System Design Considerations
Using the TRF1400
RF Telemetry Receiver
Application Report
SLWA005D
APRIL 1998
Printed on Recycled Paper
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iii
System Design Considerations Using the TRF1400 RF Telemetry Receiver
Contents
Abstract 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Introduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Design Considerations 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 External Components 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Antenna Issues 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Proximity to Local Noise Sources 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Sensitivity/Out-of-Band Rejection 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Bit Error Rate Versus Sensitivity 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Symbol Code Format 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Determining Symbol Identity 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Testing RF Telemetry Receivers for BER 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Test Methodology 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 Calculating BER 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6 Test Results 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7 BER Versus Sensitivity Test Frequencies 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Application Example 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Figures
1 TRF1400 Average Sensitivity and Out-of-Band Rejection 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Symbol Code Format 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Bit Identity Determination 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 BER Test Set-Up 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Data and Resulting ASK Signal 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 TRF1400 BER Versus Sensitivity at 315 MHz With a 3 Kbps Data Rate 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 TRF1400 Demonstration Circuit for 315-MHz Operation 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 TRF1400 Demo Circuit Board Layout — Top Side 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 TRF1400 Demo Circuit Board Layout — Bottom Side 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 TRF1400 Demo Circuit Board Solder Mask — Top Side 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11 TRF1400 Demo Circuit Board Solder Mask — Bottom Side 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12 TRF1400 Demo Circuit Board Silk Screen 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Tables
1 TRF1400 315-MHz Demonstration Circuit Parts List 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv
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1
System Design Considerations Using the TRF1400
System Design Considerations Using the TRF1400
RF Telemetry Receiver
ABSTRACT
TI’s RF telemetry receiver is a fully-integrated VHF/UHF receiver on a chip. The
selection of the external components and the layout of the circuit board required to
complete the circuits are critical to achieving maximum performance. This application
report discusses these issues and provides demonstration circuit schematics, demo
board layouts, a source for Gerber plots, and a complete parts list for demo boards that
are proven performers.
1 Introduction
The Texas Instruments (TI) TRF1400 VHF/UHF RZ ASK RF telemetry receiver
is specifically designed for RZ ASK (return-to-zero amplitude-shift keyed)
communications systems operating in the 200 MHz – 450 MHz band. These
remote control receivers are integrated VHF/UHF receivers on a chip, with only
a small number of external components needed to create fully functional receiver
circuits. The interface to the working environment, however, requires some
attention to the board layout and external components to take full advantage of
the device capabilities. System design issues such as antenna design and
proximity of local noise sources should also be considered. And finally, receiver
sensitivity must be balanced against BERs (bit error rates) for optimum
performance in a system.
Application examples include schematics, board layouts, and a detailed parts list
for demo boards. These are the same circuits, boards, and parts that were used
as test circuits and test boards during the development of the devices.
See the data sheet for the TRF1400 (TI literature number SL WS014) for detailed
information on the device.
TI is a trademark of Texas Instruments Incorporated.
Design Considerations
2
SLWA005D
2 Design Considerations
2.1 External Components
As with any RF design, the successful integration of a TRF1400 receiver device
into a circuit board is dependent on the layout of the board and the quality of the
external components used. Component tolerance and Q specifications (where
applicable) should be observed during the selection of the external parts. This
document includes layout artwork for the demo circuit board and a complete list
of required external parts (with tolerances) for device performance at 315 MHz.
A complete set of Gerber photoplotter files can be obtained by contacting any TI
Field Sales Office.
2.2 Antenna Issues
The coupling of the signal into the TRF1400 device is of paramount importance
if the maximum system sensitivity is to be attained. The input network provided
in the evaluation circuit is designed to match the receiver input to a nominal 50-Ω
load. A trap to reduce interference from 105-MHz broadcast signals is also
included in this network.
The antenna that is used with this receiver should not only be matched to the
TRF1400 input impedance, but should also be of an efficient design. A
quarter-wave monopole, for example, is a good choice. Loop antennas may also
be used, but their performance may vary widely given the available area and
proximity to the circuit board. Loop antennas, even those shorter than one
wavelength, tend to exhibit distinct nulls in the antenna response pattern as well.
