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TB1254N Datasheet(PDF) 35 Page - Toshiba Semiconductor |
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TB1254N Datasheet(HTML) 35 Page - Toshiba Semiconductor |
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35 / 58 page  Ver3.7 00/01/28 35 Note Items/Symbols Bus conditions Measurement methods S5 AF output signal amplitude / vDet(s)5.5M AF output S/N / S/N(s)5.5M Total harmonics distortion / THD5.5M SIF-Freq. :5.5M AUDIO ATT : 127 Others : Preset (1)Input a signal that 5.5[MHz], 100[dB V], 50[kHz] deviated by 400[Hz] sine wave at pin 56. (2)Do same measuring as vDet(s)4.5MH et al. (vDet(s)5.5M, S/N(s)5.5M, THD5.5M). S6 AF output signal amplitude / vDet(s)6.0M AF output S/N / S/N(s)6.0M Total harmonics distortion / THD6.0M SIF-Freq. : 6.0M AUDIO ATT : 127 Others : Preset (1)Input a signal that 6.0[MHz], 100[dB V], 50[kHz] deviated by 400[Hz] sine wave at pin 56. (2)Do same measuring as vDet(s)4.5MH et al. (vDet(s)6.0M, S/N(s)6.0M, THD6.0M). S7 AF output signal amplitude / vDet(s)6.5M AF output S/N / S/N(s)6.5M Total harmonics distortion / THD6.5M SIF-Freq. : 6.5M AUDIO ATT : 127 Others : Preset (1)Input a signal that 6.5[MHz], 100[dB V], 50[kHz] deviated by 400[Hz] sine wave at pin 56. (2)Do same measuring as vDet(s)4.5MH et al. (vDet(s)6.5M, S/N(s)6.5M, THD6.5M). S8 Demodulation band width of the FM demodulator / fpH(s)1 / fpL(s)1 SIF-Freq. : 4.5M AUDIO ATT : 127 Others : Preset (1)Input a signal that 4.5[MHz], 100[dB V], 25[kHz] deviated by 400[Hz] sine wave at pin 56. (2)Measure the amplitude at pin 4(vo#4 [Vp-p]). (3)Increase the input signal frequency, measure the input signal frequency at which the output amplitude at pin 4 turn to be - 3[dB] against “vo#4” (fpH(s)1[MHz]) (4)Decrease the input signal frequency, measure the input signal frequency at which the output amplitude at pin 4 turn to be - 3[dB] against “vo#4” (fpL(s)1[MHz]) S9 Demodulation band width of the FM demodulator / fpH(s)2 / fpL(s)2 SIF-Freq. : 5.5M AUDIO ATT : 127 Others : Preset (1)Input a signal that 5.5[MHz], 100[dB V], 50[kHz] deviated by 400[Hz] sine wave at pin 56. (2)Measure the amplitude at pin 4(vo#4 [Vp-p]). (3)Increase the input signal frequency, measure the input signal frequency at which the output amplitude at pin 4 turn to be - 3[dB] against “vo#4” (fpH(s)2[MHz]) (4)Decrease the input signal frequency, measure the input signal frequency at which the output amplitude at pin 4 turn to be - 3[dB] against “vo#4” (fpL(s)2[MHz]) S10 Audio attenuater gain / G att max / G att mid / G att min AUDIO-SW : 1 AUDIO ATT : 0/64/127 Others : Preset (1) Input a 400[Hz], 927[mVrms] sine wave at pin 53. (2) Set the “AUDIO ATT” data to “127”. (3) Measure the amplitude at pin 4 (v#4max[mVrms]). (4) G att max[dB] = 20log(v#4max/927) (5) Set the “AUDIO ATT” data to “64”. (6) Measure the amplitude at pin 4 (v#4mid[mVrms]). (7) G att mid[dB] = 20log(v#4mid/927) (8) Set the “AUDIO ATT” data to “0”. (9) Measure the amplitude at pin 4 (v#4min[mVrms]). (10) G att min[dB] = 20log(v#4min/927) S11 Audio attenuater off- set / Vos att AUDIO-SW : 1 AUDIO ATT : 0/127 Other : Preset (1) Connect pin 53 to GND through a 4.7[ F] capacitor. (2) Set the “AUDIO ATT” data to “127”. (3) Measure the DC voltage at pin 4 (V#4max[mV]). (4) Set the “AUDIO ATT” data to “0”. (5) Measure the DC voltage at pin 4 (V#4min[mV]). (6) Vos[mV] = V#4min-V#4max |
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Similar Description - TB1254N |
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