User manual

RF Technology WinTekHelp User Manual Page 28
3.2.4.1 Frequencies WinTekHelp User Manual
.3.2.4.1 Frequencies
This is a top-level tree item. Under it, are all the frequencies that are allowed in a slot.
.3.2.4.2 Delays
This is a top-level tree item. Under it are all the COS Start/End and Loop Start/End delays.
These Start delays will hold up the generation of COS and Loop for the specified time after detection of a
frequency to tune to. This can be used as an “anti-chatter” feature. If the signal is noisy, and the output is
keying up an exciter, then unless the signal is able to be received for at least the Start up delay
(continuously) the exciter will not key up.
The Stop delay can be used when an Exciter, which has been keyed up by COS or Loop, does not have a
Tx Tail and/or a No None Period. In this instance, the Stop delay can implement these delays for the
exciter.
.3.2.4.3 Priority Time Out (Seconds)
This is a top-level tree item. Under it, is the priority time out value. This value is relevant if there is
more than one frequency.
If there is more than one frequency in a slot, and if that slot is selected, the receiver will scan the
frequencies in that slot. The first frequency defined in the slot (the one closest to the top-level item
“Frequencies”) is, by definition, the priority frequency.
If the priority time out value is zero seconds, then the “priority” frequency has no more or less priority
than any other frequency.
If the time out value is not zero (it defaults to 5 seconds), and if the receiver is tuned to a non-priority
frequency, it will stay tuned to that frequency for the time out time. Then it will briefly tune to the
priority frequency, and if there is insufficient Carrier Strength, or SINAD, or incorrect tone etc, on the
priority frequency, it will switch back to the non-priority frequency. If, though, the priority frequency did
have sufficient carrier, and SINAD, and correct tone etc, it would automatically switch to the priority
frequency.
NB. During the time taken to “test” a priority frequency, the audio is interrupted. If the priority
frequency is only being tested for sufficient carrier strength or SINAD, the time taken is brief and normal
speech will not seem to be interrupted. The time taken to “test” the priority channel is lengthened quite
dramattically, though, when a CTCSS tone is also being checked . This time is extended even more for
checking a DCS code. In such cases, there will be a noticeable interruption in the audio.
.3.2.4.4 De-Emphasis/Flat
This is a third level tree item, and it is a branch off an individual frequency. It has no “leaf” items; ie it
can not be expanded. Its state will toggle with a right click of the mouse. It allows one to define whether
or not to apply De-Emphasis compensation or not to the audio.
.3.2.4.5 Carrier Squelch Offset/ Noise Squelch Offset
This is a third level tree item, and it is a branch off an individual frequency. It has one “leaf” item,
which is the offset value. The value is used to set a slightly higher or lower threshold for Carrier or
Noise than the threshold set from the front panel for a particular frequency.
.3.2.4.6 Tones
This is a third level tree item. If it exists, it implies that there is at least one CTCSS tone defined for the
frequency.
Each frequency can have from 0 to 6 CTCSS tones defined for it. If there is no tone defined for a
frequency, then the receiver will ignore CTCSS tones when scanning that frequency.
When, this item is expanded, it lists the individual CTCSS tones.