PDF Rohde&Schwarz EK895 HF Reciever Datasheet

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User Manual: PDF T E X T F I L E S

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Page Count: 12

Version

04.00

June

2003

For all shortwave applications from 10 kHz to 30 MHz

◆Compact DSP-based receivers for the

following applications:

– Radiomonitoring and radio

detection

– Radiocommunications

– Search operation, DF systems

– Frontend for HF intelligence tasks

◆Digital signal processing (DSP) for

convenient and versatile operation

◆Two models:

– Half-rack receiver R&S EK895

– Search receiver R&S EK896

◆Realtime remote control or

master-slave mode

◆Tried and tested system concept

◆Excellent price/performance ratio

◆Extremely reliable operation under

harsh environmental and EMC

conditions

Digital VLF-HF Receivers R&S® EK895/R&S® EK896

2 Digital VLF-HF Receivers R&S® EK895/R&S® EK896

Digital VLF-HF Receivers R&S® EK895/R&S® EK896

VLF-HF Receiver R&S EK895

with control panel

Special features

◆Excellent large-signal behaviour, very

good intercept points

◆High resolution of tuning frequency

down to 1 Hz

◆Fast and low-noise synthesizer

◆Demodulators for AM, CW, LSB, USB,

ISB, FM, FSK, AFSK and FAX included

in basic configuration

◆13 bandwidths from 150 Hz to 8 kHz

(quasi-continuous on request)

◆RF preamplifier, switchable (noise

figure 8kT0)

◆Double notch filter

◆Noise blanker

◆DATA LINK reception (option)

◆Passband tuning

◆Syllabic squelch

◆Special RTTY (FSK/AFSK) mark and

space filters, matched to the selected

shift

◆Digital data output

◆Maximum input voltage protection up

to 100 V EMF

◆Control interface fully complying with

international standards

◆Low power consumption <25 VA

(basic model R&S EK895), therefore

little self-heating

◆Powerful microprocessor for bus inter-

facing, menus and user programs

◆Dual receiver as 19“ desktop or rack

models

◆Free slots for retrofitting of options

◆Integrated self-test down to module

level with plain-text result display

◆Available with operator front panel or

remote-control-only front panel

◆Highly compact; width 1/

219"

(R&S EK895) or 19" (R&S EK896)

Operational features

◆Easy to operate via terminal,

computer or front panel

◆High rejection of strong interfering

signals

◆1000 programmable channel memory

locations

◆Scan mode for programmable

frequency ranges and any desired

channel sequences

◆Remote control of all settings – over

any distance when using modems

◆Ideal handoff receivers in stationary,

mobile and remote receiving systems

◆High availability owing to long MTBF

and short MTTR

◆Easy to adapt to special requirements

by means of optional plug-in modules

and standardized interfaces

Digital VLF-HF Receivers R&S® EK895/R&S® EK896 3

Overview

General characteristics of the

R&S EK895

With the R&S EK890 family, Rohde&

Schwarz is presenting a powerful genera-

tion of VLF-HF receivers which are top-

end products benefiting from many years

of experience in this field. All members of

this family are based on the R&S EK890

basic model. Due to the advantages of

digital signal processing, embedded in

the improved receiver versions R&S

EK895/R&SEK 896 a number of addi-

tional features and operational conve-

nience have been added. Straightfor-

ward, menu-guided selection and pro-

gramming of the receiving settings

ensure excellent processing and handling

of the received signal content. The com-

pact design is due to the use of large-

scale-integration SMDs. Featuring full

system compatibility, the receivers pro-

vide the basis for extremely economical

customer-specific solutions.

With its excellent RF characteristics and

clearcut, full remote-control capability via

standardized data interfaces, the R&S

EK890 family is suitable for all civil,

administrative and military shortwave

applications. These receivers are an ideal

choice for receiving systems that have to

fulfill extremely high reliability require-

ments, in particular under harsh environ-

mental and EMC conditions.

