MS14 Regular Housing
Military Qualified 1x4 GPS Splitter
Options
n Filtered Option Available
n Variable Gain Option Available: 0dB to 39dB
n EMI shielding, waterproofing, hermetically sealed

The MS14 splitter comes with many available options to meet specificneeds. Please contact GPS Source via phone, email, or visit the website
for further information on product options and specifications.

MS14 Specifications
Electrical Specifications
Operating Temperature -40oC to 85oC

Description
The MS14 is a military qualified, one-input four-output
GPS splitter. Typically applications is where an input froman active GPS roof antenna is split evenly between four
receiving GPS units. The MS14 can be configured to passDC from an RF output (J2) to the antenna input port inorder to power an active GPS antenna on that port. The
remaining RF outputs (J3, J4, and J5) would feature a200Ω DC load to simulate an antenna DC current draw
for any receiver connected to that port. Alternatively,
the MS14 can be configured with a MIL-STD-704 orMIL-STD-1275 compliant 28V DC Power Supply that willpower the active GPS antenna connected to J1.

Featuresn Designed and Manufactured to Military Specifications
n Passes GPS (including M Code), Galileo, GLONASS L1/L2
n Excellent Gain Flatness (Gain |L1 - L2 | < 2dB)

ParameterConditions

Min

Type Max Units

Frequency Range

Ant: Any Port; Unused
Ports: 50 Ω11.7

Standard Amplified Ant: Any Port; Unused
Ports: 50 Ω91011X-1

X

X +1

6.5

7.5

8.5dB

Gain

CustomMIL Standards
MIL-STD-810

MIL-STD-5400

MIL-STD-1472

MIL-HDBK-454

MIL-STD-202

MIL-STD-1587

MIL-STD-883

MIL-STD-461F

MIL-STD-704

MIL-STD-1275E

dB

Loss-Passive

Ant: Any Port; Unused
Ports: 50 Ω

Input SWR

All Ports: 50 Ω2.0:1—Output SWR

All Ports: 50 Ω2.0:1—10dB Gain Amplified Ant: Any Port; Unused
Ports: 50 Ω3dB

Gain Flatness

Amplified [L1 – L2] Ant: Any Port;
Passive Unused Ports: 50 Ω

2Amp. Balance(J2 – J5) Ant: Any Port:
Unused Ports: 50 Ω0.5

dB

Phase Balance

Phase (J2 – J5) Ant: Any
Port; Unused Ports: 50 Ω

1.0DegreeGroup Delay Flatness

Td,max - Td,min; J2 – J1(Ant)1ns

NoiseFiguren Amplified and Passive Options

The MS14 is for military applications and environments
where high reliability is required. It has been designed tothe following MIL standards.

Amplified As Specified (xdB, from 0to 10dB)

GHzIsolation

1NormalAdjacent Ports Ant - 50Ω
10dB Gain Amp/Pass Opposite Ports: Ant – 50 Ω

1624

Adjacent Ports Ant - 50Ω
Amplified Opposite Ports: Ant – 50 Ω
1MHz Tone Spacing

2731High 3dB
GaindBdB

Amplified

Ant: Any Port; UnusedPorts: 50 Ω
1MHz Tone Spacing

10dBmInput P1dB Amplified

Ant: Any Port; Unused
Ports: 50 Ω-6dBm

Current (Iinternal)

Current Consumption ofdevice (excludes Draw)

45

Input Ip3

Draw
Current

50

Pass DC

Non-PoweredConfiguration, DC Input
on J2250

PoweredPowered MIL DC 1275E
or 70475

Max RF Input

Amplified Max RF Input Without
Passive Damage

mAmA

2040dBm

MS14

DC IN aEd OUT Specifications

Operating Temperature -40oC to 85oC
Conditions

Parameter
DC Block
DC In

DC OutPass DCMin

TypePassive

Non-Powered Configuration, DC Input on J2Units

14Any DC Blocked Port with a 200Ω LoadAmplifiedMax5

7.5

3.316

PoweredMilitary Connector MIL-STD-704 Normal andEmergency Conditions

16

Powered Amplified

Military Connection; Ant thru Current 75mA

528

VDC32 (1)
7.5

VDCNotes: 1. The 1275E spike and surge protection assumes a 28V system, 33.3V, or greater which will trigger
over the voltage protection circuitry.
2. DC output voltage to the antenna port (J1) can be customized to 5V or 7.5V (5V default).

