Waveform W5: Abacus/Adsic Interface; Waveform W6: Spi Bus Programming Adsic - Motorola ASTRO Digital Spectra Plus Detailed Service Manual

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Waveform W5: ABACUS/ADSIC Interface

Waveform W6: SPI Bus Programming ADSIC

September 5, 2008
34513 Acquisitions
Tek stopped:
T
T
1
2
3
Ch1 2.00V Ch2 500mV
Ch3 500mV
W5: ABACUS/ADSIC Interface.
Receiving 1KHz tone @ 3KHz deviation,
-60dbm.
Trace 1 -IDC (2.4MHz)
Trace 2 - DOUT
TRACE 3 - DOUT*
Note 2: Since these signals are a differential
current loop these voltages are very low.
18 Acquisitions
Tek stopped: Tek stopped:
T
T
1 1
2 1
T
T
3 1
Ch2 Ch1
Ch1 5.00V
5.00V
Ch3 5.00V
W6: SPI Bus Programming ADSIC.
Trace 1 - ADSIC_SEL*
Trace 2 - SPI_SCK
Trace 3 - MOSI
Note: These waveforms are typical to
any device on the SPI bus.
Troubleshooting Waveforms: ASTRO Digital Spectra Waveforms
M 5.00us Ch1 2.2 V
2
T
T T
M 50ns Ch1 2.2 V
MAEPF-24381-O
Ch1 Freq
2.251920 MHz
Low resolution
MAEPF-24380-O
Ch1 Freq
= Hz
No period
found
6881076C25-E