QRPGuys Pacificon KD1JV, Руководство пользователя

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Page 12 of 19 pacificon_assy_041621.pdf
5 – Calibration:
 A 5 second push of the Encoder actives Calibration mode
 Release the Encoder when [CAL ] is displayed.
 The VFO reference oscillator can now be tuned with the encoder to calibrate
the frequency.
 This can be done in one of two ways.
1. Use a frequency counter at the LO test point.
1. Tune to match the frequency which was on the display when CAL was
entered. A frequency ending in 100.00 is a good one to choose.
2. Zero beat an AM SWBC station. To use a broadcast station, you need to first
tune it in, knowing they are on exact 5 kHz frequencies. Since you are
slightly off frequency, the audio will be wobbly. Active the Calibration mode
and tune the VFO until the wobble in the audio goes away. A scope will help
with this and get you closer then you can just by ear. You may not get the
frequencies to exactly match, but you can get pretty close.
6 – EEPROM erase:
 A 8 second push of the Encoder will erase the data in the EEPROM which
clears VFO calibration. This is included in case the EEPROM data gets
corrupted or you wish to change filters to a different band.
 Unless you really want to do this, best not to push the Encoder too long!
 Release the Encoder when the display reads [e-rAS]
 Once the Encoder is release the display will read [donE] and a beep will
sound.
 Power needs to be cycled to restart with factory values.
Low – Wide switch:
In the [Low] position an audio low pass filter with a roll off starting at 1 kHz is
switched in. This will reduce the high frequency background noise and is primarily
used in CW, but can be helpful in voice reception despite the reduction in fidelity.
When the LPF is enabled, very strong signals will cause motor-boating type
oscillations if the volume is turned up high. Simply turn down the volume to fix
this. This does not seem to be a problem in wide band mode.
It's good practice to leave the volume control set about midway when tuning
around and only turn it up to full when needed. Since there is no AGC, keeping
the volume low when using headphones will save your hearing.
CW – DSB mode switch:
This switch sets the transmit mode to either CW or DSB.
The switch must be in the DSB position for voice operation. When in the CW
position, a carrier (CW) signal will be transmitted. However, there will be no side
tone. Use this as a Tune mode if you need to adjust an antenna tuner.