PRO-DDPF E-GSM-R
Dual Duplex Protection Filter for E-GSM-R
Description
- Low insertion loss.
- High level of rejection close to the passband.
- Good rejection of out of band spurious signals.
- Reduces interference from public mobile networks.
- Protect the E-GSM-R Cab radios from blocking problems.
- European International Union of Railways (UIC) has reported a high number of E-GSM-R network problems caused by interference from strong public mobile networks signals (E-GSM-R, UMTS and LTE). The reported cases show that the interference from the public mobile network transmitters effects E-GSM-R equipment installed in railway trains e.g. receiver desensitization, receiver blocking and receiver overload.
- The number of interferences is expected to increase in future, due to the planned deployment of E-GSM-R in Europe and the general growth of public mobile networks.
- Amphenol Procom has developed a dual duplex protection filter for the E-GSM-R band (PRO-DDPF E-GSM-R) that attenuates the interference from public mobile networks and reduces the blocking problems to non-critical levels.
- The Dual Duplex Proctection Filter is devolped using dielectric resonator technology in order to achieve a low insertion loss and a high level of rejection close to the passband.
Specification
| Electrical | |
| Rejection | 0 – 872.0 MHz : ≥ 40 dB 882.0 – 917.0 MHz : ≥ 40 dB 926.0 – 930.0 MHz : ≥ 40 dB 930.0 – 2700 MHz : ≥ 50 dB |
|---|---|
| Model | PRO-DDPF E-GSM-R |
| Frequency | Uplink : 873 – 880 MHz Downlink : 918 – 925 MHz |
| Max. Input Power | 50 W |
| Pass Band Insertion Loss | 0.8 dB (Typ.) |
| Impedance | 50 Ω |
| Passive Intermodulation | < -150 dBc (2 x 43 dBm) |
| Environmental | |
| Frequency Stability | Approx. 2 ppm / °C |
|---|---|
| MTBF | > 1.000.000 hours |
| Operating temperature range | -25 °C to +70 °C |
| Temp. Test | EN 50 155, 4.1.2, T3 |
| Shock and Vibration | EN 50 155, 4.1.3 |
| Humidity | EN 50 155, 4.1.4 |
| Dry Heat | EN 50 155, 12.2.4 |
| Ingress Protection | IP54 |
| Damp Heat Cyclic | EN 50 155, 12.2.5 |
| Storage and Transportation | ETSI 300-019-2-1 |
| Mechanical | |
| Connection(s) | N(f) |
|---|---|
| Historic Brand | Amphenol Procom |
| Dimensions | 350 x 350 x 115 mm / 13.78 x 13.78 x 4.53 in. (incl. adjusting screw) |
| Altitude | EN 50 125-1, 4.2 dass AX |
Ordering Codes
| Model | Product No. |
|---|---|
| Dual Duplex Protection Filter for E-GSM-R | PRO-DDPF E-GSM-R |
Diagrams
ELECTRICAL BLOCK DIAGRAM
MOUNTING DETAILS
TYPICAL RESPONSE CURVES
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