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MU 9-XP4/…, MU 9-CXP4/…, MU 9-XGP4/…

450 MHz 2 dB mobile antenna for glass fibre roof
Description
  • Ground plane independent antenna for installation on non-conducting surfaces.
  • Ideal for glass fibre roofs as can be found on some trucks, busses, transport vans and trains.
  • MU 9-XP4/s can be tuned by cutting within 380…410 MHz.
    MU 9-XP4/l can be tuned by cutting within 400…440 MHz.
    MU 9-XP4/h can be tuned by cutting within 430…470 MHz.
  • M6-thread whip-fastening system.
  • Simple mounting exclusively with access from the outside.
  • Models available with oblong or circular mount.
  • Also oblong models with GPS are available.
  • Delivered with permanently attached 4 m RG 58 cable terminated with FME-connector. (Other models on request)
  • ECE R118.02 approved cable.

Specification
Electrical
Model MU 9-XP4/…, MU 9-CXP4/…, MU 9-XGP4/…
Frequency 450 MHz band covered by three models
Antenna Type End-fed ½ λ dipole mobile antenna
Max. Input Power 40 W
Polarisation Vertical
Impedance 50 Ω
Gain (EIA RS-329-1) 2 dB
Mechanical
Compliance ECE R118.02 approved cable
Connection(s) Cable RG 178, length 150 mm
Connector : FME(m)
Materials Whip : Polyethylene-covered spring steel wire
Mount : Black-chromed brass
Weather- and shockproof plastics
Surface treated steel
Cable 4 m cable terminated with FME-connector.
(Other cable lengths on request)
Installation Torque Max. 3 Nm
Colour Black
Historic Brand Amphenol Procom
Height Approx. 410 mm / 16.14 in.
Weight Approx. 0.21 kg / 0.46 lb.
Mounting From outside : 21 mm dia. hole
From inside : 14 mm dia. hole
Mounting For GPS-Models 19 mm dia. hole
Mounting Plate Thickness 0.6 – 5 mm / 0.02 – 0.20 in.
Ordering Codes
Model Product No. FrequencyAdditional Information

MU 9-XP4/s

 130001089 380… 410 MHz Oblong mount with 4 m cable and FME-conn.

MU 9-XP4/l

 130001097 400… 440 MHz Same mount as above

MU 9-XP4/h

 130001085 430… 470 MHz Same mount as above

MU 9-CXP4/s

 130001096 380… 410 MHz Circular mount with 4 m cable and FME-conn.

MU 9-CXP4/l

 130001098 400… 440 MHz Same mount as above

MU 9-CXP4/h

 130001086 430… 470 MHz Same mount as above

MU 9-XGP4/s

 132000190 380… 410 MHz Oblong mount with 4 m and FME-conn., and GPS

MU 9-XGP4/l

 132000189 400… 440 MHz Same mount as above

MU 9-XGP4/h

 132000188 430… 470 MHz Same mount as above
Additional Information
Ordering Designations
TYPEPRODUCT NO.CELLULAR SYSTEMMOUNT VERSION
READY-TUNED MODELS (examples)
MU 9-XP4/380-410 MHz 130002508 TETRA BOS,
Germany		 Oblong mount with 4 m cable and FME-conn.
MU 9-XP4/410-430 MHz Contact for availability Industrial Systems
Germany		 Same mount as above
MU 9-XP0.1/380-410 MHz-MFME Contact for availability TETRA BOS,
Germany		 Oblong mount with 0.1 m cable and FME-male conn.
MU 9-CXP4/380-410 MHz 130001783 TETRA BOS,
Germany		 Circular mount with 4 m cable and FME-conn.
MU 9-CXP4/410-430 MHz Contact for availability Industrial Systems
Germany		 Same mount as above
MU 9-CXP0.1/ 380-410 MHz-MFME 130002191 TETRA BOS,
Germany		 Circular mount with 0.1 m cable and FME-male conn.
MU 9-XGP4/380-410 MHz Contact for availability TETRA BOS,
Germany		 Oblong mount with 4 m cable and FME-conn., and GPS
MU 9-XGP0.1/ 380-410 MHz-MFME 132000191 TETRA BOS,
Germany		 Oblong mount with 0.1 m cable and FME-male conn., and GPS

When ordering a ready-tuned model, the name of the desired cellular system must be added to the antenna model number.

MU 9-XGP4 Mount

Please note that the MU 9-XP4, MU 9-CXP4 and MU 9-XGP4 type “s”-, “l”- and “h” mounts contain matching transformers. Consequently, these special mounts cannot operate with other whip types.

Installation

This antenna is especially designed for installation on non-conducting surfaces as e.g. glass fibre roofs, as can be found on some trucks, busses, transport vans and trains.

The antenna is an end-fed, ½ λ-dipole concept which can be fed in such a way that the antenna does not require a “ground plane” as required by the standard ¼ λ, 5/8 λ or collinear mobile whips.

It is useful to note that this antenna type can be used anywhere where the ground plane is poor or completely missing, as e.g.: side-mounted on a clamp as a pager antenna on a wall or mounted at the very edge of a ground-plane without the loss induced by a tilted radiation pattern.

The antenna must be mounted on a horizontal surface. When cleaning the vehicle in car-washing machines, the whip is easily dismounted using a spanner, size 9 mm. The whip is refitted again by screwing it onto the M6 thread stud on the mount and tightening it lightly with the spanner.

A polyethylene-covered, closely spirally wound flat steel-band material causes the whip always to stand erect while at the same time being very flexible.

1. Installation Dimensions

1A.

1B. FOR GPS-MODELS

2. Installation steps

2A. (From outside)

Do not use sealer on rubber gasket or other places.

2B. FOR GPS-MODELS (From outside)

Do not use sealer on rubber gasket or other places.

2B. ASSEMBLY INSTRUCTIONS (for GPS-models)

  1. Put GPS-FME-connector-cable through the gasket (2).
  2. Put the gasket (3) + GPS-part (1) over the body (B).
  3. Put the body (B) + gasket (3) + GPS-part (1) through the ø19 mm hole.
  4. Put the housing (4) over the body (B) and be sure that the GPS-part (1) fits into the
    square hole in the body (B).
  5. Put the threaded part over the body (5) and tighten max. 3 ±1 Nm!
  6. Mount the antenna whip.
3. Tuning

The antenna should always be tuned using an SWR-indicating device. The cutting diagrams below serve as a guide for this procedure.

EU and UK Declaration of Conformity

Hereby Amphenol Procom declare that the product type MU 9-XGP4 is in compliance with EU Directive 2014/53/EU and
the UK Radio Equipment Regulations 2017 (S.I. 2017 No. 1206).
The full text of the Declaration of Conformity is available at:

https://s3.us-west-2.amazonaws.com/catsy.1080/Declaration-of-Conformity-MU9-XGP4.pdf

PROCOM A/S reserves the right to amend specifications without prior notice
PROCOM A/S • Smedetoften 12 DK 3600 Frederikssund • Denmark
Generated : 2026-06-27 Version 1