Ten-Tec PARAGON - Page 19

34 FRONT PANEL FUNCTIONS Тһе
following sections describe the front panel
displays and the controls which are not located
on the keypad. Refer to FIGURE 3-3 to help
locate each control,
3-4.1 DISPLAY AREA As shown in FIG-
URE 3-1, the vacuum fluorescent display
shows the frequency, Rx/Tx Offset, memory
status, the date, time, or tag, and other micro-
processor controlled functions. The eight an-
nunciators above show the VFO selection,
OFFset or MEMory selection, and the DATE,
TIME, or TAG selection.
3-4.2 AF GAIN/TONE The AFGAIN con-
trol varies the audio output of the transceiver.
The TONE control is a low pass type with a
rolloff of approximately 15 dB at 5 kHz.
3-43 METER Є SWITCH In receive
mode the meter will automatically read 5 units
when the meter switch is in any position. The
S meter will be accurate only when the RE
control is fully clockwise. The meter is factory
calibrated for a reading of S9 at 50 ЦУ when
operating at 15 MHz.
When transmitting, the meter indicates
the following:
IC position measures the current drawn
by the final amplifier module. Use the scale
marked 0 to 20 amperes.
SWR position provides a reading of
power reflected from the antenna, When the
forward power is 100 watts, the standing wave
ratio can be read from the scale marked SWR.
FWD position measures forward power
tothe antenna. Use the FWD scale marked 0
to 100 watts.
To determine SWR, place meter switch
in FWD position, press TUNE and adjust RF
PWR control fora reading of 100 watts. Then
switch the meter switch to REF and use the
scale marked SWR. Press the TUNE key
again to return to transceive mode.
PROCESS position displays the level
of compression applied to the MIC input when
the PROCess control is turned on.
3-44 NOISE BLANKER Те М.В. switch
turns on the blanker circuit. The WIDTH con-
trol varies the blanking pulse width.
3-455 ATTENUATOR Toreduce suscepta-
bility to receiver overload in the presence of
extremely strong signals, the ATTN switch
removes the front end RF amplifier from the
receiver circuitry. The effectis a 20 dB reduc-
tion in signal level to the first mixer but with
more dynamic range and greater sensitivity
than would be the case with a simple attenu-
ator. The LED below the switch indicates that
the attenuator has been selected.
3-4.6 BPF/FADE This control fades from
normally flat audio response to a bandpass
filter variable from 220 to 1700 Hz with the
BPF control. Various amounts of bandpass
effect can be chosen by the degree of clock-
wise rotation. The filter width is 3596 of the
selected center frequency at the -6 dB points.
3-4.7 PBT / NOTCH The PBT control ad-
justs the position of the PBT IF crystal filter in
relation to the fixed second IF filter. When the
selected filter is wide, i.e. 2.4 or 1.8 kHz, the
PBT control essentially becomes a variable
bandwidth control. Counter-clockwise rota-
tion shifts the passband towards the low side
of the signal when in USB mode, clockwise ro-
tation shifts the passband toward the high side
of the signal. When in LSB mode, the above
directions are reversed.
The PBT circuit in the PARAGON pro-
duces the effect of varying the frequency re-
sponse of signals passing through the narrow
filter, which enables you to separate signals
which are close together. On RTTY it can
place the narrow filter to pass only the 2295
and 2125 Hz tones for superior rejection of