Yaesu Contest, Руководство по эксплуатации

Страница: 23 / 54

FT
DX
9000MP/C
ONTEST
D
ATA
M
ANAGEMENT
O
PERATION
M
ANUAL
A
UDIO
S
COPE AND
O
SCILLOSCOPE
U
SING THE
A
UDIO
S
COPE
The Audio Scope is particularly useful when making adjustments to the transmitter, especially when setting up
the Speech Processor as well as the Parametric Microphone Equalizer.
On receive, you can observe the signal characteristics and quality of the incoming signal, as well. In the case of
the Waterfall display, this can be used for precise frequency alignment of incoming signals to correspond with
filters used in your computer’s sound card or modem. The sweep time (speed) of WF-2 is faster than WF-1, and
you can choose the sweep most appropriate for your operating application.
1. By pressing the [ 2/3.5
](
MODE
) key, the Waterfall
mode can be modified. The available selections
are:
NORMAL WF-1 WF-2 NORMAL ......
NORMAL is a regular spectrum display.
WF-1 and WF-2 are Waterfall displays, with WF-
2 utilizing a faster sweep time than the WF-1 se-
lection.
2. Pressing the [ 3/5
](
SOURCE
) key lets you select
the source for the audio to be viewed by the Au-
dio Scope. The selections are:
VFO-A VFO-B EXT VFO-A ......
Advice : In the case of the Contest version, the
RX switch to the left of the CLAR/VFO-B knob
will, when pushed, cause both the VFO itself and
the Audio Scope display to change to VFO-B.
Additionally, when the optional RXU-9000 Dual
Receive Unit is installed, you may use the [
4/7 ]( A/
B ) key to make this change, just like on the MP
version.
When EXT is selected, you can observe the au-
dio wave form of a signal provided by equipment
connected to the
AUDIO IN jack on the rear panel
of the transceiver.
3. Press the [ 4/7
](
ATT
) key to change the setting
for the attenuator. The available settings are:
0.3 V 0.1 V 1.0 V 0.3 V ......
Advice : By using this feature, you can conveniently
monitor the status of the CONTOUR filter, the per-
formance of the IF Notch, and the WIDTH/SHIFT sta-
tus.
W
ATERFALL
D
ISPLAY
S
PECTRUM
D
ISPLAY
A
UDIO
S
COPE
S
PECIFICATIONS
Frequency Range : 100 Hz - 4 kHz
Frequency Resolution : 20 Hz (Approx.)
Display Range : 80dB (Approx.)
Signal Processing : FFT (Fast Fourier Transformation)
Input Level : 1 Vp-p Input (ADC Max. value)
Attenuator : @0 dB, top edge;
@10 dB, 1 division of shift;
@20 dB, 2 divisions of shift
Page 21