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is full CW or the Squelch is full CCW, the LED will go out and the control movement will cease.
Release the VOL+/- key and press again to pass over center position or continue in the opposite
direction. This will give you feedback that the PBT control is centered and the RF Gain or
Squelch is at the end of the control. To exit this mode and go back to the volume control, press 0
and then one of the volume keys, or press the Mute key. When you press the Mute key to return
to volume control, the LED will blink twice.
The RF/SQL and PBT controls can be returned to the center position and NR turned off by
pressing 0then VOL+/-. This will return these controls to the center position, turn off NR, and
return VOL+/- control back to volume. To return VOL+/- control to volume without affecting
these settings, use the Mute key.
You can quickly position the RF Gain, SQL, and PBT controls to their default, minimum, center
(PBT), and maximum positions. For example: you can move the Inner PBT control to full CW
by pressing the key sequence 4 9 VOL+/-, and then move in the CCW direction with the VOL-
key.
The PBT controls can be adjusted together in two separate ways. You can move the Inner and
Outer PBTs either in the same direction from the current settings, or in opposite directions from
the current settings. Moving the Inner and Outer PBTs together in the same direction is in effect
an IF bandpass shift. Moving the PBTs together in opposite directions adjusts the IF bandwidth.
Check owner’s manual for more information on the effect of PBT adjustments. Only certain IF
filter combinations on the R75 can be adjusted in this way.
There is a benefit to controlling the RF Gain and Squelch from the remote. On the front panel of
the R75, the RF Gain and Squelch are in one control. Moving the control to the left of center
controls the RF Gain. Moving the control to the right of center controls the Squelch. Using the
remote for controlling the RF Gain and Squelch lets you adjust them separately. You can adjust
the Squelch and then set the RF Gain independently.
You can set up to six User Defined analog settings for each of the RF Gain, Squelch, Inner and
Outer PBT, and both PBT controls. You can tune the receiver using the normal or default
settings on these controls and then adjust them quickly with the User Defined settings to better
receive a station. The User Defined settings let you go immediately to your preferred settings for
best reception. Use the VOL+/- key for the direction you wish to move. The User Defined
analog settings are kept in non-volatile memory and are not changed except by the configuration
command to set these values. The User Defined analog control values are set in the range from 0
to 255. The center (12 o’clock) position on the PBT controls is 128. The full CW (12 o’clock)
position on the RF gain is 255. The full CCW (12 o’clock) position of the SQL is 0.
Enabling NR (Noise Reduction) and setting NR level
The NR and NR level can be set using the direct entry method. Use 3 x VOL+/- to enable NR
and set the NR level to x. The level can be set directly from 1 to 9 using this direct entry method.
Setting the level to 0 will disable the NR. You can also select the NR mode and use the VOL+/-
to move up and down through the NR level settings. You must press the VOL+/- each time you
want a level change. Holding the VOL+/- key will not continuously move through the levels.
Using the VOL+ moves the level from 1 to 9. Using the VOL- moves the level from 9 to 1.
Each press of VOL+/- will move one level up or down.
