
I. Record I/Q data on SD card, playback with SDR# software
Instructions:
• Insert the SD card into the receiver
• MENU
•
CONF + ENT
•
① In SOURCE, select IQ FILE
② Click that wheel shaped button and select your
IQ recording file inside the SD card
③ Click the play button to start playback
SAVE TYPE + ENT
• Select IQ by rotating the dial selector + ENT
• Press ● to start recording
• Press ● to stop recording
• Insert the SD card into your PCs SD card reader
• Download the SDR# software at https://airspy.com/download (select the WINDOWS SDR SOFTWARE
PACKAGE.
• Extract the zip file to the PC folder of your choice. (No driver installation is required)
• To start the SDR# software, double click the file SDRSharp.exe
②
③
File format:
30 kHz bandwidth (+/-15kHz), 38.4kS, 16 bit
The I/Q files will be saved in this file format: q-------.wav
Long recordings will automatically be split in chunks of 100MB (approx. 10 min.)
Hint:
To have SDR# display the correct center frequency,
Instead of 000.000, it is advised to rename your IQ
recording file to the following format: ------khz.wav
------ is the frequency in kHz, for example:
128800kHz.wav for 128.8MHz
①

II. Discriminator audio recording
• Insert the SD card into the receiver
• MENU
CONF + ENT
SAVE TYPE + ENT
• Select DISC + ENT
• Press ● to start recording
• Press ● to stop recording
The discriminator audio files will be saved in this file format: d-------.wav
Discriminator audio is an unfiltered signal, also called baseband audio. It is required by some PC applications
decoding data signals such as CTCSS, SCA, FSK, RTTY, FAX, Pager data, and trunked system control data, etc. For
details we invite you to ask Google.
III. Manual XTAL offset
(For advanced users only. Do not change unless you know exactly what you are doing.)
This setting allows manual adjustment of the receive frequency accuracy, in addition to the automatic temperature
dependant drift compensation.
The offset value is a relative value, it does not correspond to ppm.
• MENU
CONF + ENT
XTAL OFFSET + ENT
• Rotate the dial selector knob until reaching the desired value (between -9990 and + 9990)
• ENT
User manual addendum:
Chapter 4. ANTENNA
The rubber antenna has been fine tuned for AIRBAND. For other bands, use the supplied telescopic antenna for
optimum performance. For 400MHz, reduce the antenna length to minimum (1 segment) for optimal signal to noise
ratio.
Receiver specifications erratum:
Page 59:
Frequency stability ±5ppm (+14°Fto +122°F [-10°C to +50°C])
Considering the significant excursion of longer wavelengths, below 25 MHz, it may be possible to notice a
degradation of the frequency stability over the “+/- 5ppm” parameter.
↓
10/05/2018