Power Military Connectors PMS-1275/XX and PMS-704/XX Option
Input

Description

A

Positive

B

GroundPMS-1275/XX and PMS-704/XX Options (2)Note: 1. Image is not to scale.

Power Military Connector MS38999-1275/XX andPMS38999-704/XX Option
Input

Description

A

Positive

BGroundCNo Connect

PMS-1275/XX and PMS-704/XX Options (2)Note: 1. Image is not to scale.

General Specifications
Description

Measurement

Weight0.624lbs (283g)

Mean Time Between
Failure (MTBF)(1)

Passive
Configuration

389,029 at 29°C

ActiveConfiguration

386,259 at 29°C

350,812 at 71°C
316,877 at 71°C

Note: 1. Calculation derived using Airborne Inhabited Cargoparameters per MIL-STD-217F

MS14

Performance DataMS14 — Passive

Environmental Requirements
3.1 Temperature and Altitude
The MS14 complies with the temperature-altitude tests per MILSTD-810C, Method 504, Procedure 1 Equipment Category 5.
3.2 Temperature ShockThe MS14 is designed to withstand without degradation (whilenot operating) Method 503.1, Procedure I of MILSTD810C.
3.3 Explosive Atmosphere
The MS14 is designed for operation in the presence of explosive
mixtures of air and jet fuel without causing explosion or fire atatmospheric pressures corresponding to altitudes from -1,800ft
to 50,000ft. The MS14 does not produce surface temperaturesor heat in excess of 400 F. The MS14 does not produce
electrical discharges at an energy level sufficient to ignite theexplosive mixture when the equipment is turned on or off oroperated. The MS14 meets the requirements of MIL-STD-810C,
Method 511.1, and Procedure II. Hermetically sealed equipment
meeting the Requirements of MIL-STD-202, Method 112D, orMIL-STD-883, Method 1014.7 (as applicable), and not exceedinga Helium leakage rate of 1 x 10-7cc/s are exempt from thisrequirement.
3.4 Decompression

2.2 MS14—Active

The MS14 is designed to meet the performance standards perRTCA-DO-160E para 4.6.2 cat D during and following a rapid
and complete loss of normal cabin compartment pressurization(10,000 feet) from an airplane flight altitude of 50,000 feet within
15 seconds. The MS14 will remain operating for five minutes at
50,000 feet before being returned to normal cabin pressure.
3.5 Overpressure
MS14 is capable of withstanding for 10 minutes while notoperating. A 12.1 PSI compartment pressure with no physicaldistortion or permanent set RTCA-DO-160E PARA 4.6.3. The
MS14 will operate satisfactorily upon return to normal pressure.
3.6 Salt Fog
The MS14 is designed to meet the requirements of Salt Fog
conditions per Paragraph 3.2.24.9 of MIL-E-5400 and MIL-STD810C Method 509.1. The MS14 is designed to withstand a salt
concentration of five percent at a temperature of 35 C for 48
hours without degradation.
3.7 Fungus
The MS14 is designed to meet the requirements of Fungus
conditions per Paragraph 3.2.24.8 of MIL-E-5400 i.e. fungus
inert materials per requirement 4 of MIL-HDBK-454.
3.8 Humidity
The MS14 is capable of meeting the requirements of a ten-day
humidity test conducted per MIL-STD-810C, Method 507.1;
Procedure I. MS12 is designed to withstand exposure to 95%
relative humidity at a temperature of 30 C for 28 days.

MS14

3.9 Sand and Dust
The MS14 is capable of meeting the requirements of Sandand Dust conditions of method 510 of MIL-STD-810C, for atemperature of 145 F for a duration of 22 hours.

STD-595 (Exceptions: bottom and connector surfaces are free ofpaint).

