SG-2000 MANUAL
149
The SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
©1995, SGC, Inc.
TEL: (206) 746-6310 FAX: (206) 746-6384
VCO 1, 84-114 MHz Oscillator Check
Note: VCO1 covers 2 sub-bands: LO = 84.14 - 97.34 MHz,
HI = 97.34 - 112.34 MHz.
Attach scope to TP401.
Attach voltmeter to TP601 and frequency counter to TP401, use an X1 probe on
the frequency counter.
High VCO Check
Set radio frequency to 29.9999 MHz. The scope should read 1 ±0.5 Vpp.
Adjust L401 for 7.0 volts ± 0.2 VDC.
Set radio frequency to 16 MHz, the frequency counter should read 98.34 MHz.
Low VCO Check
Set radio frequency to 15 MHz, the counter should read 97.34 MHz and the
scope should read 3 ±0.5 Vpp.
Adjust L402 for 7.0 volts ± 0.2 volts on the voltmeter.
Secure L401 and L402 on PCB with a few drops of polystyrene Q-dope.