Page 1
Miniature UHF Transmitter, Model 50757TX-F
No extraneous signals
Features Benefits
•Unconditionally stable •
and no spurs
• Up to 9600 Baud • Can handle modest data
rates
• Low power consumption • Low current
requirements
• Compact • Easily fits into most
applications
Miniature UHF Transmitter
464 Hudson Terrace 19516 Amaranth Drive
Englewood Cliffs, NJ 07632 Germantown, MD 20874
(201) 227-0066 (301) 540-0700
www.aerocomminc.com
Page 2
Index
Applications & Specifications
Block Diagram
Schematic & Electrical Component Parts List
50757-04-13, PL50757-03-13
PCB Fabrication & Assembly
50757-07-13, 50757-03-13
Mechanical Drawings
757-0513, 757-0514
Mechanical Assembly
757-02-11, PL 757-02-11
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Miniature UHF Transmitter, Model 50757TX-F
Applications
The AeroComm Miniature UHF Transmitter, Model 50757TX-F is a frequency agile transmitter
suitable for fixed, portable, and airborne applications. It operates in the 860 – 960 MHz frequency
band. When used in conjunction with AeroComm UHF Receiver Model 50757RX, the transmitter
creates a versatile communications link. This compact transmitter, when put into a weatherproof
housing, can operate under the most adverse conditions.
This transmitter can be used in Multiple Address Systems where remote data can be sent to a
central point over long distances.
Specifications
Frequency Range
FCC Acceptance
Channel Spacing
Number of Channels
RF Power Out
Modulation
Data Rate
Frequency Stability
Spurious Output
Output Return Loss
Load VSWR
Part 15 & Part 90 (pending)
25 kHz / 12.5 kHz (selectable)
4000 @ 25 kHz / 8000 @ 12.5 kHz
100 mW (Part 90) / 1 mW (Part 15)
+ 5 kHz (adjustable)
Ordering Options
Power output Option #
1mW W0 (Part 15)
100mW (Part 90)
860-960 MHz
up to 9600 bps
2 ppm
< -40 dBm
> 15 dB
∞
no damage
+5 VDC Line
+12 VDC Line
Transmit Key Line
Continuous Transmission
Key Time to Data Recovery
Reverse Polarity Protection
Temperature Range
Size
Weight
Connectors RF Out
+5V, +12V, KEY
Data
25 mAcontinuous / 170 mAtransmit
4.85” x 2.2” x 0.6”
17 mA continuous
< 1mA @ 5 VDC
YES
1.6 ms
YES
-30 to +60 C
4.45 oz.
SMB Male
1000 pf feed-thru cap
100 pf feed-thru cap
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DATA IN
OP AMP
+12V
+5V1 +5V2 +5V2
OSCILLATOR X3 X3 X2
BPF
BAND PASS
FILTER
AMP
+5V2
X2
