M61110FP/GP

Rev.2.0, Mar.12.2004, page 10 of 19

11. Inter modulation: IM

1. Input SG11 to VIF IN, and measure video output TP9 with an oscilloscope.

2. Adjust AGC filter voltage V8 so that the minimum DC level of the output waveform is 1.5V.

3. At that time, measure TP1A with a spectrum analyzer .

The inter modulation is defined as a difference between 0.92MHz and 3.58 MHz frequency components.

12. Limiting Sensitivity: LIM

1. Input SG17 to LIM IN, and measure the 400Hz component level of AF output TP14.

2. Input SG20 to LIM IN, and measure the noise level of AF output TP14 .

3. The input limiting sensitivity is defined as the input level when the difference between each 400Hz components

of audio output (TP14) is 30dB, as shown below.

30dB

Audio output while SG17 is input.

(dB

µ)

(mVrms)

Audio Output

Audio output while SG20 is input.

LIM Input level

13. AM Rejection: AMR

1. Input SG18 to LIM IN, and measure the output level of Audio output (TP14).

This level is named VAM.

2. AMR is;

VoAF (mVrms)

AMR = 20log

VAM (mVrms)

[dB]

14. AF S/N: AF S/N

1. Input SG19 to LIM IN, and measure the output noise level of Audio output (TP14).

This level is named VN.

2. S/N is;

VoAF (mVrms)

S/N = 20log

VN (mVrms)

[dB]