參數(shù)資料
型號(hào)： UPC1876
廠商： NEC Corp.
英文描述： US MTS DECODER
中文描述： 美國(guó)的多邊貿(mào)易體制解碼器
文件頁(yè)數(shù)： 31/40頁(yè)
文件大?。?/td> 309K
代理商： UPC1876
μ
PC1876
31
Data Sheet S11666EJ4V0DS00
(5/6)
Parameter
SAP single
distortion rate
Cross talk 1
SAP
→
stereo
Cross talk 2
stereo
→
SAP
Total muting level
LED driver
saturation voltage
dbx timing current
Inter-mode DC
offset 1
mute
→
monaural
Inter-mode DC
offset 2
mute
→
stereo
Inter-mode DC
offset 3
mute
→
SAP
Symbol
THD
SAP2
CT
1
CT
2
Mute
V
OSAT
I
T
V
DOF1
V
DOF2
V
DOF3
Measurement
Set FMONO pin to “H” and SAP1/2, ST/SAP, MUTE pins to “L”.
Input SAP signal (100% modulation, f = 1 kHz) to COM pin. Measure output distortion
rate of SOT pin.
(nosie reduction OFF)
Set ST/SAP, FMONO pins to “H” and MUTE pin to “L”.
Input L-only signal (f = 800 Hz, 30% modulation) and SAP signal (f = 3 kHz, 30%
modulation) to COM pin. Assume output voltage of the LOT pin “V
LOT
”.
Connect LOT pin to 3 kHz BPF (gain = 0 dB at f = 3 kHz, –80 dB or more at f = 800 Hz)
to LOT pin. Assume output voltage of BPF “V
LOTCT1
”.
CT
= 20 log V
LOTCT1
V
LOT
Set SAP1/2, ST/SAP pins to “L” and FMONO pin to “H”.
Input L-only signal (f = 3 kHz, 30% modulation) and SAP signal (f = 800 Hz, 30%
modulation) to COM pin. Assume output voltage of the LOT pin “V
LOT
”.
Connect LOT pin to 3 kHz BPF (gain = 0 dB at f = 3 kHz, –80 dB or more at f = 800 Hz)
to LOT pin. Assume output voltage of BPF “V
LOTCT2
”.
CT
= 20 log V
LOTCT2
V
LOT
Set MUTE and FMONO pins to “L”.
Input monaural signal (100% modulation, f = 1 kHz) to COM pin. Assume output voltage
of ROT pin “V
OMO
”.
Set FMONO pin to “H”. Assume output voltage of ROT pin “V
MUTE
”.
Mute = 20 log V
OMO
V
MUTE
Execute the same operation for LOT and NOT pins.
Apply current (10 mA) to SAPL, STL pins, and measure input voltage of the pin.
Input DC voltage (6 V) to STI and WTI pins, and measure current of the pin.
Set FMONO pin to “L”.
Apply DC 1 V to fHSW pin and DC 6 V to SDT pin.
Set MUTE pin to “H”. Assume output voltage of ROT pin “V
MU
”.
Next, input no signal to COM pin to change MUTE pin to “L”. Assume output voltage of
ROT pin “V
MO
”.
V
DOF1
= V
MO
– V
MU
Execute the same operation for LOT pin.
Set ST/SAP, FMONO pins to “H”.
Apply DC 1 V to fHSW pin and DC 6 V to SDT pin.
Set MUTE pin to “H”. Assume output voltage of ROT pin “V
MU
”.
Next, input pilot signal to COM pin to change MUTE pin to “L”. Assume output voltage of
ROT pin “V
ST
”.
V
DOF2
= V
ST
– V
MU
Execute the same operation for LOT pin.
Set FMONO pin to “H” and SAP1/2, ST/SAP pins “L”.
Apply DC 1 V to fHSW pin and DC 6 V to SDT pin.
Set MUTE pin to “H”. Assume output voltage of ROT pin “V
MU
”.
Next, input 5f
H
signal to COM pin to change MUTE pin to “L”. Assume output voltage of
ROT pin “V
SAP
”.
V
DOF3
= V
SAP
– V
MU
Execute the same operation for LOT pin.
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