ALDCBS1X4GPS Amplified 1X4 Splitter Technical Product DataFeatures••••••

Excellent Gain Flatness
o Less than 1 dB variation between ports.
Flat Group Delayo Less than 1ns variation between L1 and L2.
High Output Gaino 18.5 dB gain is typical across all operatingfrequencies.
Wide Accepted Frequency Rangeo Accepts signals from the entire L-Band,
covering all major GNSS constellations.
Efficiently Blocked Ports
o Uses 200Ω resistors to prevent antenna
alarm faults from connected devices.
Matched Phase Balanceo Less than 1° of variation between ports.

Description
This Amplified Loaded DC Blocked Splitter 1X4 (ALDCBS1X4) is an active one input, four output RFsplitter that splits signals from 1.1 GHz to 1.7 GHz. This equipment is designed to amplify and split
signals within the L-band to provide multiple devices with the signal from a single antenna. In thestandard configuration, the J1 port will pass DC voltage from a connected device and pass this power
to the antenna or other devices upline from the splitter via the antenna port. The other ports (J2-J4)
are DC blocked and loaded with 200Ω resistors to simulate antenna current draw which prevents
antenna alarm faults. Custom gain configuration, DC configuration, and connector configuration areavailable upon request.
Use Cases• Splitting and amplifying a roof antenna signal between 4 GPS/GLONASS/GNSS receivers.
• Splitting and amplifying WAAS antenna between WASS receiver, ADS-B, and 2 other devices.
• Splitting and amplifying an antenna signal to 4 passive antennas to re-radiate 4 spaces.
• Usable as a small part of a larger signal distribution network.

Rev A

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

1ALDCBS1X4

Electrical Specifications, TA=25°C
General Specification
Parameter
Frequency Range

Notes
Covers all major GNSS constellations.

Characteristic
Impedance

Unused ports should be terminated with 50Ω loads.

Current Draw
Amplitude Balance

Typical current consumption.
The difference in gain or loss between each output port.

GPS L1 & L2 RF Specification

Min
1.1

TypMax
1.7

Unit
GHz50Ω
23
1.0mAdBParameter

NotesMin

TypMaxUnit

Gain

The relative increase in signal power provided by the amplifier.

1718.520dB

Input SWR

Input Standing Wave Ratio: S112.0:1-Output SWR

Output Standing Wave Ratio: S22

1.8:1-L1 Noise Figure

The increase in noise power relative to an ideal amplifier.

2.5

3.25

dB

Gain Flatness

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

0.5

1dB

Amplitude Balance

The difference in gain or loss between each output port.

1.0dB

Phase Balance

The difference in phase variation between each output port.

1.0degIsolation

The amount of attenuation between two output ports.

Group delay flatness

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

Input P1dB

The 1dB compression point.

Amplitude Balance

The difference in gain or loss between each output port.

L2:15
L1:22

dB
1-24

nsdBm

1.0

dB

External Power Options (Networked Option)
Voltage Input
Source Voltage Options

Output Voltage Options (1)Style

110VAC

Transformer (ITA Type A Wall Mount)

220VAC

Transformer (ITA Type C Wall Mount)

240VAC (United Kingdom)Transformer (ITA Type G Wall Mount)

Customer Supplied DC 9-32 VDC

Mil DC Connector (Includes Mate)DC Voltage Out
3.3 V

Max Current out For Corresponding Vout
110mA

5V

130mA

9V

140mA

12V

180mA

15V

220mA

CustomCustomStandard DC Configuration without External Power Option
J1/Output 1 Pass DC, J2-J4/Output 2-4 Block DC, Input Pass DC
Standard DC Configuration with any External Power Option (AC/DC or Military DC)
All Outputs DC Blocked with 200Ω load standard
Any port can be custom selected to Pass or Block DCConnector Options

Rev AConnector Style
Type N-female

ChargeNo ChargeType SMA-female

No Charge

Type TNC-female

No Charge

Type BNC-female

No Charge

OtherContact GPS Networking(1) With Network Option, any RF port (input or output) can be specified to Pass DC or Block DC
For sales or technical support contact us at 1-800-463-3063 or salestech@gpsnetworking.com

2

ALDCBS1X4

Part Number Configuration

Rev A

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

3

ALDCBS1X4
Performance

ALDCBS1X4 (Standard Gain, typical)
Each ALDCBS1X4 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.