CD-DP900 (serv.man18). RDS explanation - Sharp Audio Service Manual (repair manual)

cd-dp900 (serv.man18) service manual
Model
CD-DP900 (serv.man18)
Pages
3 Few pages! See other manuals at the bottom of the first or last page.
Size
57.2 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System / RDS explanation
File
cd-dp900-sm18.pdf
Date

Read Sharp CD-DP900 (serv.man18) Service Manual online

CD-DP900H/E
– 20 –
Yes
Yes
Hold down the ASPM button for 3 more second.
No operate. After displayed “END”. Return to
previous station.
“ASPM” blinks in the display.
Begin to scan start 87.50 
 108.00 MHz
Preset CH memory full over?
SD (TUNE) DET out OK?
Yes
No
No
No
No
No
If count 1st OK?
Yes
If count 2nd OK?
Yes
RDS signal or not?   PI—identify
Yes
Comparing PI cord
same or not?
between current receiving
PI and before PI which is
already memorized by
ASPM on this time.
Yes
Yes
No
Comparing freg.
same or not?
between current receiving
frequency and (already)
previouslymemorized
frequency.
No
Memorized to the lowest vacant
preset channel.
No
Memorized to the lowest vacant
preset channel.
Compare the field 
strength of current 
receiving signal.
Is receiving signal stronger 
than signal which has same PI 
cord and is already 
memorized to preset 
memory ahead of this
receiving time?
No effect
No effect
No effect
Effect
Pass
No effect
Pass
No effect
Pass
No effect
Pass
No effect
Displayed the TTL quantity of memorized
stations by ASPM operation on this time.
And return to the previous
receiving freq. automatically. 
Begin to ASPM SCAN from the next
CH-SPAN again.
Repeat and continue with same format
ASPM operation untill 108 MHz.
After reached 108 MHz, displayed the TTL
quantity of memorized stations.
And return to the previous receiving freq.
automatically.
Preset CH memory become full over?
Yes
No
Comparing freg.
same or not?
Between current receiving
frequency and (already)
previously memorized
frequency.
ASPM, summary operation
RDS OPERATION (FOR CD-DP900H ONLY)
– 21 –
CD-DP900H/E
Using the Radio Data System (RDS)
RDS is a broadcasting service which a growing number of FM stations provide.
These FM stations send additional signals along with their regular programme
signals. They send their station names, and information about the type of pro-
gramme such as sports or music, etc.
When tuned to an RDS station, "RDS" and the station name will be displayed.
"TP" (Traffic Programme) will appear on the display when the received broadcast car-
ries traffic information, and "TA" (Traffic Announcement) will appear whilst a traffic
information is on air.
"PTYI" (Dynamic PTY Indicator) will appear whilst the Dynamic PTY station is
received.
 
 
You can control the RDS by using the buttons on the main unit only.
Information provided by RDS
Each time the DISPLAY MODE button is pressed, the display will switch as follows:
 
When you are tuning in to a station other than an RDS station or to an RDS station
which sends weak signal, the display will change in the following order:
 
Notes for RDS operation
If any of the following events occur, it does not mean that the unit is faulty:
"PS", "NO PS" and a station name appear alternately, and the unit does not oper-
ate properly.
If a particular station is not broadcasting properly or a station is conducting tests,
the RDS reception function may not work properly.
When you receive an RDS station whose signal it too weak, information like the
station name may not be displayed.
"NO PS", "NO PTY" or "NO RT" will flash for about 5 seconds, and then the fre-
quency will be displayed.
Notes for radio text:
The first 8 characters of the radio text will appear for 4 seconds and then they will
scroll across the display.
If you tune in to an RDS station which is not broadcasting any radio text, "NO RT"
will be displayed when you switch to the radio text position.
Whilst radio text data is received or when the text contents change, "RT" will be
displayed.
Station name (PS)
Programme type (PTY)
Frequency
Radio text (RT)
NO PS
NO PTY
FM 98.80 MHz
NO RT
• ASPM SCAN: 87.50MHz 
 108.00 MHz.
• Only RDS signal is memorized by ASPM because RDS signal has PI code and is suitable and convenient for ASPM operation.
  ASPM
  Comparing field strength, only one strongest RDS station is memorized of all stations (repeater relay stations)  that have same
PI code.
Same PI code —  freq: different
        (AF’S)
      PS: same
      PTY:
same
Each PI has AF’S list by individually.
Exa: P1 has f
1
, f
2
, f
3
 (same PTY).
        P2 has f
4
, f
5
 (same PTY).
[For example]
Pickup and memorized to preset CH.
f 1
f 2       f 3
P 1 (PI code)
PS 1 (Station Name)
f 5       f 4
P 2
PS 2
     f 6
f 7       f 8
P 3
PS 3
f9        f 10
f 11  f 12  f13
P 4
PS 4
  Select signals (f1, f5, f7, f10) are memorized in the preset memory by ASPM.
• If tentative - ASPM operation is repeated intentionally, never memorized (over write) at the same frequency.
1st time ASPM 
→ 
strongest stations of each PI are memorized.
ASPM is not only very usefull for PTY search, but also EON operation.
2nd time ASPM 
 2nd strong stations of each PI are memorized and so on.
PTY search function is equal to FM band search function as a result.
---
---
CD-DP900H/E
– 22 –
 