X2
FREQUENCY
DOUBLER
BPF
BAND PASS
FILTER
+5V3 +5V3
LPF
LOW:
PASS
FILTER
RF OUT
12V IN
KEY
+5V1
MULTIPLIER
KEY
CIRCUIT
STAGE
5 VOLT
REG
5 VOLT
REG
AMP
+5V2
+5V3
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PARTS LIST
AeroComm, Inc
50757-02-11
ACI-0180
MINI-CIRCUITS
19516 Amaranth Drive
Germantown, MD 20874
301-540-0700
FOR FOUT OF 890-930 MHz USE 492S-1059A TOKO
FILE:
ER #:
PL757-0313
ACI-0199
MODEL / PRODUCT: NEXT ASSY:
NI-TECH
PROGRAM MANAGER: CHARGE #:
JA C757
ISSUED BY: DATE:
JJC 9/18/2000
APPROVED BY: DATE:
REV: DATE:
D 10/26/2000
ECN #: EFFECTIVE DATE:
ASSY TITLE:
PART LIST / ASSY NO.:
FIXED FREQ. TX PL50757-03-13
NOTES:
1. ALT. P/N A1P12, VOLTRONICS (.6-12pF)
2. BAND 1 : 477MS-1094A TOKO 860-910 MHz
BAND 2 : 477MS-1036A TOKO 910-960 MHz
3. FOR FOUT OF 860-890 MHz USE 492S-1055A TOKO
FOR FOUT OF 930-960 MHz USE 492S-1063A TOKO
4. C12 IS 39pF FOR 928.3875 MHZ (P/N: C17AH390J4TXL)
C12 IS 75pF FOR 869.5 MHZ (P/N: C17AH750J4TXL)
5. REFER TO TEST PROCEDURE FOR VALUE RANGE
ITEM REF DES
1
2
U5 78L05ABP VOLTAGE REG. +5V 1 MOTOROLA
3
U6 ZR78L05C VOLTAGE REG. +5V 1 ZETEX
4
U4 ERA-5 MMIC AMPLIFIER 1
5
Q1-3 BFR92 NPN HI FREQ XSTR 3 MOTOROLA
6
C1 C1206C474K5RAC CAP., CERAMIC CHIP 1 .47uF KEMET
7
C2-3 C9 ,C16 , C26 , C36 C1206C104K5RAC CAP., CER CHIP 8 .1uF KEMET
8
C33-34 C39-40 C45 C11CF101J8TXL CAP., PORCELAIN CHIP 5 100pF DIELECTRIC
9
C35 C11AH4R7J5TXL CAP., PORCELAIN CHIP 1 4.7pF DIELECTRIC
10
C6 SEE NOTE 5 C17AHXXXJ4TXL CAP., PORCELAIN CHIP 1 SAT DIELECTRIC
11
C10 C17AH470J4TXL CAP., PORCELAIN CHIP 1 47pF DIELECTRIC
12
C11 C17AH181J4TXL CAP., PORCELAIN CHIP 1 180pF DIELECTRIC
13
C14 C17AH750J4TXL CAP., PORCELAIN CHIP 1 75pF DIELECTRIC
14
C13 C17AH6R0J4TXL CAP., PORCELAIN CHIP 1 6.0pF DIELECTRIC
15
C15 ,C18 C17AH120J4TXL CAP., PORCELAIN CHIP 2 12pF DIELECTRIC
FORM ACI99-8311 Rev. A 1 of 5
AeroComm P/N
50757-03-13 ASSEMBLY DRAWING REF AEROCOMM
50757-04-13 SCHEMATIC REF AEROCOMM
50757-07-13 PCB FAB 1 AEROCOMM
MFR P/N DESCRIPTION QTY VALUE
PREF
P/L MFR
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PARTS LIST
PART LIST NO.:
JUMPER BLOCK USING 3 PIN SIP HEADER
MINI-CIRCUITS
AeroComm, Inc
ASSY TITLE:
FIXED FREQ. TX
REV:
D
ITEM REF DES AeroComm P/N MFR P/N DESCRIPTION QTY VALUE
16
C19 C17AH2R0B4TXL CAP., PORCELAIN CHIP 1 2pF DIELECTRIC
17
C20 C17AH150J4TXL CAP., PORCELAIN CHIP 1 15pF DIELECTRIC
