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)： 18/40頁(yè)
文件大小： 309K
代理商： UPC1876
μ
PC1876
18
Data Sheet S11666EJ4V0DS00
3. EXPLANATION OF EACH FUNCTION
Caution Apply bias voltage to the F-MONAURAL SELECTION pin, the MATRIX MUTE pin, the SAP 1/2 pin and
the STEREO/SAP SWITCH pin. Don’t leave those pins unconnected because those pins are base
open. Loss current is 0.1
μ
A or less.
Mode matrix table is shown in 3.1, and functions of mode switch pins are explained in 3.2 to 3.5.
3.1 Mode Matrix Table
L, R SIGNAL OUTPUT pin matrix table
Broadcasting
mode
Control pin
Output
LED ON/OFF
F-MONAURAL
SELECTION
STEREO/SAP
SWITCH
SAP1/2
SWITCH
L CHANNEL R CHANNEL
OUTPUT
STEREO
LED
SAP
LED
DC
OUTPUT
OUTPUT
Monaural
–
–
–
L + R
OFF
OFF
L
H
–
–
L
R
ON
Stereo
M
–
–
L + R
OFF
OFF
L
L
–
–
ON
H
–
L + R
H
L
H
L + R
SAP
ON
H
Monaural + SAP
L
SAP
OFF
M
–
–
L + R
OFF
L
L
–
–
ON
H
H
–
L
R
H
L
H
L + R
SAP
ON
ON
H
Stereo + SAP
L
SAP
M
–
–
L + R
OFF
OFF
L
L
–
–
ON
ON
H
Remark
When the noise detector detects noise, both the stereo and the SAP demodulation circuit stop.
The noise detector of the
μ
PC1876 detects noise near 180 kHz that is 30 mV
r.m.s.
(TYP.) or higher.
3.2 MATRIX MUTE Pin
The MATRIX MUTE pin controls muting of each output pin at muting operation.
Input signal level of the
MATRIX MUTE
R CHANNEL OUTPUT
L CHANNEL OUTPUT
SAP LED
STEREO LED
H
Mute is ON
OFF
L
Mute is OFF
ON
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