Comtech EF Data X-Band Indoor Rackmount Solid State Power Amplifier (SSPA)
- Constructed with GaAs FETs
- Field replaceable power supply
- Built-in redundancy controller
- Option free
Comtech EF Data XPA X-Band Indoor Rackmount SSPA
Each Comtech EF Data X-Band Power Amplifier (XPA) series Solid State Power Amplifier (SSPA) delivers it’s rated power, guaranteed, at the 1 dB compression point, to the transmit waveguide flange. It provides a cost effective and more reliable replacement for Transfer Wave Tube (TWT) amplifiers in X-Band terminals. Due to its small form factor, it also is ideal for the construction of small “flyaway” terminals, medium sized (equivalent to Intelsat F class) earth stations, and hub earth stations for small to medium size private networks or point-to-point links.
The Solid-State Advantage
Each XPA series SSPA is constructed with highly reliable Gallium Arsenide Field Effect Transistors (GaAs FETs). With third order inter-modulation products from 4 to 6 dB better than TWT ratings, the Comtech EF Data unit replaces TWTs with saturated power levels of up to twice the XPA’s rated output. The XPA SSPAs also provide a Mean Time Between Failures (MTBF) that is 4 to 5 times greater than the typical TWT MTBFs.
Comtech EF Data’s XPA series of SSPAs come equipped with useful features that other manufacturers offer as options. Included in the base price are temperature compensation, sample ports, power monitor, and full remote monitor and control capabilities.
Each XPA series SSPA consists of a Comtech EF Data SSPA module with the Monitor/Control Processor (MCP), a field replaceable power supply, and a field replaceable fan assembly. The amplifier features a Comtech EF Data low loss combining technique and MCP based temperature versus gain compensation.
Field Replaceable Power Supply
Recognizing that the MTBF limiting factor for almost all electronic equipment is the power supply, the XPA provides for easy field replacement. Simply disconnect the AC mains, release the clasps, and remove the supply from the SSPA module.
Built-In Redundancy Controller
Each Comtech EF Data XPA amplifier has the ability to function as a 1+1 or 1+2 redundancy controller in the backup mode. The optional redundancy configuration is implemented by attaching a ganged waveguide/coax transfer switch (es) to the input and output connectors of the amplifiers with a combination coaxial cable and waveguide kit. When the backup SSPA is commanded into the controller mode, it monitors the online SSPA(s) for faults. A faulted online unit may be disconnected and replaced without affecting the online power amplifier.
The remote control interface is selectable between EIA-232 and EIA-485, as well as full Ethernet including Telnet, SNMP and pre-loaded HTML GUI. All configuration control, status retrieval, and adjustments are available as simple ASCII commands through the serial interface or through the front panel menu. As a cost option, the remote control command structure can be customized in order to accommodate existing network control software.
|Frequency||7.9 to 8.4 GHz|
52.2 dBm min. @ 1 dB compression
53.0 dBm min. @ 1 dB compression
62.0 dB min., 65 dB typical
62.0 dB min., 67 dB typical
|Adjust XPA-175/200||20 dB in 0.25 dB steps|
|Full Band XPA-175/200||± 0.75 dB|
|Per 40 MHz XPA-175/200||± 0.25 dB|
|Third Order Inter-Modulation|
|Intercept XPA-175/200||+60.5 dBm min., 62.0 typical|
|Products XPA-175/200||–30 dBc typical, -25 dBc max.@ 3 dB total backoff (two tone, Δ f+1MHz)|
|AM to PM Conversion|
|2.0° typical, 3.0 max. at rated output|
|Group Delay (per 40 MHz)|
|Linear||± 0.03 ns/MHz|
|Parabolic||± 0.003 ns/MHz²|
|Ripple||1.0 ns peak to peak|
|Carrier Related||-65 dBc|
|Line Related XPA-175/200||-50 dBc|
|Noise Figure XPA-175/200||10 dB typical, 15 dB max.|
|Display||20 x 2 LCD|
|Data Entry||Cursor control keypad|
|Output Sample||Type N, 50 Ω, -40 dBc|
|Input Sample||Type N, 50 Ω, -20 dBc|
|Com Port||EIA-485 or EIA-232|
|Protocol||Comtech ASCII or Emulation Mode|
|Summary Fault||Form C|
| Dimensions (H x W x D)|
11” x 19” x 24” (27 x 48 x 61 cm)
12” x 19” x 24” (31 x 48 x 61 cm)
|Weight XPA-200||100 lbs (45 kg)|
| Temperature XPA-175|
0 to 50°C (32 to 104°F)
(Derate 2° C/1000ft AMSL)-40 to 70°C (-40 to 158°F)
10 to 95% Non-condensing
0 to 100% Non-condensing
|Shock||Normal commercial shipping and handling|
|XPA-175||180 to 270 VAC, 47 to 63 Hz|
|XPA-200|| 100 to 140 (special order) or|
180 to 270 VAC,47 to 63 Hz, 2600 VA