Atec IFRMLS800 User Manual

For the very latest specifications visit www.aeroflex.com

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Avionics

MLS-800 Microprocessor Controlled Ground Station Simulator

• Test Operational Menu supports ICAO
1985 and EUROCAE ED-53A and
ED-36A

• Complete Main Path Simulation:
Approach (AZ) and High Rate Azimuth
(HiAZ) Elevation (EL) Back Azimuth (BAZ)
Flare (FL)

• Complete Multi-path (MP) Simulation
Capability:
Interference Pulses
Selectable Fade Rate Modulation of 0.05,
1 and 1000 Hz

• Control of all Beam Parameters:
Angular Position Beam Amplitude
Referenced to the Preamble Norm and
Half Width Pulse Selectable Beam Width
at 0.5°, 1°, 2°, 3°, 4° or 5°

• Sync Capability for: External Monitoring
Designating PFE and CMN Function
Designating Multi-path Function

• Preamble Parity, Symmetry and Percent
Update

• Simulates all Basic Data Words plus
Auxiliary Data Words with Parity Selection

• Full Range of MLS Channels

Aeroflex is a leader in the design, manufacture
and marketing of Avionics test systems.

The MLS-800 is a microprocessor controlled Ground Station
Simulator designed to operate from a bench test environment. Test
parameters are selected via a 44-position keyboard and displayed on
test operational menus.

Other Features

• OCI Control for Right (RT), Left (LT) and Rear (RR)

• 75 dB AZ to EL Ratio Capability Propellor/Rotor Modulation at 1
to 100 Hz Variable in 1 Hz steps Morse Code Identification
Capability

• ARINC 429 Receiver with PFE and CMN calculations

• External RF Reference Input

• Clearance Pulse Simulation

• 6.75 Hz Modulation

• IEEE-488-1978 Interface for Remote Control Operation

SSPPEECCIIFFIICCAATTIIOONN

GGEENNEERRAALL RREEQQUUIIRREEMMEENNTTSS

• Unless otherwise noted the following equipment performance char-

acteristics are warranted over the specified environmental conditions
following a 20 minute warm-up period.

• All RF measurements are referenced to 50 Ω.

• Accuracy and resolution stated in percent are referenced to measured

or desired values.

• Where resolution exceeds accuracy, resolution takes precedence.

• Notes are intended to provide information useful in applying the

instrument by giving specific setup information. Notes are found in
the notes section of this specification.

RRFF SSIIGGNNAALL GGEENNEERRAATTOORR

FREQUENCY

Frequency Range

5031.0 to 5090.7 MHz

Steps

0.3 MHz

Accuracy

±1.0 kHz

OUTPUT POWER

Level Range

-17 to -122 dBm

Level Accuracy

±2.0 dB

Level Flatness

±0.5 dB at -20 dBm (Note 1 and 2)

Attenuator Accuracy

±1.0 dB

Attenuator Monotonicity

±0.5 to 1.5 dB (Each Step)

Spectral Purity

Noise Floor

Offset ± 0.3 to 1.2 MHz from Cf

-105 dBc/Hz (Note 3 and 4)

Residual FM Modulation

<1 kHz peak, 0.01 to 15 kHz BW

Residual Phase Modulation

<0.5 radians peak, 0.3 to 15 kHz BW

Spurious Signal Rejection (in-band)

From ±0.3 to 1.2 MHz

45 dBc

From ±1.2 to 30 MHz (band end)

65 dBc

Spurious Signal Rejection (out of band)

From 5120 to 5250 MHz

50 dBm

From 50 kHz to 12.4 GHz (excluding 5000 to 5250 MHz)

35 dBm

MMOODDUULLAATTIIOONN ((NNoottee 55,, 66 aanndd 77))

MAIN PATH FUNCTIONS

BEAM ANGLES

Azimuth

±62°

High Rate Azimuth

±42°

Elevation

-1.5° to 29.5°

Flare

-2° to 10°

Back Azimuth

±42°

Angle Resolution

±0.05° steps

Angle Accuracy

±0.005°

Basic Data

All functions selectable on menu with selectable data values and parity

Auxiliary Data

All auxiliary data words selectable

BEAM SHAPE

Approximately sinx/x or 1/2 sinx/x waveforms at 1/2 width that fills time
slot. Sidelobes for 1/2 sinx/x are present on pulse side only.

