FT-2000
Operating Manual
Vertex Standard Co., Ltd.
11
The Attenuator effects to both the Main (VFO-A) and Sub (VFO-B) bands.
The Attenuator may be used in conjunction with the [IPO] switch to provide two
stages of signal reduction when an extremely strong signal is being received.
14. IPO (Intercept Point Optimization) Switch
This button may be used to set the optimum receiver front end characteristics of the
receiver circuit for a very strong-signal environment. Available selections are AMP 1
(low distortion amplifier), AMP 2 (high gain amplifier), or ON (bypasses the front end
RF amplifier), and “IPO” icon will change according to the bandwidth selected.
Advice: The IPO switch effects to both the Main (VFO-A) and Sub (VFO-B) bands.
15. R.FLT Switch
This button selects the bandwidth for the Main Band (VFO-A) receiver’s first IF
Roofing Filter. Available selections are 3 kHz, 6 kHz, 15 kHz, or Auto, and the “R.FLT”
icon will change according to the bandwidth selected.
Advice:
The Roofing Filter effects to the Main band (VFO-A) only.
Because the roofing filter is in the first IF, the protection it provides against
interference is quite significant. When set to AUTO, the SSB bandwidth is 6 kHz,
while CW is 3 kHz and FM/RTTY are 15 kHz. On a crowded SSB band, however,
you may wish to select the 3 kHz filter, for the maximum possible interference
rejection.
16. AGC Switch
This button selects the AGC characteristics for the receiver. Available selections are
FAST, MID, Slow, or Auto, and the “AGC” icon will change according to the AGC
characteristics selected.
When the [AGC] button is pressed independently, it operates to Main band (VFO-A).
When press the [B] button (within five seconds of pressing the [B] switch) followed by
the [AGC] button, it operates to Sub band (VFO-B).
Advice: The Attenuator may be used in conjunction with the [IPO] button to provide
two stages of signal reduction when an extremely strong signal is being received.
17. NB Switch
This button turns the IF Noise Blanker on and off.
Press this button momentarily to reduce a short pulse noise, and “NB” icon appears in