- 1x BT-100 Bias-tee Power Amplified
- bladeRF xA4 & bladeRF xA9
- Micro Enclosure
- External Power Supply (recommended)
- Frequently Asked Questions
- Features Mini-Circuits PHA-1H+ MMIC Amplifier – 50MHz to 6GHz MMIC
- Power consumption: 200mW
- Blue LED power indicator
- Typ Gain: +15.6db @ 200MHz, +10.7dB @ 2.4GHz
- Low TX Noise Figure
- High output IP3 point
- Enable module:
set biastee tx on
- Disable module:
set biastee tx off
- Query system power consumption:
The BT-100 is a wideband bias tee TX Power Amplifier (PA) that draws its current from the bladeRF 2.0 micro’s SMA connectors. The BT-100 is versatile PA that is an ideal intermediary or final stage amplifier in a TX chain. bladeRF-cli and the libbladeRF API can be used to enable and disable the bias-tee when it is needed. Care should be taken to avoid overdrawing current when powering the bladeRF 2.0 micro from USB bus power and enabling multiple bias-tee amplifiers simultaneously. In case the power budget (
print hardware in bladeRF-cli) is a concern, the bladeRF 2.0 micro can be powered by an external DC power supply.
The BT-100 is backwards compatible with the bladeRF 1.0 and other transceivers. However, J3 must be populated and FB1 may need to be removed to prevent back-feeding DC voltage into ESD diodes and other sensitive circuitry that may exist and cause damage. Check the SDR’s schematic to determine the necessary precautions. Connect a +5VDC supply to J3.1 and ground to J3.2. Refer to the schematic for details.
NOTE: The BT-100 can only be plugged into the TX ports.
Frequently Asked Questions:
How can I tell if the PA is enabled?
A green light will appear on the BT-100 if the program or tool you are using enables the bias-tee. In addition to the command line commands listed above, add “biastee=tx” to gr-osmosdr sink blocks to enable BT-100 from within GNU Radio.
How many BT modules can be added to the bladeRF 2.0 micro?
All 4 ports of the bladeRF 2.0 micro are powered, so any and all RF ports can have a bias-tee module installed and powered.