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.
MPX 70/44-…-TETRA-N
8-Resonator Mini-Duplexer for the TETRA Band
Description
- 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).
- 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.
Specification
| Electrical | |
| Model | MPX 70/44-…-TETRA-N |
|---|---|
| Frequency | Low : 380 – 395 MHz High : 405 – 430 MHz (depends on model) |
| Max. Input Power | 50 W |
| Pass Band Insertion Loss | ≤ 1.5 dB (typ. 1.0) |
| Impedance | 50 Ω |
| VSWR | < 1.5:1 |
| Bandwidth | 15 MHz |
| Stop Band Attenuation | ≥ 60 dB |
| Environmental | |
| Frequency Stability | Approx. 4.5 ppm / °C |
|---|---|
| Operating temperature range | -30 °C to +60 °C |
| Mechanical | |
| Connection(s) | N(f) (BNC(f), TNC(f), UHF(f) or SMA(f) on request) |
|---|---|
| Historic Brand | Amphenol Procom |
| Dimensions | 145 (excl. conn.) x 104 x 56 mm / 5.7 (excl. conn.) x 4.1 x 2.2 in. |
| Weight | Approx. 0.7 kg / 1.54 lb. |
Ordering Codes
| Model | Product No. | Frequency |
|---|---|---|
|
MPX 70/44-A-TETRA-N(f) |
200002280 | Low: 380 – 395 MHz / High: 405 – 420 MHz |
|
MPX 70/44-B-TETRA-N(f) |
200002281 | Low: 380 – 395 MHz / High: 410 – 425 MHz |
|
MPX 70/44-C-TETRA-N(f) |
200002282 | Low: 380 – 395 MHz / High: 415 – 430 MHz |
Additional Information
Please Note
Special configurations of this filter type may be quoted on request. For instance, the filter can be delivered with other connector types or with flying leads (RG 316 coaxial cable) terminated with connectors or prepared for direct soldering into PCB.
Mounting Details
All dimensions are given in mm [in.]
Typical Response curve @ 10 MHz Duplex spacing
Diagrams
TYPICAL RESPONSE CURVES @ 10 MHz DUPLEX SPACING
PROCOM A/S reserves the right to
amend specifications without prior notice
PROCOM A/S • Smedetoften 12
DK 3600 Frederikssund • Denmark
Generated : 2026-06-26
Version 1