Instruction manual

MODEL 1200-88 Dual IF Amplifier
1.0 General
1.1 Equipment Description
The 1200-88 IF Amplifier is a dual channel amplifier each providing manual gain control (MGC) for a 0.1 to
100 MHz IF signal for a -50 to 0 dBm input signal. The gain can be manually adjusted from -25 to +25 dB for
up to a +10 dBm output. The 1200-88 has a band limiting lowpass filter. Multi-function push button switches
select the gain of each channel (-25 to +25 dB, selectable in 1 dB steps) and the settings appear on the LCD
display. Front panel LEDs light when DC power is applied (green) or the output level exceeds +13 dBm (red).
Connectors are BNC female for IF input and output. A DB9 connector provides indication and remote control
of gain via a 9600 baud, RS232C interface. The 1200-88 is powered by a 100-240 ±10% VAC switching power
supply and is housed in a 1RU x 16” deep chassis.
MENU
EXECUTE
MODEL 1200
CROSS TECHNOLOGIES INC.
G1=-10 LVL1=<+5
G2=+15 LVL2= +12
REMOTECH2
PEAK
POWER ALARM
AMPLIFIER
CH1
PEAK
FRONT PANEL
AC
GND
J4 J5J1
OUTPUT
INPUT
OUTPUT
J10
AND
MONITOR
CONTROL
15 234
6789
J2
INPUT
CHANNEL 1 CHANNEL 2
REAR PANEL
FIGURE 1.1 Front and Rear Panels
IF 2
OUT
IF 2
IN
ATT ATT
PK
Alarm2
IF 1
OUT
IF 1
IN
ATT ATT
CONTROLLER
PK LED 2
PK LED 1
PK
Alarm1
FIGURE 1.2 Block Diagram
1200-88 Manual, Rev. A Page 3 8/18/10