Yaesu FTDX9000MP Operation Manual page 11

VRF (Variable RF Filter) Preselector Filter (Page 68)
Yaesu's robust VRF (Variable RF Filter) preselector provides a relay-selected RF selectivity much tighter than that afforded by tradi-
tional bandpass filter networks. Sealed relays select heavy-duty inductors and capacitors, providing a tracking RF filter that protects the
RF amplifier and following stages from strong out-of-band energy.
First IF 3 kHz Roofing Filter (Page 23, 28, 69)
In the 40 MHz 1st IF, three selectable roofing filters are provided, in bandwidths of 3 kHz, 6 kHz, and 15 kHz, to protect the following
stages from strong signals that could degrade dynamic range in the first IF amplifier and subsequent stages. The roofing filters are
automatically assigned according to the operating mode, but the operator may override the automatic selections on the fly.
CONTOUR Filter Enhances "Analog Feeling" of DSP Filters (Page 29, 31, 70)
The DSP-based Contour system is a unique five-band filter that may be used to roll off or peak the IF response. It is chiefly useful for
modifying the response of the ultra-sharp DSP filters, allowing you to roll off (or emphasize) certain frequency components. Oftentimes,
the result is that a difficult-to-understand signal suddenly will pop out of the background noise as solid copy.
SLOPED AGC Circuitry (Page 81)
In traditional AGC systems, all signals rising above a certain RF level are then clamped together at the same audio output, so as to
prevent distortion throughout the IF and AF stages. In the FT
provide an AGC response whereby ever-increasing signal strength results in a slightly-louder audio response, still without accompany-
ing distortion. This lets you use your brain to sort out weak signals from strong ones more effectively.
Receiver AF Limiter Circuit (Page 29, 33, 82)
Occasionally a noise burst or a sudden transmission from a loud station may startle you if you have the AF Gain turned up, and may even
damage your hearing temporarily. The FT
on the available audio output power, much like the AGC circuit does in the RF and IF stages.
"Adjacent Channel Encroachment" S-Meter Monitor (Page 33, 84)
When operating CW in a narrow bandwidth like 300 Hz, you may not be aware of the presense of strong stations that may be making it
difficult for others to hear you. In these situations, the "ACM" (Adjacent Channel Monitor) will take over the Sub Receiver, center it on
the Main Receiver frequency, and display ± 1.2 kHz of signal activity on the Sub Receiver's S-meter (without feeding the interfering
audio through). This alerts you to the situation, and you can QSY or ask the other station to QSY.
Rugged, High-Output Final Amplifier Design (Page 99)
The final amplifier stage of the FT
design. The large-area die-cast aluminum heat sink is monitored thermostatically, and a quiet cooling fan will engage when the heat sink
temperature rises during long periods of high-power transmission.
Ultra-linear Class-A Operation Capability (Page 98)
The FT 9000MP's Class-A capability provides ultra-linear amplifier operation at 100 Watts of power output. Typically, 3rd-order
DX
IMD products are suppressed more than 50 dB, while 5th- and higher-order distortion products are at least 70 dB down during Class-A
operation.
Parametric Microphone Equalizer Circuit (Page 96)
For unmatched flexibility in tailoring your microphone's audio to match your voice, Yaesu's engineers have incorporated the industry's
first Three-Band Parametric Microphone Equalizer, which allows you to enhance or suppress frequency components in three different
audio bands. Equalization may be applied independently to microphones attached to the front and rear panel microphone jacks.
Connecting Your After-market Computer Monitor for Multiple Function Displays
(Refer to the separate Data Management Unit Operating Manual)
Connection of your after-market computer monitor (not supplied) allows display of a number of important and useful operating status
and function displays. These include the Menu mode, World Clock, Spectrum Scope, Audio Scope and Oscilloscope, Logbook, Tem-
perature/SWR monitoring, Rotator Control, and Memory Channel listings.
Customization of Your FT
A wide range of custom configuration options (other than a better location or taller tower!) are available for your FT
allowing you to build a Dream Station from the "MP" version foundation.
Because these options involve high-technology modules, please consult WDXC regarding factory installation of these items.
RF μ-Tuning Units (MTU-160, MTU-80/40, MTU-30/20)
On the 14 MHz and lower bands, the μ-Tuning Units provide extraordinarily high Q; the resulting steep shape factor is a powerful
aid for reducing off-frequency interference. Separate modules are available for the 1.8 MHz, 3.5/7 MHz, and 10.1/14 MHz bands,
and they may be installed on the Main Receiver only (not in the Sub Receiver).
Thanks to the large (1.1"/28 mm) inductor through which a stack of ferrite cores is adjusted, the narrow RF bandwidth of the μ-
Tuning System provides unmatched protection for the receiver front end and following circuits.
TFT Display Unit (TFT-9000)
The TFT-9000 TFT Display Unit allows to display the enable the "World Clock," "Spectrum Scope," "Audio Scope/Oscilloscope,"
"Logbook," "Rotator Control," and "Temperature/SWR Status Display" functions to the internal 6.5" TFT Display, which provides 800
x 480 dot screen high resolution and easy viewing.
FT 9000MP O
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9000MP, however, you can engage the "Sloped" AGC capability to
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9000MP provides an AF Limiter (AFL) circuit which, once engaged, clamps an upper limit
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9000MP utilizes parallel push-pull SD2931 MOS FET devices in a conservative, high-stability
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9000MP
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