rtd SYNC25104HR User manual

RTD Embedded Technologies, Inc.
AS9100 and ISO 9001 Certified
SYNC25104HR/SYNC35104HR
GPS Disciplined Oscillator with Frequency Synthesizer
User’s Manual
BDM-610020154 Rev. A

RTD Embedded Technologies, Inc.
103 Innovation Boulevard
State College, PA 16803 USA
Telephone: [phone]
Fax: [phone]
www.rtd.com
[e-mail]
[e-mail]

RTD Embedded Technologies, Inc. | www.rtd.com iii SYNC25104HR/SYNC35104HR User’s Manual
Revision History
Rev A Initial Release
Rev B Added Magnetometer 12 position calibration procedure picture.
Added new calibration commands
Added notes which commands require the latest firmware.
Added IDAN connector information
Added COCOM Limits Section
Advanced Analog I/O, Advanced Digital I/O, aAIO, aDIO, a2DIO, Autonomous SmartCal, “Catch the Express”, cpuModule, dspFramewo
rk, dspModule, eBuild, expressMate, ExpressPlatform, “MIL Value for COTS
prices”, multiPort, PlatformBus, and PC/104EZ are trademarks, and “Accessing the Analog World”, dataModule, IDAN, HiDAN, HiDA
Nplus, RTD, the RTD logo, and StackNET are registered trademarks of RTD
Embedded Technologies, Inc. (for
merly Real Time Devices, Inc.). PS/2 is a trademark of International Business Machines Inc. PCI, PCI Express, and PCIe are trademarks of PCI-SIG. PC/104, PC/104-Plus,
PCI
-104, PCIe/104, PCI/104-Express and 104 are trademarks of the PC/104 Consortium. All other trademarks appearing in this document are the property of their respective owners.
Failure to follow the instructions found in this manual may result in damage to the product described in this manual, or othe
r components of the system. The procedure
set forth in this manual shall only be performed
by persons qualified to service electronic equipment.
Contents and specifications within this manual are given without warranty, and are subject to change without notice. RTD Embedded Technologies, Inc. shall
not be liable for errors or omissions in this manual, or for any loss, damage, or injury in connection with the use of this m
anual.
Copyright
© 2022 by RTD Embedded Technologies, Inc. All rights reserved.

RTD Embedded Technologies, Inc. | www.rtd.com iv SYNC25104HR/SYNC35104HR User’s Manual
Table of Contents
1Introduction 7
1.1 Product Overview........................................................................................................................................................................ 7
1.2 Timing Accuracy Information ...................................................................................................................................................... 7
1.3 Board Features ........................................................................................................................................................................... 8
1.4 Ordering Information................................................................................................................................................................... 9
1.4.1 Cable Kits 9
XK-CM57 9
IDAN-XKCM34 9
1.5 Contact Information .................................................................................................................................................................. 10
1.5.1 Sales Support 10
1.5.2 Technical Support 10
2Specifications 11
2.1 Operating Conditions ................................................................................................................................................................ 11
2.2 Electrical Characteristics .......................................................................................................................................................... 11
3Board Connection 13
3.1 Board Handling Precautions ..................................................................................................................................................... 13
3.2 Physical Characteristics............................................................................................................................................................ 13
3.3 Connectors and Jumpers.......................................................................................................................................................... 14
3.3.1 Bus Connectors 14
CN1(Top) & CN2(Bottom): PCIe Connector 14
CN3: PCI Connector (SYNC25104HR Only) 14
3.3.2 External I/O Connectors 14
CN4: Factory Use Only 14
CN5: SyncBus Connector 14
CN6: Any Frequency Output 15
CN7: GPS Antenna Connector 15
CN8: Time Mark Input 15
CN9: 1PPS Output 15
CN10 and CN11: Any Frequency Outputs 15
CN12: 10MHz Output 15
CN13: Serial I/O Connector 15
3.3.3 Jumpers 16
JP1: SyncBus Termination 16
JP2: GPS Antenna Bias 16
3.3.4 LEDs 16
D1: 1PPS LED 16
D2: TBD 16
D3: TBD 16
D4: Loss of Lock LED 16
3.4 Steps for Installing .................................................................................................................................................................... 16
4IDAN Connections 18
4.1 Module Handling Precautions................................................................................................................................................... 18
4.2 Physical Characteristics............................................................................................................................................................ 18
4.3 Connectors................................................................................................................................................................................ 18
4.3.1 Bus Connectors 18
CN1(Top) & CN2(Bottom): PCIe Connector 18
4.3.2 External I/O Connectors 19
Serial Connector - 9-pin “D” PIN Connector 19
GPS, OUT6, OUT7, 10MHZ, 1PPS & TIME IN Antenna - SMA Female Connector 19
OUT2-5 Connector - 15-pin “D” Socket Connector 20
4.4 Steps for Installing .................................................................................................................................................................... 21

