software-controlled RF digital step attenuators
(Downloads: Data Sheet, Manual)
The sysmoRFDSATT family is a product family of digitally controlled / programmable RF step attenuators. The initial product within this family is the sysmoRFDSATT-4-62 with:
4 independent RF channels
0 .. 62 dB nominal attenuation per channel.
This kind of device can be very useful in any kind of laboratory or test setup where RF signal strength must be adjusted programmatically. A classic use case is e.g. the testing of power-based hand-over within lab setups of cellular radio network, such as GSM BTS, UMTS NodeB, LTE eNodeB or 5G gNodeB.
Form-Factors
The sysmoRFDSATT-4-62 is available in three variants:
PCBA only, for integration into custom projects
3U Component Carrier
Desktop Enclosure
Software Integration
The full firmware stack, from boot loader up to the application firmware is Open Source Software. This means any user can be modified to accommodate any specific requirements.
For example, the following modifications are easily possible:
support of the SCPI protocol for integration into existing lab software solutions
support of any application-specific control protocol
support of autonomous execution of entire scenarios, like ramping attenuation with certain slope
Technical Data
Mechanical / Electrical Specification
Desktop Enclosure |
3U Component Carrier |
|
|---|---|---|
Dimensions (W x H x D) |
105 x 44 x 104 mm (excl. SMA) 105 x 44 x 113.5 mm (incl. SMA) |
35.3 x 128.2 x 82.5 mm (excl. SMA) 35.3 x 128.2 x 92 mm (incl. SMA) |
Mounting |
None |
7 HP wide 3U module IEC 60297-3-101 |
Maximum RF Power |
+24 dBm >= 50MHz; +11 dBm >= 1 MHz |
|
Absolute maximum RF power |
+30 dBm |
|
Attenuation Range (nominal) |
0 .. 62 dB per channel; step size 1 dB |
|
Insertion Loss (typical) |
3.5 dB @ 1 GHz; 5.4 dB @ 2 GHz, 6 dB @ 3 GHz |
|
UART Connector |
3.3V UART on 2.5mm stereo jack, front-facing; 115200 bps |
|
RF Connectors |
8 x SMA, female, front-facing |
|
Input Voltage |
5V DC via 5.5/2.5mm barrel connector |
barrel connector (see left) or 2.54mm pitch header |
Software / Logical Specification
Firmware |
|
UART Protocol / Interface |
|
Firmware Upgrade |
|
Block Diagram
