diff --git a/Scanner.md b/Scanner.md index 0ff9a71..e1af445 100644 --- a/Scanner.md +++ b/Scanner.md @@ -1,37 +1,60 @@ The scanner should be able to scan about 20 frequencies per second, as it requires about 50ms to stabilize after re-tuning. -The scanner will stop into any frequency carrying a signal strong enough. You can adjust the signal power threshold with the SQUELCH. +The scanner will stop on any frequency carrying a signal strong enough. You can adjust the signal threshold with SQUELCH. For better scanning precision, once a frequency with a powerful enough signal is found, the scanner will analyze it for some extra milliseconds, in order to confirm that the signal is still present (and not a spurious peak). ## Big Numbers Frequency -The big numbers display will show the frequency value currently being scanned, using the following color code criteria: +The big numbers display will show the frequency currently being scanned, using the following color code criteria: -* GREY scanning -* YELLOW analyzing possible signal -* GREEN found a strong enough signal +* GREY: Scanning +* YELLOW: Analyzing possible signal +* GREEN: Found a strong enough signal +## Scan vs Search Modes -### Frequencies to scan +The scanner can either *Scan* frequencies from a frequency list in memory, or *Search* all frequencies sequentially between a starting and ending frequency range. The `SRCH`/`SCAN` button toggles between those two operating modes of the scanner app (button indicates the mode that will be switched to when pressed). -The application parses `FREQMAN\SCANNER.TXT` by default. You can use the Frequency manager app (Tools -> **Freq managern**) to add more entries to that list. +## Frequency List -Alternatively, you are able to manually input a scanning range "on the fly" by keying in START and END frequencies, while adjusting the STEP selector. +The application loads a list of frequencies (f=) and/or a search range from `FREQMAN\SCANNER.TXT` by default, or you can use the `LOAD` button to load from a different file. You can use the Frequency manager app (Tools -> **Freq manager**) to create or edit frequency list files. -### Modulation Mode -You can select between **AM** (DSB 9k, DSB 6k, USB+3k, LSB-3k, CW), **NFM** and **WFM** modulation modes. +If the application finds a frequency _range_ (a=,b=,s=) in the frequency file, it is loaded into the SEARCH START and END and STEP fields. Alternatively, you are able to manually input a search range "on the fly" by keying in SEARCH START and END frequencies and the STEP selector. -## Bottom Buttons +### Rotary Encoder -There are six buttons at the bottom of the screen, useful for the following tasks: +Whenever the ``/`` button is highlighted, the rotary encoder may be used to scroll through the frequencies in the Scan list, or through the Search range (regardless whether *Pause* is active). -* Manually Pause / Resume the scanning -* Change scanning direction -* Jump into the MIC TX RX app (2-WAY Radio) -* Jump into the RX->AUDIO app (for further analysis) -* Delete the current frequency on display from the (temporary) scanning memory -* Add the current frequency into the SCANNER.TXT file +## Radio Settings -# Freqman file format +* **Gain:** Setting are shown in order of **AMP** 0=0db or 1=14dB, **LNA**(IF) (0-40) and **VGA** (Baseband Gain) (0-62). +* **VOL:** Audio volume. +* **SQ:** Squelch level. When *Pause* is not active, the squelch level determines the minimum signal level that will cause the scanner to pause on a strong signal while scanning or searching (until the **Wsa** Wait timer expires). When paused for any reason, the squelch level also determines whether audio output is enabled or *squelched*. +* **MODE:** Modulation mode; **AM** (DSB 9k, DSB 6k, USB+3k, LSB-3k, CW), **NFM** or **WFM**. +* **BW:** Select signal bandwidth (available values depend on modulation **MODE** setting). +* **STEP:** Selects frequency step increment when performing a sequential **SEARCH**. + +## Buttons + +The purpose of each of the buttons on the screen is as follows: + +* `LOAD`: Loads scan frequency lists and/or search ranges from a file (in **Freq Manager** format). +* `MCLR`: Clear list of scan frequencies in the temporary scanning memory (frequencies may subsequently be added to the scan list using `ADD FQ` or `LOAD`). +* ``/`AUDIO app (for further analysis) +* `DEL FQ`: Delete the current frequency on display from the (temporary) scanning memory +* `ADD FQ`: Add the current frequency into the SCANNER.TXT file + +## Delay Settings +There are two user-adjustable wait settings while scanning: +* **Wsa:** Wait time while Signal Active, in seconds. When this wait time expires, scanner will skip to the next frequency automatically, even if there is a strong signal present. A value of 0 disables this timer, resulting in the scanner remaining on a strong signal forever, or until changed by the **Rotary Encoder**. A non-zero value of **Wsa** is also known as "Browse" mode. +* **Wsl:** Wait time after Signal Loss, in seconds. When a strong signal drops below the squelch threshold, scanner will remain on this frequency for the specified number of seconds before skipping to the next frequencies. + +## Other Fields +When scanning, the current frequency index is shown on the screen, along with the count of number of frequencies in the scan list. If a description is found in a loaded frequency file, the description will also be displayed on the screen above the Big Numbers Frequency (otherwise the loaded file name will appear, or "SEARCHING..." in Search mode). + +## Freqman File Format See [Freqman Manager](Freqman-manager) page