PRELIMINARY
Ku-Band VSAT Transmit ODU
Model CTR-145030
Model CTR-145033
FEATURES
❏ Designed for Broadband Data/IP
and Telephony
❏ World’s Smallest ODU
• 8” (l) x 3.4” (w) x 2.7” (h), 2.3 lbs.
• Highly Efficient Thermal Transfer
❏ 14.0 to 14.5 GHz (Ku-Band) Frequency
❏ Transmit Power 1.5W Typ. P1dB
• 2.0W Typ. Psat
• 1.0W Min. P1dB Over Temp.
• Optional 2.0W Min. P1dB @ +25°C
❏ Low-Cost Transmitter Approach
• ODU Accepts 950-1450 MHz IF Signal
• Single Cable Interface for LO, IF and DC
• LO Input Options:
• 1931.25 MHz
• 10 MHz Ref. (Integral PLO)
• High Efficiency DC/DC Converter
• Protection Against Lightning and ESD
❏ Highly Reliable Design
• Moisture Sealed Thin-Film MW Module
• 300,000 hr Demonstrated MTBF
DESCRIPTION
The CTR-145030 and CRT-145033 are Celeritek’s
standard 1 and 2 watt (respectively) transmitters for the 14.0
to 14.5 GHz VSAT frequency range. The transmitters come in
a ODU (out door unit) assembly of minimum size for
customers designing their own satellite transceivers. They
convert a 950-1450 MHz IF input signal into a 14.0 to 14.5
GHz output signal via a waveguide interface.
The CTR-145030 output power offers a minimum of 30
dBm (@ 1dB gain compression point) under all input
electrical and environmental conditions. At the normal
operating output power of 28.5 dBm, the spectral regrowth is
better than -26 dBc. The device draws a maximum DC current
of 2.0 amps (1.5 amps Typ.) at +13 volts at the input of the Fconnector.
The ODU includes a complete printed circuit assembly
(PCA) containing a four-function assembly comprised of: 1.)
triplexer - LO/Ref., IF & DC separation; 2.) IF signal
amplification and gain temperature compensation; 3.) LO/Ref.
signal amplification and; 4.) High efficiency DC to DC
converter.
The unobtrusive module is weather-sealed, weighs only
2.3 pounds and is designed to mount directly to the feed
assembly – without additional bracketing or supports.
Model
Configuration
CTR-145030-1
1W, LO: 1931.25 MHz
CTR-145033-1
2W, LO: 1931.25 MHz
CTR-145030-2
1W, Ref.: 10 MHz
CTR-145033-2
2W, Ref.: 10 MHz
EXPERIENCE AND CAPABILITIES
As one of the world’s largest suppliers of VSAT
transmit ODUs, Celeritek can offer the lowest prices using
our high-volume production line to achieve efficiencies not
possible with smaller production lines.
The company’s in-house GaAs FET and MMIC
capabilities, along with extensive amplifier products, provide
the basis for Celeritek to offer these high-performance
products at competitive prices. Also, the company uses a
combination of thin-film and softboard techniques to reduce
manufacturing costs and maintain high reliability.
Celeritek’s dedicated production line and engineering
team for communication products is highly experienced in the
development and production of high-reliability, low-cost
VSAT products.
PRELIMINARY
Ku-Band VSAT Transmit ODU
Transmitter Block Diagram
DC
CHOKE
DC/DC
CONVERTER
+9 VDC
-Vg
TEMPERATURE GAIN
COMPENSATION
CABLE
INPUT
TRANSMIT
OUTPUT
IF
BPF
BPF
X8
MULTIPLIER
REF
BPF
U
U
OPTIONAL PHASE
LOCKED OSCILLATOR
WITH 10 MHz REFERENCE
LPF
PHASE NOISE (dBc/Hz)
WITH INTEGRAL PLO
-65 @ 100 Hz
-75 @ 1 kHz
-82 @ 10 kHz
-100 @ 100 kHz
SPECIFICATIONS
Parameter
Frequency Range, GHz
Output Power, dBm (Min)
Option (Min)
Gain, dB (Typical)
Gain Flatness, dB (Max)
Gain vs Temperature, dB (Max)
Frequency Sense
Spurious Output
Phase Noise Addition, dB
IF Frequency, MHz
LO Frequency Input Options, MHz
Operating Temperature
Transmit Duty Cycle
Power Consumption, Watts
Connectors/Interface
Size, Inches
Weight, lbs.
MTBF, Hrs.
Environmental Screening
Paint
3236 Scott Boulevard
Santa Clara, California 95054
(408) 986-5060 Fax: (408) 986-5095
Web: www.celeritek.com
10/98
Specification
14.0-14.5
30 (+32 Typ @ 25°C)
33 (Typ)
33 (@ +25°C)
43–47 (@ +25°C)
42–48 (-40°C – +55°C)
±2.0 (500 MHz Bandwidth)
±0.75 (54 MHz Bandwidth)
2.0
3.0
Inverted
< -40 dBc/4 kHz
< -120 dBm/4 kHz (Noise)
< -90 dBm (Spurious)
< -30 dBm/4 kHz
< -30 dBm/4 kHz
< -50 dBm/4 kHz
LO input phase noise +19
950–1450
1931.25
10 (Integral PLO)
-40°C to +55°C
0 – 100%
26 (Max.) / 20 (Typ.)
In: Type F, female O-Ring sealed
Out: WR-75 Waveguide
8.0 (l) x 3.4 (w) x 2.7 (h)
2.3
300,000
Temperature Cycle (10) & 48 Hr Burn-In
White, Environmentally Qualified
Conditions
—
P1dB, -40°C to +55°C
Psat
P1dB
14.0–14.5 GHz
—
-40°C to +55°C
-40°C to +55°C
Over any 40°C range
-40°C to +55°C
High Side LO
13.85–14.65 GHz
10.9–12.75 GHz
10.9–12.75 GHz
14.65–14.9 GHz
13.6–13.85 GHz
All Other
1931.25 MHz Input
Final LO is High Side @ 15.45 GHz
LO Input -15 to +5 dBm
LO Input -5 to +5 dBm
—
—
+13 to +24 Volts Input
—
—
—
—
@+25°C
100%
Epoxy Prime Coat/Polyurethane Top Coat