Model 2412-x08
Multi-Channel AGC Amplifier
2412-408 Four Channel • 2412-308 Three Channel • 2412-208 Two Channel • 2412-108 One Channel
1.0 General
1.1 Equipment Description
The 2412-x08 AGC Amplifier has either 1, 2, 3, or 4 individual channels*, each one provides automatic gain
control (AGC) or manual gain control (MGC) for a 50-200 MHz signal. It takes a -35 to 0 dBm input signal and
automatically adjusts the gain for a 0 to +10 dBm (± 1 dB) output which can be adjusted using the front panel
multi-function switches. Front panel LEDs provide indication of DC power, Channel Status and Remote
Operation. Each channel has a band limiting lowpass filter. Each channel gain can also be adjustable manually
(MGC) over a 0 to +45 dB range using the front panel multi-function switches. AGC/MGC, output level (in
AGC) and gain (in MGC) of each channel are remotely selectable. Parameter selection and output level (in
AGC) and gain (in MGC) settings appear on the LCD display. Connectors are BNC female for the input and
output signals. Table 1.0 shows model numbers for the 4, 3, 2, and 1 channel versions and other available
options. The 2412-x08 is powered by a 100-240 ±10% VAC, 47-63 Hz power supply, and is contained in a 1
3/4” X 19” X 16” rack mount chassis.
* 2412-408 Four (4) Channels, 2412-308 Three (3) Channels, 2412-208 Two (2) Channels, 2412-108 One (1) Channel.
MENU
EXECUTE
MODEL 2412
C
ROSS
T
ECHNOLOGIES INC.
AMPLIFIER
REMOTE POWER
CHANNEL STATUS
------ CH 1 ------ ------ CH 2 -----
1
2
3
4
A
B
AGC L=+2 MGC G=+35
MGC G=+20 AGC L=+10
------ CH 3 ------ ------ CH 4 -----
FRONT PANEL (2412-408 - Four Channel shown)
PSA
GND
J11
CHANNEL 4
J10
J9
CHANNEL 3
J5
CHANNEL 1
J2
J1
RF IN
CHANNEL 2
J7
J6
PSB
RF OUT
RF IN
RF OUT
J12
AND
MONITOR
CONTROL
1
5
2
3
4
6
7
8
9
RF OUT
RF IN
RF OUT
J8
RF IN
REAR PANEL (2412-408 - Four Channel shown)
FIGURE 1.1 Model 2412-x08 Front and Rear Panels
SW,,ATT,
CONTROL
M&C
CONTROLLER
2412-08
Block
Diagram
SAME FOR FREQUENCY CHANNEL 2
SAME FOR FREQUENCY CHANNEL 3
SAME FOR FREQUENCY CHANNEL 4
------ CH 1 -------- ------ CH 2 --------
------ CH 3 -------- ------ CH 4 --------
= PROCESSOR
CONTROLLED
RF 1
OUT
RF 1
IN
AGC
CONTROL
ATT
ATT
AGC
ATT
MGC
AGC L=+2 MGC G=35
MGC G=20 AGC L=+10
FIGURE 1.2 Model 2412-x08 Block Diagram
(Above Block Diagram applies to Models 2412-108, 208, 308 & 408)
2412-408 Manual, Rev. 0
Page 3
09/04/12
