丨
Features:
TDD bidirectional 25W amplifier – Provides 44±1dBm downlink output across B34/B39/B40 (1.9–2.3GHz) with ≤2.5A current draw at 28V, supporting both uplink and downlink paths in TDD systems.
CMOS 3.3V frame sync control – Independent logic inputs for TX/PA and RX/LNA switching (high=on, low=off), enabling precise alignment with TDD slot timing.
Low in-band ripple performance – Achieves ≤2.5dB ripple for B40 and ≤2dB for B34/B39, ensuring consistent gain flatness across operating bands.
RS485 telemetry with 19200 baud – Real-time queries of forward power (±1dB accuracy over >20dB range), temperature (±3°C from -25°C to +85°C), and alarm status (over-power at +2dB threshold, over-temperature with 85°C shutdown / 65°C auto-recovery).
Integrated ATT & ALC with fault reporting – Downlink gain adjustment ≥25dB and ALC range ≥10dB with gain flatness ≤±1.5dB across attenuation steps, plus active reporting for VSWR, power, and temperature anomalies.
Technical Specification:
Product Name:
1. UZI-TDD-B34-2.0G-25W-139-28V
2. UZI-TDD-B39-1.9G-25W-139-28V
3. UZI-TDD-B40-2.3G-25W-139-28V
Items: | Uplink (UL) & Downlink (UL) Specifications: |
Frequency Range: | 1. B34: a. UL:2010MHz -2025MHz b. DL:2010MHz -2025MHz 2. B39 a. UL:1880MHz -1920MHz b. DL:1880MHz -1920MHz 3. B40 a. UL:2300MHz -2400MHz b. DL:2300MHz -2400MHz |
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: | B40: ≤2.5dB; Others: ≤2dB |
Noise Figure: | 1. UL:≤3dB 2. DL:NONE |
Tx-Rx Isolation: | ≥55dBc |
EVM: | ≤5% (Peak-to-Average Power Ratio 10.0dB) |
VSWR: | ≤1.4 (Test condition: power on for testing after turning off the downlink power amplifier.) |
Operating Voltage: | 28V |
Operating Current: | With pre-distortion: ≤2.5A |
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; |
Dimensional Drawing:
1.RX:LNA (uplink) switch, CMOS 3.3V high level turns it on, low level turns it off.
2.TX:PA (downlink) switch, CMOS 3.3V high level turns it on, low level turns it off.
Sample:
