Agc (Automatic Gain Control); Noise Blanker; Ipo (Intercept Point Optimization) - Yaesu FT-817ND Operating Manual

AGC ( A
The receiver recovery time constant of the AGC system may be modified to match your
operating needs.
1. Press the key momentarily, then rotate the
Function Row 8 [ NB
( AGC AGC ) key to toggle the AGC recovery time constant among the follow-
2. Press the
AGC AGC
AGC
ing selections:
"AGCauto AGCauto"  "AGCfast
AGCauto AGCauto AGCauto
where "AGCauto AGCauto" represents "AGCfast
AGCauto AGCauto
AGCauto
the voice modes.
AGCoff AGCoff" selected, the S-meter (which monitors AGC voltage) will cease to func- AGCoff AGCoff
If "AGCoff
tion.
The IF Noise Blanker may be useful in reducing or eliminating some types of impulse
noise, especially noise generated by automotive ignition systems.
1. Press the key momentarily, then rotate the
Function Row 8 [ NB
( NB NB ) key to activate the Noise Blanker. The "" icon will appear at the
2. Press the
NB NB
NB
right of the "NB NB" indication.
NB NB NB
( NB
3. Press the
IPO ( I
The IPO feature bypasses the receiver RF preamplifier, thereby eliminating the preamp's
gain. This feature is not available on the 144 MHz and 430 MHz.
1. Press the key momentarily, then rotate the
Function Row 7 [ IPO
( IPO IPO ) key to bypass the receiver input preamplifier. The "" icon will
2. Press the
IPO IPO
appear at the right of the "IPO
( IPO IPO ) key once more to re-activate the preamp.
3. Press the
IPO IPO
IPO
On the bands below 14 MHz, the input preamplifier is rarely necessary, and acti-
vation of the IPO feature will provide substantial protection against intermodulation
and other problems associated with strong signal input to the receiver. Rule of thumb: so
long as the S-meter is moving on background noise, additional front-end gain is not
necessary.
FT-817 Operating Manual
ND
R
UTOMATIC
AGC ] appears on the display.
NB, AGC NB NB AGC AGC
NB AGC
AGCfast"  "AGCslow AGCslow"  "AGCoff
AGCfast AGCfast AGCfast AGCslow AGCslow AGCslow
AGCfast" on CW and DIG(AFSK), and "AGCslow
AGCfast AGCfast
AGCfast
N
OISE
AGC ] appears on the display.
NB NB AGC AGC
NB NB, AGC AGC
NB ) key again to turn the Noise Blanker off.
NB NB
NB
NTERCEPT
NAR ] appears on the display.
IPO, ATT IPO IPO ATT ATT ATT, NAR NAR NAR
IPO ATT NAR
IPO
IPO" indication.
IPO IPO
IPO
ECEIVER
G C
AIN
knob, as needed, until Operating
AGCoff"  "AGCauto
AGCoff AGCoff AGCoff
B
LANKER
knob, as needed, until Operating
P O
OINT PTIMIZATION
knob, as needed, until Operating
A
CCESSORIES
)
ONTROL
AGCauto" ......
AGCauto AGCauto AGCauto
AGCslow" on
AGCslow AGCslow
AGCslow
)
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