## Retrieving data using the ArchiveViewer

The EPICS Archiver Appliance comes with a client plugin for the
ArchiveViewer that enables the user to retrieve and display data in the
ArchiveViewer using the [PB/HTTP](../developer/pb_pbraw) protocol. To download a
version of the Archive Viewer with the client plugin for the EPICS
Archiver Appliance, please see the
[Download](https://github.com/slacmshankar/epicsarchiverap/releases/)\'s
section.

To retrieve data, start the Archive Viewer and connect to the EPICS
Archiver Appliance using a URL that looks like so
`pbraw://archiver.slac.stanford.edu/retrieval`. This URL is generated by
replacing the string _http_ with the string _pbraw_ in the
`data_retrieval_url` element of your `appliances.xml`.

![Connecting using pbraw](../../images/av_connect.png)

Once you have established a connection to the server, you should be able
to use the Archive Viewer as before to retrieve and display data.

![Plotting](../../images/av_plot.png)

The Archive Viewer is also used to retrieve data from the Channel
Archiver; this has a concept of indexes that form part of the data
retrieval request. There is no equivalent concept in the EPICS Archiver
Appliance; so we have a dummy client-side only entry called _Default_
that is used.