Motorola ASTRO Digital Spectra Plus - Waveform W5: ABACUS;ADSIC Interface; Waveform W6: SPI Bus Programming ADSIC

September 5, 2008 6881076C25-E
6-4 Troubleshooting Waveforms: ASTRO Digital Spectra Waveforms
Waveform W5: ABACUS/ADSIC Interface
Waveform W6: SPI Bus Programming ADSIC
34513 Acquisitions
Tek stopped:
T
3
Ch3
1
2
Ch1 Ch2
M 5.00us Ch1 2.2 V
Note 2: Since these signals are a differential
current loop these voltages are very low.
MAEPF-24380-O
2
W5: ABACUS/ADSIC Interface.
Receiving 1KHz tone @ 3KHz deviation,
-60dbm.
Trace 1 -IDC (2.4MHz)
Trace 2 - DOUT
TRACE 3 - DOUT*
Ch1 Freq
2.251920 MHz
Low resolution
2.00V
500mV
500mV
T
Tek stopped:
T
1
Ch1
T
18 Acquisitions
Tek stopped:
T
2
Ch2
T
11
13
M 50ns Ch1 2.2 V
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.
Ch1 Freq
= Hz
No period
found
Ch1
Ch3
5.00V
5.00V
5.00V
MAEPF-24381-O
T
T
T