L1FPDC
GPS L1 Filter Technical Product DataFeatures••••

Low Insertion Losso 1.75 dB typical.
High Rejectiono Greater than 35 dB typical at GPS L1 ±60 MHzLow Rippleo Less than 0.5 dB typical @ 1575.42
MHz ± 12 MHz.
Compatible with GPS, GALILEO, BeiDou, andQZSS L1 GNSS signals.

Description
This L1 Filter Pass DC (L1FPDC) is a one input, one output passive RF filter for the L1 GPS signal.
This equipment is designed to provide additional filtering and protection for GNSS signals centeredaround 1575.42 MHz, including GALIELO, BeiDou, and QZSS. The L1FPDC features low insertion
loss, low ripple, and high rejection. In the standard configuration, the J1 port passes DC voltage froma connected device to the antenna through the ANTENNA port. Custom DC configuration andconnector configuration are available upon request.

Use Cases• To protect an L1 receiver from out-of-band interference.
• As part of a receiver test and measurement setup in a lab environment.

Rev A

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

1

L1FPDCElectrical Specifications, TA=25C
General Specification
Parameter

Notes

Min

Frequency Range

Covers all major GNSS constellations.

1.556

Characteristic
Impedance

Unused ports should be terminated with 50Ω loads.

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

Input SWR

TypMax

Unit

1.592

GHzΩ

50

-1.25

-1.75

-2.5dB

Input Standing Wave Ratio: S11

2.0:1

-

Output SWR

Output Standing Wave Ratio: S22

2.0:1-Bandwidth

The 3dB bandwidth of the filter.

3625

Rejection

Rejection at L1 ± 60 MHz

RipplePassband Amplitude Ripple at L1 ± 12 MHz

Max DC Input V.

Maximum Input Voltage Range.

50VDC

Max Current

Maximum through current.

400mA

Source Voltage Options

35MHz>45

0.5dBdB

External Power Options (Networked Option)
Voltage Input
110VAC
220VAC240VAC (United Kingdom)
Customer Supplied DC 9-32 VDC

Style
Transformer (ITA Type A Wall Mount)
Transformer (ITA Type C Wall Mount)
Transformer (ITA Type G Wall Mount)
MIL-DTL-5015 10SL DC Connector (IncludesMate)DC Voltage Out
Max Current out For Corresponding Vout
3.3 V
110mA
5V
130mA
9V
140mAOutput Voltage Options (2)
12V
170mA
15V
210mA
CustomCustom
Standard 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 DC

Connector Options

Connector Style
Type N-female

ChargeNo Charge

Type SMA-female

No Charge

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

2

L1FPDCPart Number Configuration

Rev A

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

3

L1FPDC
Performance
L1FPDC
Each L1FPDC 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 A

For 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.