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Sharp Electronic Components Datasheet

E2251T Datasheet

PAL Format Electronic Television Modulators

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E2251T pdf
PRODUCT INFORMATION
E225x and E235x
Series PAL Format
Electronic Television
Modulators
APPLICATIONS:
Television/VCR
Satellite receivers
Multi-media adapters
Video signal converters
E2258T2 PACKAGAGE
RF Components
Group
FEATURES
• Power supply: 5 V
• Small Size: 44 mm × 44 mm × 17 mm
• Common Footprint
• Common Electrical Interface
• Standard pin-pitch between models
• I2C bus serial PLL control
• Same input connector locations between models
• Reduced component count
• High level of integration E2258T2 meets CENELEC emissions
requirements
DESCRIPTION
The E225x and E235x Series Modulators are new PAL format
modulators with the output frequency set by a PLL.
These modulators provide direct Phase-Locked Loop tuning in-
stead of the previous screwdriver setting, providing software flexibil-
ity over output channel control. The output may be tuned over the
PAL channel range of 21 ~ 69.
These two new modulator series retain the common modulator
mechanical footprint of previous designs. A variety of versions and
options are available, as shown in the table.
The PLL programming is provided by an I2C serial bus interface.
Modulation factors of 100% and 55% are available.
Test and evaluation software is available upon request for pro-
gramming the E225X and E235X modulator models.
E225-1
PROGRAMMABLE OPTIONS
• Output frequency
• Test Signal Generator (TSG) On/Off
• Test Modes On/Off
• Intercarrier spacing for output Mode – G/I/K (E2354T)
• Audio carrier level: -10 to -17 dB with respect to the Video
carrier (E2354T)
SELECTION GUIDE
MODEL
PAL
FORMAT
MODULATION
FACTOR
PLL SETS
E2251T G
100% Channel, TSG, RF On/Off
E2251TA G
55% Channel, TSG, RF On/Off
E2258TA G/I
55% Channel, TSG, RF On/Off
E2258T2 G/I
55% Channel, TSG, RF On/Off
E2354T G/I/K
100%
Channel, TSG, Format, Power
Save On/Off, Video/Audio Ratio
E2358T G/I
100% Channel, TSG, RF On/Off


Sharp Electronic Components Datasheet

E2251T Datasheet

PAL Format Electronic Television Modulators

No Preview Available !

E2251T pdf
PRODUCT INFORMATION
BASIC BLOCK DIAGRAM
ANTENNA
IN
TV
OUT
VIDEO
IN
VIDEO
CLAMP
WHITE
CLIP
MODULATION
RF CARRIER
OSCILLATOR
PLL
I2C
AUDIO
IN
PRE-
EMPHASIS
FM MODULATOR
OSCILLATOR
CLOCK
DATA
6 MHz
TANK
5.5 MHz
TANK
MECHANICAL DIMENSIONS
(S = 2/1)
4.24
2.6
0.5 5.7
5.35
1.3
2.0 8.0 2.0
17.0
8.5
17.0
8.5
CH.
SELECTOR
A - A'
M2.6 TAP
1.5
22.5
A A'
6.6
9.6
10.7
44.0
26.7
10.0
12.0
TV - OUT
(IEC-M)
22.0
46.5 46.0
24.0
13.7
G
I
PAL
SELECTER SW
TRAVEL: 2
(S = 2/1)
0.8
0.6
2.0
1
0.4 0.6
(42)
NOTES:
1. Dimensions are in mm.
2. Tolerances are ±0.5 unless otherwise specified.
8 - 2.5
9
40.8
42.0
3.5
28.0 44.0
φ2.5
ANT - IN
(IEC - F)
NO.
NAME
1 BT (33 V)
2 VIDEO IN
3 AUDIO IN
4 MD +B (5 V)
5 NC
6 NC
7 CLOCK
8 DATA
9 NC
E225-3
FastFax Service: 1-800-833-9437
Product Information: 1-800-642-0261
World Wide Web Site: http://www.sharpmeg.com
E225-2
Sharp Electronics
Corporation Regional
Sales Offices
North American
Headquarters
Camas, WA
Ph (360) 834-2500
Fax (360) 834-8903
West
Irvine, CA
Ph (714) 250-0225
Fax (714) 250-0438
San Jose, CA
Ph (408) 436-4900
Fax (408) 436-0924
Central
Romeoville, IL
Ph (708) 226-2400
Fax (708) 759-8572
Auburn Hills, MI
Ph (810) 377-9220
Fax (810) 377-9222
Austin, TX
Ph (512) 349-7262
Fax (512) 349-7002
DFW Airport, TX
Ph (214) 574-5205
Fax (214) 456-0360
Houston, TX
Ph (713) 955-9909
Fax (713) 955-9910
East
Burlington, MA
Ph (617) 270-7979
Fax (617) 229-9117
Annadale, NJ
Ph (908) 713-0505
Fax (908) 713-0566
Durham, NC
Ph (919) 941-0065
Fax (919) 941-0066
Distributors
Future Electronics
Canada
Ph (514) 694-7710
Fax (514) 695-3707
Marshall Industries
El Monte, CA
Ph (800) 522-0084
Fax (818) 307-6173
URL http://www.marshall.com
Milgray
Farmindale, NY
Ph (800) MILGRAY (645-4729)
Fax (516) 293-6465
Reptron
Tampa, FL
Ph (800) 659-1361
Fax (813) 854-2351
Sterling Electronics Corp.
Houston, TX
Ph (800) 745-5500
Fax (713) 629-3939
Copyright ©1997, Sharp Electronics Corp. All rights reserved. All tradenames are the registered property of their respective owners. Specifications are subject to change without notice.
SMT97029


Part Number E2251T
Description PAL Format Electronic Television Modulators
Maker Sharp Electrionic Components
Total Page 2 Pages
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