If possible, the antenna should be mounted away from the receiver circuit board.
Unfortunately, in many instances system requirements do not allow this, and they
impose conflicting requirements of space, ease of input matching, and efficiency .
If requirements dictate that the antenna be included in a receiver module or other
space-restricted area, an antenna that is close to an ideal form should be selected
and then examined to determined how it might be integrated into the available
space. If this is not possible or not possible without folding the element over the
circuit board, the antenna should be swept with a network analyzer to determine
the effects of the proximity to the ground plane and other devices. Where
possible, the antenna should be trimmed to achieve matching or to approach a
region on the Smith Chart where a 1-element match to 50 Ω may be achieved.
A folded antenna should be kept at least 0.5 inch from the ground plane to avoid
excessive sensitivity to mechanical vibration. The design of such an integrated
antenna may be empirical, as is often the case in nonideal situations.
Smith Chart is a registered trademark of the Analog Instruments Company.
Design Considerations
3
System Design Considerations Using the TRF1400
2.3 Proximity to Local Noise Sources
Any receiver should be shielded from noise sources that can interfere with the
reception of the intended signal. Care should be taken when integrating the
TRF1400 device onto a board with microprocessors or other high-speed logic
elements. Due to their high harmonic content, digital signals produce broadband
noise of sufficient power to interfere with receiver operation both through the front
end and by coupling to board traces. Where possible, digital lines should be
routed around and away from the receiver, and on multilayer boards, running
separate planes for these signals should be considered. Power supply lines
should be regulated and filtered, with particular attention to filtering the supply
lines again at the device power terminals to ensure clean lines. Both
low-frequency and high-frequency filter sections are required.
Care should also be taken to suppress transient noise from relays or broadband
noise from motors and other sources.
2.4 Sensitivity/Out-of-Band Rejection
Out-of-band rejection (rejection of signals outside the intended passband of the
receiver) depends to a large extent on the SAW (surface acoustic wave) filter
used in the design of the complete receiver circuit. In the board layout depicted
for the TRF1400, the pad for the SAW filter has been carefully designed to
maximize the isolation between the input and output pins by including a ground
island
with low impedance paths (vias) between the top and bottom ground
planes. Figure 1 shows the average sensitivity and out-of-band rejection of the
circuit when using the RFM RF1211 SAW specified for the TRF1400 demo board.
Plated-through holes should not be used on the input and output pins of the SAW
filter. Plated-through holes
should
be used for all the ground vias,
however,
particularly in the island area.
Design Considerations
4
SLWA005D
–120
–100
– 80
– 60
– 40
– 20
0
300 305 310 315 320 325 330
Sensitivity – dBm
f – Frequency – MHz
Figure 1. TRF1400 Average Sensitivity and Out-of-Band Rejection
Bit Error Rate Versus Sensitivity
5
System Design Considerations Using the TRF1400
3 Bit Error Rate Versus Sensitivity
RF telemetry (and other) receiver sensitivity specifications are relative to the BER
(bit error rate) of the system. Everything else remaining equal, the higher the
sensitivity of the receiver, the greater the incidence of errors. The BER of a
system is the ratio of incorrectly received bits to the transmitted bits, or errors
divided by the total number of bits. The ideal system would have very high
sensitivity and a very low BER.
3.1 Symbol Code Format
Each bit of a typical symbol code format is represented by a 3-bit symbol for
transmission. The 0 symbol consists of the bit sequence 100, and the 1 symbol
consists of the bit sequence 110, as shown in Figure 2.
Logic 0 Symbol = (100) = 3 Bits
Logic 1 Symbol = (110) = 3 Bits
100
110
T
T = 1 Bit Time
Figure 2. Symbol Code Format
The 1 symbol and the 0 symbol both have the same first bit (1) and the same last
bit (0). Only the middle bit varies between 1 and 0 to indicate that the symbol is
a 1 symbol or a 0 symbol. Using these particular bit sequences to represent a 1
symbol or a 0 symbol results in increased noise immunity and receive-function
robustness over schemes that do not use symbols or that use symbols with other
bit sequences.
