TECHNICAL PRODUCT DATA SHEET

L1FT
L1 Tiny Filter

DESCRIPTION
Designed with the thin link margins of satellite
navigation systems in mind, the L1FT Passive Filter isa single input L1 High Rejection Band Passive Filter
that passes only the L1 frequencies. The device
features excellent side band rejection with an insertion
loss of less than 4.0dB. The product may pass DC or
can also be used as a DC block.
The L1FT Passive Filter comes with High Rejection
standard.

FEATURESGPS L1 Band
Excellent Out of Band Rejection
Passes DC for Active Antennas

OPTIONS
The L1FT can be custom configured. Please contact
GPS Source for further information on product options
and specifications.

L1FT Passive Filter Data Sheet
059-FFL-ABT-CCX-AGZ-003
1/20/2017www.gpssource.com

AS9100C:2009 and ISO 9001:2008 Compliant Company

1

L1FT Electrical Specifications
Table 1-1.

Electrical Specifications

Operating Temperature -40°C to 85°C
Parameter

Conditions

Frequency Range

IN – OUT, IN/OUT 50

In/Out Impedance

IN, OUT

Insertion Loss

IN – OUT, IN/OUT 50

1575MHzRejection

IN – OUT, IN/OUT 50

1575MHz

Input SWR

OUT Port 50

2:1—Output SWR

IN Port 50

2:1—Pass DCDC IN
Ant/ThruCurrent

1.
2.
3.

1575.4MHz

Typ

1.56

MaxUnits

1.59

GHz
50
3± 75MHz-35± 100MHz

-35

3.7

4.4

316

PoweredPowered, Military Connection or Quick Connect Option

(1)

28(2)

Pass DC

Non-Powered Configuration, DC Input on OUT port

250

Max RF Input Without Damage

30

3dBdB

Non-Powered Configuration, DC Input on OUT port

Max RF Input
Notes:MinVDCmAdBm

DC IN for powered option must be 2V greater than desired DC Voltage Out.
Maximum DC IN is 35V when 1275B powered option is included.
Maximum combined DC current draw out all ports of the device is a function of the DC input voltage and desired
DC output voltage according to the following: Iout  1.4 / (VDC IN – VDC OUT ) – 0.007A.
For powered option with a wall mount transformer: (Voltage Input = 110/220/240VAC), VDC IN is 9V.

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L1FT Passive Filter Data Sheet
059-FFL-ABT-CCX-AGZ-003
1/20/2017

2

Performance Data

2.1

L1FTFigure 2-1.

Gain vs. FrequencyFigure 2-2.

SWR vs. Frequency

Page 3 of 7
L1FT Passive Filter Data Sheet
059-FFL-ABT-CCX-AGZ-003
1/20/2017

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3

Product Options
Table 3-1.

L1FT Available Options

RF Connector
Connector TypeConnector

SMA

Housing(Female/Male)

Limitations
N/A

Housing Type

Limitations

Tiny

None

Pass DC(1)IN Port Passes DC

DC Blocked(1)IN Port Blocks DC

Port (1)Configuration
Notes:

1.
2.

Powered Option: any or all RF ports (input or output) can be DC Blocked or can pass the powered DC voltage.
Maximum combined DC current draw out all ports of the device is a function of the DC input voltage and desired
DC output voltage according to the following:
lout  1.4 / (VDC IN – VDC OUT) – 0.007 Amps (or 250mA max)
For powered option with a wall mount transformer (Voltage Input = 110/220/240VAC), VDC IN is 9V.

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L1FT Passive Filter Data Sheet
059-FFL-ABT-CCX-AGZ-003
1/20/2017

4Product Code Decoder
L1FT-X-SF
Filter
L1FT = L1 Band High Rejection
Tiny Housing

Connector Option
SM = SMA ................Male
SF = SMA ................Female

Environmental Option(s)X = Any or all of the following
E = EMI Shielding
W = Waterproof
HS = Hermetically Sealed
Leave Blank if None

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L1FT Passive Filter Data Sheet
059-FFL-ABT-CCX-AGZ-003
1/20/2017

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5Mechanical Drawing

FOR REFERENCE ONLY

Revision 002
GPS Source Part No.

FinishFFL-ABT-CCX-AGZ
Description

L1 Tiny Filter

Size

N/A

MassCTolerances
LinearAngular

3rd Angle Projection

Material

N/A

All materials and finishes shall comply with European Union RoHS and are lead free. Dimensions are in inches unless otherwise specified.

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L1FT Passive Filter Data Sheet
059-FFL-ABT-CCX-AGZ-003
1/20/2017

L1FT Passive Filter Data Sheet
059-FFL-ABT-CCX-AGZ-003
Page 7 of 7, 1/20/2017

64 N. Mission Drive
Pueblo West, CO 81007
Phone: (+1)(719) 561.9520
Fax: (+1)(719) 565.0890
techsales@gpssource.com
www.gpssource.com
AS9100C:2009 and ISO 9001:2008 Compliant Company

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