CPI LRK2 1:2 Ku-Band Redundant LNA System, 10.70–12.75 GHz
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Product details
The CPI LRK2 is a 1:2 redundant LNA system from CPI's LRK-1000 Series for Ku-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-12000 Series LNAs (65 to 90 K) on a WR-75 waveguide input, with options for a 13.75–14.50 GHz Tx reject filter, -40 dB input crossguide couplers, -20 dB output couplers and an offline I/O port. The 1RU controller has dual power supplies and SNMP over Ethernet.
Order it as LRK2XXX-XXXXXXX; Digisat completes the order code from your band, LNA and option choices. The LRK-1000 Series comes in 2 listed models; compare them on the series page.
Other models in this series
- LRK1: 1:1 system
Compare all 2 CPI LRK-1000 Series Ku-Band Redundant LNA System models
Specifications
| Part number | LRK2XXX-XXXXXXX |
|---|---|
| Series | CPI LRK-1000 |
| Frequency range | 10.95–12.75 GHz (Band E) or 10.70–12.75 GHz (Band R) |
| LNAs | CPI LK-12000 Series, 65, 70, 80 or 90 K |
| Added system noise temperature (typ.) | Pol. 1 / pol. 2 / standby: 5 / 9 / 14 K standard; 18 / 22 / 27 K with Tx reject filter |
| Gain | 60 dB min., 63 dB typ.; 50 dB min., 53 dB typ. with LNA Option 1 |
| Gain match between LNAs | 1 dB max. |
| Gain flatness | ±0.75 dB full band; ±0.30 dB per 40 MHz |
| Gain stability | ±0.2 dB max. per day at constant temperature; -0.04 dB per °C |
| Input VSWR | 1.20:1 typ., 1.25:1 max.; 1.25:1 typ., 1.30:1 max. with Tx filter |
| Output VSWR | 1.20:1 typ., 1.25:1 max. |
| Output P1dB | +10 dBm min. (+13 dBm typ.); +18 dBm min. with LNA Option 2; +17 dBm min. with LNA Option 2 and output couplers |
| Output IP3 | +20 dBm min. (+23 dBm typ.); +28 dBm min. with LNA Option 2; +27 dBm min. with LNA Option 2 and output couplers |
| Group delay per 40 MHz | 0.02 ns/MHz linear, 0.002 ns/MHz² parabolic, 0.2 ns p-p ripple |
| AM/PM conversion | 0.05°/dB max. at -5 dBm output |
| Max. input power (no damage) | 0 dBm |
| Desensitization threshold, 13.75–14.50 GHz | -20 dBm standard; +30 dBm with Tx reject filter |
| RF input | WR-75 waveguide flange |
| RF output, offline and coupler ports | Type N female (SMA female on request) |
| Plate supply | LNAs: 11–24 VDC (15 V typ.), 10 W typ.; switches: 28 VDC typ., 2 A max. |
| 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 |
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