V26.V27. VCO Maximum variable range (U, L) . . [dfu, dfl]

(1) Apply the VCC voltage to the external AGC, IF AGC (pin 17).

(2) Pick up the VCO oscillation frequency from the VIDEO output (A), GND, etc. and adjust the VCO coil so coil

that the frequency becomes 38.9MHz.

(3) fl is taken as the frequency when 1V is applied to the APC pin (pin 9). In the same manner,

fu is taken as the frequency when 5V is applied to the APC pin (pin 9).

dfu = fu - 38.9MHz

dfl = fl - 38.9MHz

V28. VCO control sensitivity. . . . . . . . . . . . . . . . . [

β]

(1) Apply the VCC voltage to the external AGC, IF AGC (pin 17).

(2) Pick up the VCO oscillation frequency from the VIDEO output (A), GND, etc. and adjust the VCO coil so that

the frequency becomes 38.9MHz.

(3) f1 is taken as the frequency when 3.0V applied to the APC pin (pin 9). In the same manner,

f2 is taken as the frequency when 3.4V is applied to the APC pin (pin 9).

F1. First SIF conversion gain . . . . . . . . . . . . . . . . [VG]

(1) Internal AGC

(2) fp = 38.9MHz CW; 10mV (VIF input)

fs = 33.4MHz CW; 500

µV (First SIF input) . . . . V1

(3) Detection output level at test point C (Vrms) . . . . V2 (5.5MHz)

(4)

F2. 5.5MHz output level. . . . . . . . . . . . . . . . . . . . . [SO]

(1) Internal AGC

(2) fp = 38.9MHz CW; 10mV (VIF input)

fs = 33.4MHz CW; 10mV (First SIF input) . . . . . . . . . . . . . . . . . V1

(3) Detection output level at test point C (5.5MHz) . . . . . . . . . . . . . . SO(mVrms)

F3. 1st SIF maximum input . . . . . . . . . . . . . . . . . . [Si max]

(1) Internal AGC

(2) fp = 38.9MHz CW; 10mV (VIF input)

fs = 33.4MHz CW; variable (First SIF input)

(3) Input level at which the detection output at test point C (5.5MHz) becomes So

±2dB......Si max

F4. F5. First SIF input resistance, input capacitance . . . . [Ri(SIF1), Ci(SIF1)]

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

No.7779-9/21

LA7567EV

(

)

mV

kHz

400

f1

f2

β

–

=

dB

V1

V2

20log

VG =