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Features:
FDD downlink-only 25W amplifier – Provides 44±1dBm output power across B1 (2.1GHz), B3 (1.8GHz), and B8 (900MHz), tailored for FDD cellular downlink boosting.
Low EVM for high-order modulation – Achieves ≤3% EVM at 10.0dB peak-to-average ratio, supporting clean amplification of 64QAM and higher-order 4G/LTE signals.
Dual-path RF interface – Equipped with 2× MCX (PA IN, LNA OUT) and 2× SMA (PA OUT, LNA IN) connectors, enabling flexible integration with external duplexers or circulators.
RS485 monitoring at 19200 baud – Real-time queries of forward power (±1dB accuracy over >20dB range), module temperature (±3°C from -25°C to +85°C), ATT value, and operational status.
Active over-power and over-temperature reporting – Triggers alarm when output exceeds rated max by +2dB; shuts down at +85°C and auto-restarts at 65°C with host notification.
Downlink gain and ALC control – Provides ≥25dB gain adjustment range and ≥10dB ALC range, with gain flatness ≤±1.5dB across 25dB attenuation steps.
Low uplink noise figure for receiver sensitivity – Achieves ≤2dB noise figure on the uplink LNA path, improving base station or repeater receive performance.
Pre-distortion ready with moderate current draw – Consumes ≤3A at 28V when pre-distortion is enabled, balancing linearity and power efficiency.
Compact 130×90×23mm enclosure – Space-saving mechanical design suitable for integration into remote radio units, small-cell nodes, and indoor repeater systems.
Comprehensive fault detection suite – Continuously monitors VSWR, power output, temperature, and internal circuit status, with active fault reporting via RS485 for remote diagnostics.
Technical Specification:
Product Name:
1. UZI-FDD-B1-2.1G-25W-139-28V
2. UZI-FDD-B3-1.8G-25W-139-28V
3. UZI-FDD-B8-900M-25W-139-28V
Items: | Uplink (UL) & Downlink (UL) Specifications: |
Frequency Range: | 1. B1: a. UL:1920MHz -1980MHz b. DL:2110MHz -2170MHz 2. B3: a. UL:1710MHz -1785MHz b. DL:1805MHz -1880MHz 3. B8 a. UL:880MHz -915MHz b. DL:925MHz -960MHz |
Max Gain: | 1. UL:25±2dB 2. DL:53±2dB |
Maximum Output Power: | 1. UL:Uncontrolled 2. DL:44±1dBm |
Maximum Input Level: | 1. UL:NONE 2. DL:+10dBm |
Gain Adjustment Range: | 1. UL:NONE 2. DL:≥25dB |
ALC Range: | 1. UL:NONE 2. DL:≥10dB |
Gain Flatness: | 1. UL:NONE 2. DL a. ATT10dB： ≤±1dB b. ATT20dB： ≤±1dB c. ATT25dB： ≤±1.5dB |
In-Band Ripple: | ≤2.5dB |
Noise Figure: | 1. UL:≤2dB 2. DL:NONE |
Tx-Rx Isolation: | ≥55dBc |
EVM: | ≤3% (Peak-to-Average Power Ratio 10.0dB) |
VSWR: | 1. UL:≤1.4 (Test condition: power on for testing after turning off the uplink power amplifier.) 2. DL:≤1.4 (Test condition: power on for testing after turning off the downlink power amplifier.) |
Operating Voltage: | 28V |
Operating Current: | With pre-distortion: ≤3A |
Baud Rate: | 19200 |
Working Temperature: | -40~+55℃ |
Over-Temperature Protection: | Alarm and shutdown at +85℃, resume operation at 65℃ |
Monitoring Functions: | 1. For the wiring diagram of the monitoring port, refer to the outline dimension drawing; RS485 interface communication a. Settings: switch, gain; b. Query: module status (including power amplifier status, over-power alarm, over-temperature alarm), power amplifier temperature, power amplifier ATT value, detected forward power; c. Over-power alarm: alarm when the power exceeds the maximum output power by +2dB; d. Over-temperature alarm: recommended threshold is +85℃; alarm is triggered when the detected temperature exceeds +85℃, and the power amplifier is turned off simultaneously, then turned on at +65℃; e. Power amplifier temperature detection: the detection range shall include but not be limited to -25℃~+85℃, with a detection accuracy of ±3℃; f. Forward power detection: the detection range shall be greater than 20dB, with a detection accuracy of less than ±1dB; |
Connecters: | • 2 MCX connectors: Designated as PA IN and LNA OUT • 2 SMA connectors: Designated as PA OUT and LNA IN |
Chassis Dimensions | 130*90*23 |
Silkscreen: | Inspect silk screen markings in accordance with the outline dimension drawing |
Dimensional Drawing:
Sample:
