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4.24 - Timer System

When you Right-click  o , you are presented with a timer system that can manage up to 16 timed events, mixing receive and receive+record events according to your preferences.


Recording and Timer Event Controls

4.24.1 - Recording Event Setup

The way the system works is you set up one or more events and then add them to the event list. You set up the following items:

Start Time: The system will pre-roll, that is, turn on Run, 15 seconds before this time. When you change this setting, if the End Time is earlier than the Start Time, it will automatically be set equal to the start time.
End Time: The system will post-roll 15 seconds past this time, and then turn off Run. This time must be later than the Start Time
Memory to Use: 10 seconds after the pre-roll begins, which is also 5 seconds before recording begins if you have record enabled in the event, the system will recall the memory you selected using   1 ...  0 , which in turn will set the frequency, demodulator type, bandwidth, and so on.
Event Name: This allows you to specify a name for an event.
File Name: This allows you to specify a file name for the recording file this event will create if   record  and   live  are both checked. Please note that this does not automatically put a file extension on the file. If you want a  .wav  extension, you must specify it:  myfilename.wav 
  Use Custom Filename  For a custom filename to be used, this must be checked when the event is added to the list. If it not checked, then the event will be recorded with a file name that describes the time and date of the recording.
  Live  For the timer to run, this must be checked when the event is added to the list. If it not checked, then the event will be added in a cancelled state.
  Record  If this is checked when you add the event to the event list, 15 seconds after the pre-roll begins, and 5 seconds after the chosen memory has been selected, recording will commence; or in other words, right at the designated Start Time. Recording will stop at the designated Stop Time.

4.24.2 - The Event List

In the event list, you'll see the event name first, followed by the start time which begins with the memory first, indicated an "m" in front of it. Then the start time. Next column, the memory information is repeated, and then the stop time.

Finally, there is a set of four flags that tell you about the event. These flags constantly reflect the state of the listed events. They may be understood as follows:

In the first position, if you see "<", that means the event is actively in preroll. If you see "m", that means the event is actively setting the chosen memory for the event. If you see "o", that means recording is active. If you see "=", that means the event is active, but receiving, not recording. If you see ">", then the event is active in postroll. If you see "-", then the event is not currently active.

In the second position, if you see "F", then the event will record to the custom filename in column 2, if the name is not empty. If you see "-" in the second flag position, any recording produced by this even will have a unique name consisting of a date and time stamp, with the file extension  .wav .

In the third position, if you see "R", that means that the event will record when it is active as described above. If you see "-", it means that the event will not record when it runs.

In the fourth position, if you see "X", that means the event was cancelled, either because it has already run, or because it was interrupted by turning off Run or  o .

4.24.3 - Cancelled Events

There are several ways an event can be cancelled. Turning off Run or will cancel an active event. Turning off  o  will cancel the event, but will leave Run on. The event running to completion normally will also cancel it. Quitting SdrDx and restarting it will retain all event information, but all events will be cancelled. To re-enable them, open the dialog with Right-click  o , use Delete Selected Event, select   Active , and then add the event back using Add Event. Events only run once.

4.24.4 - Adding Events

You may add up to 16 events. They may not overlap in time. You can mix non-recorded reception times with recording times, as long as you provide a minute's difference between event end and start times. The Add Event button is only available if the event is correctly set up. Observe the status line at the bottom of the dialog; it will tell you what the current state of the settings is, in case it isn't clear to you why the Add Event button isn't available. As soon as you add an event to the list, if it was live when you added it, the system will respond to it.

4.24.5 - Renewing Events

You can renew an existing event. For instance, say you had a recording set to run on the previous evening. Now, you'd like that recording to run again during the same time. Simply Left-click on the event, and lclickRenew Selected Event. If the time period has not passed yet today, then it will be set to run today. If the time period has passed already today, then it will be set to run tomorrow.

4.24.6 - Changing Event Cancelled State

Under the event list is a button which, when you have an event in the event list selected, will allow you to change the event's Cancelled state. The button will appear as either Enable Event or Disable Event, as appropriate for the event selected.

4.24.7 - Deleting Events

You can delete an event from the event list by clicking on it, and then pressing Delete Selected Event. This button is only available when a valid event is selected from the event list.

4.24.8 - Editing Events

Pressing Delete Selected Event removes the event from the list, but also sets up the Recording Event Setup area with the settings that were in the event. So you can use this to edit an event; delete it first, change what you need to change, and then simply add it back with Add Event. See also Renewing Events.

4.24.9 - Other Controls

You can use the :00, :15, :30 and :45, controls to set quarter hour intervals.   S  and   E  control which time gets set; start or end. now sets both the start and end times to right now in GMT time.

Note: All times are in GMT / UCT
Tip: Try your memory settings first, so you're sure they do what you want them to do. Pay attention to the demodulator mode, the demodulator bandwidth and of course the center and demodulator frequency settings. Switch between memories to be sure everything is being set up the way you want it to with the memory you plan to use. SDR bandwidth must be set to the bandwidth you want before recording starts.


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