RTD Embedded Technologies, Inc. | www.rtd.com vSYNC25104HR/SYNC35104HR User’s Manual
5Functional Description 22
5.1 Block Diagram........................................................................................................................................................................... 22
5.2 Main Modules............................................................................................................................................................................ 22
5.2.1 GPS Module Interface 22
GPS Antenna 23
COCOM Limits 23
LEA-M8F GNSS Receiver Documentation 23
5.2.2 SI5395 Frequency Synthesizer 23
SI5395 Block Diagram 23
6Software 26
6.1 Installing the Software .............................................................................................................................................................. 26
6.2 Software Package Contents ..................................................................................................................................................... 26
6.2.1 GNSS Receiver Software 26
6.2.2 SI5395 Software 26
6.2.3 Syncbus Software 27
7Troubleshooting 28
8Additional Information 29
8.1 PC/104 Specifications............................................................................................................................................................... 29
8.2 PCI and PCI Express Specification .......................................................................................................................................... 29
9Limited Warranty 30

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Table of Figures
Figure 1: Board Dimensions ................................................................................................................................................................................... 13
Figure 2: Board Connections .................................................................................................................................................................................. 14
Figure 3: Example 104™Stack ............................................................................................................................................................................... 17
Figure 4: IDAN Dimensions .................................................................................................................................................................................... 18
Figure 5: IDAN Front Panel .................................................................................................................................................................................... 19
Figure 6: Example IDAN System ............................................................................................................................................................................ 21
Figure 7: SYNC35104 Block Diagram .................................................................................................................................................................... 22
Figure 8: SI5395 block diagram.............................................................................................................................................................................. 25
Table of Tables
Table 1: Accuracy ..................................................................................................................................................................................................... 7
Table 2: Ordering Options ........................................................................................................................................................................................ 9
Table 3: Operating Conditions ................................................................................................................................................................................ 11
Table 4: Electrical Characteristics .......................................................................................................................................................................... 11
Table 5: SyncBus lane assignments....................................................................................................................................................................... 15
Table 6: CN6 Any frequency output........................................................................................................................................................................ 15
Table 7: CN13 RS-232 interface............................................................................................................................................................................. 16
Table 8: JP2 Settings.............................................................................................................................................................................................. 16
Table 9: IDAN-SYNC35104HR Serial Connector................................................................................................................................................... 19
Table 10: IDAN-SYNC35104HR OUT2-5 Connector ............................................................................................................................................. 20
Table 11: SI5395 outputs........................................................................................................................................................................................ 23

RTD Embedded Technologies, Inc.
AS9100 and ISO 9001 Certified
1Introduction
1.1 Product Overview
The SYNC25104HR/SYNC35104HR is a GPS disciplined oscillator board which is designed to provide high accuracy frequency and time
reference signals to PC/104 systems and external devices. This board utilizes the u-blox LEA-M8F GPS Receiver which locks the output signal
of a low noise, high precision oven-controlled crystal oscillator (OCXO) to the GNSS satellites. The 10MHz signal from the OCXO is available
on the SyncBus connector, two MMCX connectors and is fed into a low noise synthesizer (SI5395). The synthesizer can generate signals up to
the gigahertz range. The board connects to the CPU via USB. An additional RS232 serial port is also provided to the GPS receiver which can
be used for synchronizing the CPU clock the GNSS. This module can provide +3.3V to active antennas or can be used with passive antennas.
1.2 Timing Accuracy Information
The board provides time and frequency reference which are based on the GNSS system. When the system is powered up, the board
synchronizes itself to the GNSS. Note that the receiver is only functional, when the normal 5V is available, ie. it is not powered from 5V standby
or other power source (eg. battery). After the synchronization process is complete (this may take minutes) the time and frequency accuracy will
be within the specs below. If GNSS signals are lost, the board enters into holdover mode. In this mode, the internal OCXO provides reference
signal to the receiver, therefore the accuracy will be determined by the OCXO. Table 1 summarizes the accuracy of time and frequency outputs
of SYNC25104HR/SYNC35104HR.
Table 1: Accuracy
Parameter
Condition
Value
Time pulse accuracy
clear sky
≤20ns
Indoor
≤500ns
Frequency accuracy
GNSS locked
≤5ppb
hold-over (-20 to 70C°)
±10ppb
OCXO short term stability (Alan variance)
2×10-10 1/s
OCXO aging
Daily
±1ppb
First year
±100ppb
10-years
±500ppb