3.2 Determining Symbol Identity
The BER of the overall system is largely dependent on the ability of the decoder
to correctly determine the identity of each received symbol. An RF receiver device
receives, detects, and processes an incoming data transmission into a baseband
data stream of 3-bit symbols, which is then applied to the decoder. The decoder
must first determine the identity of each received symbol and convert it into a 1
or a 0 as appropriate to recover the original code.
To help ensure that each symbol is decoded into a 1 or 0 data bit correctly, a
special decoding procedure is used. In this procedure, the identity of each of the
three bits in a symbol is determined separately and then the identity of the
complete symbol is concluded from those results. First, to identify the three bits
in a symbol, each bit is sampled multiple times (approximately 100 times) during
a period that is one-half of a bit time. The decoder schedules this sampling to
occur in the middle of the bit time so that there is 25% of the bit time before the
sampling begins and 25% of the bit time after it ends (see Figure 3).
Bit Error Rate Versus Sensitivity
6
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0 Symbol
(100)
1 Symbol
(110)
T
0.25 T 0.5 T 0.5 T 0.5 T
Sampling
Area Sampling
Area Sampling
Area
Symbol Bit 2
>50% 1 = 1
>50% 0 = 0
Symbol Bit 1
>75% 1 = OK
<75% 0 = Error
Symbol Bit 3
>75% 0 = OK
<75% 0 = Error
1 Bit Time
1/2 Bit Time 1/2 Bit Time 1/2 Bit Time
T
1 Bit Time T
1 Bit Time
Figure 3. Bit Identity Determination
The identity of each bit is then determined separately by the decoder using the
following criteria. For the first bit in the symbol to be considered correct, it must
be high for at least 75% of the sample period. For the last bit in the symbol to be
considered correct, it must be low for at least 75% of the sample period.
Otherwise, there is a format error. The middle bit carries the identity of the symbol
and can be either high or low. T o be considered a 1 bit, the middle bit must be high
at least 50% of its sample period. To be considered a 0 bit, the middle bit must
be low at least 50% of its sample period. Based on this analysis, the decoder
determines the identity of each symbol.
During testing, if the criterion for either the first or last bit in the symbol is not met,
a format error is reported. If the middle bit is high less than 50% of the sample
period for a 1 symbol or if is low less than 50% of the sample period for a 0 symbol,
a code error is reported. A symbol is considered to be received correctly only if
all three bits are determined to be correct.
Bit Error Rate Versus Sensitivity
7
System Design Considerations Using the TRF1400
3.3 Testing RF Telemetry Receivers for BER
Determining the BER of a TI RF telemetry receiver-equipped system is relatively
straightforward. Collect the equipment and connect it together as shown in
Figure 4. The BER Tester is a microcontroller-based device designed specifically
for testing and determining BER.
HP 8664A Synthesized Signal Generator
xx MHz Pulse Ext. DC xx dBm
PULSE
EXT
DC
PULSE
MODE 1
RF O/P
Data
Output
LCD Display
BER Tester
Data
Input
CH1
Digital Scope
CH2
TRF14XX
Demo Board
RF
Input BBOUT
Figure 4. BER Test Set-Up
The signal generator provides the carrier wave and is adjusted to the frequency
of the receiver. The Data Output of the BER Tester is connected to the external
modulation input of the signal generator. The signal generator is then set to
produce 100% on/off-keyed (or ASK) modulation of the carrier by the data signal
supplied from the BER Tester as shown in Figure 5. The ASK modulated signal
from the signal generator is applied to the TRF14XX Demo Board RF input
through a cable and the signal generator output attenuator set for the desired
signal strength. The baseband data output (BBOUT) of the demo board is
connected back to the Data Input port on the BER Tester . A digital scope can be
used to examine the data input to the receiver system versus the data output from
it.
Bit Error Rate Versus Sensitivity
8
SLWA005D
ASK Signal
Data
Figure 5. Data and Resulting ASK Signal
3.4 Test Methodology
Using the test setup as described, the BER T ester transmitted more than 1 million
code symbols at a rate of 1000 symbols per second. The BER Tester compared
the received data from the demo board with the code symbols it had sent and
displayed the error on the LCD.
To confirm that the BER Tester would detect errors, the Data Output line from the
BER tester was disconnected from the modulation input of the signal generator.
The BER Tester was then expected to report the resulting 100% BER. The BER
Tester, however, indicated 99.5% BER.