Operation is possible via an ASCII termi-

nal, a computer (PC) or via the front panel.

Using line drivers, a master receiver can

control up to 99 remote receivers in mas-

ter-slave operation. On the R&S EK895/

R&S EK896, two wired and bus-integrated

slots for plug-in modules are provided for

extensions, e.g. BCD interface or input fil-

ters.

Uses

The comprehensive sequence control can

be used for all demanding shortwave

reception tasks. Due to flexible program-

ming of the processor, the following oper-

ating modes are possible:

◆Manual operation

◆Remote control or master-slave

operation

◆Channel scanning, sequential and

programmable

◆Frequency scan

◆Channel reception

◆Password-protected channel

reception

Two independent Receivers R&S EK895 with remote-control panel in a 19“ rackmount adapter

The R&S EK890 family thus fulfills the

requirements for versatile use in voice

receiving and any kind of data communi-

cation system as well as for all radio-

monitoring, radio detection and radio

intelligence (COMINT) applications. For

application in DF systems, an R&S EK895

is used as the master (controlling synthe-

sizer), its LOs being brought out for exter-

nal amplification, distribution and phase-

locked application to all other receivers.

The built-in memory has capacity for non-

volatile storage of 1000 complete channel

settings so that channel management

and control by an external computer are

not required but are nevertheless addi-

tionally possible. Due to their excellent

characteristics regarding dynamic range,

low synthesizer noise and gain control

range, the receivers are ideal high-perfor-

mance frontends for subsequent signal

processing.

4 Digital VLF-HF Receivers R&S® EK895/R&S® EK896

Search Receiver R&S EK896

The R&S EK896 has especially been

designed for complex tasks of radio

detection and search reception, its oper-

ating principle and configuration per-

fectly matching the relevant require-

ments. Basically it is fitted with panel

controls and LCD displays for local and

remote-control operation.

High-speed and reliable radiomonitoring

is supported by temporary storage of a

complete receiver setup and its transfer

to or readout from the connected slave.

The R&S EK896 is the optimal operator’s

position in modern radiomonitoring sys-

tems. In the usual master-slave mode, a

master receiver can control up to 99 slave

receivers via additional line drivers to

handle simultaneous radiomonitoring or

specific radio detection tasks. Due to its

outstanding characteristics, the R&S

EK896 is ideal for use as a standalone

receiver. All R&S EK895 options can be

fitted.

Design

RF unit

The antenna signal is routed via a low-

pass filter, which is provided for rejecting

image frequencies and suppressing oscil-

lator reradiation, and applied to the input

mixer where it is converted to the first IF

of 41.44 MHz by means of an oscillator

variable in 1 Hz steps. The crystal filter

that follows determines the maximum

receiving bandwidth of 10 kHz and rejects

the second image frequency. A fixed fre-

quency of 40 MHz is used for conversion

to the second IF of 1.44 MHz.

The high-performance mixer at the

receiver input ensures excellent large-

signal behaviour. The intercept points are

typically +70 dBm (IP2) and +35 dBm

(IP3); the crossmodulation transfer is 10%

for an interfering signal of +21 dBm. In

most cases, additional filters such as sub-

octave filters are therefore not required.

IF/AF processor (DSP)

The second IF is converted to the third IF

of 25 kHz using a 5.66 MHz fixed fre-

quency. After digitization of the third IF in

a 16-bit A/D converter, the processor

assumes all signal generation and pro-

cessing tasks (DSP) including the follow-

ing:

◆Automatic, remote or manual control

(AGC, DGC, MGC)

◆Measurement of received levels

◆Filtering with 13 fixed or quasi-contin-

uously adjustable bandwidths

◆Demodulation, passband tuning,

double notch filter

◆Noise blanker, syllabic squelch

◆Generation of BFO frequency as

analog IF from 0 to 40 kHz, digital IF

as serial data and I/Q data stream

Synthesizer

The synthesizer supplies all the conver-

sion frequencies required for the RF and

the IF demodulator units. Due to direct

digital frequency synthesis, the first con-

version oscillator can be varied in 1 Hz

steps. The settling time of the oscillator is

5 ms for any frequency variation. Two

phase-locked loops (PLLs) produce the

40 MHz and 5.66 MHz fixed frequencies.

The operation of the total of four PLLs in

the synthesizer is continuously moni-

tored.

