TECHNICAL PRODUCT DATA SHEET

L1FM-HRL1 Filter, High Rejection

DESCRIPTION
Designed with the thin link margins of satellite
navigation systems in mind, the L1FM-HR Passive
Filter is a 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 L1FM Passive Filter comes with High Rejection
standard.

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

OPTIONS
The L1FM-HR can be custom configured. Pleasecontact GPS Source for further information on productoptions and specifications.

L1FM-HR Passive Filter Data Sheet
059-FFL-AAM-AAX-AGZ-005
1/20/2017www.gpssource.com

AS9100C:2009 and ISO 9001:2008 Compliant Company

1

L1FM-HR Electrical Specifications
Table 1-1.

Electrical Specifications

Operating Temperature -40°C to 85°C
ParameterConditions

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503± 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:

Min

VDC

mAdBm

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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L1FM-HR Passive Filter Data Sheet
059-FFL-AAM-AAX-AGZ-005
1/20/2017

2Performance Data

2.1

L1FM-HR
Figure 2-1.

Gain vs. Frequency

Figure 2-2.

SWR vs. Frequency

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L1FM-HR Passive Filter Data Sheet
059-FFL-AAM-AAX-AGZ-005
1/20/2017

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3

Product Options
Table 3-1.

L1FM-HR Available Options

Power Supply
Voltage Input

Type110VAC

Wall Mount Transformer

220VAC

Wall Mount Transformer

240VAC (U.K.)

Wall Mount Transformer

DC 5VDC to 28VDC

Military Style Connector or Tinned Leads

Source Voltage

DC Voltage Out(2)3.3
5.0

Output Voltage (1)

7.5
9.0
12.0

RF Connector
Connector TypeConnector

Limitations

N(Female/Male)N/ASMA(Female/Male)

N/A

TNCFemale/Male)

N/A

Housing
HousingPort

Limitations

MiniNone(1)

Configuration
Notes:

Housing Type1.
2.

Pass DC(1)(1)

DC Blocked

IN Port Passes DC
IN Port Blocks DC

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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L1FM-HR Passive Filter Data Sheet
059-FFL-AAM-AAX-AGZ-005
1/20/2017

4

Product Code Decoder
L 1 F M - H R - X - P 11 0 / 5 - N F
Filter
L1FM-HR = L1 Band High Rejection

Connector Option
NF
SF
TF
NM
SM
TM======N ....................Female
SMA ................Female
TNC ...............Female
N .....................Male
SMA ................Male
TNC ................Male

Environmental Option(s)X = Any or all of the following
E = EMI Shielding
W = Waterproof
HS = Hermetically Sealed
Leave Blank if NoneOutput Voltage
3.35
7.5
912=
=
=
=
=

3.3V
5.0V
7.5V
9.0V
12.0V

Source Voltage
P110
P220
P240
PDCPMPMS

=
=
=
=
=
=

Transformer
Transformer
Transformer
DC with Quick Connects
Military Connector (User Supplies DC)
Military Connector (User Supplies DC)

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L1FM-HR Passive Filter Data Sheet
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5Mechanical Drawing

Revision 002
GPS Source Part No.

FinishFFL-AAA-AAX-AGZ
Description

L1 Mini Filter

Size

N/AMassCTolerances
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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L1FM-HR Passive Filter Data Sheet
059-FFL-AAM-AAX-AGZ-005
1/20/2017

L1FM-HR Passive Filter Data Sheet
059-FFL-AAM-AAX-AGZ-005
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 CompanyX X© 2017 GPS Source, Inc. All rights reserved.

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