AN1833 Freescale Semiconductor / Motorola, AN1833 Datasheet - Page 19

• Manufacturer Part Number: AN1833
• Description: A Low-Power Wireless Remote Control Transmitter and Receiver
• Manufacturer: Freescale Semiconductor / Motorola

Performance in Application Circuit
AN1833
MOTOROLA
In the receiver, an input carrier level of –80 dBm allows recovery of the
PCM waveform without jitter or tearing at 2 kbps (see
improved approximately 15 dB by using a preamp and bandpass filtering
before the mixer. Design of the matching network to the preamplifier
should consider interfacing to an antenna which would be "application
specific," depending on the size and type of antenna. A loop antenna
suitable for this application is discussed in a book by Constantine
Balanis [11].
The pull-in range and hold-in range are dependent on the input drive
level. In general, under higher drive the hold-in and pull-in ranges are
greater.
versus the RF input level. The pull-in range is consistent with the
selectivity of the IF bandwidth.
The application circuit supports data rates up to 50 kHz. This has been
confirmed in the lab with relaxed interstage and baseband filtering. The
wider filtering is much more susceptible to interference.
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 8
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shows a plot of the hold-in range and pull-in range
Performance in Application Circuit
Figure
Application Note
2). This is
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