Vertex Standard FT-950 Manual Do Utilizador
FT-950
Operating Manual
Vertex Standard Co., Ltd.
25
the FLT column of the Block Diagram Display on the display.
Advice: 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.
52. [NB] Switch
This button turns the IF Noise Blanker on and off.
Press this button momentarily to reduce short-duration pulse noise; the “NB” icon will
appear in the display.
Press and hold in this button for one second to reduce longer-duration man-made pulse
noises; the “NB” icon will blink for three seconds, then will appear continuously in the
display.
Press this button again to disable the noise blanker; the “NB” icon will disappear.
53. [AF GAIN] -o- [RF GAIN] Knobs
[AF GAIN] Knob
The inner [AF GAIN] knob sets the receiver’s audio volume level. Typically, you will
operate with this control set between the 9 o’clock and 10 o’clock positions.
[RF GAIN] Knob
The outer [RF GAIN] knob is the receiver’s RF gain control, which adjusts the gain of
the receiver’s RF and IF amplifier stages. This control is normally left in the fully
clockwise position.
54. [RX CLAR] Switch
Pressing this button activates the RX Clarifier, to allow offsetting the receiving
frequency temporarily. Press this button once more to return the receiver to the
original frequency; the Clarifier offset will still be present, though, in case you want to
use it again. To cancel the Clarifier offset, press the [CLEAR] button.
55. [TX CLAR] Switch
Pressing this button activates the TX Clarifier, to allow offsetting the transmit
frequency temporarily. Press this button once more to return the transmitter to the
original frequency; the Clarifier offset will still be present, though, in case you want to
use it again. To cancel the Clarifier offset, press the [CLEAR] button.
Advice: 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.
52. [NB] Switch
This button turns the IF Noise Blanker on and off.
Press this button momentarily to reduce short-duration pulse noise; the “NB” icon will
appear in the display.
Press and hold in this button for one second to reduce longer-duration man-made pulse
noises; the “NB” icon will blink for three seconds, then will appear continuously in the
display.
Press this button again to disable the noise blanker; the “NB” icon will disappear.
53. [AF GAIN] -o- [RF GAIN] Knobs
[AF GAIN] Knob
The inner [AF GAIN] knob sets the receiver’s audio volume level. Typically, you will
operate with this control set between the 9 o’clock and 10 o’clock positions.
[RF GAIN] Knob
The outer [RF GAIN] knob is the receiver’s RF gain control, which adjusts the gain of
the receiver’s RF and IF amplifier stages. This control is normally left in the fully
clockwise position.
54. [RX CLAR] Switch
Pressing this button activates the RX Clarifier, to allow offsetting the receiving
frequency temporarily. Press this button once more to return the receiver to the
original frequency; the Clarifier offset will still be present, though, in case you want to
use it again. To cancel the Clarifier offset, press the [CLEAR] button.
55. [TX CLAR] Switch
Pressing this button activates the TX Clarifier, to allow offsetting the transmit
frequency temporarily. Press this button once more to return the transmitter to the
original frequency; the Clarifier offset will still be present, though, in case you want to
use it again. To cancel the Clarifier offset, press the [CLEAR] button.