BEAM WIDTH

Selectable to 0.5°, 1°, 2°, 3°, 4°, 5°

Accuracy

±10% of setting

Beam Level

Adjustable relative to preamble

Range

-3.0 to +13.0 dB (Note 6)

Resolution

1.0 dB steps

Accuracy

±1.0 dB

Side Lobes

Relative to beam level

Level

-20.0 dB, ±1.0 dB

OCI Pulses (Right, Left, Rear)

Width

100 ms, ±10 ms

Level

Adjustable relative to preamble

Range

-4.0 to +7.0 dB

RESOLUTION

1.0 dB steps

ACCURACY

±1.0 dB

DPSK MODULATION

Phase Shift

Logic Zero (0)

No transition

Logic One (1)

180°, ±10°

Amplitude Balance

±0.4 dB

TRANSITION TIME

<10

µ

s, 10% to 90%

MULTI-PATH FUNCTION

ANGLE

Selectable to maximum angle for selected function

ANGLE RESOLUTION

0.05° steps

ANGLE ACCURACY

±0.05°

BEAM SHAPE

Approximately sinx/x or 1/2 sinx/x waveforms at 1/2 width that fills time
slot. Sidelobes for 1/2 sinx/x are present on pulse side only.

BEAM WIDTH

Selectable to 0.5°, 1°, 2°, 3°, 4°, 5°

For the very latest specifications visit www.aeroflex.com

Accuracy

±10% of setting

Beam Level

Adjustable relative to preamble (Note 6, 8 and 10)

Range

-14.0 to +13.0 dB

Resolution

1.0 dB steps

Accuracy

±1.0 dB, -3.0 to +13.0 dB

±2.0 dB, -14.0 to -4.0 dB

SIDE LOBES

Relative to beam level

Level

-20.0 dB, ±1.0 dB

Main Path to Multi-path

±1.0 dB tracking error

FADE RATE

Frequency Range

Selectable 0.05, 1 and 1000 Hz

Accuracy

±1.0 %

Steps

Eight discrete steps that approximate a sine wave

Clearance Pulses (Note 9)

Position

Two pulses spaced equidistant from 0.0°

Angle Resolution

±0.05°

Angle Accuracy

±0.05°

Pulse Width

50.0

µ

s, ±5.0 µs

AMPLITUDE

Range

-3.0 to +13.0 dB

Resolution

1.0 dB steps

Accuracy

±1.0 dB

AADDDDIITTIIOONNAALL FFUUNNCCTTIIOONNSS

AZ to EL RATIO

Selectable so Azimuth to Elevation function ratio is 0 or -75 dB

Accuracy

±2 dB

Interference Modulation

Propeller Modulation

Frequency

Variable 1 to 199 Hz

Resolution

1.0 Hz steps

Accuracy

±1%

Duty Cycle

-12 dB, ±2 dB applied for 15%, ±1%

Sync

Not in sync with any function

6.75 HZ MODULATION

Frequency

6.75 Hz

Accuracy

±1%

Level

Selectable ±6.0 dB square wave modulation to main beam (Note 6
and 10)

Accuracy

±1.0 dB

Sync

Not in sync with any function

MORSE CODE

Selection

Off, selectable or Continuous Tone

OSCILLOSCOPE SYNC

Selection

Selectable to occur at start of any function, basic or auxiliary data
word

Amplitude

Positive TTL pulse approximately 14

µ

s wide.

Note: Sync control specifies to which function or data word the tests

in Table 1 apply.

FUNCTION APPLICATION

P PARITY CONTROLS PREAMBLE PARITY

6.75 Hz ENABLES OR DISABLES 6.75 Hz MODULATION
UPDATE CONTROLS % UPDATE RATE
FADE RATE CONTROLS FADE RATE (APPLIED TO MULTI-PATH

BEAM)
SYMMETRY CONTROLS BEAM SYMMETRY
PROP MOD CONTROLS PROPELLER MODULATION

FREQUENCY
PFE MEASUREMENT OF PATH FOLLOWING ERROR
CMN MEASUREMENT OF CONTROL MOTION NOISE

Table 1 - Oscilloscope Sync

FUNCTION UPDATE RATE

Selection

100%, 75%, 55%, 45%, 25% and 0%

Accuracy

±3.9 %

FUNCTION UPDATE RATE AVERAGE RATE OVER 10
SECONDS

AZ 100 % 13.0 ±0.5 Hz
HiAZ 100 % 39.0 ±1.5 Hz
BAZ 100 % 6.5 ±0.25 Hz
EL 100 % 39.0 ±1.5 Hz

FUNCTION PREAMBLE PARITY

Selection

Function identified by Oscilloscope Sync selection is candidate to have
its parity bits individually inverted to provide a change in parity.

