Rohde&Schwarz EK2000 User Guide
Articles
VLF-HF Receiver EK 2000
A “quick-change artist” with every
modulation in its repertoire
With VLF-HF Receiver EK 2000 Rohde & Schwarz is adding an attractive receiver
featuring state-of-the-art technology to its XK 2000 family of shortwave radio
equipment. This receiver is able to handle all relevant types of modulation, includes
an HF modem as an option, and can also serve as a modulator for separate
transmitters. In next to no time the receiver can be changed into a transceiver or
exciter.
Photo 43 353
EK2000 not only handles all types of modulation, it can easily swap roles thanks to a removable power supply.In next to no time it can be
turned into either a 150 W transceiver or
receiver/exciter
proof front panel (IP42 protection
class) taken from XK 2000 allow use
even in the toughest conditions. Of
course, the receiver complies with the
environmental specifications of
MIL-ST-810E.
Proven technology growth
The need for HF receivers equipped
with the reliable modules of the
XK 2000 family [1; 2] and featuring
versatile system interfaces led to the
development of this new equipment.
The sturdy design and water- and dust-
20 News from Rohde & Schwarz Number 163 (1999/III)
Understands every modulation
VLF-HF Receiver EK2000 (FIG) is envisaged not only for
it is also ideal for broadcast reception,
eg in BRASS (broadcast and ship to
classic reception,
shore) marine use and split-site mode.
Remote Control Processor GP2000 [3]
is best suited for controlling the receiver.
Due to the use of DSP technology,
EK 2000 features the outstanding characteristics of the latest generation of
receivers and is able to handle all
types of modulation used in military
and civil communication. For the reception of morse, speech, teletype and
data signals, the receiver can be operated in the modes SSB (USB/LSB),
ISB, AME, CW, FSK, AFSK, F1C and
Articles
FM, and meets MIL-STD-188-141A
thanks to its excellent receive characteristics.
Equipped with the appropriate options
it provides:
·
link 11 mode to MIL-STD-188-2031A or STANAG 5511,
·
link 22 mode to STANAG 5522,
and
·
reception in SLEW mode (singletone link eleven waveform) and
with link Y Mk-II modem.
With its built-in HF Modem GM2100,
the receiver fulfills every conceivable
requirement. The modem option enables EK 2000 to receive data signals
transmitted in single-tone mode (PSK)
in accordance with MIL-STD-188-110A,
STANAG 4481 (without FSK), 4285
and 4529. And the receiver has ready
functionality for future modulation
modes, which can be quickly and
simply installed by software upgrades.
A whole lot of extras
One of the special advantages of
EK2000 is that it can be used as a
modulator for separate transmitters
FSK and PSK modes (STANAG 4285,
in in
in
in in
4529 and MIL-STD-188-110A). All
that is needed is a line to the transmitter and audio signals at the receiver.
EK 2000 integrates a
scan
with freely selectable step size
fast frequency
as well as a channel scan. In both
cases the dwell time, hold time and
RF thresholds can be set individually.
All settings can be performed either
manually on the menu-guided
man-
machine interface, optimized for
reception, or conveniently via the
remote-control interface using Radio
Remote Control Software DS110.
Quick-change artist
The receiver includes its own power
supply unit for 97 to 253 V AC (47 to
440 Hz). Alternatively, it can be operated with DC voltages from 24 to 31 V,
eg from a backup battery.
able power supply makes EK 2000 a
“quick-change artist”. This power supply can be taken out by undoing a few
screws and replaced by a 150 W
power amplifier or an interface board.
This simple operation transforms
EK2000 into either a 150 W Trans-
ceiver XK 2100 or a Receiver/Exciter
The remov-
Unmistakable family likeness
EK 2000 features numerous characteristics for
which the transceivers of the XK 2000 family
are outstanding:
·
17 group-delay-compensated IF filter
bandwidths between 50 Hz and 8 kHz
·
Automatic and manual gain control with
settable control voltage
·
Settable notch filters
·
Passband tuning
·
Syllabic squelch
·
Noise blanker
·
Voice Processing Unit (GN2110), an
option for enhancement of speech quality
that can be equipped with speech encryption
·
High-performance mixer in receiver
input, ensuring brilliant large-signal
characteristics (IP2 typ. +70 dBm and IP3
typ. +35 dBm)
·
Outstanding receiver noise figure
·
High input sensitivity and large-signal
immunity
·
Fast-switching Preselection FK 2010,
easily integrated and digitally tuned and
offering minimum attenuation of 20 dB at
10 % frequency offset, thus allowing
critical operation under simultaneous
conditions; it increases input voltage
immunity to 200 V EMF
·
Motor-tuned Preselection FK2850 for
40 dB attenuation at 10 % frequency
offset
GX 2900 L for controlling a 500 W or
1 kW transceiver of type XK 2500 or
XK 2900.
Robert Träger
Condensed data of VLF-HF Receiver EK 2000
Frequency range/resolution 10 kHz to 30 MHz/1 Hz
Frequency error 2 x 10
Modes (standard) A1A, J3E, H3E, J7B, B8E, F1B,
Modes (optional) B7D, MIL-STD-188-203-1A, STANAG
Sensitivity (w/o preamplifier)
for S/N =10 dB, A1A, BW = 300 Hz typ. 0.4 µV EMF
J3E, J7B, BW = 2.7 kHz typ. 1.1 µV EMF
H3E, 1 kHz, m = 60 %, BW = 6 kHz typ. 3 µV EMF
Signal/noise ratio (H3E)
Operating temperature range –25 °C to +55 °C
Dimensions 19", 3 HU (bench version or
Weight approx. 13 kg (without options)
–8
/°C (TCXO)
–9
/°C (OCXO)
1 x 10
F3E, F7B, F1C, A3E
5511, 5522, 4481 (w/o FSK),
4285, 4529, MIL-STD-188-110A
>
46 dB SINAD for 1 mV EMF
to CCITT (O.41/P53)
rackmount)
Reader service card 163/07
REFERENCES
[1] Helmke, B.; Wachter, G.: HF Transceiver
XK2100 – Digital shortwave for futureproof, long-haul communication. News
from Rohde& Schwarz (1994) No.144,
pp 4 – 7
[2] Träger, R.: HF Transceiver XK2500 and
XK2900 – The new members of HF Transceiver Family XK2000. News from
Rohde& Schwarz (1997) No. 153,
pp 12–13
[3] Kneidel, T. A.: Remote Cotrol Processor
GP 2000 – The wild card in shortwave communication. News from Rohde& Schwarz
(1998) No.157, pp 10– 11
News from Rohde & Schwarz Number 163 (1999/III) 21
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