ELECRAFT KX2 - RS232; RTC ADJ; RX EQ; RXSBNUL

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If desired, MENU:RF GAIN can be assigned to PF1-PF4 (pg. 25) for quick access.
Note 1: If you plan to turn AGC off as described above, you should set up the
MENU:AF LIM parameter to avoid painful audio volume on strong signals.
Note 2: RF gain is reset to -0 dB on power-up. Otherwise the operator might not
be aware of a previous gain reduction used under different band conditions.
Note 3: As is the case with many software-defined transceivers, the KX2’s RF
GAIN control is actually an input scaling factor applied within the DSP itself.
Reducing RF gain doesn’t impact the strength of signals seen by the A-to-D
converter (ADC; see glossary, pg. 66). Gain ahead of the ADC can only be reduced
by turning the preamp off, and (if necessary) turning the attenuator on.
RS232
4800 b
This sets the RS232 (or USB) communications rate in bits per second (bps). During
firmware download (via KX2 Utility), the baud rate is set automatically to 38400
baud. It is then restored to the value selected in this menu entry.
RTC ADJ
0
This parameter can be adjusted to improve the long-term accuracy of the real-time
clock on the KXIO2 option. (MENU:KXIO2 must be set to NOR to use the RTC.)
Monitor your clock's accuracy over 24 hours, preferably at your typical ambient
operating temperature. (The KX2 can be turned off during any portion of this
monitor period, as long as an internal battery or external supply is attached.) If it's
off by more than +/- 2 seconds per day, use RTC ADJ to compensate. For example,
if it's slow by 5 seconds per day, set RTC ADJ to "-5 SEC". Allow a few hours,
minimum, before making a further correction.
RX EQ
--------
(+0 dB,
each band)
Receiver audio graphic equalizer. VFO A is used as an 8-band bar graph, showing
boost or cut (- 16 dB to +16 dB in 1 dB increments) for each AF band. The 8
bands are 0.05, 0.1, 0.2, 0.4, 0.8, 1.6, 2.4 and 3.2 kHz. Tap 0 -7 to select an AF
band. VFO A selects boost/cut. Hold CLR to reset all bands to +0 dB.
CW and SSB mode RX EQ are separate. Not applicable to DATA modes.
RXSBNUL
GAIN nnn
Used to null (reject) the receiver’s opposite-sideband image. If the menu name is
RXSBNL*, then an extended per-band calibration procedure has been completed.
Normally this is done at the factory. This procedure requires a 160-10 meter signal
source (such as an Elecraft XG3); instructions are available on our website.