CPDC2X1
2X1 GPS Combiner Technical Product DataFeatures•••••Precise Amplitude Balanceo Less than 1 dB variation between ports.
Flat Group Delayo Less than 1ns variation between L1 and L2.
Low Insertion Losso -4.0 dB loss is typical across all operating
frequencies.
Wide Accepted Frequency Rangeo Accepts signals from the entire L-Band,
covering all major GNSS constellations.
Matched Phase Balanceo Less than 2 of variation between ports.

Description
The CPDC2X1 GPS Combiner (GNSS Combiner) is a two input, one output device. The frequency
response covers the entire L-band (all GNSS Frequencies) with excellent flatness. In the standard
configuration, DC is passed from a connected GPS device through the combiner to both inputs(antenna ports). The connected GPS device or receiver will continue to maintain a GPS lock in theevent of an antenna failure. Contact GPS Networking Technical Support for any questions
regarding standard configurations or special configurations at salestech@gpsnetworking.com or
1-800-463-3063.
Use Cases• Combining a signal from two GPS antennas to provide redundancy in case of antenna failure.
• Combining a signal from two GPS antennas to protect against environmental interruptions.
• GNSS-optimized signal combination for laboratory test and measurement.
o 37% less loss than a standard resistive combiner.

Rev A

For sales or technical support contact us at 1-800-463-3063 or salestech@gpsnetworking.com

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CPDC2X1
Electrical Specifications, TA=25C
General Specification
Parameter
Frequency Range
Characteristic
Impedance

Notes

Min

Covers all major GNSS constellations.

1.1

Unused ports should be terminated with 50Ω loads.

TypMaxUnits

1.7GHzΩ50GPS L1 & L2 RF Specification (1)Parameter

Notes

Input SWR

Input Standing Wave Ratio: S11

Output SWR

Output Standing Wave Ratio: S22

Insertion Loss

The loss that occurs from the input port to any output port: S21

Gain Flatness

The difference in loss or gain between the L1 and L2 frequencies.

Amplitude Balance
Phase Balance
Isolation
Group Delay Flatness

Min-3.0

TypMax

Units

2.0:1

-

1.6:1

2.0:1

-

-4.0

-5.0dB

1.0dB

The difference in gain or loss between each output port.

0.1

1.0dB

The difference in phase variation between each output port.

1.5

2.0

deg

The amount of attenuation between two output ports.

L1:24.7
L2:18.7

The difference in signal delay between the L1 and L2 frequencies.

dB
1.0

ns

(1): Performance is slightly reduced around GPS L5. If working on sensitive L5 applications, please request performance data.
External Power Options (Networked Option)
Voltage Input
Style
110VAC
Transformer (ITA Type A Wall Mount)Source Voltage Options
220VAC (Euro)Transformer (ITA Type C Wall Mount)
240VAC (United Kingdom)Transformer (ITA Type G Wall Mount)
Customer Supplied DC 9-32 VDC
MIL-DTL-5015 10SL DC Connector (Includes Mate)DC Voltage Out
Max Current out For Corresponding Vout
3.3V
110mA
5V
130mA
Output Voltage Options (2)

9V

140mA

12V
180mA
15V
220mA
CustomCustomStandard DC Configuration without External Power Option
All ports pass DC
200Ω loads standard for all DC Blocked outputs
Standard DC Configuration with any External Power Option (AC/DC or Military DC)
All DC Blocked Outputs feature 200Ω load in standard configuration
User selected output DC voltage
RF Connector OptionsConnector StyleCharge
Type N-female
No Charge
Type SMA-female
No Charge
Connector Options
Type TNC-female
No Charge
Type BNC-female
No Charge
OtherContact GPS Networking(2): With Network Option, any RF port (input or output) can be specified to Pass DC or Block DC

Rev A

For sales or technical support contact us at 1-800-463-3063 or salestech@gpsnetworking.com

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CPDC2X1
Part Number Configuration

Rev A

For sales or technical support contact us at 1-800-463-3063 or salestech@gpsnetworking.com

3

CPDC2X1Performance
CPDC2x1 Standard Gain Typical
Each CPDC2X1 ships with a test sheet that verifies critical performance characteristics, such as gain,input VSWR, and amplitude balance; a typical VNA test sheet is shown below.

Rev AFor sales or technical support contact us at 1-800-463-3063 or salestech@gpsnetworking.com

4MechanicalContact us at salestech@gpsnetworking.com for 3D models or CAD drawings.