VCO & Osc

Test Equipment
1. Frequency Counter
2. Digital Volt Meter
3. DC Power Supply (13.8V 3A)

1.	Mic: Receive, Channel Selector: Ch1, Delta Tune: Center	Connect frequency counter to pin 4 of IC 1,	CT1	Adjust CT1 to get 10.240 MHz
2	Same as step 1	Connect digital volt meter to pin 7 of IC 1	T106	Adjust T106 to get 1.3V at Ch1 and 2.0V at Ch40
3.	Mic: Transmit, Channel Selector: Ch40	Connect frequency counter to pin 4 of IC 1	RV5	Adjust RV5 to get 10.240 MHz
4.	Same as step 3	Connect frequency counter to the point where CT3 & X2 are connected	CT3	Adjust CT3 to get 10.695 MHz in Tx mode

Test Equipment
1.�� RE Power Meter
2.�� 50 ohm Dummy Load
3.�� Oscilloscope
4.�� Audio Generator
5.�� DC Power Supply (13.8V 3A)
6.�� Spectrum Analyzer
7.�� RE Attenuator
8.�� Frequency Counter
9.�� Coupler

Test Equipment Setup
1.�� Connect audio generator output terminal to pin 2 of Mic jack and connect pin 3 to ground.
2.�� Connect RF power meter to antenna jack.
3.�� Connect coupler to RE power meter.
4.�� Connect 50 ohm dummy load, oscilloscope and frequency counter to coupler.
5.�� Connect power cord to power supply.

Alignment Procedure
1.�� Mic: Transmit, Channel Selector: 19
2.�� Adjust T108,T109,T1 10,L7,and L11-B for max. power output.
3.�� Check output on Ch1 & Ch40, if power is not equal readjust L7, and L11-B.
4.�� Adjust RV7 so that output indicator meter is at the 4 watt position.
5.�� Check that frequency tolerance is plus or minus 400 Hz, if not go back to steps 1-3.
6.�� Remove 50 ohm dummy load from antenna jack.
7.�� Connect RF attenuator and spectrum analyzer to antenna jack.
8.�� Check that harmonics and spurious are suppressed more than -63dB on all channels with no modulation if it is not within the above range adjust L7, and L11-B (harmonics).
9.�� Turn on the audio generator and adjust audio level to obtain 80-100% modulation (3mV). Adjust RV2 to obtain 95% modulation.

Disclaimer: Although the greatest care has been taken while compiling these documents,