In the basic version, all the frequencies

are derived from a temperature-compen-

sated crystal oscillator. Higher accuracy

requirements can be fulfilled by including

a heated crystal oscillator (optional

OCXO) or using an external frequency

standard (1 MHz, 5 MHz or 10 MHz).

Search Receiver R&S EK896 with front panel for local/remote control

Digital VLF-HF Receivers R&S® EK895/R&S® EK896 5

Antenna

41.45 MHz to 71.44 MHz

5.66 MHz

External

frequency

standard

40 MHz EMC

filter

Headphones Option 1 Option 2

AC supply

Output

RS-232-C/

RS-485

interface

Processor

Control unit

RS-232-C/RS-485

Power

supply

TTY

AF 1

AF 2

I/Q

RF unit

Synthesizer

IF = 41.44 MHz

TCXO

OCXO (option)

A

DDSP

D

A

1

4

A

D

Option

IF

converter

455 kHz

IF/AF processor

IF = 25 kHz

IF = 1.44 MHz

IF 0 to 40 kHz

or

IF 455 kHz

Digital IF (data,

clock, frame)

Control functions

Processor and software

The 16-bit microprocessor using power-

saving CMOS technology is what makes

the high-performance, compact, reliable

and user-friendly concept of the R&S

EK895 possible. The microprocessor is

not only responsible for setting and man-

aging the module functions, it also com-

municates with the outside world via the

panel controls and the data interface,

executes the internal programs and

ensures the high operational reliability

through various routines:

◆Nonvolatile storage of all settings

◆Continuous testing of CPU, RAM and

PROM functions

◆Continuous monitoring (CM) of

synthesizer

◆BIT (built-in test) for module testing

The simple and logical ASCII command

syntax for controlling the receiver via the

serial interface includes control com-

mands for the following:

Basic settings

◆Frequency

◆BFO

◆Bandwidth

◆Demodulation modes

◆Gain control mode

◆Digital threshold

◆Passband tuning

Search operations

◆Frequency scanning

◆Channel scanning

◆Hold time

◆Dwell time

◆Stop criterion

Test operations

◆Read CM status

◆BIT start

◆BIT readout

System operations

Readout of

◆Software version

◆Options

◆Error messages

◆Signal level

◆Deviation

Channel operations

◆Channel manipulations

◆Store channel

◆Erase channel

◆Select channel

◆Readout channel

Special operations

◆Master-slave operation

◆Complete erasure of channel memory

In addition, the following functions can

be selected on the front panel:

◆Display of interface configuration

◆Fast channel storage

◆Channel buffer storage

◆Default settings on/off

◆Password for channel service

◆Local/remote mode

◆Knob increments

Block diagram of the Digital VLF-HF Receivers R&S EK895/R&S EK896

6 Digital VLF-HF Receivers R&S® EK895/R&S® EK896

Rear view of the

R&S EK895

Various configurations

Receivers with control panel

In the standard version, the R&S EK895

receiver is available with an operator

front panel, which can also be retrofitted.

This front panel also permits manual con-

trol and display of all functions while full

remote-control capability is maintained.

This version is particularly suitable for use

as a master receiver in receiving systems

or as a standalone unit (standard with

R&S EK896).

The operator interface allows for a combi-

nation of hardkey and softkey entries.

Parameters that are frequently handled,

i.e. receive frequency, channel, BFO fre-

quency and passband tuning (PBT), can

be entered directly via a separate keypad.