18
C21 C17AH4R7J4TXL CAP., PORCELAIN CHIP 1 4.7pF DIELECTRIC
19
C24 C17AH5R6J4TXL CAP., PORCELAIN CHIP 1 5.6pF DIELECTRIC
20
C25 C29 C17AH101J4TXL CAP., PORCELAIN CHIP 2 100pF DIELECTRIC
21
C4 SEE NOTE 1 5851 CAPACITOR, VARIABLE 1 .5-5pF JOHANSON
22
C31 C37 C42 C44 ECS-T1CY105R CHIP CAP, TANT, 16V 4 1uF PANASONIC
23
C41 C43 ECS-T1EY105R CHIP CAP, TANT, 25V 2 1uF PANASONIC
24
C7 C17 C23 C28 C32 C38 C1206C102J1GAC CAP., CERAMIC CHIP 6 1000pF KEMET
25
C27 C1206C101J1GAC CAP., CERAMIC CHIP 1 100pF KEMET
26
C5 SEE NOTE 5 C17CFXXXB4TXL CAP., CERAMIC DISC 1 SAT DIELECTRIC
27
CR3 LM129A ZENER REF DIODE 1 NATIONAL
28
CR2 1N4001 SMALL SIGNAL DIODE 1
29
FL2 SEE NOTE 2 FILTER, 2 SEC. HEL. 1 TOKO
30
FL1 SEE NOTE 3 FILTER, 2 SEC. HEL. 1 TOKO
31
L5-7 PTL2012-FR10T CHIP IND, 0805 3 .10uH TOKO
32
L8 B09TJ IND, MINI SPRING B 1 35nH COILCRAFT
33
L3-4 E558CN-100048 MOLDED COIL 2 53nH TOKO
34
L1-2 A638AN-0150Z INDUCTOR, VAR SM 2 68nH TOKO
35
C49 SEE NOTE 5 E330JR CAP., CERAMIC DISK 1 SAT UNKNOWN
36
JP1 PTC36SAAN
37
C8 T350A105K035AS CAP., TANTALUM 1 1uF KEMET
38
U1 MC33171D LOW PWR SPLY AMPL. 1 MOTOROLA
39
Z1 SK-2 FREQUENCY DOUBLER 1
1 SULLINS
PL50757-03-13
PREF
SPL MFR
FORM ACI99-8311 Rev. A 2 of 5
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PARTS LIST
PART LIST NO.:
MINI-CIRCUITS
MINI-CIRCUITS
AeroComm, Inc
ASSY TITLE:
FIXED FREQ. TX
REV:
D
ITEM REF DES AeroComm P/N MFR P/N DESCRIPTION QTY VALUE
40
CR1 MV209 VLTG VAR. CAP. DIODE 1 MOTOROLA
41
R1 3339P-10K RESISTOR, VAR. 1 10K BOURNS
42
R2 R4 ERJ-8GCYJ104M RES, CHIP 2 100K PANASONIC
43
R3 ERJ-8GCYJ474M RES, CHIP 1 470K PANASONIC
44
R5 R10 R18 ERJ-8GCYJ100M RES, CHIP 3 10 PANASONIC
45
R6 ERJ-8GCYJ513M RES, CHIP 1 51K PANASONIC
46
R11 ERJ-8GCYJ911M RES, CHIP 1 910 PANASONIC
47
R12 ERJ-8GCYJ621M RES, CHIP 1 620 PANASONIC
48
R13 R15 ERJ-8GCYJ683M RES, CHIP 2 68K PANASONIC
49
R14 ERJ-8GCYJ471M RES, CHIP 1 470 PANASONIC
50
R16 ERJ-8GCYJ360M RES, CHIP 1 36 PANASONIC
51
R8 ERJ-8GCYJ153M RES, CHIP 1 15K PANASONIC
52
R9 ERJ-8GCYJ103M RES, CHIP 1 10K PANASONIC
53
PL50757-03-13
PREF
SPL MFR
54
55
56
57
58
59
60
61
62
63
64
FORM ACI99-8311 Rev. A 3 of 5
R20 ERJ-8GCYJ123M RES, CHIP 1 12K PANASONIC
R21 ERJ-8GCYJ102M RES, CHIP 1 1K PANASONIC
R22-23 ERJ-8GCYJ103M RES, CHIP 2 10K PANASONIC
R7 SAT THERMISTOR, NTC 1 2K KEYSTONE
U2 ERA-1SM MONOLITHIC AMPL. 1