SCANNING BEAM TIME SYMMETRY

Selection

0 (OFF), ±60

µ

s in 1 µs steps referenced to proper timing from pre-

Part No. 46891/139, Issue 6, 08/06

CHINA Beijing

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CHINA Shanghai

Tel: [+86] (21) 5109 5128
Fax: [+86] (21) 5150 6112

FINLAND

Tel: [+358] (9) 2709 5541
Fax: [+358] (9) 804 2441

FRANCE

Tel: [+33] 1 60 79 96 00
Fax: [+33] 1 60 77 69 22

GERMANY

Tel: [+49] 8131 2926-0
Fax: [+49] 8131 2926-130

HONG KONG

Tel: [+852] 2832 7988
Fax: [+852] 2834 5364

INDIA

Tel: [+91] 80 5115 4501
Fax: [+91] 80 5115 4502

KOREA

Tel: [+82] (2) 3424 2719
Fax: [+82] (2) 3424 8620

SCANDINAVIA

Tel: [+45] 9614 0045
Fax: [+45] 9614 0047

SPAIN

Tel: [+34] (91) 640 11 34
Fax: [+34] (91) 640 06 40

UK Burnham

Tel: [+44] (0) 1628 604455
Fax: [+44] (0) 1628 662017

UK Cambridge

Tel: [+44] (0) 1763 262277
Fax: [+44] (0) 1763 285353

UK Stevenage

Tel: [+44] (0) 1438 742200
Fax: [+44] (0) 1438 727601
Freephone: 0800 282388

USA

Tel: [+1] [phone]
Fax: [+1] [phone]
Toll Free: 800 835 2352

www.aeroflex.com

[e-mail]

As we are always seeking to improve our products,
the information in this document gives only a general
indication of the product capacity, performance and
suitability, none of which shall form part of any con­tract. We reserve the right to make design changes
without notice. All trademarks are acknowledged.
Parent company Aeroflex, Inc. ©Aeroflex 2006.

Our passion for performance is defined by three

attributes represented by these three icons:

solution-minded, performance-driven and customer-focused.

amble Receiver Time Reference Code

External Reference Input

Variable 9.999940 to 10.000060 MHz at 3.0 dBm nominal

AARRIINNCC 442299 RREECCEEIIVVEERR

Rates

12.5 and 100 kbps data rates

Format

Return to Zero (RZ)

Levels

Logic "1" = +5 to 10 V input, typical

Logic "0" = -5 to -10 V input, typical

Transitions

Rise and fall times <1.5

µ

s

GGPPIIBB

Conforms to IEEE-488-1978 Standard for Talker/Listener

PPOOWWEERR

AC

Voltage

103.5 to 240 VAC

Frequency

45.0 to 440 Hz

Power Consumption

85.0 W, maximum

Fuse Requirements

2.5 A, 250 V, Type F

DC

Voltage

11.0 to 30.0 VDC

Fuse Requirements

7.5 A, 32 V min., Type F

BATTERY

Time Out

10 minute time out circuit to prevent accidental discharge. Low voltage
detect turns unit off prior to performance being affected.

Charge Cycle

At least 3 cycles or 30 minutes of charge life before recharge

EENNVVIIRROONNMMEENNTTAALL

Weight

22.7 kg (50 lbs.) Maximum

Dimension (with lid)

234.9 mm high x 539.75 mm deep x 355.6 mm wide

9.25 in. high x 21.25 in. deep x 14.0 in. wide

Operating Temperature

+10° C to +40° C

Storage Temperature

-40° C to +71° C

RREEFFEERREENNCCEE NNOOTTEESS

Note 1: Measured with 1000 Hz Fade Rate applied to Multi-path with

Multi-path OFF, 14 dB Pad applied, and Main Path in CW, 0
dB modulation

Note 2: 0.2 to 0.4 dB variation in level at Fade Rate is normal opera-

tion and is due to residual component of Multi-path signal.

0.8 dB variation is normal for Multi-path signal at Multi-path
= 0 dB, Main Path = OFF.

Note 3: -105 dBc/Hz is approximately equal to -60 dBc in a 30 kHz

bandwidth.

Note 4: Total spurious power should not exceed -15 dBc or -35 dBm

at -20 dBm level setting from 50.0 kHz to 12.4 GHz.

Note 5: Angular range is limited to slightly less than maximum range

for beam widths of 0.5° and 1.0° according to following table:

FUNCTION RANGE 0.5° RANGE 1.0°

AZ -61° to 61° -61.95° to 61.95°
EL -1.0° to 29.5° -1.0° to 29.5°
BAZ -41.75° to 41.75° -41.75° to 41.75°
FL -1° to 9° -1° to 9°
HiAZ -41° to 41° -41.95° to 41.95°

Note 6: RF preamble level plus modulation level should not exceed - -

10.0 dBm.

Note 7: Beam modulation level of +6 dB above preamble is assumed

unless specified.

Note 8: When clearance is selected, each pulse is individually selec-

table in amplitude.

Note 9: Selectable for AZ, HiAZ and BAZ functions only. Angular range

is ±1° to ±61° for AZ and ±41° for HiAZ and BAZ.

Note 10: Combined modulation level in a given time slot not to
exceed +15 dB relative to preamble. Includes main path and multi­path +6.75 Hz modulation.