All current receiver settings are continu-

ously displayed in large high-contrast

characters on a backlit LCD. An additional

bargraph indicator allows display of

either the receive level (0 to 120 dBµV, in

5 dB steps), the DGC or MGC settings or

the frequency offset (as a tuning aid and

deviation indication).

Receivers with remote-control panel

Optionally, the receivers are remote-

controlled by ASCII command sequences

via a multistandard interface (RS-232-C,

RS-485, RS-422/423, 2-/4-wire). In the

simplest case, a terminal can be used as

the control unit. For more convenience, a

computer can be used to handle complex

tasks and to create special user inter-

faces. A demo program for generating a

virtual front panel is available if desired.

The features newly incorporated into the

R&S EK895/R&SEK 896, such as pream-

plifier (PREAMP), noise blanker (NB),

squelch (SQ), notch filter (NOTCH) and

passband tuning (PBT), are selected in

submenus using softkeys. If one of these

features is active, a bargraph appears on

the display above the relevant inscription

(PREAMP, NB, SQ, NOTCH, PBT).

Remote Control Unit R&S GB899

(model 03)

This option is an R&S EK895 reduced to

control functions plus a Control Panel

R&S GB890. It is used for realtime remote

control of handoff receiving equipment,

over long distances preferably via addi-

tional modems.

IF bandwidth configuration

The R&S EK895/R&S EK896 features 13

bandwidths from 150 Hz to 8 kHz. Quasi-

continuous tuning in 128 steps is avail-

able as an option.

Input Filter Unit R&S FK890H1

(option)

The input filter module comprises a low-

pass filter, a bandpass filter and eight

suboctave filters which are automatically

selected with the receive frequency.

BCD Interface R&S GC890 (option)

A plug-in BCD interface is available for

controlling frequency-dependent add-on

units with parallel interfaces, e.g. a selec-

tive antenna.

TTY Line Current Source R&S GH890

(option)

For the operation of older teletype units

that require line current (single/double

current), a TTY line current source requir-

ing no extra slot can be accommodated.

IF Converter R&S UX895 (option)

The IF Converter R&S UX895 can be sup-

plied as a submodule for incorporation

into the IF/AF processor. Instead of the

analog IF output signal of 0 to 40 kHz, it

linearly converts the set receive parame-

ters to the IF of 455 kHz.

Digital Selection R&S FK896D

(option for R&S EK896 only)

This option considerably improves the

input selectivity of the receiver. Two ver-

sions are available for 20 dB or 40 dB

stopband attenuation. The automatically

tracking selection circuit includes the fol-

lowing functions:

◆7-circuit lowpass (0 to 30 MHz)

◆5-circuit lowpass (0 to 1.5 MHz) for

rejection of strong shortwave interfer-

ing signals

◆Tracking single-circuit filter (1.5 MHz

to 30 MHz) with a stopband attenua-

tion of >20 dB (40 dB) at 10% spacing

from the center frequency

◆Switch on/off by remote control

◆

Input voltage protection of

≥

200 V EMF

The Digital Selection R&S FK896D is rec-

ommended for use in environments with

strong RF interference (collocation prob-

lems). It improves input selection by auto-

matically tracking the receive frequency

and, at the same time, considerably

increases input-voltage protection

(overload protection).

Digital VLF-HF Receivers R&S® EK895/R&S® EK896 7

Broadband IF Output R&S GM893

(option)

The optional broadband output (plug-in

module) supplies a 1 MHz output signal at

the first IF of 41.44 MHz (relative to a

receive frequency of ±500 kHz). To pre-

vent impairment of the receiver sensitiv-

ity of the main channel (message chan-

nel), the path to the broadband channel is

decoupled by approx. 10 dB. For broad-

band spectrum analysis, a spectrum

display can be connected to this broad-

band output.