Descriptions of the PTY (Programme Type) codes, TP (Traffic Programme) and
TA (Traffic Announcement).
You can search for and receive the following PTY, TP and TA signals.
NEWS
Short accounts of facts, events and publicly expressed views, report-
age and actuality.
AFFAIRS
Topical programme expanding or enlarging upon the news, generally 
in different presentation style or concept, including debate, or analy-
sis.
INFO
Programmes whose purpose is to impart advice in the widest sense.
SPORT
Programme concerned with any aspect of sport.
EDUCATE
Programme intended primarily to educate, of which the formal ele-
ment is fundamental.
DRAMA
All radio plays and serials.
CULTURE
Programmes concerned with any aspect of national or regional cul-
ture, including language, theatre, etc.
SCIENCE
Programmes about the natural sciences and technology.
VARIED
Used for mainly speech-based programmes usually of light-entertain-
ment nature, not covered by other categories. Examples include: 
quizzes, panel games, personality interviews.
POP M
Commercial music, which would generally be considered to be of cur-
rent popular appeal, often featuring in current or recent record sales 
charts.
ROCK M
EASY M
Current contemporary music considered to be "easy-listening", as op-
posed to Pop, Rock or Classical, or one of the specialised music 
styles, Jazz, Folk or Country. Music in this category is often but not 
always, vocal, and usually of short duration.
LIGHT M
Classical music for general, rather than specialist appreciation. Ex-
amples of music in this category are instrumental music, and vocal or 
choral works.
CLASSICS
Performances of major orchestral works, symphonies, chamber mu-
sic, etc., and including Grand Opera.
OTHER M
Musical styles not fitting into any of the other categories. Particularly 
used for specialist music of which Rhythm & Blues and Reggae are 
examples.
WEATHER
Weather reports and forecasts and meteorological information.
FINANCE
Stock Market reports, commerce, trading, etc.
CHILDREN
For programmes targeted at a young audience, primarily for entertain-
ment and interest, rather than where the objective is to educate.
SOCIAL
Programmes about people and things that influence them individually 
or in groups. Includes: sociology, history, geography, psychology and 
society.
RELIGION
Any aspect of beliefs and faiths, involving a God or Gods, the nature 
of existence and ethics.
PHONE IN
Involving members of the public expressing their views either by 
phone or at a public forum.
TRAVEL
Features and programmes concerned with travel to near and far des-
tinations, package tours and travel ideas and opportunities. Not for 
use for announcements about problems, delays, or roadworks affect-
ing immediate travel where TP/TA should be used.
LEISURE
Programmes concerned with recreational activities in which the listen-
er might participate. Examples include, Gardening, Fishing, Antique 
collecting, Cooking, Food & Wine, etc.
JAZZ
Polyphonic, syncopated music characterised by improvisation.
COUNTRY
Songs which originate from, or continue the musical tradition of the 
American Southern States. Characterised by a straightforward melo-
dy and narrative story line.
NATION M
Current Popular Music of the Nation or Region in that country's lan-
guage, as opposed to International 'Pop' which is usually US or UK 
inspired and in English.
OLDIES
Music from the so-called "golden age" of popular music.
FOLK M
Music which has its roots in the musical culture of a particular nation, 
usually played on acoustic instruments. The narrative or story may be 
based on historical events or people.
DOCU-
MENT
Programme concerned with factual matters, presented in an investi-
gative style.
TEST
Broadcast when testing emergency broadcast equipment or receiv-
ers.
ALARM !
Emergency announcement made under exceptional circumstances to 
give warning of events causing danger of a general nature.
NONE
No programme type (receive only).
TP
Broadcasts which carry traffic announcements.
TA
Traffic announcements are being broadcast.
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Here you can read online and download Sharp CD-DP900 (serv.man18) Service Manual in PDF. CD-DP900 (serv.man18) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp CD-DP900 (serv.man18) System. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.