RTD Embedded Technologies, Inc. | www.rtd.com 8SYNC25104HR/SYNC35104HR User’s Manual
1.3 Board Features
•PC/104 form factor
•Bus Structure Options:
oPCIe/104 (SYNC35104HR)
PCIe universal expansion bus (Type 1 or Type 2)
oPCI/104-Express (SYNC25104HR)
PCIe universal expansion bus (Type 1 or Type 2)
PCI pass-through expansion bus
•USB 2.0 interface
oGNSS receiver is accessible via a USB serial converter
oSynthesizer is accessible via a USB SPI converter
•u-blox LEA-M8F GNSS engine
oL1 1575.42MHz, C/A code
oL1OF 1602MHz
oBeiDou B1 1561.098MHz
oGalileo E1B/C
o72-channel satellite tracking
oPosition accuracy: 2.5m
oTime accuracy of 20ns
o1Hz update rate
oTracking sensitivity down to -165 dBm
oSupported protocols: NMEA-0183 ver. 2.3, 4.0 or 4.1 configurable, UBX, RTCM 2.3
oConstellation System Support:
GPS
GLONASS
GALILEO
BeiDou
QZSS
oDGPS support:
(SBAS) Satellite-Based Augmentation System
(RTCM) Radio Technical Commission for Maritime Services
(WAAS) Wide-Area Augmentation System
(EGNOS) European Geo-Stationary Navigation System
(MSAS) MTSAT Satellite-Based Augmentation System
(GAGAN) GPS-Aided Geo-Augmented Navigation
•Supports active (+3.3V) and passive antennas
•SI5395 ultra low jitter clock multiplier
o8 any frequency outputs
4 differential outputs on a 100mil header
2 single ended outputs on MMCX connectors
2 differential outputs on the SyncBus connector (Bus LVDS)
oSoftware configurable output standard and frequency
Differential: 100Hz-1028MHz
LVCMOS (single-ended): 100Hz-250MHz
•Requires only +5 VDC for operation

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1.4 Ordering Information
The SYNC35104/SYNC25104 is available with the following options:
Table 2: Ordering Options
Part Number
Description
SYNC35104HR
PCIe/104 GPS disciplined oscillator with frequency synthesizer
SK-SYNC35104HR
Starter Kit including SYNC35104HR, adapter cable, and antenna (XK-
CM##)
SYNC25104HR
PCI/104 Express GPS disciplined oscillator with frequency synthesizer
SK- SYNC25104HR
Starter Kit including SYNC25104HR, adapter cable, and antenna (XK-
CM##)
IDAN- SYNC35104HRS
PCIe/104 GPSDO module in modular IDAN frame
IDAN- SK-SYNC35104HRS
PCIe/104 GPSDO module in modular IDAN frame;
with cables and antennae kit (IDAN-XKCM34)
IDAN- SYNC25104HRS
PCI/104 Express GPSDO module in modular IDAN frame
IDAN-SK- SYNC25104HRS
PCI/104 Express GPSDO module in modular IDAN frame;
with cables and antennae kit (IDAN-XKCM34)
The Intelligent Data Acquisition Node (IDAN™) building block can be used in just about any combination with other IDAN building blocks to
create a simple but rugged 104™ stack. This module can also be incorporated in a custom-built RTD HiDAN™ or HiDANplus®High Reliability
Intelligent Data Acquisition Node. Contact RTD sales for more information on our high reliability systems.
1.4.1 CABLE KITS
XK-CM57
The XK-CM57 is a GPS antenna for use with the stand-alone SYNC25104HR/SYNC35104HR.
•50-Ohm MCX Plug connector
o1.575 GHz Magnetic
o+5 VDC Active Antenna
oMagnetic Base Mount
•Dimensions
oCable length: 16 feet
oHeight: 0.5 inches
oBase: 1.8 inches square
•Weight: < 1 lbs.
•Operating temperature, 90% humidity non-condensing: -40 to +85C
•Storage temperature, -40 to +85C
IDAN-XKCM34
The IDAN-XKCM34 is a GPS antenna for use with the IDAN-SYNC25104HR and IDAN-SYNC35104HR.
•50-Ohm SMA connector
o1.575 GHz Magnetic
o+5 VDC Active Antenna
oMagnetic Base Mount
•Dimensions
oCable length: 16 feet
oHeight: 0.5 inches
oBase: 1.8 inches square
•Weight: < 1 lbs.
•Operating temperature, 90% humidity non-condensing: -40 to +85C
•Storage temperature, -40 to +85C