Digital data output (option)

For further digital signal processing of the

received signal, a separate digital IF inter-

face (connector X 69 at rear) is available,

delivering the digital DATA, CLOCK

FRAME outputs (0 to 40 kHz, sampling

rate 100 ksps).

DATA LINK option

If DATA LINK operation (MIL-STD-188-

203-1A) is required, special receiver ver-

sions are available.

1.44 MHz IF output, unregulated

(option)

For connecting and operating an external

IF spectrum display, e.g. the Digital

Spectrum Display R&S EP090, an

unregulated IF output at 1.44 MHz is

available. This option uses the HF unit

(model 03) and has to be ordered along

with the basic receiver.

Setting possibilities of R&S EK895 down to second menu level

Operating concept

The R&S EK890 family has a suitable oper-

ating mode for every application (see also

page 8). The remote-control interface is

configured to the RS-485 standard and is

bus-compatible for system operation.

Users who want to control their radiomon-

itoring system from the receiver front

panel rather than from a computer can use

the receivers of the R&S EK890 family as a

master receiver or install the Remote

Control Unit R&S GB899.

The softkey-menu operator interface pro-

vides the ergonomical advantage of clean

front panel layout as well as access to a

large number of setting parameters. When

you insert extension modules, they are

automatically detected and incorporated

in the software BIT and the menu system.

The clearcut operating concept of the R&S

EK890 family has five menu levels which

allow 50 logically structured operating rou-

tines to be called up by softkeys. In spite of

the multitude of functions, operation is

higly convenient, e.g. each type of modula-

tion is assigned a default setting with all

relevant parameters, which can also be

individually programmed.

The table to the left shows all possible set-

tings down to the second menu level.

For fast access to the setting parameters,

the R&S EK896 has 12 additional hard-

keys, e.g. for standard types of modula-

tion, bandwidth variation, etc.

Main menu: MOD GAIN BW SCA MORE

↓Second menu level

MOD Demodulation modes

MORE: for further modes

AM CW LSB USB MORE

GAIN Control modes

Auto, manual, auto+manual, auto+digital

MORE: fast or slow control

AGC MGC A+M A+D MORE

BW Bandwidth BW ↓ BW ↑

SCA Scan mode

Frequency sweep, channel sweep (any sequence),

channel sweep (incremental), stop or continue

sweep, program sweep

FRQ CHP CHS S/C PRO

MORE: M/S SYS SPEC CHM MEM

↓

M/S Master-slave operation

Address slave (indicate slave address, e.g. 62), read

out or vary slave settings

ADR62 GET PUT

SYS System status

Read out firmware version, built-in options, error

messages; start self-test; MORE: total reset

VERS OPT CM BIT MORE

SPEC Special functions

Rotary knob: step size on/off;

level setting for threshold-controlled external

switching signal; show serial interface setting;

switch to remote control; default settings on/off

KNOB LEV SER REM DEF

CHM Channel memory parameters

Channel memory indication and channel-specific

parameter variation without interrupting reception

MOD GAIN BW THLD

MEM Channel memory operations

Clear all memory, clear certain memory,

store to certain memory, use next free memory

CLA CLCH STCH STO

8 Digital VLF-HF Receivers R&S® EK895/R&S® EK896

Control concepts of the Digital VLF-HF Receivers R&S EK895/R&S EK896

RS-485 bus

Remote control

R&S EK895 with control

panel as a standalone unit

or as a master receiver in

systems

Local control

Search Receiver R&S EK896

Slave receivers, max. 99 addressable

R

&S EK895 with front

p

anel for remote control

… via PC or ASCII

terminal

Master-slave operation

RS-485 bus

…

via the Remote Control

Unit R&S GB899,

model 03

Digital VLF-HF Receivers R&S® EK895/R&S® EK896 9

Specifications

Frequency range 10 kHz to 30 MHz

Resolution 1 Hz

Frequency drift

Frequency standard

Oven-controlled frequency standard

–10 to +45°C aging/year

5 x 10–7 1 x 10–6

1 x 10–7 1 x 10–7

External frequency standard 1/5/10 MHz, 0.2 V to 1 V rms

Antenna input BNC connector, 50 Ω

VSWR

<

1.5 typ. with preamp on for f

>

250 kHz

<3

typ. w/o preamp for f

>

5MHz

otherwise <4

typ.

