RF Technology Eclipse Series Instruções de Operação descarregar pdf (Página 16)

Page 16 RF Technology R350/R500

6 ALIGNMENT PROCEDURE 6.3 IF Alignment

Step Input Measure Adjust

1 Select alignment

frequency channel

dc Volts on test socket

pin 9 to pin 1

L34 to read 4.00Vdc

2 Signal generator on

centre frequency

channel to J1.

Modulation off.

dc Volts on test socket

pin 7 to pin 1

Generator level to

read 1 - 2 Vdc

3 As Above As Above L29, L31, L36, L38

for maximum reading.

Reduce generator

output to keep below

2 Vdc

6.3 IF Alignment

Step Input Measure Adjust

1 Signal generator on

center frequency

channel to J1.

Modulation OFF

dc Volts in test socket

pin 7 to pin 1

Generator level to

read 1 - 2 Vdc

2 As Above As Above L5, L6, L7, L8 for

maximum reading.

Reduce generator

output to keep below

2 Vdc

3 Set generator level to

10 µV

Frequency U3 pin 9 L9 to read 455 KHz

+/- 10Hz

4 Set generator level to

1 millivolt.

Modulation ON.

Audio level test socket

pin 6 to pin 1

Line level (RV3) to

obtain approx.1Vrms

5 As Above As Above L10 for maximum

6 As Above Audio level P1 pin 18

to pin 5

RV1 for 0.5 Vrms

7 Set generator level to

approx. 25µV

SINAD on test socket

pin 6 to pin 1

Reduce generator

level to obtain 12 Db

SINAD. Carefully

adjust L5, L6, L7, L8

to obtain the best

SINAD. Reduce

generator output to

maintain 12 dB

SINAD

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 26 27

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RF Technology Eclipse Series Instruções de Operação Página 16

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