Harman Kardon AVR 7200 Service Manual page 129

AVR7200
MITSUMI
· Measurement Procedures (MM1505 ~ MM1508)
Consumption current
Voltage gain
Frequency characteristic
Differential gain
Differential phase
Output dynamic range
Output offset voltage
Cross talk
SW input voltage
MITSUMI
MM1511 ~ MM1512
· Switch Status
Item
Consumption current
Voltage gain
Frequency characteristic
· Measurement Procedures
Consumption current
Voltage gain
Frequency characteristic
Differential gain
Differential phase
Y output dynamic range
C output dynamic range
Connect a DC ammeter to V
I
CC
the ammeter to use.
Input a 2.0V
wave to SG1. If TP1 voltage is V1 and TP3 voltage is V2, find G
G
V
using the following formula:
In the above GV measurement, if TP3 voltage at 7MHz is V3, find fc
fc
as follows:
Input a 2.0V
DG and measure differential gain at TP3.
DP The same as for DG, but measure differential phase.
Input a 100kHz sine wave to SG1. Change the amplitude of the sine
V
D
wave, and measure V
V Measure the DC voltage difference of each switch status at TP2.
OFF
VC1 = 2.1V and VC2 = 0.7V. Input a 2.0V
SG1, and operate SW3. IF TP3 voltage when there is an output
C signal on the OUT pin is V4, and when there is no signal TP3
T
voltage is V5, then find C
Impress an optional DC voltage on TP6 and TP7. Gradually
increase from VC1 = 0V. When TP7 voltage is output on TP2, TP5
V
I
voltage is V
voltage is output on TP2, TP5 voltage is V
Switch status
Symbol
S1 S2
I 2 2
CC
1 2
G
V
2 1
1 2
fc
2 1
Connect a DC ammeter to the V
I
CC1
short the ammeter to use.
Input a 2.0V
G voltage is V1 and TP2 voltage is V2, find G
V
In the above G
fc MM1512) is V3, find fc by the following formula.
Input a 2.0V
DG to SG2, and measure differential gain at TP2.
DP The same as for DG, but measure differential phase.
Input a 100kHz sine wave to SG1. Measure V
V
DY
amplitude under THD 1%, at TP2.
Input an APL 50% luminance signal to SG1 and input a chroma
signal to SG2. Change the chroma signal amplitude and measure
V
DC
V , the maximum amplitude where there is no waveform
DC
distortion at TP2.
Video Switch · 75 driver · Y/C mix MM1501
pin and measure. Hereafter, short
CC
(1.0V for MM1506 and MM1508), 100kHz sine
P-P P-P
G = 20LOG (V2/V1) dB
V
fc = 20LOG (V3/V2) dB
(1.0V for MM1506 and MM1508) staircase to SG1
P-P P-P
APL = 10 ~ 90%
, the maximum amplitude under THD 1%, at TP3.
D
by the following formula:
T
C = 20LOG (V5/V4) dB
T
. Gradually lower from VC1 = V
IH
Video Switch · 75 driver · Y/C mix MM1501
Item
Differential gain
Differential phase
Y output dynamic range
C output dynamic range
pin and measure. Hereafter,
CC
(1.0V for MM1512), 100kHz sine wave to SG1. If TP1
P-P P-P
G = 20LOG (V2/V1) dB
V
measurement, if TP2 voltage at 10MHz (7MHz for
V
fc = 20LOG (V3/V2) dB
(1.0V for MM1512) to SG1, input a chroma signal
P-P P-P
APL = 10 ~ 90%
129
harman/kardon
V
, 4.43MHz sine wave to
P-P
, and when TP6
CC
.
IL
Switch status
Symbol
S1 S2
DG 3 1
DP 3 1
V 2 1
DY
V 3 1
DC
by the following formula:
V
, the maximum
DY