---
name: "tags_demo"
section: "1"
platform: "linux"
package: "gnuradio"
version: "3.10.12.0-18"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/tags_demo"
---

# tags\_demo(1)

GNURadio and UHD tags example

## NAME

tags\_demo - GNURadio and UHD tags example

## DESCRIPTION

Show source timestamps and demonstrate timed bursts on a sink.

## OPTIONS

- **-h**, **--help**

  show this help message and exit

- **--addr**

  the device address in string format

- **--rate**

  the sample rate in samples per second (default=1000000)

- **--freq**

  the center frequency in Hz (defaualt=1000000)

- **--burst**

  the duration of each burst in seconds (defaualt=0.10000000000000001)

- **--idle**

  idle time between bursts in seconds (defaualt=0.050000000000000003)

The tags sink demo block will print USRP source time stamps. The tags source demo block will send bursts to the USRP sink. Look at the USRP output on a scope to see the timed bursts.

## SEE ALSO

The c++ gnuradio example programs are in /usr/bin. There are also many Python and GnuRadio Companion examples in /usr/share/gnuradio/examples/...

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