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1.5 Contact Information
1.5.1 SALES SUPPORT
For sales inquiries, you can contact RTD Embedded Technologies sales via the following methods:
Phone: [phone] Monday through Friday, 8:00am to 5:00pm (EST).
E-Mail: s[email protected]om
1.5.2 TECHNICAL SUPPORT
If you are having problems with you system, please try the steps in the Troubleshooting section of this manual.
For help with this product, or any other product made by RTD, you can contact RTD Embedded Technologies technical support via the
following methods:
Phone: [phone] Monday through Friday, 8:00am to 5:00pm (EST).
E-Mail: [e-mail]

RTD Embedded Technologies, Inc. | www.rtd.com 11 SYNC25104HR/SYNC35104HR User’s Manual
2Specifications
2.1 Operating Conditions
Table 3: Operating Conditions
Symbol
Parameter
Test Condition
Min
Max
Unit
Vcc5
5V Supply Voltage
4.75
5.25
V
Vcc3
3.3V Supply Voltage
n/a
n/a
V
Vcc12
12V Supply Voltage
n/a
n/a
V
Ta
Operating Temperature
-40
+85
C
Ts
Storage Temperature
-55
+125
C
RH
Relative Humidity
Non-Condensing
0
90%
%
MTBF Mean Time Before Failure
Telcordia Issue 2
30°C, Ground benign, controlled
TBD Hours
2.2 Electrical Characteristics
Table 4: Electrical Characteristics
Symbol
Parameter
Test Condition
Min
Typical
Max
Unit
P
Power Consumption
Vcc5 = 5.0V
TBD
W
Icc5
5V Input Supply Current
Active
TBD
A
CN5: SyncBus (M-LVDS)
fmax
Maximum operating frequency
125
MHz
CA, CB
Transceiver IO capacitance
7.8
pF
C
AB
Transceiver IO differential
capacitance
3
pF
Driver mode
VOUT_D
Differential output voltage
RL=50Ω, CL=5pF
480
650
mVp-p
VOUT_CM
Common-mode output voltage
RL=50Ω, CL=5pF
0.3
1.6
2.1
V
Receiver mode
V
IT+
Positive-going differential input
voltage threshold
16
50
mV
V
IT-
Negative-going differential input
voltage threshold
-50
20
mV
CN6: Any frequency output (Differential)
VOUT_D
Differential output voltage
LVDS
700
900
1060
mVp-p
VOUT_D
Differential output voltage
LVPECL
1260
1560
1900
mVp-p
VOUT_CM
Common-mode output voltage
LVDS
1.1
1.2
1.3
V
VOUT_CM
Common-mode output voltage
LVPECL
1.9
2
2.1
V
ROUT
Differential output impedance
100
Ω
tRISE/tFALL
Output rise and fall time
fout>100MHz, 20 to 80%
0.1
0.2
ns
CN7: GPS antenna input
VANT
Antenna bias voltage
IANT=0
3.3
V
IANT
Antenna bias current
50
mA
NF
Receiver noise figure
GPS band
2.6
dB
CN8: Time mark input
VIH
Input high voltage
2.3
3.3
V
VIL
Input low voltage
0
0.66
V
CN9: 1PPS output (LVCMOS 3.3V)
VOH
Output high voltage
IOH=1mA
2.8
V
VOL
Output low voltage
IOL=1mA
0.2
V
ROUT
Output impedance
50
Ω
tRISE/tFALL
Output rise and fall time
CL=5pF
0.35
0.7
ns
V
(ESD)
Electrostatic discharge
HBM ANSI/ESDA/JEDEC
JS-001
±6000
V
V(ESD)
Electrostatic discharge
CBM JESD22-C101
±1500
V
CN10, CN11: Any frequency output (LVCMOS 3.3V)
VOH
Output high voltage
2.8
V

