User manual

RF Technology WinTekHelp User Manual Page 25
WinTekHelp User Manual 3.2.3.2 Frequency
Each channel can have a unique set of parameters. Thus, a receiver can have 256 different operating
states, depending upon the channel number read from the rear panel, or, what channel select override
parameter has been programmed.
The user can directly enter the channel number, or click at the top or bottom of the “Spin Button” to the
right of this field to step up or down through the list of channels.
This allows a user to program every exciter with the same channel data, and then direct installation
personnel to configure each unit, by simply selecting the channel to use in each site and rackframe
position. In this way, a failed unit can be swapped out quickly, without requiring any complicated on-site
setup procedure.
.3.2.3.2 Frequency
The user enters the frequency to which the receiver will tune, in this field. This frequency must be
between 25.0 and 50.0MHz, and it must be a multiple of 1.25kHz.
.3.2.3.3 DCS Enable
In order to enable the entering of a DCS code, the user must first click on this checkbox.
Note that the ability of a receiver to decode a DCS code may not be possible on all receivers. This
feature is available from Rev 2 receiver hardware.
.3.2.3.4 CTCSS Tone or DCS Code
This field is used to “program” what is referred to as “tone squelch”. This is the ability of a receiver to
keep its squelch closed for signals that meet carrier level and noise level requirements, unless it can also
detect a specified CTCSS tone.
If the user enters a CTCSS tone frequency into this field, that is between 67.0 Hz and 257.0 Hz, then the
receiver will not open the Squelch unless this tone is being received. They can enter the CTCSS tone
frequency in Hertz, or the two-letter EIA RS470 code. In other words “tone squelch”, is enabled.
If no tone is entered, or a tone of 0Hz is entered, the receiver will ignore any CTCSS tones that may or
may not be received. The squelch will open if the receiver finds sufficient signal strength (as set by the
C.Sq Potentiometer) or that the noise is less than specified by the N.Sq Potentiometer. In other words,
“tone squelch”, is disabled.
Fig 14