Max. input voltage (≤30 MHz) 100 V EMF

Oscillator reradiation into 50 Ω

termination ≤10 µV

Demodulation modes CW/MCW (A1A, A1B, A2A, A2B)

FAX1 (F1C)

AM/AME (A3E, H2A, H2B, H2E) USB/

LSB (R2A, R3E, J2A, J3E) ISB (B8E)

FSK/AFSK (F1A, F1B), F6 (F7B)

FAX2 (F3C), FM (F3E)

DATA LINK acc. to

MIL-STD-188-203-1A

(on request)

IF bandwidth

(standard values)

3 dB 60 dB

±75 Hz ±150 Hz

±150 Hz ±225 Hz

±300 Hz ±430 Hz

±500 Hz ±770 Hz

±750 Hz ±990 Hz

±1050 Hz ±1600 Hz

±1200 Hz ±1760 Hz

±1350 Hz ±1900 Hz

±1550 Hz ±2100 Hz

±2000 Hz ±3400 Hz

±2400 Hz ±3700 Hz

±3000 Hz ±4200 Hz

±4000 Hz ±5200 Hz

Quasi-continuous bandwidth

(option for R&S EK895) 128 steps, 100 Hz to 9 kHz

Sensitivity

For S/N=10 dB, f=0.1 MHz to 30 MHz

A1A (CW)

J3E (SSB), J7B

H3E (AME), 1 kHz, m=60%

0.4 µV EMF (−121 dBm), BW=300 Hz

1.0 µV EMF (−113 dBm), BW=2.7 kHz

2.7 µV EMF (−104 dBm), BW=6 kHz

With preamplifier, f=0.2 MHz to

30 MHz

A1A (CW)

J3E (SSB), J7B

H3E (AME), 1 kHz, m=60%

0.2 µV EMF (−127 dBm), BW=300 Hz

0.4 µV EMF (−121 dBm), BW=2.7 kHz

1.0 µV EMF (−113 dBm), BW=6 kHz

Immunity to interference,

non-linarities

Intermodulation (1.5 MHz to 30 MHz;

∆f ≥30 kHz; interfering signal 0 dBm)

IP2

IP3

>60 dBm (70 dBm typ.)

>30 dBm (35 dBm typ.)

Crossmodulation (0.1 MHz to 30 MHz,

interfering signal 5 V EMF (+21 dBm);

∆f ≥30 kHz; m=0.3; f=1 kHz; signal

level 10 mV EMF (−33 dBm)) ≤10% modulation transfer

Blocking (0.1 MHz to 30 MHz; interfer-

ing signal 6.3 V EMF (+23 dBm);

∆f≥30 kHz; signal level 1 mV EMF

(−53 dBm); m=0.3; f=1 kHz) ≤1 dB signal attenuation

Desensitization (interfering signal

300 mV EMF; ∆f ≥30 kHz; signal level

30 µV EMF; bandwidth 3.1 kHz) ≥20 dB SINAD

Inherent spurious signals (f >100 kHz) <−113 dBm (nominal −124 dBm)

Image frequency rejection >90 dB

IF rejection >90 dB

Weighted S/N ratio for 1 mV EMF >46 dB SINAD

Gain control automatic (AGC), manual (MGC) or

remote (DGC)

AGC error ≤3 dB typ. (1 µV to 1 V EMF)

