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Summary of Contents for Winradio G3 series
- Page 1 FCC ID: HNL-G5P Report No. M060139_Cert_G3_Internal_Receiver EMC Technologies Report Number: M060139_Cert_G3_Internal_Receiver APPENDIX G User Manual EMC Technologies Pty Ltd – 57 Assembly Drive, Tullamarine VIC 3043 Australia www.emctech.com.au...
- Page 2 ® WiNRADiO G3xx VHF/UHF Receiver User’s Guide...
- Page 3 WiNRADiO, G3 and Radio Basic are trademarks of WiNRADiO Communications All other brand and product names are trademarks of their respective owners. Patents WiNRADiO technology is protected by US Pat. No. 6,289,207 and other pending US and international patent applications. Printed in Australia...
- Page 4 WiNRADiO receiver, whether arising out of contract, negligence, tort or under any warranty, even if WiNRADiO Communications has been advised of the possibility of such damages.
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Page 5: Table Of Contents
WiNRADiO G3XX VHF/UHF Receiver Table of Contents Table of Contents ..................4 Introduction....................6 G3XX Receiver Models................7 Installation....................9 System Requirements................9 Hardware Installation ................. 10 Software Installation................11 Setting up the Sound Card..............12 Connecting the Antenna ..............13 Getting Started.................. - Page 6 WiNRADiO G3XX User’s Manual Squelch Control ..................44 Memory ....................46 Storing a Frequency into Memory ............46 Recalling a Frequency from Memory..........48 Editing Memory .................. 49 Deleting a Frequency ................. 49 Saving a Memory File................. 50 Opening a Memory File ..............50 Memory Stepping ................
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Page 7: Introduction
The WiNRADiO G3XX is not designed to be an ordinary radio receiver. It is intended to be an exemplary radio communications instrument, crafted with meticulous care and dedication to excellence. -
Page 8: G3Xx Receiver Models
WiNRADiO G3XX User’s Manual G3XX Receiver Models There are two basic models of the WiNRADiO G3XX receiver: • G3XXi (PCI card based “internal” model) • G3XXe (USB based “external” model) Both receivers have similar parameters and similar software user interface. - Page 9 The power jack accepts 12 V DC (the power adapter must be rated for minimum 500 mA). To minimize interference, a linear-mode power adapter is recommended (as supplied by WiNRADiO). The antenna input is an SMA-type connector with 50 ohm impedance.
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Page 10: Installation
• Audio cable (G3XXi receiver only) • This User’s Guide • Warranty information In order for the WiNRADiO receiver to function, your IBM PC compatible computer must meet the minimum system requirements specified below. System Requirements Minimum Recommended 500 MHz,... -
Page 11: Hardware Installation
WiNRADiO G3XX VHF/UHF Receiver Hardware Installation G3XXi model (PCI card) 1. Turn the computer off and disconnect the power cord. 2. Remove the computer case. Choose an empty PCI slot, as far as possible from the power supply and from other cards. -
Page 12: Software Installation
3. This will run the application installer, which will guide you in the installation process. 4. After all the files have been installed to your hard disk, run the WiNRADiO G3XX application. Note: If the receiver is not detected by Windows, you can simply skip the driver installation procedure, insert the CD ROM, and run the installation program, which will also install the drivers. -
Page 13: Setting Up The Sound Card
WiNRADiO G3XX VHF/UHF Receiver Setting up the Sound Card The G3XXe receiver’s audio travels via the USB interface in a digitized form, to be played back by the sound card. The volume can be adjusted using the Wave volume slider (which must be unmuted) or the master Volume Control. -
Page 14: Connecting The Antenna
The same applies to a WiNRADiO receiver. To make the most of your G3XX receiver, you should install a proper antenna. WiNRADiO may also be able to assist with our wide range of suitable antennas – check our Web page www.winradio.com. -
Page 15: Getting Started
Detailed operation is described in the subsequent chapters. We hope you will return to these chapters, as the WiNRADiO G3XX receiver has many fine features which would be a shame to miss. Start the WiNRADiO G3XX receiver application (by double clicking on the WiNRADiO icon). - Page 16 If you are unable to tune to any stations at this point, please refer to Appendix A - Troubleshooting. There are many other ways to tune the WiNRADiO receiver other than typing the frequency or using the tuning knob. These will...