3.10 Flammability

Human Engineering principles and criteria (includingconsiderations for human capabilities and limitations) using
MIL-STD-1472 in all phases of design, development, testing, andprocedures development. The design is free of all sharp edges,according to MIL-STD-1472.

The MS14 is self-extinguishing or nonflammable and is designed
to meet the Requirements of Paragraph 5.2.4 of MIL-STD-1587
and Requirement 3 of MIL-HDBK-454.
3.11 Finish and Colors
All case surfaces of the MS14 are treated with chemical film per
MIL-DTL-5441, TYPE II, CLASS 3. The MS14 bottom contact
surface is free of paint or non-conductive finishes. The MS14
bottom contact surfaces are protected rom corrosion by aconductive coating (MIL-DTL-5541). All other surfaces, except
connector mating surfaces are primed per MIL-PRF-23377, TYPE
1 CLASS C and painted per MIL-PRF-85285, TYPE 1 COLORNUMBER (26231), Military Gray (not lusterless variety) per FED-

3.12 Human Factors

3.13 Electromagnetic Interference and Compatibility Test
MS14 performs its intended function and operation does notdegrade the performance of other equipment or subsystems.
The following table defines the test requirements and test
procedures for conducting the required electromagnetic
compatibiity testing. The MS14 is designed and tested to meetthe requirements of MIL-STD-461F:

Table 3-1 Test Requirements & Procedures
TestDescription

CE102

Conducted Emissions Power Leads

10kHz to 10MHz

CE106

Conducted Emissions Antenna Terminal

10kHz to 31.5GHz

CS101

Conducted Susceptibility Power Leads

30Hz to 150kHz

CS103

Conducted Susceptibility Antenna PortIntermodulation

CS105

Conducted Susceptibility Antenna Port

Cross-Modulation

CS114

Conducted Susceptibility Bulk Cable Injection

10kHz to 200MHz

RE102

Radiated Emissions Electric Field

10kHz to 18GHz

RS103

Radiated Susceptibility Electric Field

2MHz to 18GHz

Indirect Lightning(1)Damped Sinusoidal transients,

RF Leads,10kHz to 100MHz
Power Leads,10kHz to 100MHz

Note: 1. For additional detail regarding Indirect Lightning, please contact GPS Source.
3.14 ShockThe MS14 is designed to withstand the shock levels specified in the saw tooth shock pulse parameter specified in
Figure 3-1 and Table 3-2. It is designed to meet the requirements of MIL-STD-810C Method 516.2 Proc. III.

MS14

Table 3-2. Peak Shock Levels
Flight Vehicle Equipment

TestMinimum Peak Value (P) g’s

Nominal Duration (D) ms

Functional2011Crash Safety40

113.15 Vibration
The MS14 is designed to meet the requirements of random vibration per conditions (MIL-STD-810C, Method514.2, Procedure 1A) to the levels defined below. Acceleration Power Spectral Density (PSD) for the random
vibration envelope is shown in Figure 3-2. Amplitudes for the functional levels and endurance level requirements
are as shown in Table 3-3.

Table 3-3. Vibration Zone 3 and 4Vibration Zone 3 and 4Functional, 12.6g RMS
Duration = 2 Hours/Axis
Freq. Hzg2/Hz15.0033

800.177

2000.177

2340.111500

0.111535

0.097

1000

0.097

2000

0.024

MS14

Table 4-1. MS14 Available Options
Power Supply
Voltage Input

Source Voltage

Type

DC 16-32VDC

Military Style Connector
DC Voltage Out

3.3 (Passive Only)

Output Voltage (1)

5.0
7.5

RF Connector

Connector

Connector Type

Limitations

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

TNC (Female/Male)

N/APort (1)
5. Product Code Decoder
Pass DCAll Ports Pass DC
DC Blocked

J3, J4, J5 are DC Blocked with 200Ω Load; DC is passed J2
to ANT (J1)

Note: 1. Source Voltage Option:
Any or all RF ports (input or output) can be DC Blocked or can pass the powered DC voltage.

Product Code Decoder

MS14

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D-GPSS-MS14 RH-01-0422
059-FSA-ATC-EEY-TXZ Rev B