Rhode & Schwarz VLF-HF Receiver EK 2000 Datasheet Manual

							20News from Rohde & Schwarz Number 163 (1999/III)
VLF-HF Receiver EK 2000
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 ser ve as a modulator for separate
transmitters. In next to no time the receiver can be changed into a transceiver or
exciter.
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-proof front panel (IP 42 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.
Understands  every  modulation
VLF-HF Receiver EK 2000 (FIG) is en-
visaged not only for
      
 classic reception,
it is also ideal for broadcast reception,
eg in BRASS (broadcast and ship toshore) marine use and split-site mode.
Remote Control Processor GP 2000 [3]
is best suited for controlling the receiver.
Due to the use of DSP technology,
EK 2000 features the outstanding char-
acteristics of the latest generation of
receivers and is able to handle all
types of modulation used in military
and civil communication. For the re-
ception of morse, speech, teletype and
data signals, the receiver can be op-
erated in the modes SSB (USB/LSB),
ISB, AME, CW, FSK, AFSK, F1C and
A “quick-change artist” with every
modulation in its repertoire
EK 2000 not only handles all types of modula-
tion, it can easily swap roles thanks to a remov-
able power supply.In next to no time it can be
turned into either a 150 W transceiver or
receiver/exciter
Articles
Photo 43 353 
						

							News from Rohde & Schwarz Number 163 (1999/III)21
REFERENCES
[1] Helmke, B.; Wachter, G.: HF Transceiver
XK 2100 – Digital shortwave for future-
proof, long-haul communication. News
from Rohde & Schwarz (1994) No.144,
pp 4–7
[2] Träger, R.: HF Transceiver XK 2500 and
XK 2900 – The new members of HF Trans-
ceiver Family XK 2000. News from
Rohde & Schwarz (1997) No. 153,
pp 12–13
[3] Kneidel, T. A.: Remote Cotrol Processor
GP 2000 – The wild card in shortwave com-
munication. News from Rohde & Schwarz
(1998) No.157, pp 10–11
Condensed data of VLF-HF Receiver EK 2000
Frequency  range/resolution 10 kHz to 30 MHz/1 Hz
Frequency  error 2 x 10–8/°C (TCXO)
1 x 10–9/°C (OCXO)
Modes  (standard) A1A, J3E, H3E, J7B, B8E, F1B,
F3E, F7B, F1C, A3E
Modes (optional) B7D, MIL-STD-188-203-1A, STANAG
5511, 5522, 4481 (w/o FSK),
4285, 4529,  MIL-STD-188-110A
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)>46 dB SINAD for 1 mV EMF
to CCITT (O.41/P53)
Operating temperature range–25 °C to +55 °C
Dimensions 19, 3 HU (bench version or
rackmount)
Weight approx. 13 kg (without options)
Reader ser vice card 163/07
Articles
Unmistakable family likenessEK 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 (GN 2110), an
option for enhancement of speech quality
that can be equipped with speech en-
cryption
·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 FK 2850 for
40 dB attenuation at 10 % frequency
offset
FM, and meets MIL-STD-188-141A
thanks to its excellent receive charac-
teristics.
Equipped with the appropriate options
it provides:
·link 11 mode to MIL-STD-188-203-
1A or STANAG 5511,
·link 22 mode to STANAG 5522,
and
·reception in SLEW mode (single-
tone link eleven waveform) and
with link Y Mk-II modem.
With its built-in HF Modem GM 2100,
the receiver fulfills every conceivable
requirement. The modem option en-
ables 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
EK 2000 is that it can be used as a
modulator for separate transmitters
 in  in in  in
 in
FSK and PSK modes (STANAG 4285,4529 and MIL-STD-188-110A). All
that is needed is a line to the transmit-
ter and audio signals at the receiver.
EK 2000 integrates a
      
 fast frequency
scan
      
 with freely selectable step size
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 DS 110.
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 oper-
ated with DC voltages from 24 to 31 V,
eg from a backup battery.
      
 The remov-
able power supply makes EK 2000 a
“quick-change artist”. This power sup-
ply 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
EK 2000 into either a 150 W Trans-
ceiver XK 2100 or a Receiver/ExciterGX 2900 L for controlling a 500 W or
1 kW transceiver of type XK 2500 or
XK 2900.
Robert Träger