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Page 17: Tuning Winradio G3Xx
WiNRADiO G3XX VHF/UHF Receiver Tuning WiNRADiO G3XX Manual Frequency Entry To change frequency, simply type the new frequency into the keyboard. As soon as you press a number or decimal point, the frequency display will activate, waiting for a frequency to be typed. You can also click on the display to type in a new frequency in a highlighted field. - Page 18 It is also possible to change the naming and frequency allocations for entire frequency bands. This can be done by editing the file called bands.csv in the WiNRADiO installation folder. (This is a standard “comma-separated-value” format file which can be edited using a spreadsheet application, such as Microsoft Excel.)
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Page 19: Tuning Knob
WiNRADiO G3XX VHF/UHF Receiver Tuning Knob The Tuning Knob makes it possible to adjust the frequency in fixed 50 Hz, 500 Hz, 5 kHz or 50 kHz steps. To use the tuning knob, position the mouse cursor over the knob (the cursor will turn into a curved double ended arrow) and click on either the left or right mouse button. -
Page 20: Incremental Tuning Pad
WiNRADiO G3XX User’s Manual Incremental Tuning Pad This unique tuning tool is located above the Tuning Knob. If the mouse is positioned above one of the coloured squares, the square lights up and the associated tuning increment value appears: Clicking on the square with the left mouse button results in increasing the frequency, clicking with the right mouse button will decrease the frequency. -
Page 21: Afc (Automatic Frequency Control)
WiNRADiO G3XX VHF/UHF Receiver AFC (Automatic Frequency Control) The Automatic Frequency Control function is activated by pressing the AFC button. It will keep the receiver tuned to the selected station if the transmitter frequency drifts. While this function is active, the receiver will periodically check the received signal and correct the frequency in approximately five-second intervals. - Page 22 WiNRADiO G3XX User’s Manual This type of fixed-size stepping is convenient if you wish to explore a frequency band where the channels are equally separated. However, you should ensure that the stepping frequencies fall on the actual channel frequencies in the band. If you know the channel separation but are unsure about the exact frequency of the first channel, tune to an active channel using manual tuning first, and only then step up or down in fixed steps.
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Page 23: The Demodulator
Demodulator Panel. This panel is in fact a separate plug-in to the main receiver panel, and can be replaced by other demodulators, either developed by WiNRADiO or third parties. Selecting Demodulation Mode To select the demodulation mode, click the appropriate mode button in the... -
Page 24: Real-Time Spectrum Scope
WiNRADiO G3XX User’s Manual In addition to the usual and self-explanatory AM, LSB, USB, CW and FM modes, there is also AMS (synchronous AM), DSB (dual sideband, suppressed carrier) and ISB (independent sideband). For ISB, the audio output can be selected between the lower and upper side... - Page 25 WiNRADiO G3XX VHF/UHF Receiver Spectrum trace without video filter The same signal with video filter set at 3300 Hz...
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Page 26: Setting And Adjusting If Bandwidth
WiNRADiO G3XX User’s Manual The zoom in and out buttons change the displayed signal bandwidth in 2 kHz steps, while trying to keep the central red marker as close as possible to the center of the spectrum display. Using the zoom buttons, the displayed bandwidth can be changed from the default 20 kHz down to 4 kHz, making it possible to observe small details of the received spectra less than 20 Hz apart. - Page 27 WiNRADiO G3XX VHF/UHF Receiver There are three ways you can use this control: • Type the IF bandwidth directly into the edit box, in Hz (type in a number from 1 to 15000, followed by pressing Enter). • Use the small up/down cursor keys to adjust the frequency by 1 Hz steps.
