Config menu – Elecraft K3 Owner's Manual User Manual

Page 53

CONFIG Menu

Tech Mode Entries

Menu entries that include [T] are tech mode entries. These are only visible if CONFIG:TECH MD is set to

They are normally left at their defaults. Entries further described as “Advanced” or “Troubleshooting” should
be changed with caution. The default values are strongly recommended for these functions; tap

D IS P

to see the

default value, which appears in parentheses at the start of the help text.

Sub Receiver Settings

Menu entries marked

SUB

have two settings: one for the main receiver, and one for the sub receiver. If a sub

receiver is installed, the menu entries will change to identify which receiver is being set up by showing

(main receiver) or

SUB

(sub receiver) at the left end of the parameter display. Also, in the

SUB

case, the

SUB

icon will flash.

Prior to adjusting sub receiver menu parameters, you should turn the sub receiver on by tapping

S U B

. This is

especially important if you’re adjusting crystal filter settings, because it will allow you to hear the changes as
filters are selected and modified. You should also turn SUB AF gain up and main AF gain down.

Even if the sub receiver is turned on, when you first enter the menu,

will be in effect, and the

SUB

icon will

be turned off. Tap

S U B

to switch to the sub receiver parameter as required.

Entry

Default

Description

2 TONE [T]

OFF

(Troubleshooting.) Enables built-in 2-tone generator for SSB transmit tests. The
internal 2-tone generator only works if LSB or USB mode is selected. After
setting 2-tone ON, exit the menu and tap XMIT. You can use

M IC

to adjust

the amplitude of one of the tones; the other’s amplitude is fixed.

ADC REF [T]

5.00

Allows calibration of the voltage reference used by the K3 to measure and display
certain values, such as the rig’s supply voltage. (Optional.) First, disconnect
anything attached to the ACC jack. Next, locate the ADC REF menu entry. It will
initially show 5.00 volts as the reference voltage. Using a DMM set to DC volts,
measure the actual voltage at pin 2 of the ACC jack. This must be done while the
ADC REF parameter is being displayed. (Note: The (-) probe of the DMM
should go to the K3’s chassis ground, e.g. at the GROUND lug.) Finally, use VFO
A to set the ADC REF menu parameter to what you measured at pin 2.

AF GAIN

Sets AF gain range. Available selections are

AFSK TX

FIL OFF

If set to

FIL ON

, a 400-Hz transmit audio filter is added (via DSP) in order to

maximize transmit signal to noise ratio. This may be useful in high-noise
computer environments. Applies only to AFSK-A mode (RTTY).

AF LIM

NOR

(Advanced.) Adjustable AF output limiter for use when AGC is turned off. This
can protect your ears if a large signal appears. Signals or noise above the
threshold will sound highly distorted due to the limiting action, reminding you to
back down the AF or RF gain. Typical settings for those who often turn AGC off
are 17 to 23; some experimentation will be required.

AFV TIM [T]

1000

(Advanced.) Integration time for

AFV

and

dBV

displays in ms. See VFO B

alternate display information (pg. 36).