HO1079
•
•
•
SAW Frequency Stabilization
Fundamental-Mode Oscillation at 1090.0 MHz
Ideal for Air Traffic Control Applications
1090.0 MHz
SAW
Oscillator
The frequency of this oscillator is stabilized by surface-acoustic-wave (SAW) technology. This results in ex-
cellent performance from a compact, rugged, oscillator operating at the fundamental frequency of 1090.0
MHz. The highly-reliable HO1079 is designed for use in air traffic control (ATC) radar transponders in com-
mercial aviation. It is a commercial version of the HO1081 oscillator.
Absolute Maximum Ratings
Rating
Value
0 to +13
Units
VDC
DC Supply Voltage
Ambient Temperature
Powered
Storage
-40 to +85
-40 to -100
Dip 16-8 Case
°C
Electrical Characteristics
Characteristic
AbsoluteFrequency
Sym
Notes
Minimum
Typical
Maximum
1090.250
±250
Units
MHz
kHz
1090
Operating Frequency
f
1089.750
O
1, 7
Tolerance from 310.0 MHz
Df
O
+8
RF Output Power
Discrete Spurious
P
3, 6
+10
-25
-35
+14
-20
dBm
O
Second Harmonics
2, 3, 4
dBc
Third and Higher Harmonics
-30
-80
Nonharmonic
1 kHz Offset
<-100
-100
-90
SSB Phase Noise
2, 3, 4
dBc/Hz
W
10 kHz Offset
-120
50
-110
Nominal Impedance
RF Impedance
Z
3
O
Operating Load VSWR
Operating Voltage
Operating Current
G
3, 5
1.5:1
L
DC Power Supply
11.75
-40
12.25
V
12.0
35
VDC
mA
°C
CC
CC
3, 6
3, 6
40
I
Operating Ambient Temperature
T
+85
A
Lid Symbolization (YY=Year, WW=Week)
RFM HO1079 YYWW
BLOCK DIAGRAM
CAUTION: Electrostatic Sensitive Device. Observe precautions for
handling, COCOM CAUTION: Approval by the U.S. Department of
Commerce is required prior to export of this device.
V
CC
Notes:
1. One or more of the following United States patents apply: 4,616,197; 4,610,681; and
RF OUTPUT
4,761,616.
SAW Oscillator
Buffer Amplifier
2. Unless noted otherwise, all specifications are listed at T = +25°C ±2°C, V = nom-
A
CC
inal voltage ±0.01 VDC, and load impedance = 50 W with VSWR £ 1.5:1.
3. The design, manufacturing process, and specifications of this device are subject to
change without notice.
ELECTRICAL CONNECTIONS
V
4. Applies to oscillator only and not to sidebands caused by external electrical or
mechanical sources. (Dedicated external voltage regulation with low-frequency filter-
ing for the DC power supply and proper circuit board layout are recommended for
optimum spectral purity.)
Ground 1
CC
15 Ground
Ground 2
Top
View
5. For specified maximum operating load VSWR (any angle) at F . (No instability or
O
damage will occur for any passive load impedance.)
Ground 7
Output 8
10 Ground
Ground
9
6. For any combination of V and T within the specified operating ranges.
CC
A
7. Applies for any combination of Note 5 and 6 conditions.
RF Monolithics, Inc.
RFM Europe
Phone: (972) 233-2903
Phone: 44 1963 251383
Fax: (972) 387-8148
Fax: 44 1963 251510
E-mail: info@rfm.com
http://www.rfm.com
HO1079-111201
Page 1 of 2
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RFM [ RF MONOLITHICS, INC ]