Time response constants

Attack time

Decay time

<15 ms

25/150/500 ms, 1 s, 3 s

DGC range 0 to 120 dBµV EMF in 1 dB steps

BFO −5.00 kHz to +5.00 kHz

Resolution 10 Hz

AFSK/FSK demodulator transfer rate (50 baud to 600 baud)

and deviation range (±42.5 Hz to

±425 Hz) adjustable; V.28 interface

and audible tone circuit

Diplex telegraphy demodulator (F7B) 2 x V.28 interface

Channel memory for 1000 channels, nonvolatile, stor-

age of complete receiver setup for

each channel

Data interface RS-232-C, RS-485 (bus-compatible)

Transfer rate 50 baud to 38400 baud

Outputs

AF output 1, AF (I)

Settling range

0.3 kHz to 3.4 kHz; floating;

Zout =600 Ω

−10 dBm to +10 dBm

AF (Q)

FAX1 (F1C)

FAX2 (F3C)

FM (F3E)

480 mV rms, Zout ≈ 100 Ω

1.9 kHz ± 150 Hz in VLF range

(f<500 kHz) 1.9 kHz ±400 Hz in HF

range (f≥500 kHz)

1.9 kHz modulated

NBFM (3 dB bandwidth:

±

4 kHz)

AF output 2 (LSB in ISB mode)

Settling range

0.3 kHz to 3.4 kHz, floating,

Zout =600 Ω

−10 dBm to +10 dBm

Monitoring output 500 mV, Zout =332 Ω

FM video output 1 V/kHz, Zout =1 kΩ

IF (1.44 MHz) output (unregulated)

BW (–3 dB): ≥10 kHz;

gain: (18 ±2) dB, 50 Ω

IF output (analog) 0 to 40 kHz in 100 Hz steps,

0 dBm into 600 Ω or 455 kHz,

0 dBm into 50 Ω (optional)

IF output (digital) serial data (clock, data, frame),

100 ksps

I/Q output (digital) baseband signal, multiplexed,

5 V CMOS

10 Digital VLF-HF Receivers R&S® EK895/R&S® EK896

Options

Control Panel R&S GB890

(model 03)

with controls and indicators for com-

plete receiver setup; connector for

loudspeaker or headphones

(max. 1 W into 8 Ω )

Remote Control Unit R&S GB899

(model 03, on request)

Control Panel R&S GB890 plus R&S

EK895 reduced to control functions,

using RS-232-C with a transfer rate of

50 baud to 19200 baud; modem oper-

ation is recommended for distances

beyond about 100 m

Input Filter Unit R&S FK890H1 lowpass filter 0 to 0.5 MHz

bandpass filter 0.5 MHz to 1.5 MHz

8 suboctave filters 1.5 MHz to 30 MHz

BCD Interface R&S GC890 frequency information, 22 bit parallel

(CMOS, 5 V)

TTY Line Current Source R&S GH890 single current: 40 mA/60 V

double current: ±20 mA/±30 V

IF Converter R&S UX895

(on request)

455 kHz, 0 dBm into 50 Ω,

BNC female

Digital Selection R&S FK896D

(R&S EK896 only)

Frequency range 0 to 30 MHz, at f <1.5 MHz as LPF

Stopband attenuation ≥20 dB (>40 dB: R&S FK896D, model

04) at 10% spacing from center fre-

quency

(f = 1.5 MHz to 30 MHz)

Gain 0 to +2 dB

Tuning time <10 ms

Inband IP3≥34 dBm (≥30 dBm: R&S FK896D,

model 04)

Noise figure 13 dB typ.

