Lab599 Discovery TX-500, Руководство пользователя

Страница: 16 / 32

To use split, first tap
N>
A->B
to set VFO B to the same mode, frequency, and filter
settings as VFO A. Then tune VFO B up about 2 kHz. Finally, tap
N>
SPL
(the
J
icon
will turn on). VFO B is now controlling your transmit frequency.
This is where the
A<>B
switch comes in: it reverses the A and B VFOs so that you’re
temporarily receiving on your transmit frequency. During this time, tune VFO A around a bit to
see if you can identify who is presently working the DX station, then position yourself just above
this frequency. With any luck your next transmission will occur right where he’s listening.
XIT as an alternative to split: If you’re trying to preserve VFO B as a holding register tuned
someplace else in the band, you may want to use XIT rather than split in the above situation.
In this example, you’d turn on XIT and rotate the offset control to about +2.00 kHz. You’ll
then be transmitting 2 kHz above VFO A. To do the equivalent of A<>B, you can briefly turn
RIT on as well. Turn off RIT to listen to the DX station.
RECEIVE AUDIO EQUALIZATION (RX EQ)
The TX-500 provides 3 bands of receive audio equalization via the
F> 18 EQL > RX
menu entry. EQ RX can compensate for physical acoustics (of the room, headphones,
internal speaker, external speaker), tailoring the audio to your personal preference.
TRANSMIT AUDIO EQUALIZATION (TX EQ)
Most microphones, including the TX-500, will provide good audio quality with little or
no EQ TX. High settings can cause distortion.
If required, transmit audio equalization can compensate for microphone and voice
variations.
F> 18 EQL > TX
works exactly the same as EQ RX, and can be used during transmit.
EQ TX is not applicable to CW. While adjusting EQ TX, monitor your voice using
headphones (use
N>
MON
to set the level), or listen to your transmitted signal on another
receiver. If you hear distortion, reduce all EQ TX bands. You may also have excessive mic
gain or compression.
Do not use the hand speaker-mic at the same time as monitor
F
function
in voice modes:
A B F G
CROSS-MODE OPERATION
,
(CW-in-SSB) Cross-mode operation is possible in some cases. For example, you could set
up VFO A for SSB receive, and VFO B for CW transmit, then enter
N>
SPL
.
!
!
Advanced Operations
16
SPL