CONVENIENCE FEATURES

RF GAIN (SSB/CW/AM MODES)

The RF Gain controls provide manual adjustment of the gain levels for the receiver RF and IF stages, to account for noise and/or signal strength conditions at the moment.

1.The Main [RF GAIN] knob should, initially, be ro- tated to the fully clockwise position. This is the point of maximum sensitivity, and counter-clockwise rota- tion will gradually reduce the system gain.

2.The Sub [RF GAIN] knob operates identically to the Main [RF GAIN] knob. The fully clockwise position

of the Sub [RF GAIN] knob should always be utilized as a starting point for operation.

ADVICE:

￿As the [RF GAIN] knob is rotated counterclockwise to reduce the gain, the S-meter reading will rise. This indicates that the AGC voltage being applied to the receiver is increasing (which causes a reduction in re- ceiver gain).

￿Rotating the [RF GAIN] knob control to the fully counter-clockwise position will essentially disable the receiver, as the gain will be greatly reduced. In this case, as well, the S-meter will appear to be “pegged” against the right edge of the analog S-meter scale.

￿The Sub [RF GAIN] knob operates identically to the Main [RF GAIN] knob. The effects of counter-clock- wise rotation of the Sub (VFO-B) receiver’s RF Gain control may be observed visually on the Sub band (VFO-B) S-meter.

QUICK POINT:

￿Reception frequently can be optimized by rotating the [RF GAIN] knob slightly counter-clockwise to the point where the incoming noise level is just about the same as the “stationary” meter needle position as set by the adjustment of the [RF GAIN] knob. This set- ting ensures that excessive gain is not being utilized, without so much gain reduction that incoming signals cannot be heard.

￿The RF Gain control, along with the IPO and Attenua- tor features, all affect the system receiver gain in dif- ferent ways. As a first step in dealing with high noise or a crowded, high-level signal environment, the IPO generally should be the first feature engaged, if the fre- quency is low enough to allow the preamplifier to be bypassed. Thereafter, the RF Gain and Attenuator fea- tures may be employed to provide precise, delicate adjustment of the receiver gain so as to optimize per- formance fully.

Main [RF GAIN] Knob

Sub [RF GAIN] Knob

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FT-2000 OPERATING MANUAL