FT-2000
Operating Manual
Vertex Standard Co., Ltd.
51
Advice:
The VRF filter effects to both the Main (VFO-A) and Sub (VFO-B) bands.
The VRF Filter operation will be memorized independently on each VFO in the
VFO stack.
Quick Point: The VRF filter, utilizing high-quality coils and capacitors that provide
high Q, yields a bassband that is approximately 20% to 30% the width of a traditional,
fixed bandpass filter. As a result, significantly more unwanted signal rejection is
provided. Within each Amateur band, 64 adjustment steps are provided (50 MHz: 8
steps), if you wish to skew the response in a particular direction so as to enhance
interference rejection even more.
Interference Rejection (Signals Off Frequency by Just a Few kHz)
R.FLT (Roofing Filters)
Narrow-band Roofing Filters of 15 kHz, 6 kHz, and 3 kHz bandwidths are provided in
the first IF, right after the first mixer. These filters provide protection fort the 2nd
mixer, DSP, and other circuitry that follow and can dramatically improve reception on
a very crowded band (during a contest, etc.). Typically, the AUTO selection mode is
satisfactory for most operating situations, but in an extremely crowded phone band you
may wish to select, for example, the 3 kHz roofing filter for SSB operation.
Press the [R.FLT] button to toggle the Roofing Filter selection.
AUTO 15 kHz 6 kHz 3 kHz AUTO
Advice:
The Roofing filter effects to the Main band (VFO-A) only.
As you repeatedly press [R.FLT] button, you will observe notation at the R.FLT
column of the Receiver Configuration Indicator on the display, denoting the Roofing
Filter currently in use.
Typically, this selection will be set to “AUTO.”
The Roofing Filter selection will be memorized independently on each VFO in the
VFO stack.
Quick Point:
The “AUTO” selection of the Roofing Filter is based on the operating mode.
However, you may override the automatic selection, if band conditions warrant a
different (usually, a tighter) selection.
The AUTO mode Roofing Filter selections are shown below:
AM/FM/FM-PKT 15kHz