The CT918H is a radio frequency module for cordless telephone applications in the 900 MHz band. It performs full duplex communication with a 45 MHz duplex distance and a channel separation of 25 kHz. It consists of an FM transmitter and receiver with an FM-demodulator. It's provided with a receiver signal-strength indication (RSSI). The frequency control uses a 3-wire bus interface. The transmitter amplifier can be switched on/off externally.
Spec sheet available in PDF format.
Same applies to the base version of this module. Can't find the pinout for this module but it has an SA601 mixer, SA676 FM If/demod and UMA1015 dual PLL inside. Plus the usual assortment of transistors, varactors. Also has a ceramic discriminator and 12.8MHz crystal. Most interesting are a pair of 26.050 2-pole crystal filters. Some variable caps and what looks like a pair of SAW filters. Has potential for wasting a lot of time. Not so sure about using if for a cordless phone but who knows. Lotsa parts inside. I/O via a 2x6 female 2mm header.
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