Hitachi FT-5500 - FEATURES; Field Condition Computer System (FCCS); Tuning System and Station Memory

IMPORTANT FOR U.K:.:
The wires in this mains lead are coloured in accordance with the following code:
Blue: NEUTRAL
Brown: LIVE
As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured
markings identifying the terminals in your plug proceed as follows:
The wire which is coloured BLUE must be connected to the terminal which is marked with the letter
N or coloured BLACK.
The wire which is coloured BROWN must be connected to the terminal which is marked with the let-
ter L or coloured RED.
1. New field condition computer system (FCCS) technique
The microcomputer first conducts a search to see if there are any broadcasting stations generating in-
terference with the desired station. If there is no interference, it switches to high-sensitivity reception; if
there is some interference, the selectivity of the RF or IF stage is automatically enhanced and reception
permitted with reduced interference. In short, this unit features a optimum reception system which in
HITACHI's language is known as a field condition computer system. Moreover, the results of the com-
puter search are automatically preset and memorized for instant recall of the optimum reception mode
at any time.
2. The AM/FM tuning circuits adopt a digital synthesizer system which is based on a crystal oscillator and
a PLL (Phase-Locked-Loop) in order to keep the deviations in the local oscillation frequency down to
the accuracy of the crystal oscillator. The adoption of a microcomputer for the tuning control permits
automatic tuning from 87.9 *(87.50) MHz to 107.9 *(108.00) MHz in 100* (50) kHz steps for FM recep-
tion and manual tuning from 530 *(522) kHz to 1,620 *(1,611) kHz for AM reception. The preset system
is based on random access principles and the total number of stations which can be preset is 10 in-
cluding both AM and FM. It serves to provide more accurate tuning and enhance operating ease — ideal
features now that the number of broadcasting stations is on the rise.
* Frequency range: U.S.A. and Canada (Europe, Asia and Latin America)
[Fein [=i Aton id
Frequency | Step Frequency Step
range frequency range frequency
87.9 —
U.S.A., Canada 107.9 MHz 10 kHz
Europe, Asia and 87.50 —
Latin America
3. Newly developed S.B. (Station Brightener) MPX IC
This unit features the new HA12031 SB MPX IC which is designed to eliminate the beat (birdy) noise
generated during FM stereo reception by interference from broadcasting stations adjacent to the one
tuned in, without impairing the stereo separation.
4. While the field condition computer system is operating, the signal strength meter switches over to
display the frequency so that the computer search can be indicated in visual form and the computer
search movement is shown by an LED pointer.
5. High sensitivity with large-sized loop antenna
Stations come in loud and clear thanks to the new AM RF circuit and large-sized loop antenna with the
high gain that is immune from noise and interference. The loop antenna can be detached from the unit
and installed in a position which yields optimum reception.
6. Keyboard switches with preset indicators
The fingertip controlled keyboard switches come with preset indicators. These light up to indicate
which preset station (1 through 10) is being tuned in during preset tuning.
7. 4-element ladder type of AM ceramic filter
Another prime feature of this unit is the 4-element ladder type of AM ceramic filter that gives you fun
with AM reception without ail that annoying interference and noise but with a superb sound quality.
8. The FT-5500 has a convenient memory back-up system for protecting the memory contents when the
power is OFF.
9. The FT-5500 is also equipped with a recording level check mechanism which is very handy for FM pro-
gram recording. This provides a 440 Hz reference signal and is used to set the recording level to the op-
timum point.