CPI LRKA2 1:2 Ka-Band Redundant LNA System, 17.7–21.2 GHz
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Product details
The CPI LRKA2 is a 1:2 redundant LNA system from CPI's LRKA-1000 Series for Ka-Band earth stations. It protects two receive chains, typically both polarizations of a dual-pol feed, with one shared spare LNA. If either online LNA fails, the indoor controller switches the spare into that chain automatically.
The plate carries CPI LK-20S000 Series LNAs (110 or 120 K) on a WR-42 waveguide input, with options for an 85 dB, 27.5–31.0 GHz Tx reject filter, -40 dB input crossguide couplers, -20 dB output couplers, an offline I/O port and green or tan LNA finishes. The 1RU controller has dual power supplies and SNMP over Ethernet.
Order it as LRKA2XXX-XXXXXXX; Digisat completes the order code from your band, LNA and option choices. The LRKA-1000 Series comes in 2 listed models; compare them on the series page.
Other models in this series
- LRKA1: 1:1 system
Compare all 2 CPI LRKA-1000 Series Ka-Band Redundant LNA System models
Specifications
| Part number | LRKA2XXX-XXXXXXX |
|---|---|
| Series | CPI LRKA-1000 |
| Frequency range | 18.2–20.2 GHz (A), 20.2–21.2 GHz (B) or 17.7–21.2 GHz (C) |
| LNAs | CPI LK-20S000 Series, 110 K (bands A and B) or 120 K |
| Added system noise temperature (typ.) | Pol. 1 / pol. 2 / standby: 7 / 11 / 16 K standard; 18 / 22 / 27 K with Tx reject filter |
| Gain | 56 dB min.; 46 dB min. with LNA Option 1 |
| Gain flatness | ±1.5 dB full band; ±0.5 dB per 40 MHz |
| Gain stability, constant temperature | ±0.1 dB (10 min), ±0.2 dB (24 h), ±0.5 dB (1 week) typ. |
| Gain vs. temperature | 5.0 dB p-p typ. |
| Input VSWR | 1.50:1 typ. |
| Output VSWR | 1.25:1 typ. |
| Output P1dB | +10 dBm min.; +18 dBm min. with LNA Option 2; +17 dBm min. with LNA Option 2 and output couplers |
| Output IP3 | +20 dBm min.; +25 dBm min. with LNA Option 2; +24 dBm min. with LNA Option 2 and output couplers |
| Group delay per 40 MHz | 0.02 ns/MHz linear, 0.002 ns/MHz² parabolic, 0.40 ns p-p ripple |
| AM/PM conversion | 0.05°/dB max. at -5 dBm output |
| Max. input power (no damage) | 0 dBm |
| Desensitization threshold, 27.0–31.0 GHz | -15 dBm standard; +35 dBm with Tx reject filter |
| RF input | WR-42 waveguide flange |
| RF output, offline and coupler ports | SMA female (Type N female on request) |
| Plate supply | 11 VDC min., 28 VDC max.; 10 W typ. |
| Plate operating temperature | -40 °C to +60 °C |
| Controller | 1RU, 19 in rack mount; dual redundant power supplies; universal AC input |
| Controller M&C | 10/100Base-T Ethernet (SNMP v1/v2c/v3), RS-232/422/485 serial, parallel I/O |
Need it installed, aligned or supported?
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