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Page 28: If Shift And Passband Tuning
WiNRADiO G3XX User’s Manual IF Shift and Passband Tuning Dragging the centre red line of the filter passband does not result in the bandwidth change, but rather moves the entire passband. Such IF Shift makes it possible to tune the receiver to where the actual signal is, by positioning the IF filter passband precisely over the real-time signal spectrum. -
Page 29: Volume Control
WiNRADiO G3XX VHF/UHF Receiver To summarize, there are two ways to shift the real-time spectrum: 1. IF Shift (without BFO change) which makes it possible to tune the receiver to another frequency by dragging the entire filter passband over a peak of a visible signal. -
Page 30: Software Agc
WiNRADiO G3XX User’s Manual Software AGC In addition to the usual hardware AGC (Automatic Gain Control), the G3XX receiver also has Software AGC. This facility is used to compensate for audio volume changes when the antenna signals are so weak that the hardware AGC is not yet activated, or when the hardware AGC is disabled and manual IF gain setting is used instead. -
Page 31: Af Squelch (Audio Filter Squelch)
WiNRADiO G3XX VHF/UHF Receiver The higher the AGC reference level, the louder the maximum audio volume (which can be then reduced by the volume control). However, with a high level and strong signal levels there will be a distortion. Decreasing the AGC reference level will result in lower audio levels. -
Page 32: Notch Filter
(including auto-notch) in the optional Advanced Digital Suite plug-in, available for the G3XX receiver. This also features numerous user-adjustable audio filters and various other signal conditioning, noise-reduction, decoding and analysis facilities. See www.winradio.com/ads for more details. - Page 33 WiNRADiO G3XX VHF/UHF Receiver The following picture shows a signal with a strong interference in the passband (the large peak right of center). In the resulting audio, typically there would be a strong buzzing sound. After engaging the notch filter and adjusting its center and bandwidth (by dragging...
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Page 34: Audio Filter
WiNRADiO G3XX User’s Manual Audio Filter The Audio filter makes it possible to apply filtering to the demodulated audio. This is useful in particular for noisy signals, where intelligibility is improved by emphasizing particular frequencies (usually speech frequencies 300-3000 Hz). -
Page 35: Noise Blanker
WiNRADiO G3XX VHF/UHF Receiver The Band-pass and Low-pass buttons make it possible to select the desired type of filter. The filter cut-off frequencies can be either entered numerically, or the filter edges can be dragged with the mouse. For the band-pass filter, the entire passband may be shifted left or right by dragging the top horizontal red line. -
Page 36: Recording And Playback
WiNRADiO G3XX User’s Manual To set up RIT, firstly tune the receiver precisely to one of the stations, until you have perfect sound. Then press the RIT button and adjust the RIT frequency increment (it is shown in Hz) to hear the second station clearly. You can either... - Page 37 WiNRADiO G3XX VHF/UHF Receiver The recorder uses fixed “wav” file formats: 1. For audio recording (except in ISB mode): 16 kHz sampling rate, 16-bit mono 2. For audio recording in the ISB mode: 16 kHz sampling rate, 16-bit stereo 3. For IF recording: 64 kHz sampling rate, 16-bit, mono...
- Page 38 WiNRADiO G3XX User’s Manual Auto-increment file name - each time the record button is pressed, a number just before the “.wav” extension, and “.if” for IF files, is incremented; if there is no initial number, 1 is automatically used first.
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Page 39: Test And Measurement
WiNRADiO G3XX VHF/UHF Receiver Test and Measurement The Test and Measurement function of the G3XX receiver is invoked by pressing the Test button: This causes an instrumentation window to open which contains several facilities to assist with analysis and measurement of the received signal:... - Page 40 WiNRADiO G3XX User’s Manual The red marker can be dragged with the mouse and the associated frequency and level observed at the top of the marker. To zoom the spectrum graph in and out, use the zoom buttons on the left of the Help button.
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Page 41: Demodulator Structure
This function is intended for users wishing to acquaint themselves more deeply with Software Defined Radio principles. It is described in greater detail in Appendix E – Inside G3XX Demodulator. Did you know? The award-winning WiNRADiO G303i receiver was the world’s first software- defined commercially available receiver. -
Page 42: Other Demodulator Settings
The IF samples are passed at 48 kHz sampling rate, two channels. Audio samples are passed at 16 kHz, one channel. The Secondary output can be used to advantage by the optional WiNRADiO Virtual Sound Card software, which makes it possible to pass the digitized... -
Page 43: Receiver Gain Control
WiNRADiO G3XX VHF/UHF Receiver Receiver Gain Control There are three hardware controls related to the receiver gain: AGC, Manual IF Gain and Attenuator. The receiver must process a considerable variation of signals, ranging from very weak to very strong. This requires the sensitivity of the receiver to vary according to the incoming signal strength. -
Page 44: If Gain Control
WiNRADiO G3XX User’s Manual IF Gain Control The AGC can be turned off using the AGC Off button. The receiver gain must then be adjusted manually. This is done using the IF Gain control. Note that by setting an excessive gain, the receiver will overload and the demodulated signal will be distorted, which can be very easily observed in the real-time spectrum scope. -
Page 45: Squelch Control
WiNRADiO G3XX VHF/UHF Receiver Squelch Control The Squelch control can be used to mute the receiver when no signal is being received. Without a signal, all you will usually hear is noise. Squelch is provided to cut out the noise until a station is found, making the receiver more comfortable to use. - Page 46 (no sound from the speaker), check the squelch and mute settings first. Did you know? Squelch can be also controlled by the signal contents. For example, the CTCSS (Continuous Tone Coded Squelch System) is also supported by the optional WiNRADiO Advanced Digital Suite (see www.winradio.com/ads).