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Table 4: Electrical Characteristics
Symbol
Parameter
Test Condition
Min
Typical
Max
Unit
VOL
Output low voltage
0.5
V
ROUT
Output impedance
44
52
60
Ω
tRISE/tFALL
Output rise and fall time
CL=4.7pF, 20 to 80%
0.4
0.6
ns
CN12: 10MHz output
VOH
Output high voltage
IOH=1mA
3.2
V
VOL
Output low voltage
IOL=1mA
0.1
V
ROUT
Output impedance
50
Ω
tRISE/tFALL
Output rise and fall time
CL=10pF
0.315
ns
CN13: RS232 interface
Maximum data rate
250
kbit/s
VOH
High-level output voltage
RL= 3 kΩ to GND
5
5.4
V
VOL
Low-level output voltage
RL= 3 kΩ to GND
-5
-5.4
V
V
IT+
Positive-going input voltage
threshold
1.5
2.4
V
V
IT-
Negative-going input voltage
threshold
0.6
1.2
V
VI
Input voltage range
-25
25
V

RTD Embedded Technologies, Inc. | www.rtd.com 13 SYNC25104HR/SYNC35104HR User’s Manual
3Board Connection
3.1 Board Handling Precautions
To prevent damage due to Electrostatic Discharge (ESD), keep your board in its antistatic bag until you are ready to install it into your system.
When removing it from the bag, hold the board at the edges, and do not touch the components or connectors. Handle the board in an antistatic
environment and use a grounded workbench for testing and handling of your hardware.
3.2 Physical Characteristics
STEP model is available upon request; contact RTD Tech Support for more information.
•Weight: Approximately 80 g (0.18 lbs.)
•Dimensions: 90.17 mm L x 95.89 mm W (4.570 in L x 3.775 in W)
Figure 1: Board Dimensions

RTD Embedded Technologies, Inc. | www.rtd.com 14 SYNC25104HR/SYNC35104HR User’s Manual
3.3 Connectors and Jumpers
Figure 2: Board Connections
3.3.1 BUS CONNECTORS
CN1(Top) & CN2(Bottom): PCIe Connector
The PCIe connector is the connection to the system CPU. The position and pin assignments are compliant with the PCI/104-Express
Specification. (See PC/104 Specifications on page 29)
The SYNC35104/25104 is a “Universal” board and can connect to either a Type 1 or Type 2 PCIe/104 connector.
CN3: PCI Connector (SYNC25104HR Only)
The PCI connector is the connection to PCI peripheral modules. This connector is used only as a pass through connector on this board.
3.3.2 EXTERNAL I/O CONNECTORS
CN4: Factory Use Only
Do not connect anything to this header.
CN5: SyncBus Connector
CN5 is a proprietary 16-pin header that is used for synchronizing RTD data acquisition and signal processing boards. The SyncBus Connector
is a 2 x 8, 0.1” spacing right-angle connector. The lane assignments are shown in Table 5. A typical mating connector is an FCI 65043-029LF.
Pin 1 is indicated by a square solder pad. SyncBus is based on bus-LVDS technology, appropriate termination of the bus is necessary at the
two ends. If this board is on either end of the bus JP1 should be fitted.
CN5: SyncBus
CN13: RS232
CN9: 1PPS
output
CN3: PCI-104 Connector
(SYNC25104 Only)
CN1 & CN2: PCIe Connector
CN6: Any frequency
output (4x differential)
CN7: GPS antenna
JP2: GPS antenna
bias
CN8: Time mark
input
CN12: 10MHz
output
CN11: Any freq.
out. 2
CN10: Any freq.
out. 1

