Vertex Standard FT-817, Руководство пользователя

Страница: 14 / 102

14
Alignment
The alignment procedure for the FT-817 involves several
steps requiring that the case be opened to gain access to
the components to be adjusted. These procedures are de-
scribed first in the pages to follow. A number of align-
ment categories, however, may be accomplished without
opening the transceiver case, utilizing the Alignment
Menu feature which allows adjustments to be accom-
plished using the front panel controls.
Please survey the pages to follow. Depending on the
problem(s) needing correction, you may be able to skip to
the software-based alignment section.
Use external DC input of +13.8 Volts via the rear panel
DC input jack, for all alignment steps.
Local Oscillator Adjustment
Reference Frequency Adjustment
1. Connect the frequency counter to Q1038 (pin 5).
2. Adjust trimmer capacitor TC5001 (on the REF-Unit) for
a reading of 67.875 MHz (±10 Hz) on the frequency
counter.
3. Connect the RF millivoltmeter or an oscilloscope to
J5002 (pin 2) and confirm that the output level is at least
60 mVrms or 169 mVp-p.
PLL Adjustment
VCO VCV Adjustment
Connect the DC voltmeter to J2002 (pin 6) and referring
to the table below, tune the transceiver to each frequency
listed. Then confirm that the correct voltage is present, or
adjust the listed components for the required voltage.
J5002 (Pin 2)
TC5001
Tune to : Adjust / Confirm For
13.895 MHz, CW mode Adjust T2001 4.6 V ±0.2 V
76.000 MHz, CW mode Confirm At least 0.5 V
29.995 MHz, CW mode Adjust T2002 4.2 V ±0.2 V
13.900 MHz, CW mode Confirm At least 0.8 V
53.995 MHz, CW mode Adjust T2003 4.4 V ±0.2 V
88.000 MHz, CW mode Confirm At least 0.8 V
146.000 MHz, CW mode Adjust L2010 3.8 V ±0.2 V
144.000 MHz, CW mode Confirm At least 3.0 V
440.000 MHz, CW mode Adjust L2011 2.4 V ±0.2 V
430.000 MHz, CW mode Confirm At least 1.0 V
T2003
T2002
T2001
L2010
J2002 (Pin 6)
L2011
J2002 (Pin 11)
J2002 (Pin 1)
Q1038 (pin 5)