The following paragraphs describe each remote control command parameter setting, grouped by category of usage.
State and measurement values (read-only)
| levl | (Receive level, dBm) This is the measured signal level at the receiver's L-band input. |
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| adcv | (Analog output voltage, V) This value shows the voltage the receiver actually outputs at it's analog output port. Please note that the reading shown here is not calibrated to match the true output voltage exactly. |
| temp | (Board temperature, °C) The temperature shown is the temperature measured on the beacon receiver printed circuit board. The temperature at this place normally is about 20°C above the environment temperature, hence temperature readings at 65°C are not unusual. |
| lbfr | (L-Band Frequency, MHz) Querying this parameter returns the L-Band frequency the receiver is tuned to. |
| tflt | (Receive Level Fault, OK/FAULT) If the receive level falls below the alarm threshold which can be set with the thrh parameter, the receiver responds 'FAULT' or 'OK' if if the level is above the threshold. |
| sflt | (Synthesiser Lock Fault, OK/FAULT) If one of the PLL synthesisers in the receiver does not lock, this parameter reads 'FAULT'. This happens if you tune the frequency out of it's valid range. |
| dflt | (D/C Supply Fault, OK/FAULT) The receiver monitors it's internal supply voltages. If one of them is out of range, 'FAULT' is reported when querying this parameter. |
| adcv | (Raw ADC Level, decimal 0..65535) Reading this parameter returns the raw A/D converter reading with no calibration or filtering applied. |
Measurement settings
| freq | (RF receive frequency, MHz) This parameter controls the receiver's receive frequency. Depending on the LO frequency settings made with the lof1 , lof2 and edge parameters, the frequency value either is expressed as the RF receiver frequency or the L-band frequency at the receiver's input. If the '22 kHz Tone' parameter ( ln22 ) is configured as 'AUTO', changing the frequency also will switch the 22kHz modulation on the LNB power supply on or off, according to the band of the frequency setting |
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| rxpl | (Receive polarisation, H/V) If the 'LNB voltage' parameter ( lnbv ) is set to 'AUTO', the receive polarisation may be set with this parameter. If lnbv is not set to 'AUTO', changing the rxpl parameter has no effect. |
| attn | (Input attenuation, 0/10/20/30) The receiver provides a switchable input attenuator which lets you adjust the input level in 10 dB steps. This is specially useful with large Antennas pointing to a satellite which generates a high flux density. With the attenuator you may adjust the input level in order to avoid saturation effects in the receiver. All input attenuator steps are calibrated, the attenuation values are taken into account for the displayed receive level. Available attenuator settings are 0, 10, 20 and 30 dB. |
| msbw | (Measurement bandwidth, 6/12/30/100) The receiver provides four different measurement bandwidth filters (6, 12, 30 and 100 kHz). The 30 kHz filter is suitable for majority of cases. |
| fltr | (Post detector filter, 0/0.1/0.5/1/5/10/50/100 The receiver's software applies a low pass filter to the measured level values. This is much like the video filter at a spectrum analyser. Available bandwidth settings for this filter are 100 Hz to 0.1 Hz in 1/5 steps. Lower bandwidth settings make the reading more stable, reduce the fluctuation. Please keep in mind, it will take a noticeable time until the level reading settles after an input level change with a very low bandwidth setting. Setting fltr=0 disables the low pass filter completely. |
| scmp | (Spectrum compensation, dB) With this parameter set to 0.0, the receiver's level reading is calibrated for a C/W signal. With this parameter you can set an offset (range -10.0 .. +10.0 dB) which is added to the measurement reading in order to compensate for differences arising from the received signal's spectrum shape. The spectrum compensation offset applies to the value of the levl parameter and to level sent through the RS422 streaming output as well. |
| thrh | (Fault threshold, dBm With this parameter you set the level fault threshold. If the measured level falls below this value, the receiver states a receive level fault. To disable the level fault, set the threshold to a very low value, e.g. -199 dBm. |
Analog output configuration
| dacs | (Analog output scale) This parameter defines the slope of the receiver's voltage output in V/dB. The output voltage has a range of 0 .. 10 V. Setting this parameter to 0.25V/dB lets the analog output cover a dynamic range of 40 dB. The scale value may be negative, which lets the output voltage fall for rising input level values. |
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| daco | (Analog output offset) This parameter defines, which input level gives 0V output. Example: setting dacs=0.25 and daco=-90 programs the analog output to read 0V at -90 dBm beacon level and +10V at -50 dBm. |
LNB configuration
lnbv --- (LNB voltage, OFF/14V/18V/AUTO) This parameter controls the LNB supply voltage provided by the receiver at it's input connector. The following settings are available:
ln22 --- (22KHz tone, OFF/ON/AUTO) This parameter controls the presence of a 22 kHz tone on the LNB supply voltage. The following settings are available:
lof1 --- (Low band LO frequency, MHz) This parameter sets the conversion (LO) frequency frequency for the lower frequency band LNC. Common values for this frequency are 10000 MHz or 9750 MHz for consumer antennas. Set this value to zero if you intend to set the receive frequency in terms of L-band frequency. If the LO is above above the receive frequency (e.g. for a C-Band application) enter the LO frequency as a negative value.
lof2 --- (High band LO frequency, MHz) This parameter sets the conversion (LO) frequency frequency for the upper frequency band LNC. Common values for this frequency are 11300 MHz or 10600 MHz for consumer antennas. Set this value to zero if you intend to set the receive frequency in terms of L-band frequency. Normally the receiver assumes, that the LO is below the RF receive frequency as this is common for Ku-band LNCs. If the LO is above above the receive frequency (e.g. for a C-Band application) enter the LO frequency as a negative value.
edge --- (Band edge, MHz) This parameter defines the frequency threshold where to switch between the frequency bands.
Miscellaneous (read-only)
| srno | (Serial number) Querying this parameter returns the serial number of this device. |
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| sver | (Software version) Querying this parameter returns the software version installed. |