horusdemodlib/user.env.example

### General SDR settings ###

# Receiver Gain. Set this to 0 to use automatic gain control, otherwise if running a
# preamplifier, you may want to experiment with different gain settings to optimize
# your receiver setup.
# You can find what gain range is valid for your RTLSDR by running: rtl_test
GAIN=0

# Bias Tee Enable (1) or Disable (0)
BIAS=0

# Receiver PPM offset
PPM=0

# Enable (1) or disable (0) modem statistics output.
# If enabled, modem statistics are written to stats.txt, and can be observed
# during decoding by running: tail -f stats.txt | python fskstats.py
STATS_OUTPUT=0

# Select decoder to tun
DECODER=horus_demod

# For use with SoapySDR via rx_tools
#SDR_EXTRA="-d driver=rtlsdr"

##########################################################
### NOTE: Only uncomment one of the settings sections! ###
##########################################################

### Single 4FSK settings ###

# Script name
DEMODSCRIPT="docker_single.sh"

# Receive *centre* frequency, in Hz
# Note: The SDR will be tuned to RXBANDWIDTH/2 below this frequency.
RXFREQ=434200000

# Frequency estimator bandwidth. The wider the bandwidth, the more drift and frequency error the modem can tolerate,
# but the higher the chance that the modem will lock on to a strong spurious signal.
# Note: The SDR will be tuned to RXFREQ-RXBANDWIDTH/2, and the estimator set to look at 0-RXBANDWIDTH Hz.
RXBANDWIDTH=10000



### Dual 4FSK settings ###

# Script name
#DEMODSCRIPT="docker_dual_4fsk.sh"

# Receive requency, in Hz. This is the frequency the SDR is tuned to.
#RXFREQ=434195000

# Frequency estimator bandwidth. The wider the bandwidth, the more drift and frequency error the modem can tolerate,
# but the higher the chance that the modem will lock on to a strong spurious signal.
#RXBANDWIDTH=5000

# Where in the passband we expect to find the Lower Horus Binary (MFSK) signal, in Hz.
# For this example, this is on 434.290 MHz, so with a SDR frequency of 434.195 MHz,
# we expect to find the signal at approx +5 kHz.
# Note that the signal must be located ABOVE the centre frequency of the receiver.
#MFSK1_SIGNAL=5000

# Where in the receiver passband we expect to find the higher Horus Binary (MFSK) signal, in Hz.
# In this example, our second frequency is at 434.210 MHz, so with a SDR frequency of 434.195 MHz,
# we expect to find the signal at approx +15 kHz.
#MFSK2_SIGNAL=15000



## Dual RTTY 4FSK settings ###

# Script name
#DEMODSCRIPT="docker_dual_rtty_4fsk.sh"

# Receive requency, in Hz. This is the frequency the SDR is tuned to.
#RXFREQ=434645000

# Frequency estimator bandwidth. The wider the bandwidth, the more drift and frequency error the modem can tolerate,
# but the higher the chance that the modem will lock on to a strong spurious signal.
#RXBANDWIDTH=8000

# Where in the passband we expect to find the RTTY signal, in Hz.
# For Horus flights, this is on 434.650 MHz, so with a SDR frequency of 434.645 MHz,
# we expect to find the RTTY signal at approx +5 kHz.
# Note that the signal must be located ABOVE the centre frequency of the receiver.
#RTTY_SIGNAL=5000

# Where in the receiver passband we expect to find the Horus Binary (MFSK) signal, in Hz.
# For Horus flights, this is on 434.660 MHz, so with a SDR frequency of 434.645 MHz,
# we expect to find the RTTY signal at approx +15 kHz.
#MFSK_SIGNAL=15000