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 ] appears on the display.
( AGC ) key to toggle the AGC recovery time constant among the following
2. Press the
selections:
"AGCauto"
where "AGCauto" represents "AGCfast" on CW and DIG(AFSK), and "AGCslow" on
the voice modes.
If "AGCoff" selected, the S-meter (which monitors AGC voltage) will cease to func-
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, AGC ] appears on the display.
( NB ) key to activate the Noise Blanker. The " " icon will appear at the
2. Press the
right of the "NB" indication.
( NB ) key again to turn the Noise Blanker off.
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, ATT, NAR ] appears on the display.
( IPO ) key to bypass the receiver input preamplifier. The " " icon will
2. Press the
appear at the right of the "IPO" indication.
( IPO ) key once more to re-activate the preamp.
3. Press the
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
R
ECEIVER
UTOMATIC
"AGCfast" "AGCslow"
N
OISE
NTERCEPT
A
G C
AIN ONTROL
knob, as needed, until Operating
"AGCoff"
B
LANKER
knob, as needed, until Operating
P O
OINT PTIMIZATION
knob, as needed, until Operating
CCESSORIES
"AGCauto" ......
25