| Electrical | |
| Model | DFA 2/70-X/… |
|---|---|
| Frequency | 160 MHz-band freq. to be stated within : 144-175 MHz 450 MHz-band freq. to be stated within : 380-470 MHz |
| Antenna Type | Dual-frequency mobile antenna |
| Max. Input Power | 30 W |
| Polarisation | Vertical |
| Impedance | 50 Ω |
| VSWR | ≤ 1.5.1 @ f.res. |
| Bandwidth | 160 MHz : 8 MHz @ VSWR = 2.0 450 MHz : 15 MHz @ VSWR = 2.0 |
| Gain (EIA RS-329-1) | 0 – 2 dB |
| Mechanical | |
| Materials | Whip : Conical glass fiber Black chromed brass Mount : Black chromed brass weather- and shockproof plastics Stainless steel |
|---|---|
| Installation Torque | 4 ± 1 Nm |
| Colour | Black |
| Historic Brand | Amphenol Procom |
| Antenna Mount Type | Hole Mount |
| Height | Approx. 500 mm / 19.69 in. |
| Weight | X-version : Approx. 160 g XP4-version : Approx. 310 g |
| Mounting | 18 mm dia. hole |
| Model | Product No. | Additional Information |
|---|---|---|
|
DFA 2/70-X/… |
130000688 | X-mount with FME-system |
|
DFA 2/70-XP4/… |
130000684 | XP4-mount with 4 m cable and FME-connector |
The antenna is delivered factory-tuned to two single frequencies, one frequency in each band. These two fre?quencies (stated in MHz) must be specified when ordering as can be seen from the ordering examples below. In case of duplex operation, only the Tx frequency should be stated.
This antenna should be mounted on the car roof to ensure best omnidirectional coverage.Mounting can take place exclusively with access from the outside when drilling an 18 mm dia. hole. Mounting can take place from the inside by drilling a 14 mm dia. hole. When mounting in a 14 mm dia. hole, remove the bottom plastic ring of the packing gasket with a sharp cutter.When cleaning the car in car-washing machines, remove the whip using a spanner, size 9 mm. After wash, refit the whip and tighten it lightly with the spanner.
Do not use sealer on rubber gasket or other places.
Several advantages are gained by using only one antenna. Only one single hole has to be drilled into the car body, only one cable installation has to be run, the car appearance is not destroyed by carrying several whips and also, it may be a particular demand that it should not be too obvious to see that the car is equipped with transceiving equipment.
In case of operating two transceivers on one antenna at the same time, a diplexer, type DIPX 225/330 is necessary to complete the system. (See the coupling diagram below). The tasks of the diplexer are to protect the two receiver inputs from being destroyed by the transmitter in the contrary band, and to ensure a low-loss path between the transceiver and the antenna, which is not loaded by the other branch. For further details please see the separate data sheet on the DIPX 225/330.
The diplexer fully covers both bands and, consequently, tuning to specific frequencies is not required.