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Page 47: Memory
WiNRADiO G3XX VHF/UHF Receiver Memory The WiNRADiO G3XX receiver has the ability to store up to ten thousand frequencies in one memory file. It makes it possible to load and save different memory files for a huge amount of total storage, limited only by the size of the PCs hard disk. - Page 48 WiNRADiO G3XX User’s Manual At the top of the dialog box is the current memory file name into which you are storing (you can have as many different files as you like). The next line shows the allocated memory number. You can change this to another memory number if you wish (including one which is already allocated).
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Page 49: Recalling A Frequency From Memory
WiNRADiO G3XX VHF/UHF Receiver There are also several additional items that can be optionally stored with each frequency: • Most stations have a name or call sign. You can store up to 11 characters in the Call sign field. •... -
Page 50: Editing Memory
WiNRADiO G3XX User’s Manual To select a frequency, click on an item in the list, and the frequency will be tuned. Then close the window. Alternatively, use the up or down cursor keys to choose the frequency and press Enter. -
Page 51: Saving A Memory File
File menu. If you wish to save it with a different name, select Save as instead, and a dialog box will pop up allowing you to specify the file name. When you exit the WiNRADiO G3XX application, all memory changes are automatically saved; there is no need to use the Save command before exit. -
Page 52: Scanning
WiNRADiO G3XX User’s Manual Scanning The WiNRADiO G3XX application contains a comprehensive set of scan functions to enable the user to search for stations which are currently on the air. There are three basic types of scanning: Immediate Scanning (Searching), Range Scanning and Memory Scanning. The scanning method... -
Page 53: Scanner Configuration
WiNRADiO G3XX VHF/UHF Receiver Scanner Configuration When a signal strength level is higher than the squelch level, this indicates that a signal has been found. You can configure the software to specify what action you want to be taken at this point. To access this configuration facility, go to Options | Scanning in the top bar menu. -
Page 54: Groups
The WiNRADiO G3XX receiver application makes it possible for multiple frequency ranges to be excluded. This is done using the Exclusions button. -
Page 55: Frequency Range Scanning
WiNRADiO G3XX VHF/UHF Receiver Frequency Range Scanning To be able to use Frequency Range Scanning, you need to set up the desired scanning ranges first. This is done using the Ranges button in the Options | Scanning top-bar menu. Note the check box at the start of a range. This is useful in situations where... - Page 56 WiNRADiO G3XX User’s Manual To create a new range, click the New button. This will open a dialog box, where you can specify lower and upper limit frequencies of the range, the step size, modulation mode, squelch level, and, optionally, a description. You can enter as many such ranges as you like.
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Page 57: Memory Scanning
WiNRADiO G3XX VHF/UHF Receiver You can stop or pause this activity using the Stop or Pause buttons. If you use the Pause button, then restarting scanning using Scan Forward or Scan Backward buttons will resume the action from the paused frequency. If you... -
Page 58: S-Meter
WiNRADiO G3XX User’s Manual S-meter The WiNRADiO G3XX receiver is equipped with a very sensitive and selective Signal Strength Meter (S-meter) which makes it possible to measure peak or RMS signal level dBm, µV or S-units, within the IF filter passband. The measurement units are selected by appropriately marked buttons at the bottom of the display. - Page 59 WiNRADiO G3XX VHF/UHF Receiver The Avg button, when activated, shows the S-meter level value as a floating average within the preset time interval (settable from 1 to 99 seconds). This is used to smooth the S-meter movements. Any change which may affect the...
