KDK FM-2016A - Tone Oscillator; Accessory Connector

(G) RECEIVER SECTION
Dual-gate MOS-FETs are used for the RF amplifier and first mixer and provides a
superior inter- and cross-modulation characteristic as well as sensitivity.
These characteristics are maintained constant across the wide frequency range
covered by the use of an all electronic automatic tuning circuit using varicap
diodes in the RF section. The combination of a monolithic crystal in the first
IF and a commerical guality 15 pole ceramic filter in the 2nd IF results in ex-
tremely sharp selectivity. The 2nd IF amplifier is built up with discrete com-
ponents rather than using an IC to keep input-output coupling to a minimum. A
ceramic discriminator has been adopted for improved temperature stability as
well as holding alignment over a long life period. An RIT (receiver incremen-
tal tuning control) and discriminator meter is useful when contacting off-fre-
quency stations and an RF attenuator provides approximately 10dB of attenuation
when using the transceiver under extreme inter- and cross-modulation situations.
(H) TRANSMITTER SECTION
Single conversion type using a balancedmixer. 5 stages of electronic tuning si-
milar to that of the receiver together with a 4 stage low pass filterin the
transmitter output results in a clean, spur-free signal. A latest type silicon
transistor is used as the final amplifier and will hold up even under the ex-
treme conditions of an infinite VSWR load. HIGH (15 watts) and LOW (lwatt) is
available with the front panel power switch, and is useful for reducing power
for use in conjunction with a linear. True direct frequency modulation of
the VCO results in a very distortion free modulation characteristic. :
(I) MULTI-PURPOSE TONE OSCILLATOR
An internal tone generator system has been provided for accessing repeators.
Two modes are selected by an internal switch (burst or continuous) and sub-audi-
ble or tone burst frequencies can be generated by changing capacitors. (FM-2016A
pre-set at factory to 100HzZ and FM-2016E pre-set to 1,750Hz.)
(J) ACCESSORY CONNECTOR
A 5 pin "DIN" type connector is provided on the rear panel for connection of a
KDK SC-12A SEL-CALL (tone encoder/decoder) unit. Also useful for connection of
phone-patch, touch-tone, remote headset-microphone combinations and similar type
accessories.
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