17
(superscript: The 1st IF signal (10.555MHz) is mixed with 2nd local
frequency of 10.1MHz to produce the 2nd IF of 455kHz at IC401. AF signal
demodulated by IC401 is amplified by the audio amplifier
(Q401/Q403/Q405/Q406) to drive a speaker.)
(superscript: TX Circuit:)
(superscript: TX VCO signal is generated at the PLL circuit and the TX
VCO (IC502 2/2). Meanwhile, voice signal from the microphone (MC401)
modulates the TX VCO signal at IC502. This modulated signal is the TX
RF frequencies as listed above.)
(superscript: Then, the TX RF signal is amplified by RF AMP (Q506/Q507)
and fed into the antenna through a band pass filter (FT501).)
(superscript: 3) Dialing Signal)
(superscript: When this equipment is in Talk Mode, the transmitting
circuit and dialing circuit are activated to make outgoing call. In this
condition, when any number keys are pressed, the CPU (IC404) generates
corresponding dial pulse codes.)
(superscript: 2. Base Unit)
(superscript: 1) Local Frequencies and Intermediate Frequencies)
(superscript: TX VCO Frequency : 925.997470 MHz to 927.947465 MHz)
(superscript: RX 1st Local Freq.: 891.497564 MHz to 893.447559 MHz)
(superscript: RX VCO Frequency : 891.497564 MHz to 893.447559 MHz)
(superscript: RX 2nd Local Freq.: 10.100MHz)
(superscript: 1st Intermediate Frequency: 10.555 MHz)
(superscript: 2nd Intermediate Frequency: 455 kHz)
(superscript: 2) Communication Link to Handset)
(superscript: RX Circuit:)
(superscript: An incoming RF signal from the handset is received through
the antenna.)