RF input voltage protection

Response threshold

≥200 V EMF (Zin =50 Ω)

>10 V EMF or >4 A

General data

Broadband IF Output R&S GM893

(model 03)

Output frequency 41.44 MHz

3 dB bandwidth >1 MHz

Attenuation <10 dB relative to antenna input

Impedance 50 Ω

Oven-controlled frequency standard aging/day ≤1 x 10–9 (OCXO)

Environmental conditions

Operating temperature range

Permissible temperature range

Storage temperature range

Humidity (non-condensing)

to MIL-STD-810 D

−10°C to +45°C

−25°C to +55°C

−40°C to +80 °C

max. 95 % at +40°C

Vibration test 10 to 55 Hz; 0.4 mm double amplitude

Shock test 30 g, 11 ms

EMC to MIL-STD-461/462

MTBF >14 000 h

Power supply 100/120/220/240 V −15/+10%,

47 Hz to 420 Hz (approx. 25 VA to

75 VA, depending on model)

Dimensions (W x H x D), weight

R&S EK895

R&S EK896

211 mm x 132 mm x 460 mm,

approx. 8 kg

426 mm x 132 mm x 460 mm,

approx. 11 kg

Digital VLF-HF Receivers R&S® EK895/R&S® EK896 11

Ordering information

Digital VLF-HF Receiver R&S EK895

Remote control via serial interface 6057.8996.02

With control panel; for local and remote control 6057.8996.12

With control panel; for local and remote control; with built-in OCXO 6057.8996.14

With control panel; for local and remote control; with built-in OCXO;

LINK11 reception 6057.8996.17

With control panel; for local and remote control; with built-in OCXO;

LINK11 reception; for use with external frequency standard 6057.8996.37

With control panel; for local and remote control; with 1.44 MHz IF output 6057.8996.63

Digital VLF-HF Search Receiver R&S EK896

Control panel with speaker; for local and remote control 6038.2509.12

Control panel with speaker; for local and remote control; with built-in OCXO 6038.2509.14

With control panel; for local and remote control; with built-in OCXO;

LINK11 reception 6038.2509.17

With control panel; for local and remote control; with built-in OCXO;

LINK11 reception; for use with external frequency standard 6038.2509.37

Plug-in modules (R&S EK895, R&S EK896)

Preselection Unit R&S FK890H1 6007.7750.02

Digitally Tuned RF Selection

Stopband attenuation 20 dB; for R&S EK896 only R&S FK896D 6077.3019.02

Digitally Tuned RF Selection

Stopband attenuation 40 dB; for R&S EK896 only R&S FK896D 6077.3019.04

BCD Interface R&S GC890 6007.7809.02

Broadband IF Output R&S GM893 6051.8494.03

Recommended extras (R&S EK895, R&S EK896)

Transfer Software Package R&S EK890S3 6015.4492.02

Quasi-Continuous IF Bandwidth Control R&S EK895S7 6077.0510.02

Loudspeaker Unit R&S GA890L1 6041.6199.02

Remote Control Unit R&S GB899 6037.3501.03

TTY Line Current Source R&S GH890 6007.6054.02

Service Kit R&S KA890C1 6030.9004.02

19" Assembling Kit for two R&S EK895

Desktop model R&S KA890L1 6041.6699.02

19" Assembling Kit for two R&S EK895

For rack installation R&S KA890L1 6041.6699.03

High-precision Oven-controlled Master Quartz Oscillator 6007.3255.03

IF Conversion to 455 kHz R&S UX895 6077.0261.02

19" Adapter Kit

For one R&S EK895 and one blank panel R&S ZZA-98 0827.4533.00

Rohde& Schwarz GmbH & Co. KG ⋅ Mühldorfstraße 15 ⋅ 81671 München ⋅ Germany

P.O.B. 8014 69 ⋅ 81614 München, Germany ⋅ Telephone +49 89 4129-0 ⋅ Fax +49 89 4129-13663 ⋅ www.rohde-schwarz.com

Printed in Germany (Pe bb)

R&S® is a registered trademark of Rohde&Schwarz GmbH&Co. KG · Trade names are trademarks of the owners

PD 0758.0251.32 ⋅ Digital VLF-HF Receivers R&S® EK895/R&S® EK896 ⋅ Version 04.00 ⋅ June 2003 ⋅ Data without tolerance limits are not binding ⋅ Subject to change