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Page 60: Power Switch
When it is off, the receiver circuitry will be powered down and no sound will be heard through the speaker or headphones. When you exit and restart the WiNRADiO application, the power on/off status at exit will be remembered. Date and Time Displays The clock display indicates the current time and date. -
Page 61: Spectrum Analyzer
WiNRADiO G3XX VHF/UHF Receiver Spectrum Analyzer There are two different versions of a Spectrum Analyzer in the G3XX receiver software. These are selectable by clicking one of the yellow triangle buttons on the left of the On/Off switch. The Spectrum Analyzer display will slide out. - Page 62 WiNRADiO G3XX User’s Manual This smaller version of the spectrum analyzer window can be resized to a convenient size by dragging the bottom edge up or down. The bottom parts of both spectrum analyzer windows are exactly the same. The full-screen version also contains a basic set of the receiver controls at the top, so that the user does not need to go back to the receiver panel to change mode, volume, attenuator, etc.
- Page 63 WiNRADiO G3XX VHF/UHF Receiver To set up spectrum sweeping, enter the Start and End frequencies to specify the start and end of the sweeping range, respectively. Alternatively, you may enter the Center and Span frequencies. Next select the RBW (Resolution Bandwidth), which determines how detailed the spectrum will be (the lower the RBW, the finer the detail).
- Page 64 WiNRADiO G3XX User’s Manual The button with a red round arrow selects continuous sweeping mode, which means that the sweep will continue from the start frequency when the end frequency is reached, and continue in this loop until manually stopped. If...
- Page 65 WiNRADiO G3XX VHF/UHF Receiver The Min, Max and Diff buttons enable the display of minimum, maximum and differential values when continuous sweeping is selected. (A scale for the differential trace will be displayed on the right-hand side whenever the Diff button is pressed.)
- Page 66 WiNRADiO G3XX User’s Manual There are also three zoom-related buttons: The first button centers the zooming action around the marker (if the marker position has been set) - if this button is disabled then zooming will be done with respect to the center of the screen. The next two buttons perform the actual zooming in and out functions.
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Page 67: Appendix A - Troubleshooting
WiNRADiO G3XX VHF/UHF Receiver Appendix A – Troubleshooting Problem: The WiNRADiO application installed OK, but there is no sound coming from the speaker. Solution: Check if you see any noise appearing in the spectrum scope in the demodulator panel (under the AM, AMS, etc., mode selection buttons). - Page 68 WiNRADiO G3XX User’s Manual Note: If you have difficulties accessing the sound card control panels (for example if there is no speaker icon), refer to Appendix B – Sound Card Controls. Problem: I can hear the audio and tune the receiver, but the sound is distorted.
- Page 69 WiNRADiO G3XX VHF/UHF Receiver Problem: I can hear the audio and tune the receiver, but the volume is too low, even if I adjust the volume control to maximum. Solution: Presuming the volume is set to the maximum level (31) in the...
- Page 70 WiNRADiO G3XX User’s Manual Problem: Reception is obscured with a buzzing interference. Solution: Check for the sources of interference in your surroundings: it could be fluorescent lights, a lamp dimmer, or other household appliances. Your PC (especially the monitor) could be the culprit.
- Page 71 WiNRADiO G3XX VHF/UHF Receiver Another way to solve this problem is to close the G3XX application and manually edit the wrG3XXni file in the Windows directory. For example, you will see values similar to these: [Scope-03E27014] Visible=1 Height=300 where 03E27014 is the serial number of your receiver. Your 'Height' value is probably greater, but you should change it to a reasonable value (about 200).
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Page 72: Appendix B - Sound Card Controls
WiNRADiO G3XX User’s Manual Appendix B – Sound Card Controls Sound card control panels and their settings can be somewhat confusing. They are also rather inconsistent from one version of Windows to another. The G3XXe receiver requires that the sound card Wave input is unmuted. The volume can be then adjusted using the Wave slider and the master Volume Control. - Page 73 WiNRADiO G3XX VHF/UHF Receiver Windows Enable “speaker” icon Recording/playback volume controls Control Panel | Control Panel | Multimedia Multimedia Audio-tab Audio-tab Checkbox: “Show volume control on the Sound Playback: Click on button taskbar” Control Panel | Control Panel | Sounds and...
