MODEL 3116-22-23# Two Channel Downconverter
1.0 General
1.1 Equipment Description
The 3116-22-23# Two Channel Downconverter converts 2300 ± 100 MHz to 1400 ± 100 MHz (inverted) with a
3.70 GHz (common) local oscillator. The gain is +35 dB maximum and is adjustable in 0.5 ± 0.5 dB steps.
Front panel LEDs provide indication of Remote operation, PLL Alarm and DC Power. Gain and
internal/external/Auto reference frequency selection are controlled by front panel switches or remote selection
(via RS-232C/485, standard; Ethernet Optional) and are viewable on the LCD Display. Connectors are BNC
female for the RF In and RF Out and external reference input and reference output. In AUTO, the 10 MHz
reference stays in external if the external level is +3 dBm, ±3 dB. It is powered by a 100-240 ± 10% VAC
power supply, and is in a 1 3/4” X 19” X 14” rack mount chassis.
MENU
EXECUTE
MODEL 3116
C
ROSS
T
ECHNOLOGIES INC.
CH1 G=+25.5 REF=
CH2 G=+25.5 AUTO-E
REMOTE
ALARM
POWER
DOWNCONVERTER
FRONT PANEL - 3116-22-23#
AC
GND
J20
J2
J1
J10
MONITOR
AND
CONTROL
1
5
2
3
4
6
7
8
9
RF IN
RF OUT
J18
J3
10 MHz REF
OUTPUT
10 MHz
EXT REF
INPUT
J4
RF IN
RF OUT
J5
- CH2 -
- CH1 -
REAR PANEL - 3116-22-23# (Shown with optional RJ45 Ethernet Connector)
FIGURE 1.1 3116-22-23# Front and Rear Panels
SW,PLL,ATT,
VCC CONTROL
M&C
CONTROLLER
CH!
2.2-2.4
GHz IN
V
A
R
A
T
T
2.0 to 2.5
GHz BP
3.70 GHz
1.5 GHz LP
CH1
1.3-1.5 GHz
OUT
EXT
10 M
10 M
TO
PLLS
10 M
MON
AUTO
3116-22-23#
Downconverter
Block Diagram
CH!2
2.2-2.4
GHz IN
CH2
1.3-1.5 GHz
OUT
CHANNEL 2 - SAME AS ABOVE
FIGURE 1.2 3116-22-23# Block Diagram
3116-22-23# Manual, Rev. 0
Page 3
04/14/16