KSI-W020-000

6

Information in using IC(Continued)

Reference Circuit: -15dB

Changing Circuit : -4dB

If the RF stage is double-tuned, the difference in sensitivity within the RF band almost

disappears. thereby leading to worse spurious characteristic.

8. The SL1019P contains 2-channel wide-band AGC.

The pin 6 detects and undesired signal within the RF band

and wide-band AGC is applied. This detection sensitivity is

determined inside the IC. The pin 2 detects and undesired

signal outside the RF band. This detection sensitivity is

to pin 2, AGC operates.

9. In the AGC circuit of the test circuit the presence of an

undesired signal of high strength within the receiving band

may cause the desired signal to be suppressed when the

desired signal is low or medium in strength. Shown below is

the circuit configuration where the necessary measures are taken against this

suppression.

10.The circuit shown below is available to stabilize the transient response of the signal

meter output at the search stop mode.

11. When using MW, no additional resistor is required

But when using LW(approximately 50℃ or greater), additionally connect a resistor of

27KΩ across pins 18 and 19 against increase in local OSC level.

12. For improvement in image frequency interference change the RF double tuning coil

point of the tuning circuit must not be decreased with tuning resistor 100KΩ )

Vc c

Wi d e

Be n d

AG C

ANT

Da mp i n g

Dr i v e r

Ge

Vr e f

2

6

1

4

16

Si g n a l

16M et er O ut p u t

Wi d e Be n d

AF C I n p u t

RF A GC

ANT D a mp i n g

+

13

+

17

10K

1K

S i g n al d u r i n g s e ar c h i n g

fr o m P LL

RF A G C

SL1019P