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Page 74: Appendix C - Dealing With Interference
One significant source of man-made electromagnetic interference is the personal computer, and the video monitor in particular. Since the WiNRADiO G3XX receiver requires a personal computer to operate, this creates a potential paradox. The WiNRADiO receiver itself is designed to be substantially immune to PC interference. - Page 75 To check this, tune to one of the interfering signals, then switch off the monitor and see if the signal disappears. If the interference still exists you could continue using the WiNRADiO receiver, and live with the fact that some useful frequencies will be obscured by your monitor’s interference, or you can replace your monitor with a ‘quieter’...
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Page 76: Appendix D - Inside Wr-G3Xx Hardware
WiNRADiO G3XX User’s Manual Appendix D – Inside WR-G3XX Hardware Technically minded users may like to explore the WiNRADiO G3XX Receiver and experiment with some of the innovative concepts of this Software Defined Radio. The WiNRADiO G3XX Receiver is one of the first commercially available Software Defined Radios, where the Demodulator function is fully performed in software. - Page 77 WiNRADiO G3XX VHF/UHF Receiver The second mixer again uses a DDS with a PLL to mix the 109.65 MHz signal down to the last intermediate frequency, which is 12 kHz (the last IF frequencies may be selected within a range of 12 to 22 kHz, to suit various special applications).
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Page 78: Appendix E - Inside Wr-G3Xx Demodulator
WiNRADiO G3XX User’s Manual Appendix E – Inside WR-G3XX Demodulator The internal structure of the G3XX demodulator is easily accessible by pressing the Study button in the demodulator panel. The G3XX Demodulator relies on a general quadrature representation of the incoming modulated signals. - Page 79 WiNRADiO G3XX VHF/UHF Receiver Within the displayed spectra, a red color frequency cursor can be manually dragged, using the left mouse button, over a particular spectral component. The two Vector Voltmeter displays labelled Left/Right indicate the relative amplitude and phase difference between the two spectral components at the cursor frequency.
- Page 80 WiNRADiO G3XX User’s Manual The CW received signals are first down-converted to zero Hz, and then, after additional channel filtering, up-converted to a convenient audio frequency. This frequency (a digital BFO) is user-adjustable, by changing the value of the CW tone frequency parameter in the demodulator setup.
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Page 81: Appendix F - Developer Support
WiNRADiO G3XX VHF/UHF Receiver Appendix F – Developer Support WiNRADiO has always extensively supported third-party software development efforts with all our receivers, and the WiNRADiO G3XX receiver is no exception. We provide technical details for developers to be able to develop the following: •... -
Page 82: Appendix G - Hardware Options
WiNRADiO G3XX User’s Manual Appendix G – Wide-band FM Option “WFM” option makes it possible to receive wide-band modulated signals (“broadcast FM”) on the G3XX receivers. On the standard G3XX receiver, the wide-band FM capability is not included, because it is not possible to provide this within the constraints of the 15 kHz instantaneous bandwidth of the digitized IF signal and the DSP software processing power. -
Page 83: Appendix H - Frequency Calibration
WiNRADiO G3XX VHF/UHF Receiver Appendix H – Frequency Calibration The G3XX receiver series features an excellent frequency accuracy and stability for a receiver of its class. It is however possible to improve this accuracy yet further, by individual calibration. The receiver calibration is accomplished by inserting a reference frequency parameter in the wrG3XX.ini file which resides in the Windows directory. - Page 84 WiNRADiO G3XX User’s Manual Then scale the frequency difference to 16.384 MHz. For example, if the frequency difference is -152 Hz at 10 MHz, it will be -249 Hz at the 16.384 MHz reference frequency. To arrive at the corrected reference frequency, subtract the frequency difference from 16384000.
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Page 85: Appendix I - S-Meter Calibration
WiNRADiO receiver users. The calibration procedures should not be attempted by persons without a deeper understanding of the underlying concepts, as WiNRADiO can only provide a limited technical support for this application, and can accept no responsibility for any difficulties arising from its use. -
Page 86: Appendix J - Usb Interface Diagnostics
WiNRADiO G3XX User’s Manual Appendix J – USB Interface Diagnostics The flashing pattern of the blue LED on the external G3XXe model has a diagnostics meaning. Normally, when the receiver is powered up and the application running, the blue LED should flash in a dih-dah pattern (i.e. a short flash followed by a long one). - Page 87 WiNRADiO G3XX VHF/UHF Receiver...
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