RTD Embedded Technologies, Inc. | www.rtd.com 15 SYNC25104HR/SYNC35104HR User’s Manual
Table 5: SyncBus lane assignments
SyncBus lane
Description
0
1 PPS signal
1
SI5395 output 1
2
SI5395 output 0
3
10MHz
CN6: Any Frequency Output
CN6 is a 16-pin header which connects to 4 outputs of the SI5395 clock synthesizer chip. The outputs can be configured by the Silabs CBPro
software and the configuration file can be downloaded to the chip by the supplied software. The outputs are DC coupled. Note that it is
theoretically possible to use these outputs as single ended, it is recommended to use them for differential signaling only. For single-ended
signals use CN10 and CN11. Table 6 lists the pinout of the connector, the names correspond to the outputs of SI5395. When interfacing to this
connector it is recommended to minimize the length of cable and route it inside a shielding metal enclosure. If it is necessary to run the cable
several feet or further, it is recommended to use shielded cable (eg. SFTP).
Table 6: CN6 Any frequency output
Pin Name
Pin #
Pin #
Pin Name
Output 5-
2
1
Output 5+
GND
4
3
GND
Output 4-
6
5
Output 4+
GND
8
7
GND
Output 3-
10
9
Output 3+
GND
12
11
GND
Output 2-
14
13
Output 2+
GND
16
15
GND
CN7: GPS Antenna Connector
The SYNC35104HR/25104HR provides an MCX connector for the GPS antenna. The 3.3V antenna bias can be turned on or off using JP2.
CN8: Time Mark Input
The LEA-M8F module can also be used for precise time measurements using the Time mark input. Rising edges of these signals are time-
stamped with respect to the receiver’s active time-base. Time-stamps are reported in the UBX-TIM-TM2 message. CN8 connects to
FREQ_PHASE_IN1 of the u-blox GNSS receiver module.
CN9: 1PPS Output
CN9 is a 1PPS output which is buffered by a low propagation delay buffer. The output is DC coupled, has 50Ω impedance, its level is 3.3Vpp.
The total delay from the GNSS receiver’s output pad to the connector is 1.94ns typical 2.44ns maximum.
CN10 and CN11: Any Frequency Outputs
CN10 and CN11 are coaxial sockets which connect to SI5395 clock synthesizer chip. The outputs can be configured by the Silabs CBPro
software and the configuration file can be downloaded to the chip by the supplied software. The outputs are DC coupled and the level is 3.3Vpp
when using LVCMOS output buffer setting (recommended) and the output is not terminated. If differential signaling is required use CN6.
CN12: 10MHz Output
CN12 is a buffered output of the oven-controlled crystal oscillator (OCXO). This output is DC coupled, has 50Ω impedance, and the level is
3.3Vpp.
CN7-CN12 are MMCX connectors:
Connector Part #: Amphenol 908-22106
Example Mating Connector: Amp 901-9877-RFX
CN13: Serial I/O Connector
CN12 is an RS-232 interface that is connected to the GPS receiver. Table 7 has the pin-out. RX and TX lines are connected according to the
DCE pinout (ie. RX is a driven output, TX is an input). RI, DCD and DSR pins are connected together and driven by 1pps signal. This can be
used by various software to synchronize the internal clock of the CPU. This serial port is also routed to the USB-serial converter. The TX output
of the GPS receiver is permanently connected to the RX input of the USB-serial converter, and the RX pin of CN12. The GPS RX however has
a signal switch which is activated whenever a byte is transmitted from the USB. When there is no transmission from the bus, the RX is switched
to the RS232 TX input. RTS and DTR pins are not used and are pulled to GND with 10k. CTS is not connected.

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Table 7: CN13 RS-232 interface
Pin Name
Pin #
Pin #
Pin Name
DSR (1PPS)
2
1
DCD (1PPS)
RTS (PD)
4
3
RxD
CTS (NC)
6
5
TxD
RI (1PPS)
8
7
DTR (PD)
GND
10
9
GND
3.3.3 JUMPERS
JP1: SyncBus Termination
JP1 is used to enable termination resistor on SyncBus lanes.
JP2: GPS Antenna Bias
JP2 is used to switch antenna bias on or off. Table 8.
Table 8: JP2 Settings
Setting
Description
Notes
1 – 2
3.3V Bias Antenna
Factory default
Open
Passive Antenna
3.3.4 LEDS
D1: 1PPS LED
D1 shows the status of the GPS’s 1PPS signal.
D2: TBD
Function TBD.
D3: TBD
Function TBD.
D4: Loss of Lock LED
Indicates the lock status of SI5395.
3.4 Steps for Installing
1. Always work at an ESD protected workstation and wear a grounded wrist-strap.
2. Turn off power to the PC/104 system or stack.
3. Select and install stand-offs to properly position the module on the stack.
4. Remove the module from its anti-static bag.
5. Check that pins of the bus connector are properly positioned.
6. Check the stacking order; make sure all of the busses used by the peripheral cards are connected to the cpuModule.
7. Hold the module by its edges and orient it so the bus connector pins line up with the matching connector on the stack.
8. Gently and evenly press the module onto the PC/104 stack.
9. If any boards are to be stacked above this module, install them.
10. Attach any necessary cables to the PC/104 stack.
11. Re-connect the power cord and apply power to the stack.
12. Boot the system and verify that all of the hardware is working properly.