U3 ERA-3 MMIC AMPLIFIER 1
Q5 FMMT3904 NPN TRANSISTOR 1 DIGI-KEY
Q4 FMMT2907 PNP TRANSISTOR 1 DIGI-KEY
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PARTS LIST
PART LIST NO.:
AeroComm, Inc
ASSY TITLE:
FIXED FREQ. TX
REV:
D
ITEM REF DES AeroComm P/N MFR P/N DESCRIPTION QTY VALUE
65
Y1 HT82287 CRYSTAL 1
66
67
L9 L10 A02T5 IND, MINI SPRING A 2 5nH COILCRAFT
68
C46,C48 C11AH3R9B4TXL CAP., PORCELAIN CHIP 2 3.9pF DIELECTRIC
69
C47 C11AH6R2B4TXL CAP., PORCELAIN CHIP 1 6.2pF DIELECTRIC
70
R17 ERJ-8GCYJ430M RES, CHIP 1 43 PANASONIC
71
C12 SEE NOTE 4 CAP., PORCELAIN CHIP 1 DIELECTRIC
72
R24 R26 ERJ-8GCYJ331M RES, CHIP 2 330 PANASONIC
73
R25 ERJ-8GCYJ180M RES, CHIP 1 18 PANASONIC
STC02SYAN SHORTING JUMPER 1 SULLINS
25.788542
MHz HI-Q
74
75
76
77
PL50757-03-13
PREF
SPL MFR
78
79
80
81
82
83
84
85
86
87
88
89
FORM ACI99-8311 Rev. A 4 of 5
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AeroComm, Inc
TOP
19516 Amaranth Drive
Germantown, MD 20874
301-540-0700
FILE:
ER #:
PL757-0211A
ACI-0284
MODEL / PRODUCT: NEXT ASSY:
900MHz TX
PROGRAM MANAGER: CHARGE #:
JA C814
ISSUED BY: DATE:
RWC 8/7/2000
APPROVED BY: DATE:
REV: DATE:
A 8/7/2000
ECN #: EFFECTIVE DATE:
PARTS LIST
ASSY TITLE:
PART LIST / ASSY NO.:
FIXED FREQ 900MHz TX PL50757-02-11
NOTES:
ITEM REF DES
1
2
3
4
5
6
FT1-FT3 2425-001-X5UO-102AA CAP FEED THRU #8-32 3 1000pF TUSONIX
7
FT4 2425-001-X5U0-101AA CAP FEED THRU #8-32 1 100pF TUSONIX
8
9
10
11
12
13
14
AeroComm P/N
50757-02-11 ASSEMBLY DRAWING REF AEROCOMM
50757-03-13 PCB ASSY, TX 1 AEROCOMM
50757-05-13 HOUSING 1 AEROCOMM
50757-05-14 COVER 1 AEROCOMM
131-3593-401 CONNECTOR, SMB 1 JOHNSON
91771A065 SCREW, #1-64 x 3/16 FH 4 McMASTER
91771A076 SCREW, #2-56 x 3/16 FH 6 McMASTER
91772A076 SCREW, #2-56 x 3/16 PH 8 McMASTER
91475A003 WASHER, SPLIT LOCK #2 8 McMASTER
707-1608 GROUND LUG #8 1 CONCORDE
1671A CABLE, COAX RG405 4" BELDEN
56-590-65/3B-C BEAD FERRITE 4 ELNA
MFR P/N DESCRIPTION QTY VALUE
PREF
P/L MFR
Page 16
PARTS LIST
PART LIST NO.:
AeroComm, Inc
ITEM REF DES AeroComm P/N MFR P/N DESCRIPTION QTY VALUE
16
17
18
19
2843/7 RED WIRE #26 AWG RED A/R BELDEN
2843/7ORANGE WIRE #26 AWG ORN A/R BELDEN
2843/7 BLUE WIRE #26 AWG BLU A/R BELDEN
2843/7 YELLOW WIRE #26 AWG YEL A/R BELDEN
ASSY TITLE:
FIXED FREQ. 900MHz TX
REV:
A
PL50757-02-11
PREF
SPL MFR
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