Realistic TRC453
Documentation Project

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PLL Alignment Procedure

Refer to ALIGNMENT POINTS

Test Equipment required
a. Oscilloscope (DC - 50 MHz)
b. Frequency Counter (0 - 30 MHz)
c. DC Power Supply d. 50 ohm Load

STEP

SETTINGS

CONNECTION

ADJUST

ADJUST FOR

1

CH: 40,
AM, RX
Clarifier in center

Connect scope to TP2

L13

Adjust for 4.5V DC reading on Oscilloscope.
(Oscilloscope in DC mode)

2

Same as step 1.
CH: 1.

Connect scope to TP2

 

Check that the voltage is more than 2V DC on Oscilloscope.

3

Same as step 1.
CH:19
USB, RX

Connect scope to TP3

L14

Adjust for maximum reading on Oscilloscope.

4

Same as step 3.

Connect Frequency counter to TP3

L16

Adjust for 16.4925 MHz ±20 Hz.

5

Same as step 1.
CH: 19
AM, RX

Same as step 4.

L15

Adjust for 16.4900 MHz ±20 Hz.

6.

Same as step 1  
CH: 19
LSB, RX.

Same as step 5.

L17

Adjust for 16.4875 MHz ±20 Hz.

7.

Same as step 1
CH: 19
LSB, TX

Same as step 6.

VR3

Adjust fur 16.4875 MHz ±20 Hz.

8.

Same as step 1.
CH: 19
LSB, RX

Connect Frequency counterTP5

L20

Adjust for 10.6925 MHz ±20 Hz.

9.

Same as step 1
CH: 19
USB, RX

Same as step 8

L19

Adjust for 10.6975 MHz ±20 Hz.

10.

Same as step 1.
CH: 19,
TX, AM.
Disconnect TP6, TP7, TP8

Connect Frequency counter TP9

L18

Adjust for 10.6950 MHz ±5 Hz.

 


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