參數(shù)資料
型號: MSM7584C
廠商: OKI SEMICONDUCTOR CO., LTD.
英文描述: π/4 Shift QPSK MODEM(π/4移動(dòng)QPSK調(diào)制解調(diào)器/ADPCM編碼譯碼器)
中文描述: π/ 4移位的QPSK調(diào)制解調(diào)器(π/ 4移動(dòng)的QPSK調(diào)制解調(diào)器/差分PcM編碼譯碼器)
文件頁數(shù): 13/57頁
文件大?。?/td> 321K
代理商: MSM7584C
Semiconductor
MSM7584C
13/57
BSTO
BSTO is the modulator side burst output position specification signal.
The burst time and position of the I and Q analog output including the lamp bits are output. (Refer
to Fig. 3)
I+, I–
Quadrature modulation signal I Component differential analog output.
Their output levels are 500 mV
PP
(maximum) with 1.6 Vdc as the center value. The output pin
load conditions are: R
10 k
W
, C
20 pF. The gain of these pins can be adjusted using the control
register CR15 - B7 to B4, and the offset voltage at the I– pin can be adjusted using CR16 - B7 to
B3.
Q+, Q–
Quadrature modulation signal Q component differential analog outputs.
Their output levels are 500 mV
PP
(maximum) with 1.6 Vdc as the center value. The output pin
load conditions are: R
10 k
W
, C
20 pF. The gain of these pins can be adjusted using the control
register CR15 - B7 to B4, and the offset voltage at the Q– pin can be adjusted by using CR17 - B7
to B3.
SGM
MODEM internal reference voltage output.
The output voltage value is approximately 2.0 V. Insert a bypass capacitor of approximately 0.1
m
F between this pin and the AGM pin.
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