M52760 Mitsubishi, M52760 Datasheet - Page 4

• Manufacturer Part Number: M52760
• Description: PLL-SPLIT VIF/SIF IC
• Manufacturer: Mitsubishi

ELECTRICAL CHARACTERISTICS TEST METHOD
Video S/N
Input SG2 into VIF IN and measure the video out (Pin 18) noise in
r.m.s at TP18B through a 5MHz (-3dB) L.P.F.
BW Video band width
1. Measure the 1MHz component level of EQ output TP18A with a
2. Reduce F2 and measure the value of (f2-f0) when the (f2-f0)
VIN MIN Input sensitivity
Input SG4 (Vi=90dB ) into VIF IN, and then gradually reduce Vi and
measure the input level when the 20kHz component of EQ output
TP18A reaches -3dB from Vo det level.
VIN MAX Maximum allowable input
1. Input SG5 (Vi=90dB ) into VIF IN, and measure the level of the
2. Gradually increase the Vi of SG and measure the input level
GR AGC control range
-3dB
spectrum analyzer when SG3 (f2=57.75MHz) is input into VIF
IN. At that time, measure the voltage at TP8 with SW8, set to
position 2, and then fix V8 at that voltage.
component level reaches -3dB from the 1MHz component level
as shown below.
20kHz component of EQ output.
when the output reaches -3dB.
TP18
GR=VIN MAX-VIN MIN (dB)
1MHz
S/N=20 log
0.7 Vo det
NOISE
BW
(dB)
( f2 - f0 )
V3 RF AGC operating voltage
Input SG8 into VIF IN, and gradually reduce Vi and then measure
the input level when RF AGC output TP3 reaches 1/2 V
shown below.
CL-U Capture range
1. Increase the frequency of SG9 until the VCO is out of locked-
2. Decrease the frequency of SG9 and measure the frequency fU
CL-L Capture range
1. Decrease the frequency of SG9 until the VCO is out of locked-
2. Increase the frequency of SG9 and measure the frequency fL
CL-T Capture range
VCO f VCO SW on drift
1. Input SG2 into VIF IN .
2. Adjust the VCO coil so that AFT voltage can be reached to 1/2
3. IF AGC FILTER (Pin8) is connected to GND (0V) after turning off
4. And then, measure each free running frequencies of 10 and 60
oscillation.
when the VCO locks.
oscillation.
when the VCO locks.
Vcc in 10 seconds after the power switch is turned to on.
the VIF input.
seconds later.
TP3
Voltage
CL-T=CL-U+CL-L (MHz)
VCO f (kHz) = frequency2 (60 sec. later)
1/2V
CL-U=fU-58.75 (MHz)
CL-L=58.75-fL (MHz)
CC
V
3H
-frequency1 (10 sec. later)
Vi
PLL-SPLIT VIF/SIF IC
MITSUBISHI ICs (TV)
M52760SP
Vi (dB )
V
3L
CC
, as
4