SI2493-C-FS Silicon Laboratories Inc, SI2493-C-FS Datasheet - Page 196

• Manufacturer Part Number: SI2493-C-FS
• Description: IC ISOMODEM SYSTEM-SIDE 16SOIC
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2493-C-FS

• Mfg Application Notes: SI2493/57/34/15/04, Appl Note AN93
• Data Format: V.21, V.22, V.23, V.29, V.32, V.34, V.90, V.92, Bell 103, Bell 212A
• Baud Rates: 56k
• Interface: UART
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AN93
Figure 59. Adobe Audition Spectral View of a Good V.22 Transaction
An important parameter that is not obvious at first
glance is the resolution in "bands" of the spectral
display. There is a tradeoff that must always be
considered. This is set up in the Options->Settings
Display tab in the Adobe Audition product.
This parameter allows for finer and coarser vertical
(frequency) resolution at the cost of time domain
uncertainty.
Figures 60 and 61 depict the same wave files but with
256 bands vs. 2048 bands. One can see better timing
details in one graph compared with the other.
The 256 band spectral display shown in Figure 60
shows the fine timing details of the protocol with poor
frequency resolution.
The 2048 Band spectral display shown in Figure 61
allows for precise frequency measurements and signal
separation but at the cost of fine time resolution.
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