, status (online, standby, alarm), and mode (auto, manual, remote). The amplifiers’ current is measured
and a fault is signaled if the current deviates from user selected thresholds. Multi-function switches select Auto,
Manual or Remote operation, priorities for 1:2, and the signal path in the Manual mode. Remote operation via
the RS232/RS485 M&C interface allows selection of priorities (1:2) and the signal path. Ethernet is available as
an option. An LCD display shows each amplifier’s current, and Attenuation settings. Connectors are type N,
female for the RF in and out signals, DB9 for monitor and control. The 2282-122-21 is housed in a 1RU chassis
and is powered by redundant power supplies fed by separate, fused 100-240 ±10% VAC AC input connectors.
MENU
EXECUTE
MODEL 2282
C
ROSS
T
ECHNOLOGIES INC.
REDUNDANT AMPLIFIER
AMP
0.300
0.290
0.310
1
POWER
STATUS
CH1
MODE
BU
ALARM
STDBY
ONLINE
MANUAL
REMOTE
AUTO
CH2
ALARM
PS1
PS2
2
BU
ATTEN
10.0
02.0
08.0
FRONT PANEL
PS-1
GND
AMP2 IN
PS-2
J3
6
7
8
9
J2
AMP2 OUT
J4
AMP1 OUT
J7
AMP 1 IN
J8
OFFLINE
AMP OUT
OFFLINE
AMP IN
J5
J6
M&C
J1
REAR PANEL - Shown with optional Ethernet Connector (J1)
FIGURE 1.1 Front and Rear Panels
2282-122-21 Manual, Rev. A
Page 3
07/01/20