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Figure 3: Example 104™Stack

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4IDAN Connections
4.1 Module Handling Precautions
To prevent damage due to Electrostatic Discharge (ESD), keep your module in its antistatic bag until you are ready to install it into your system.
When removing it from the bag, hold the module by the aluminum enclosure, and do not touch the components or connectors. Handle the
module in an antistatic environment and use a grounded workbench for testing and handling of your hardware.
4.2 Physical Characteristics
•Weight: Approximately 0.21 Kg (0.46 lbs.)
•Dimensions: 152.0 mm L x 130.0 mm W x 23.7 mm H (5.98 in L x 5.12 in W x 0.94 in H)
Figure 4: IDAN Dimensions
4.3 Connectors
4.3.1 BUS CONNECTORS
CN1(Top) & CN2(Bottom): PCIe Connector
The PCIe connector is the connection to the system CPU. The position and pin assignments are compliant with the PCI/104-Express
Specification. (See PC/104 Specifications on page 29)
The SYNC25104HR is a “Universal” board and can connect to either a Type 1 or Type 2 PCIe/104 connector.

RTD Embedded Technologies, Inc. | www.rtd.com 19 SYNC25104HR/SYNC35104HR User’s Manual
4.3.2 EXTERNAL I/O CONNECTORS
The figure below shows the pin orientation of the connectors on the IDAN-SYNC35104HR.
Figure 5: IDAN Front Panel
Serial Connector - 9-pin “D” PIN Connector
Connector Part #: VALCON DF-9P-CN
Example Mating Connector: Amp 1658610-4
Table 9: IDAN-SYNC35104HR Serial Connector
IDAN Pin#
Signal(RS-232)
(RS-232)
SYNC25104HR Pin #
1
DCD
-
CN13
1
2
RxD
RxD-
CN13
3
3
TxD
TxD-
CN13
5
4
DTR
-
CN13
7
5
GND
GND
CN13
9
6
DSR
-
CN13
2
7
RTS
TxD+
CN13
4
8
CTS
RxD+
CN13
6
9
RI
-
CN13
8
GPS, OUT6, OUT7, 10MHZ, 1PPS & TIME IN Antenna - SMA Female Connector
Connector Part #: SPC Technology 8589-0853
Example Mating Connector: Amp 901-9877-RFX
Pin 1
Pin 6
Pin 9
Pin 5

RTD Embedded Technologies, Inc. | www.rtd.com 20 SYNC25104HR/SYNC35104HR User’s Manual
OUT2-5 Connector - 15-pin “D” Socket Connector
Connector Part #: Amp 1658610-3
Example Mating Connector: Amp 1-747956-5
Table 10: IDAN-SYNC35104HR OUT2-5 Connector
IDAN Pin#
Signal
SYNC25104HR Pin #
1
Output 5+
CN6
1
2
GND
CN6
3
3
OUTPUT 4+
CN6
5
4
GND
CN6
7
5
OUTPUT 3+
CN6
9
6
GND
CN6
11
7
OUTPUT 2+
CN6
13
8
GND
CN6
15
9
Output 5-
CN6
2
10
GND
CN6
4
11
OUTPUT 4-
CN6
6
12
GND
CN6
8
13
OUTPUT 3-
CN6
10
14
GND
CN6
12
15
OUTPUT 2-
CN6
14
16
GND
CN6
16
Figure 6: IDAN Back Panel
PIN 1
PIN 8
PIN 9
PIN 16