Low-Cost and High Performace in a 1.75” High Chassis
Built-in 1:N Series Switching Option
High Receive Intercept/Dynamic Range
Low Phase Noise
125 kHz Frequency Resolution (optional 1 KHz)
RS-232/-422/-485 Operator Serial Interface
Plug-and-Play Compatibility With Radyne Low-Cost 1:1
and 1:N Switches
Available in Extended Frequency Bands
SFC4200A C-Band Synthesized Frequency Down Converter
The Radyne SFC4200A C-Band Synthesized Frequency Down Converter has been designed to provide performance that meets or exceeds
industry standards. The SFC4200A features also provide ease of integration and operation. Designed to handle extreme ratios of
adjacent carrier power, the SFC4200A offers the highest standard input P1 dBm in the industry at -19 dBm.
With a typical noise figure of
10 dB at 40 dB gain, the SFC4200A can receive signals below -110 dBm with an aggregate input power of -25 dBm. This represents a
receive dynamic range in excess of 85 dB. At 40 dB of gain standard, or with the 60 dB gain option, the SFC4200A will easily integrate
into any size earth station while eliminating the need for receive line amplifiers, even for installations that employ power splitters on the
downlink. Linearity of the converter is equally impressive. The SFC4200A boasts a two-tone IMD product of 60 dBc for a combined output
power of 0 dBm. Output P1 dBm of the converter is +20 dBm. In most installations this allows IF power splitters to be used without the
need for IF distribution amplifiers.
Monitor and Control
All of the configuration, monitor and control functions are available at the front panel. Operating parameters such as frequency, channel,
gain, gain offset and switch settings (backup only) can be readily set and changed at the front panel. Additionally, all functions can be
accessed with a terminal or personal computer via a serial link (RS-232, RS-485, or Ethernet) for complete remote monitor and control
(M&C) capabilities. Extensive fault monitoring with masking capability, along with time and date stamped event storage are available.
Protection Switch Versatility
Redundancy for the SFC converter products can be supported by an external rack mounted RCU101 (1:1) or RCU108 (1:N) system.
These redundant systems are designed to ensure continuous operation thus allowing a unit to be replaced without disruption of the signal
transmission. The RCU101 or the RCU108 can be easily configured by connecting the cables and starting the plug and play process.
Identical firmware enables any converter to be plugged into the backup slot and assume the role of protection switch controller. It is the
backup converter that learns and stores the frequency, gain and channel settings of the primary converters. The backup converter can be
operated automatically, in which case an automatic backup of a failed on-line converter occurs after a user pre-programmed delay. The
backup may also be operated manually, allowing the operator to manually switch-in the backup unit. In the event the stored setting of the
primary converter is changed, the backup converter will notify the user.
Switching configuration settings, such as priority, fault delay, force and learn controls, backup testing, and compensation, are available on
the front panel and all serial interfaces. Status information on all primes, such as summary fault, learn and backup status tests,
configuration change, relay status, and converter type, is also available. All circuits are protected upon installation of the switch and upon
completion of the learning process. This eliminates the need for complicated software configurations that might otherwise leave a circuit
vulnerable. Likewise, replacing a failed converter is as simple as plugging in a replacement.
-25 dBm Aggregate Signal; Power to -110 dBm Carrier Level
Connector
N, Type-F
Output Characteristics
Frequency
70 MHz ±20 MHz Standard
140 MHz ±40 MHz Optional
Impedance
75 Ohms
Return Loss
>23 dB
P1 dBm Output
+20 dBm
Connector
BNC, F
Transfer Characteristics
Type
Double Conversion,No Spectral Inversion
Gain
40 dB Maximum @ 0 dB Total Attenuation (60dB Optional)
Gain Control
40 dB in 0.1 dB Increments
(0 dB to +40 dB Conversion Gain)
Gain Ripple
±0.25 dB/36 MHz, ±0.5 dB/76 MHz
Gain Slope
±0.05 dB/MHz
Gain Stability
±0.25 dB/24 Hours, ±1.0 dB; 0 to 50°C
Noise Figure
11 dB Maximum @ 0 dB Attenuation
Spurious
-80 dBm Local Oscillator Related Spurious
(In-Band) at Minimum Attenuation
-65 dBc Signal Related Spurious (In-Band) at Minimum
Attenuation
Third Order Intercept
+30 dBm -60 dBc IMD Two Tones With 0 dBm Total Output
Power
AM/PM Conversion
0.1°/dB
Image Rejection
>80 dB
Group Delay
Linear
0.025 nsec./MHz
Parabolic
0.005 nsec./MHz²
Ripple
1 nsec. p-p for ±18 MHz
Frequency Synthesizer Characteristics
Resolution
125 kHz Step Size (optional 1 KHz)
Stability
±5 x 10-9 Over Temperature
(0 to 50°C) +1 x 10-9/24 Hours
Accuracy
±5.0 x 10-9 After 20 Minutes
Physical Characteristics
Size
19" x 1.75" x 19" deep
(48.26cm x 4.44cm x 48.26cm deep)
Weight
12 lb. (5.44 Kg)
Primary Power
100 - 240 VAC, 50 - 60 Hz, 1.0 A
Power Consumption
50 Watts
Environmental Characteristics
Operating Temperature
0 to 50°C
Humidity
To 95% Non-Condensing
Altitude
To 8,000 Feet (2438.4 meters) AMSL
Shock and Vibration
No loss of frame synchronization at the BER Test set
due to a standard hammer drop test on any outside
surface of converter. Likewise, no loss of frame sync for
temp gradient of ± 22°C/Hour