3.5 Calculating BER
Because of the discrepancy between the 100% actual BER in the test and the
99.5% BER that the tester reported, an offset factor needs to be added to the
formula for calculating BER when using
this
BER Tester.
Use formula 1 to calculate actual BER from data obtained from the BER Tester.
BER = (Total Bit Error
×
1.005)
÷
1048576
Where:
Total Bit Error = format error + code error (see Figure 3)
1.005 = 0.5% BER offset factor
1048576 = Total number of code symbols sent by BER Tester
The 0.5% BER offset factor is from the particular BER Tester that was used for
that test. Different BER Testers are likely to have slightly different offsets. The
offset of a BER Tester should be determined and used to derive the of fset factor
to be used in any calculations.
(1)
Bit Error Rate Versus Sensitivity
9
System Design Considerations Using the TRF1400
3.6 Test Results
BER versus average sensitivity test results are shown in the graphs that follow.
Figure 6 is a plot for a TI TRF1400 receiver IC from lot #61ALN2T installed in a
#8 demo board tuned for 314.8 MHz. Graph (a) is the overall view and graph (b)
is the expanded-scale detail.
–104.2
–105.2
–105.4
–105.6
–105.8
–106
–106.2
–106.4
–106.6
–106.8
–107
–107.2
–107.4
–107.6
–107.8
–108
–108.2
–105.2
–105.4
–105.6
–106
–106.2
–106.4
–106.6
–106.8
–105.8
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0.016
0.014
0.012
0.01
0.008
0.006
0.004
0.002
0
BER — Bit Error Rate
A verage Sensitivity — dBm
(b)
A verage Sensitivity — dBm
(a)
BER — Bit Error Rate
Figure 6. TRF1400 BER Versus Sensitivity at 315 MHz With a 3 Kbps Data Rate
Bit Error Rate Versus Sensitivity
10
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3.7 BER Versus Sensitivity Test Frequencies
The center frequency and the passband characteristics of the SAW filter
determine the passband and the sensitivity of the receiver system. The passband
response of the SAW device is not flat, but instead, exhibits some ripples. For the
purposes of BER/sensitivity testing, the receiver system was first swept to locate
the exact frequency of the highest sensitivity. It was then found that the center
frequency of the SAW filter (315 MHz) did not coincide with the frequency of
highest sensitivity. The frequency showing the greatest sensitivity turned out to
be 314.8 MHz for the TRF1400.
Application Example
11
System Design Considerations Using the TRF1400
4 Application Example
The TRF1400 is a tuned RF amplifier design, using no local oscillator, which
avoids the difficulties normally associated with local oscillators. As with any RF
design, the successful integration of the device into a circuit board relies heavily
on the layout of the board and the quality of the external components. Figure 7
shows the schematic for the TRF1400 demonstration circuit and Figures 8
through 12 show the layout of the demo board. Table 1 lists the parts required to
complete the circuit, which demonstrates TRF1400 performance at 315 MHz.
Specified component values and tolerances should be observed during the
selection of parts.
A complete set of Gerber photoplotter files for the circuit board can be obtained
from any TI Field Sales Office.
