21_channel_fmo.pdf

Frequency Multiplier
Oscillator (FMO)
SPECTRUM MICROWAVE
The Frequency Multiplier Oscillator (FMO) is a compact
21 channel synthesized signal generator that provides
transmit and LO signals for L-band and S-Band airborne
radar systems. This design incorporates a unique isolation
system for exceptional phase noise performance during
vibration.
This ruggedized design has successfully passed
environmental qualification for Temperature-Altitude,
Humidity, Salt Fog, Vibration, Acoustical Noise, and Shock
Testing. Interested parties should contact the factory directly
for exact levels and conditions used for environmental test.
Typical Performance Characteristics
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21 Transmit channels
21 first LO channels
195 MHz fixed second LO.
5 MHz fixed third LO
5 MHz differential TTL processors clock
All signals are coherent to an internal reference
Frequency accuracy +/- 0.3 PPM after an 8 minute warm-up
Residual FM noise measured 100%
Biphase modulation on transmit and first LO
Output Power 27 dBm min
Output Frequency “L” through “S” Band
Frequency Switching Time <50 ms
Modulation
J1-22
Differential
line driver
F1-800-200 or F1-800-150
F1 Freq
Coupler
10 MHz
Frequency
Standard
VCO3
Divide
by 2
50 MHz
X2
Multiplier
X3
Multiplier
Divide
by 10
5 MHz
Differential
line driver
Amp
F1
Mixer
Coupler
Amp
Bandpass
Filter
F1
J3
Amp
VCO2
F1+200 MHz
Bandpass
Filter
Amp
F0
J2
200 MHz
150 MHz
Mixer
X2
Multiplier
Amp
400 MHz
5 MHz
Divide
by 2
100 MHz
VCXO
Note:
Only 1 of the 3
VCOs are active
depending on the
channel selected.
Coupler
800 MHz
Loop
Filter
VCO1
Biphase
Modulator
200 MHz
Phase
Detector
Loop
Filter
Phase
detector
150 MHz
SPDT
switch
200 MHz
800 MHz
F1-800
MHz
divide
by N
200 MHz
Mixer
5 MHz
Lowpass
Filter
Mixer
Amp
X2
Multiplier
Filter
195 MHz
Filter
F2
J4
5 MHz sine
J5
J1 pins 8 and 20
5 MHz
Differential TTL
CERTIFIED
SPECTRUM MICROWAVE • 2707 Black Lake Place • Philadelphia, PA 19154 • Phone: (215) 464-4000 • Fax: (215) 464-4001
SPECTRUM CONTROL GmbH • Hansastrasse 6 • 91126 Schwabach, Germany • Phone: (49)-9122-795-0 • Fax: (49)-9122-795-58
www.specwave.com
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