H.F.
RECEIVING SYSTEM (1.6 TO 30 MHz.)
Model
No. H 621
| |
|
1. H.F. OMNI SYSTEM
|
| The
system consists of one vertically polarized H.F. Omni
Directional Antenna covering a frequency range from 1.6
to 30 MHz, coupled with one H.F. Antenna Multicoupler,
Coupling 8 communication receivers simultaneously, each
tuned to their respective signal required for them. |
| (A) |
ANTENNA
Cat No. : Z1/5985-00197 |
|
1.
|
Frequency
Coverage |
:
|
1.6
to 30 MHz. |
|
2.
|
Input
Impedane |
:
|
50/6075
Ohms (as required) |
|
3.
|
Polarisation
|
:
|
Vertical |
|
(B)
|
MUKLTICOUPLER:
Cat No.310 B/5985-00413
|
|
7.
|
Input
Impedane |
:
|
50
Ohms |
|
8.
|
Insertion
Gain |
:
|
up
to 3 db |
|
9.
|
Output
Impedance |
:
|
50
Ohms |
|
10.
|
Input
/ Output V.S.W.R. |
:
|
1:1.5
or better |
|
11.
|
No.of
output channels |
:
|
8 |
| The
design of the multicoupler is such that it would effectively
cut off the strong broad casting stations below 1.6 MHz.
By 10 db, down and also designed with plug in modules
so that the replacement of modules is quick and with minimum
interruption. |
|
2.
HF. DIRECTIONAL SYSTEM:
Instead of the antenna Omni Directional, the multicoupoer will be
coupled to a Bi-directional Broad Band Dipoles 1.6 to 30 MHz. Or
H.F. Log Periodic Antenna which will enable the directional reception
with strong signal strength.
ADVANTAGES OF SYSTEMS :
(1) The
advantages of installing our H.F. System will be to avoid 2 aerials
and 4 masts for separate day and night frequency communication and
also avoid the change over switches.
(2)
This will enable 8 receivers to have their individual communications
on their respective frequencies with a single antenna.
(3)
In view of the negligible space requirement, the antenna could be
installed on the roof of any building in cities itself, eliminating
large space requirement.
(4) 600
Ohms feeder lines or cables can be dispensed along with their support
masts, in view of use of coaxial cable.
(5) Frequency
hopping is a great advantage for monitoring purpose.
Antennae
:: Enquire
for Pneumatic Masts
|
