© Copyright 2013 Zephyr Engineering, Inc
UDPSDR-
HF2 User’s Manual
17
Version 3.5
– 3 October 2013
buttons above the date display. HDSDR saves the setting of
Mute
from run to run, so if
you had the receiver muted when you shut HDSDR down, it will still be muted when you
launch HDSDR again.
3.5.1.1.2
Bandwidth Selection
The SDRstick
TM
firmware gives you two options for input sampling rate: 1.92Msps and
384Ksps. To change the input sampling rate, click the
Bandwidth [F6]
button. At the
bottom of the left column, you will see a dialog box. Click on the small down-arrow and
you will be presented with two selections, “384000” (384Ksps) and “1920000”
(1.92Msps).
There are two reasons that you might want to select the lower sampling rate. The lower
sampling rate requires less CPU resources, so you might want to choose a lower rate if
you PC is slower or older. Another reason to choose a lower sampling rate is to reduce
the network load. The 1.92Msps sample rate will consume almost 80% of the entire
100Mbps network bandwidth, or about 77Mbps. This will not work over a WiFi
connection unless you reduce the sample rate. At 384Ksps, the data rate is about
15Mbps, which may be transportable over most 802.11g or 802.11n WiFi networks, but
not over 802.11b networks.
3.5.1.1.3
Front End Attenuator
The 31-dB front-end step attenuator is controlled by the
RF+0
button in the upper right
of the cluster of blue button located above the date display. Click on this button and a
slider will pop up next to the
RF+0
button. As you move the slider down, notice that the
number changes to
RF-1
,
RF-2
, etc. The number displayed within the button is the
attenuation selected.
3.5.2 SDR#
SDR#
(read SDR Sharp) is a high performance SDR application for Windows written in
C#. It is a fully featured SDR, and is available for download here:
<
http://sdrsharp.com/
>
The SDR# download is a zip archive, rather than an executable installer for Windows.
Simply download it to a directory on your local drive and unzip the files.
After you have unzipped the files, you must place a copy of ExtIO_SDRSTICK.dll in the
same directory. The latest version of this file can be found on the web at
<svn.sdrstick.com> in the <sdrstick-release/software> directory.
If you have followed the above steps, when you run SDR#, an SDRstick
TM
network
discovery dialog box will pop up showing the IP address of the SDRstick
TM
receiver that
SDR# found on the network. Click
OK
, and the SDR# main screen appears. Simply
click the
Play
button and you are on the air!
