SB7 (formerly sb3.orbit) is a two-node ORBIT sandbox at WINLAB (Route 1, North Brunswick, NJ) built around USRP N210 radios with SBX v3 daughterboards — gigabit-ethernet SDRs covering 400–4400 MHz. Two nodes: node1-1.sb7.cosmos-lab.org, node1-2.sb7.cosmos-lab.org.
SB7 is the right sandbox for network-attached-USRP work in the sub-4.4 GHz range and for sanity-testing OMF/disk-image workflows. For X310-class SDR work prefer SB6; for USB B210s prefer SB5.
| Component | Value |
|---|---|
| Mainboard | "Los Lunas 2" (LV-67C class) |
| CPU | Intel Core i7-2600 @ 3.40 GHz (4 cores / 8 threads) |
| RAM | 8 GB |
| Disk | EDGE Boost Pro S (~55 GB SSD) |
| WiFi | Qualcomm Atheros AR928X (PCIe) |
| SDR | 1× USRP N210 + SBX v3 (400–4400 MHz), dedicated gigabit NIC |
SB7 nodes are the oldest active generation in the sandbox fleet — i7-2600 (Sandy Bridge) on the smaller-form-factor LV-67C class board. Storage and RAM are correspondingly modest.
Each node has three ethernet interfaces; the third (enp4s0) is dedicated to its N210. The radio answers at 192.168.10.2 with the host side in 192.168.10.0/24. UHD identifies N210s as device type usrp2 (the N2xx series shares the USRP2 protocol) — so uhd_find_devices reporting type=usrp2 on SB7 is normal and does not mean the old USRP2 hardware.
uhd_find_devices --args="addr=192.168.10.2"
The two N210s are connected via coax with a protective attenuator on each link (same pattern as the other SDR sandboxes). With SBX v3 boards, anything from 400 MHz to 4.4 GHz works — including the FM band, making SB7 suitable for broadcast-style tutorials that fit in that range.
| If your experiment needs… | Use SB7 |
|---|---|
| Network-attached USRP (gigE), 400–4400 MHz | ✓ |
| Atheros WiFi experiments | ✓ |
| A "spare" sandbox when SB5 and SB6 are busy | ✓ |
| Newer SDR (B210, X310) | use SB5 or SB6 |
| Tightly-controlled RF attenuation | use SB4 |
| GPU / FPGA wired-only experiments | use SB9 |
omf tell on -t all
omf load -i baseline-sdr.ndz -t all
omf stat -t all
omf tell offh -t all
See Getting Started for the full walkthrough.