LA75694M

No.A0251-9/10

F1. 1st SIF conversion gain [VG]

(1) Internal AGC

(2) fp = 45.75MHz CW; 10mV (VIF input)

fs = 41.25MHz CW; 500

µV (1st SIF input) ····· V1

(3) Detection output level at test point C (Vrms) ····· V2 (4.5MHz)

(4) VG = 20log

dB

F2. 4.5MHz output level [SO]

(1) Internal AGC

(2) fp = 45.75MHz CW; 10mV (VIF input)

fs = 41.25MHz CW; 10mV (1st SIF input) ····· V1

(3) Detection output level at test point C (4.5MHz) ····· SO (mVrms)

F3. 1st SIF maximum input [Si max]

(1) Internal AGC

(2) fp = 45.75MHz CW; 10mV (VIF input)

fs = 41.25MHz CW; variable (1st SIF input)

(3) Input level at which the detection output at test point C (4.5MHz) becomes SO ±2dB. ····· Si max

F4.F5. 1st SIF input resistance, Input capacitance [Ri (SIF), Ci (SIF)]

(1) Using an input analyzer, measure Ri and Ci in the input impedance measuring circuit.

C1. Converter conversion gain [VG (SIF)]

(1) Internal AGC

(2) fp = 45.75MHz CW; 10mV (VIF input)

fs = 41.25MHz CW; 316

µV (1st SIF input)

(3) Measure the 6MHz component at test point E (MIX output) ····· V1

(4) Measure the 4.5MHz component at test point F (NICAM output). ····· V2

(5) VG(SIF) = 20log

dB

C2. SIF converter maximum output level [V max]

(1) Internal AGC

(2) fp = 45.75MHz CW; 10mV (VIF input)

fs = 41.25MHz CW; 10mV (1st SIF input)

(3) Measure the 6MHz component at test point E (MIX output). ····· V max (dB

µV)

C3. Carrier suppression ratio [VGR (4.5)]

(1) Internal AGC

(2) fp = 45.75MHz CW; 10mV (VIF input)

fs = 41.25MHz CW; 316

µV (1st SIF input)

(3) Measure the 6MHz component at test point E (MIX output). ····· V6 (dBµV)

(4) Measure the 4.5MHz component at test point E (MIX output). ····· V4.5 (dBµV)

(5) Perform the following calculation.

Carrier suppression ratio VGR (4.5) (dB) = V6 – V4.5

C5. OSC leakage [OSC leak]

(1) Internal AGC

(2) fp = 45.75MHz CW; 10mV (VIF input)

fs = 41.25MHz CW; 316

µV (1st SIF input)

(3) Measure the 6MHz component at test point E (MIX output). ····· V6 (dBµV)

(4) Measure the 500kHz component at test point E (MIX output). ····· V0.5 (dBµV)

(5) Perform the following calculation.

Carrier suppression ratio OSC leak (dB) = V6 – V0.5

V2

V1

V1

V2