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MPX 70/44-...-TETRA-N

8-Resonator Mini-Duplexer for the TETRA Band

  • The MPX 70/44-...-TETRA-N is a 8-resonator miniaturized duplex filter for duplex radiotelephones. This compact “miniplexer” meets the demand for a modern, space saving, high performance filter type.
  • The MPX 70/44-...-TETRA-N models are primarily intended for equipment, where the TX and RX operate on several channels, i.e. within a certain port bandwidth, but it can also be used where the TX and RX operate on single frequencies with even better performance on insertion loss and attenuation (up to 90 dB).

DESCRIPTION

  • The duplexer is available in a variety of different versions depending on duplex spacing, frequency, bandwidth and attenuation.
    The MPX 70/44-...-TETRA-N is tunable within 380 - 470 MHz range.
    See also “Ordering information”.
  • The miniaturization of the filter has been realized by using special high-Q, temperature compensated helical resonators.
  • The housing is made of extruded aluminium, the chassis of steel, and teflon insulation has been applied in the rigid coaxial cables and in the connectors.
  • MPX 70/44-...-TETRA-N is coated with black vinyl to prevent corrosion.
  • Other models with different frequencies, duplex spacing, bandwidth and attenuation are available on request.

ORDERING DESIGNATION

TYPE LOW HIGH PRODUCT NO.
MPX 70/44-A-TETRA-N 380 - 395 405 - 420 200002280
MPX 70/44-B-TETRA-N 380 - 395 410 - 425 200002281
MPX 70/44-C-TETRA-N 380 - 395 415 - 430 200002282


ORDERING INFORMATION

When ordering, please use the table above to select the appropriate ordering designation for the desired filter type. If duplex TX and RX frequencies are stated when ordering, the duplexers are delivered factory adjusted.

SPECIFICATIONS

ELECTRICAL  
MODEL MPX 70/44-...-TETRA-N
MAX. INPUT POWER 50 W
TX/RX-FREQUENCY See model selection table above
BANDWIDTH 15 MHz
INSERTION LOSS IN PASSBAND ≤ 1.5 dB (typ. 1.0)
ATTENUATION IN STOPBAND ≥ 60 dB
IMPEDANCE Nom. 50 Ω
SWR (All ports) ≤ 1.5
MECHANICAL  
FREQ. STABILITY Approx. 4.5 ppm/° C
CONNECTORS N-female
DIMENSIONS (L x W x H) 145 x 104 x 56 mm / 5.7 x 4.1 x 2.2 in.
WEIGHT Approx. 700 g / 1.5 lb.
ENVIRONMENTAL  
TEMP. RANGE –30° C → +60° C

TYPICAL RESPONSE CURVES @ 10 MHz DUPLEX SPACING

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