GD Satcom QuadMOD 400W X-Band Rack-mount SSPA
- Completely modular RF Systems
- Parallel Architecture
- Easy operation and maintenance
- Phase-combined systems
GD Satcom QuadMod Features
- Modular Architecture
- 3-Year All-inclusive Warranty
- Worldwide Service
- Proven Reliability
- CE Certified
- Output Frequency: 7.9 - 8.4 GHz
- Single Thread
- Output Power: 316W @P1dB
GD Satcom QuadMod SSPAs are completely modular RF amplifier systems that offer output powers of up to 800 watts in C-Band, 700 watts in X-Band, or 400 watts in Ku-Band. Based on technology used in our field-proven ModuMAX amplifiers, QuadMod SSPAs utilize field-replaceable RF modules, power supplies and electronic assemblies to maximize performance and minimize downtime in SATCOM systems.
QuadMod Power Options
Since solid-state power amplifiers (SSPAs) consist of multiple transistors in parallel, they naturally contain a degree of built-in redundancy. With proper attention to design architecture, the use of multiple parallel RF modules, and the elimination of all active devices from the common RF path, GD Satcom has designed an SSPA that is reliable and extremely fault-tolerant.
RF Plug-In Modules
QuadMod SSPAs consist of four identical and fully interchangeable RF plug-in modules. Module status is indicated by an LED on each module as well as the control panel display.
Complete failure of a module causes a drop of only 2.4 dB in output power, without the momentary loss of signal caused by redundant switchover systems. Defective modules can be hot-swapped while the SSPA continues to operate. Spare RF modules are affordable, since they contain only a fraction of the RF power transistors in the SSPA.
Easy to Operate and Maintain
QuadMod SSPAs are designed to be easy to operate and maintain. Commonly used controls are brought out to the front panel for quick and easy access. All features are fully remote controllable through the standard RS-232/-422/-485 and network interfaces.
Servicing is fast and easy with four hot-swappable RF modules that are accessible from the front panel. Modules can be removed and replaced while the SSPA continues to operate.
Any of the four fans in the air-cooling system can be easily removed and replaced, without taking the SSPA off-line. Even the power supply is N+1 redundant, consisting of three hot-swappable plug-in modules, any two of which are fully capable of powering the entire amplifier.
QuadMod is easy to expand. Phase-combine two SSPAs for double the power output in only 35" (20 RU) of rack space. An added bonus—with 8 RF modules, one failed module causes only a 1.2 dB drop in output power.
Outline Drawing, Typical C-Band SSPA
QuadMod also incorporates redundancy into its integral forced-air cooling system. Enough margin is built into the design to tolerate the loss of one cooling fan. Fans are monitored for rotational speed, and failure of a fan is indicated on the control panel display. In the event of a fan failure, the SSPA can continue to operate until a replacement is installed. The air cooling system utilizes separate front panel air intake and rear panel exhausts. Exhaust air can be ducted outdoors or into the room.
System power is supplied by three identical modules in an “N+1” configuration. If a module fails, the remaining two can supply 100% of the required load current and the defective module can be hot-swapped without interruption. QuadMod operates from either single- or three-phase ac, allowing considerable flexibility in installations and worldwide operation.
Global EMC and Safety Compatibility
QuadMod SSPA systems are certified to applicable EU EMI/EMC and safety standards.
|400W X-Band QuadMOD Technical Specifications|
|Frequency Range||7.900 - 8.400 GHz|
|Gain, at Maximum Setting||70 - 75 dB|
| Gain vs. Temperature (0 to 50 °C) Nom/Typ|
|Gain Adjust Range Digital, 0.1 dB steps||20 dB|
| Gain Flatness|
per 40 Mhz
|Saturated Power Output||+56.0 dBm (400 W)|
|Power Output, at 1 dB Compression (P1 dB)||+55.0 dBm (316 W)|
|Two-Tone Intermodulation At 3 dB backoff from P1 dB||-25 dBc max|
| Group Delay|
1.0 ns p-p
|AM/PM Conversion At P1 dB|| 2.5°/dB typ.|
|Second Harmonic At P1 dB||-60 dBc|
|Spurious at P1 dB||-70 dBc|
|VSWR Input, Output||1.3:1 max|
|Sample Ports Input/Output||-10/-50 dBc|
|Power Requirements||SEE DATASHEET|
|Cooling System||Forced Air|
|Operating Temperature (Ambient/inlet air)||0 to +50°C|
|Altitude Derating 10,000 ft (3000 m) max.||Derate 2°C per 1000 ft (300 m)|
RF Unit (7U panel ht.)
Power Supply (4 U ht.)
19.0 W x 12.25 H x 29.38 D inches
483 W x 311 H x 746 D mm
19.0 W x 7 H x 22 D inches
483 W x 178 H x 559 D
180 (82) lb (kg)
88 (40) lb (kg)