Sharp CD-BA1500H Service Manual page 11

• 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
[For example] Pickup and memorized to preset CH.
f 1
f 2 f 3
P 1 (PI code)
PS 1 (Station Name)
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 frequecy.
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.
1. Introduction of RDS for CD-BA1500H.
CD-BA1500H RDS function is equal to adding EON feature to the current CD-C75H RDS.
EON feature is EON—PTY and EON—TI.
Although PTY and TI indicators are separated, PTY contains TI in the PTY items (software) like current PTY search items.
NEWS, AFFAIRS,
EON—PTY and EON—TI are basically stand-by → receive the desired program of ON station.
2. The difference point from current CD-C75H RDS. (CD-C75H — CD-BA1500H)
1. PTY item: added TA. (TTL 18 kind.)
2. Each "TP", "TA" ind. light up or go out individually.
"TA" ind. doesn't light up on current model, CD-C75H due to none EON—TI.
3. Added 3 indicators(in FL) due to adding EON feature.
EON: Lights up only during receiving EON data (14A).
During EON-TI stand-by → Light up
TI:
During receiving ON station. → blink.
PTY: During EON-PTY stand-by → Light up
During receiving ON station. → blink.
4. No adjust type (None adjusting circuit.)
5. Added EON button.
6. Need to change RDS logo due to the addition of EON feature.
7. Added EON—TI, EON—PTY function.
3. Summary of CD-BA1500H RDS—EON operation
EON—PTY: Select and set the desired "PTY" → stand-by → switch to ON (other network) Station at the start of desired PTY
automatically → stay and listen to PTY of ON station → switch back to TN (This net) station automatically at the end
of PTY (ON) i.e. after changing to another PTY (except AFFAIRS) or cancelling to receive PTY of ON station
midway.
Select and set the "TI" → stand-by → switch to ON station at the start of traffic announcement automatically → stay
EON—TI:
and listen to TA of ON station → switch back to TN station automatically at the end of TA (ON).
ie after TA (ON) is over or cancelled to receive TA of ON station midway.
When switching TN → ON station.
In case of exist 2 more stations having the desired (specified) "PTY" or "TI", the receiver will select and switch to ON station
comparing field strength at the same time. But when the frequency of ON station exists in the preset-memory, then receiver
switches straight to that ON station (CH), without comparing field strength so can make a quick switching from TN—ON station.
Preset memory takes priority of switching TN—ON station.
Therefore ASPM is usefull not only for PTY search but also for rapid EON switching.
Anyway CD-BA1500H EON is basically stand-by and receiving method, along with the Guidelines for EON implementation.
All manuals and user guides at all-guides.com
Each PI has AF'S list by individually.
Exa: P1 has f
P2 has f
f 5 f 4 f 6
f 7 f 8
P 2
P 3
PS 2
PS 3
INFO,
↑
EON—PTY
Can select and stand-by
, f , f (same PTY).
1 2 3
, f (same PTY).
4 5
f 9 f 10
f 11 f 12 f13
P 4
PS 4
ALARM, TI (TTL 17 kinds)
↑
EON—TI
Can select and stand-by
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CD-BA1500H