|
Polar Electronic Industries Pty Ltd offers a range of receiver multicouplers covering various bands from 2 MHz to 960 MHz. The multicouplers specified cover the whole of their frequency bands given.
A receiver multicoupler (splitting amplifier) is used to combine multiple receivers on to a common antenna.
The multicoupler consists of an amplifier and a hybrid power divider, - the latter splits the received signals into the desired number of outputs with isolation between each.
The amplifier provides sufficient amplification of the received signals to overcome the losses in the hybrid dividers, yet not causing intermodulation problems nor overload of the receiver inputs. | | | |
The receiver multicouplers have heavy duty aluminum cases and panels and are designed for rack mounting.
Connections are to the rear panel, with an "N" type female input.
A non shorting polarized connector is provided for the 13.8 DC power input, the shielded mating connector is supplied for your convenience.
The DC input line is filtered to ensure no interference signal is introduced into the receiver output ports by the DC input line. It is recommended that the unused output ports should be terminated with 50 ohm loads, and where a receiver multicoupler is ordered with spare outputs it will be supplied with these having Polar terminating resistors.
Finish - gray enamel paint. | | | |
We can supply to order other frequency bands if required, and can offer a wide band splitting amplifier covering 25 - 520 MHz, to special order.
We do not include receiver preselectors as part of the receiver multicoupler, these units are treated separately.
RECEIVER MULTICOUPLER SELECTION GUIDE
_______________________________________
The parameters in selecting a receiver multicoupler with an amplifier suitable for your application are:
(a) Operating Frequency Range:
Select your frequency band. The gain of the amplifier in the receiver multicoupler's specification applies over the bandwidth of the frequency range given.
(b) Number of Outputs for Receivers:
Select the multicoupler model to suit the number of receivers used and allow for any future expansion.
(c) Output Intermodulation Intercept Point:
This parameter is an indication of the ability of an amplifier to amplify very strong signals without adding large intermodulation products to the received signal. This specification is of prime importance when more than one transmitter is used in the near vicinity of the receiving antenna.
(d) 1 dB Compression Input Level:
Related to the intermodulation intercept point, this parameter along with the noise figure, determines the amplifier's dynamic range.
(e) Noise Figure:
This parameter determines the smallest signal level which may be received in low noise sites, where no blocking, distortion or locally generated noise conditions exist. Noise figure is most important in space communications, and other point-to-point communications, where the amplifier is used in conjunction with highly selective filters or directional antennas to exclude other signals.
(f) Gain:
Generally, levels of overall system gain from 0 to 3 dB are acceptable. Excessive gain will usually cause overload to the receiver, insufficient gain will add to the system noise figure. Note that the gain figures specified refer to the multicoupler system only and do not take account of signal losses preceding the receiver multicoupler. | | |
|
 |
| MODEL NO |
SA8C |
| FREQUENCY |
820 - 960 MHz |
| IMPEDANCE |
50 ohms (input/output) |
| VSWR |
1.5:1 max |
| ISOLATION |
20dB (input) |
| ISOLATION |
20dB (output) |
| TEMP. RANGE |
-10°C to +60°C |
| GAIN |
0 - 3dB (overall system gain) |
| SYSTEM NOISE FIGURE |
3dB |
| INPUT LEVEL |
0dBm (-1dB input compression) |
| DC CURRENT |
10-15 VDC, 100-250 mA |
| TERMINATION - INPUT |
'N' FEMALE |
| TERMINATION - OUTPUT |
'N' FEMALE |
| RACK UNITS |
4 x 19 RU |
| WEIGHT |
4.6 kg |
|
|
|
|
