參數(shù)資料
型號(hào)： UPC1876GT
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)： 22/40頁(yè)
文件大?。?/td> 309K
代理商： UPC1876GT
μ
PC1876
22
Data Sheet S11666EJ4V0DS00
5. ADJUSTMENT PROCEDURE
Precise alignment of the dbx decoder is absolutely critical for optimum performance. Where possible, the alignment
should be performed after the
μ
PC1876 is mounted in the chassis and with the video system active.
5.1 Stereo VCO Adjustment
Perform this adjustment with no signal applied.
(1) Set the STEREO VCO FREE-RUN MONITOR SWITCH pin “H” by connecting it to the V
CC
.
(2) Measure the frequency of the STEREO LED DRIVER/STEREO VCO FREE-RUN MONITOR pin with a frequency
counter, and adjust the variable resistor connected to the STEREO VCO SETTING pin for a measured frequency
of 15.734 kHz
±
50 Hz.
(3) Set the STEREO VCO FREE-RUN MONITOR SWITCH pin unconnected.
5.2 Filter Adjustment
Perform this adjustment with the MATRIX MUTE pin “L” and the STEREO VCO FREE-RUN MONITOR SWITCH
pin unconnected.
(1) Short the capacitor across the PILOT DISCRIMINATION FILTER (PD1 and PD2) pins by connecting these pins
together directly.
(2) Apply a 15.734 kHz sin wave signal to the COMPOSITE SIGNAL INPUT pin at a level greater than 30 mV
r.m.s.
(100 mV
r.m.s.
is recommended).
(3) Adjust the variable resistor connected to the FILTER ADJUSTMENT pin so that the AC output level at the RMS
OFFSET ABSORPTION pin is minimized. This signal is best monitored through a band-pass filter (15.734 kHz).
A recommended circuit is shown in
7. MEASURING CIRCUIT
.
(4) Disconnect the short circuit across the PILOT DISCRIMINATION FILTER (PD1 and PD2) pins after adjustment.
5.3 Separation Adjustment
Perform this adjustment with the MATRIX MUTE pin “L”, the STEREO VCO FREE-RUN MONITOR SWITCH pin
unconnected, and the F-MONAURAL SELECTION pin “H”.
Verify that a L+R signal (100% modulation, 300 Hz, without noise reduction, pilot signal off) results in approximately
150 mV
r.m.s.
at the COMPOSITE SIGNAL INPUT pin, and that a pilot-only signal results in approximately 30 mV
r.m.s.
at the COMPOSITE SIGNAL INPUT pin.
(1) Apply a composite signal (30% modulation, 300 Hz, L-only, with noise reduction) to the COMPOSITE SIGNAL
INPUT pin.
(2) Adjust the variable resistor connected to the WIDE-BAND RMS SETTING pin so that the output at the R CHANNEL
OUTPUT pin is minimized.
(3) Apply a composite signal (30% modulation, 3 kHz, L-only, with noise reduction) to the COMPOSITE SIGNAL
INPUT pin.
(4) Adjust the variable resistor connected to the SPECTRAL RMS SETTING pin so that the output at the R CHANNEL
OUTPUT pin is minimized.
(5) Repeat steps (1) and (2).
Caution Be sure to perform step (5).
相關(guān)PDF資料
PDF描述
UPC1876 US MTS DECODER
UPC2533GS-01 AM TUNER FOR ELECTRONIC TUNING CAR RADIOS
UPC2533GS-02 AM TUNER FOR ELECTRONIC TUNING CAR RADIOS
UPC2533 AM TUNER FOR ELECTRONIC TUNING CAR RADIOS
UPC2539GS DIODE ZENER DUAL ISOLATED 200mW 6Vz 20mA-Izt 0.05 5uA-Ir 3.5 SOT-363 3K/REEL
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPC1883 制造商:Panasonic Industrial Company 功能描述:IC
UPC1883CT 制造商:Panasonic Industrial Company 功能描述:IC
UPC1884 制造商:NEC 制造商全稱:NEC 功能描述:SYNC SIGNAL PROCESSOR FOR MULTI-SYNC DISPLAY
UPC1888FCT 制造商:Renesas Electronics Corporation 功能描述:
UPC1891A 制造商:NEC 制造商全稱:NEC 功能描述:MATRIX SURROUND-SOUND PROCESSOR
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*