SGC SG-2020 TEST DOCUMENT Test Manual page 6

5.8 Continue on through step A
VCXO ADJ. USB
LSB
CW
5.8.1 Adjust display for 3200.
5.8.2 Adjust C146 for maximum amplitude on scope at TP6.
5.8.3 Adjust T6 for maximum amplitude.
5.8.4 Readjust C146 until the frequency counter is within 100 Hz of the BFO
crystal sort value.
BFO ADJ. USB
LSB
CW
LO ADJ. USB
LSB
CW
LED Test
5.9 After completion of step A, press 'MEM' and the display should step
through the LED cycle test. Check that all LED's are functional,
and that no LED is tied to another.
Display Calibration
5.10 Connect frequency counter to audio output (J7 at rear of radio)
5.11 Place radio at these settings:
A. Display to 1.850 MHz
B. Mode to USB
C. BW to 2.7 KHz
5.12 Inject a 1.851-MHz, 3-uV signal and observe that the frequency counter
reads 1,000Hz +/- 10Hz. Adjust the spinner knob if necessary to achieve
1,000Hz +/- 10Hz. Note: Skip step 5.13 if adjustment is not necessary.
5.13 Press CMD + XCVE and verify that the XCVE, RIT, and SPLIT LEDs
light. Adjust spinner until display reads 1.850 MHz. Press MEM.
.
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
P.O.Box 3526, 98009 Fax: 425-746-6384 or 746-7173 Tel: 425- 746-6310 or 1-800-259 7331
Ref. Point Step
LO TP5
BFO TP6
LO TP5
5.14 Change the mode to LSB and the signal generator to
1.849 MHz.
5.15 Verify that the frequency counter reads 1,000 Hz
plus or minus 100Hz.
E-mail: sgc@sgcworld.com Web site: http://www.sgcworld.com
Adj. Tuning Knob for:
1 61,656.269 KHz
2 61,666.294 KHz
3 61,663.157 KHz
5 See page 12
6 See page 12
7 See page 12
8 See page 12
9 See page 12
A See page 12
6
© 2001 SGC Inc