Comtech EF Data CPA Indoor C-Band SSPAs
- Output Frequency: 5.850 - 6.425 GHz
- Power Output to 350W
- Noise Figure: 15 dB max @ max gain
- Input Interface: N-Type Female
Comtech EF Data CPA Indoor C-Band SSPA
The Comtech EF Data Model CPA Indoor C-Band SSPA delivers 50, 100, or 200 Watts guaranteed, at the 1 dB compression point, to the transmit waveguide flange.
The Comtech EF Data CPA provides a cost effective and more reliable replacement for Traveling Wave Tube (TWT) amplifiers in C-Band terminals. Due to its small rack height, it is also ideal for the construction of small 'flyaway' terminals, medium size (equivalent to Intelsat F) earth stations, and hub earth stations for small to medium size private networks, or point-to-point links.
The Solid-State Advantage
The SSPA is constructed with highly reliable Gallium Arsenide Field Effect Transistors (GaAs FETs). With third order inter-modulation products rom 4 to 6 dB better than TWT ratings, the CPA unit replaces TWTs with saturated power levels up to 400 Watts. The CPA also provides a Mean Time Between Failure (MTBF) that is 5 to 6 times greater than the typical TWT MTBFs.
The CPA 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, rack slides, and full remote monitor and control capabilities.
The SSPA consists of a chassis, power supply, fan assembly, front panel assembly, Monitor/Control Processor (MCP), and an SSPA module. The amplifier was designed using a Comtech EF Data low-loss combining technique and an MCP-based temperature versus gain compensation.
The SSPA front panel contains a user-friendly Liquid Crystal Display (LCD) menu display and cursor control keys in order to display status or change parameters. The front panel also has LEDs for quick reference to binary status points and both input and output sample ports at -20 and -40 dBc for easy test point access.
Built In Redundancy Controller
Each SSPA 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||5.850 to 6.425 GHz|
54.0 dB min., 57.0 dB typ.
63.0 dB min., 67.0 dB typ.
70.0 dB min
|Adjust||20 dB in 0.25 dB Steps|
±0.75 dB ±1.00 dB
|Per 40 MHz||±0.25 dB|
|+0 to +50°C||±0.50 dB@ center freq.|
±1.00 dB full band
|Third Order Inter-Modulation|
+56 dBm min, 58 typ
+59 dBm min, 61 typ
+62 dBm min, 63.5 typ
+64.5 dBm min, 66.5 typ
-32 dBc typ, -25 dBc max @ 3 dB total backoff
(two tones, f+ 1MHz)
-30 dBc typ, -25 dBc max @3 dB total backoff
|AM to PM Conversion|
|CPA-50/100/200||1.0° typ, 2.5 max at rated output|
|CPA-350||2.0° typ, 3.0 max at rated output|
|Group Delay (per 40 MHz)|
|Ripple||1.0 ns Peak to Peak|
|Second Harmonic||-60 dBc max @ 1 dB below rated output|
|Noise Figure||8 dB typ, 15 dB max @ max gain|
|Display||20 x 2 LCD|
|Data Entry||Cursor Control Keypad|
|Output Sample||Type N, 50, -40 dBc|
|Input Sample||Type N, 50, -20 dBc|
|Com Port||EIA-485 or EIA-232|
|Protocol||Comtech EF Data ASCII or Emulation Mode|
|Summary Fault||Form C|
|CPA-50||19W x 5.25H x 24D inches|
(48W x 13H x 60D cm)
|CPA-100||19W x 8.75H x 24D inches|
(48W x 22H x 60D cm)
|CPA-200||19W x 10.5H x 24D inches|
(48W x 27H x 60D cm)
|CPA-350||19W x 17.5H x 24D inches|
(48W x 44H x 60D cm)
32 to 122°F (0 to 50°C)
-40 to 158°F (40 to 70°C)
(derate 2°C/1000ft AMSL)
|Humidity||10 to 95% Non-condensing Operating|
0 to 100% Non-condensing Storage
|Shock||Normal Commercial Shipping and Handling|
|CPA-50||90 to 135 or 180 to 270 VAC,|
47 to 63 Hz, 500W (Auto-Select)
|CPA-100||90 to 135 or 180 to 270 VAC,|
47 to 63 Hz, 800W (Auto-Select)
|CPA-200||180 to 270 VAC,|
47 to 63 Hz, 1300W (Auto-Select)
|CPA-350||180 to 270 VAC,|
47 to 63 Hz, 3.0 kW