MODEL 3116-7786-2150 Downconverter
1.0 General
1.1 Equipment Description -
The 3116-7786-2150 Downconverter converts 7.75 - 8.65 GHz (Fc = 7.9 - 8.5
GHz) to 2150 ± 150 MHz (non-inverted) in 1 MHz steps (100 kHz, 125 kHz steps optional) with a 5.75 - 6.35
GHz local oscillator. The gain is +35 dB maximum with a 30 dB adjustment in 0.5 ±0.5 dB steps. Front panel
LEDs provide indication of Remote operation, PLL Alarm and DC Power. Frequency and
internal/external/Auto reference mode 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 Type N
female for the RF and BNC female for the L-Band 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. The 3116 is powered by a 100-
240 ± 10% VAC power supply, and housed in a 1 3/4” X 19” X 14” rack mount chassis.
MENU
EXECUTE
MODEL 3116
C
ROSS
T
ECHNOLOGIES INC.
FC = 8200.000
G=+10.0 REF AUTO-I
POWER
REMOTE ALARM
DOWNCONVERTER
FRONT PANEL
AC
RF INPUT
GND
J101
J8
10 MHZ REF
OUTPUT
J11
ALARM
1
5 2
3
4
6
7
8
9
J2
EXT 10 MHZ
INPUT
L-BAND
OUTPUT
J1
J14
REAR PANEL
FIGURE 1.1 Model 3116-7786-2150 Front and Rear Panels
(Shown with optional Ethernet)
2150
±150
MHz
OUT
7.75
to
8.65
GHz
IN
2150 MHz BP
CONTROLLER
7.75-8.65 GHz BP
5.75 -
6.35
GHz
EXT
10MHz
var
atten
INT
10MHz
3116-7786-2150 Block Diagram
AUTO
FIGURE 1.2 Model 3116-7786-2150 Downconverter Block Diagram
3116-7786-2150 Manual, Rev. 0
Page 3
11/24/20
