FRONT PANEL CONTROLS & SWITCHES

ATT Switch

This button selects the degree of attenuation, if any, to be applied to the receiver input.

Available selections are –6 dB, –12 dB, –18 dB, or OFF, and the selected attenuation level appears in the ATT column of the Receiver Configuration Indicator on the display.

ADVICE:

￿The Attenuator affects both the Main (VFO-A) and Sub (VFO-B) receivers.

￿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.

IPO (INTERCEPT POINT OPTIMIZATION) Switch

This button may be used to set the optimum front end characteristics of the receiver circuit for a very strong- signal environment. Available selections are AMP 1 (low distortion amplifier), AMP 2 (2-stage low-distortion RF amplifier), or ON (bypasses the front end RF amplifier), and the selected receiver RF amplifier appears at the IPO column of the Receiver Configuration Indicator in the display.

ADVICE:

The IPO switch affects both the Main (VFO-A) and Sub (VFO-B) receivers.

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 selected bandwidth appears in the FLT column of the Receiver Configuration Indicator on the display.

ADVICE:

￿The Roofing Filter selection applies to the Main band (VFO-A) only.

￿Because the roofing filter is in the first IF, the pro- tection it provides against interference is quite sig- nificant. 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.

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FT-2000 OPERATING MANUAL