LPF
AGND
RFIN3
AGND
AGND
OSCR
OSCC
AGND
LNA2T
RFIN2
TRIG
DGND
DOUT
BBOUT
RFOUT2
AGND
TRF1400 (U1)
123456789101112
131415161718192021222324
RFOUT1
LNA1T
RFIN1
AGND
OFFSET
AVCC
DVCC
RF Input
AVCC
C11 C12 C16
C14
C13
R3 R4
R5
C18
C19
C20
R6
R7
R8 DOUT
TRIG
BBOUT
C17
R1R2 C3
C2
C8 L1
L4
C7 C4
C9
C10
C1
AVCC
LED
R11Buzzer
Optional
+
E1 E2
(Jumpers)
R10
R9 S1
Vcc1
B1X
Optional
C15
DVCC
(Short)
H1 H2
SAW
Filter
C5
L2
L3
C6
Figure 7. TRF1400 Demonstration Circuit for 315-MHz Operation
Application Example
12
SLWA005D
NOTE A: Circuit board material is 62 mil G–10 with 1-oz copper, dielectric constant = 4.5
Figure 8. TRF1400 Demo Circuit Board Layout — Top Side
Figure 9. TRF1400 Demo Circuit Board Layout — Bottom Side
Figure 10. TRF1400 Demo Circuit Board Solder Mask — Top Side
Application Example
13
System Design Considerations Using the TRF1400
Figure 11. TRF1400 Demo Circuit Board Solder Mask — Bottom Side
Figure 12. TRF1400 Demo Circuit Board Silk Screen
Application Example
14
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Table 1. TRF1400 315-MHz Demonstration Circuit Parts List
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
DESIGNATORS
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
DESCRIPTION
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
VALUE
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
MANUFACTURER
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
MANUFACTURER P/N
ÁÁÁÁÁÁ
C1
ÁÁÁÁÁÁ
Capacitor
ÁÁÁÁÁÁÁÁ
4 pF
ÁÁÁÁÁÁ
Murata
ÁÁÁÁÁÁÁÁ
GRM40C0G040C050V
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
C2, C3
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Capacitor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
22 pF
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Murata
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
GRM40C0G220J050BD
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
C4, C7
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Capacitor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
100 pF
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Murata
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
GRM40C0G101J050BD
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
C5
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Capacitor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
5 pF
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Murata
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
GRM40C0G050D050BD
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
C6
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Capacitor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
1.5 pF
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Murata
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
GRM40C0G1R5C050BD
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
C8
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Capacitor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
3 pF
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Murata
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
GRM40C0G030C050BD
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
C9
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Capacitor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
18 pF
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Murata
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
GRM40C0G180J050BD
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
C10
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Capacitor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
0.047 µF
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Murata
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
GRM40X7R473K050
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
C11, C12, C17,
C19
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Capacitor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
2200 pF
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Murata
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
GRM40X7R222K050BD
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
C13, C18, C20
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Capacitor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
0.022 µF
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Murata
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
GRM40X7R223K050BL
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
C14, C16
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Capacitor, Tantalum†
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
4.7 µF @ 6.3 V
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Panasonic
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ECS–T1AY475R
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
C15
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Capacitor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
220 pF, 5%
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Murata
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
GRM40C0G221J050BD
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
E1
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
2-Pin Connector
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
3M
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
2340–6111–TN
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
E2
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
2-Pin Connector
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
3M
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
2340–6111–TN
ÁÁÁÁÁÁ
E3
ÁÁÁÁÁÁ
6-Pin Connector
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
3M
ÁÁÁÁÁÁÁÁ
2340–6111–TN
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
H1, H2
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Header Shunts
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
3M
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
929952–10
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
F1
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
SA W Filter
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
RFM 1211
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
RFM
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
RFM 1211
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
L1
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Inductor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
47 nH
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Coilcraft
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
0805HS470TMBC
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
L2
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Inductor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
82 nH
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Coilcraft
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
0805HS820TKBC
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
L3
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Inductor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
120 nH
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Coilcraft
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
0805HS121TKBC
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
L4
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Inductor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
39 nH
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Coilcraft
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
0805HS390TMBC
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
P1
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
RF SMA Connector
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Johnson
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
142–0701–201
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
R1
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Resistor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
1.2 KΩ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
R2
ÁÁÁÁÁÁ
Resistor
ÁÁÁÁÁÁÁÁ
1.2 KΩ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
R3
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Resistor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
3 MΩ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
R4
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Resistor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
130 KΩ, 1%
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
R5
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Resistor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
0 Ω
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
R6, R8
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Resistor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
1K Ω
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
R7
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Resistor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
100 Ω
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
R9
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Resistor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
680 Ω
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
R10
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Resistor
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
short
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
R11
ÁÁÁÁÁÁ
Resistor
ÁÁÁÁÁÁÁÁ
330 Ω
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
S1
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Switch
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
NKK
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
G-12AP
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Vcc1
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Batttery Clip
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Keystone
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
1061
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
B1X
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Battery, Lithium
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
3.3-V Coin Cell (2 ea.)
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Panasonic
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
CR2016
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
U1
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Receiver IC
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
TRF1400
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
TI
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
TRF1400
†Tantalum capacitors are rated at 6.3 Vdc minimum.
