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8

WJ-8711A

 (Maximum)

     (Typical)

3-dB BW

Shape Factor

Group Delay Variation

(kHz)

(3/60 dB)

(100% of 3-dB BW)

0.3

  1.35:1

     50 µS

1.0

  1.40:1

     30 µS

3.2

  1.25:1

     30 µS

6.0

  1.25:1

     40 µS

16.0

  1.25:1

     60 µS

USB/LSB/ISB (3.2)

  1.25:1

     30 µS

IF Filter Specifications

MIL-STD-810D Test Method

A.

 Low Temperature ......................................... Test Method 502.2

B.

High Temperature ......................................... Test Method 501.2

C.

Humidity ........................................................ Test Method 507.2

D.

Altitude ......................................................... Test Method 500.2

E.

Vibration ....................................................... Test Method 514.3

F.

Shock ........................................................... Test Method 516.3

Operating Temperature ........................................................ 0 to +50

o

C

Storage Temperature ........................................................... -40 to +70

o

C

Humidity ............................................................................... 10 cyclic days (240 hours); Procedure III for continuous

exposure to 95% RH

Altitude ................................................................................. 50,000 ft (15,240 meters) non-operating

24,000 ft (7,315 meters) operating

Vibration

(1)

A.

Basic Transporation (secure cargo)
Category 1 .................................................... Random vibration 1.04Gs non-operating (2 hours)

B.

Ground mobile (wheeled or
tracked vehicle) Category 8 ........................... Random vibration 6.0Gs  operating (15 minutes)

C.

Marine (shipboard vessel not
specified) Category 9 ..................................... Random vibration 1.0Gs operating (2 hours)

D.

Environmental stress
 (NAVMAT-P-9492) ....................................... Random vibration 6.0Gs  operating (15 minutes for design

qualifications) 3.06Gs nonoperating [10 minutes for
production screening (ESS)]

Shock

(1)

................................................................................. Bench handling (field service) 8 drops total onto a horizon-

tal hard wooden surface, operating

MTBF .................................................................................... In excess of 10,000 hours; estimated in accordance with

MIL-HDBK 217E for Ground Fixed; +40

o

C environment

EMC ..................................................................................... EN50081-1 (radiated & conducted emissions to EN55022,

Class B)

EN50082-1 (including IEC 801-2:1984, IEC 801-3:1984
& IEC 801-4:1988)

EN55020 (Immunity for Receivers)

Safety .................................................................................... IEC 1010-1:1990+A1/EN61010:1993

Power Requirements ............................................................ 97 to 253 Vac (47 to 440 Hz)

Power Consumption ............................................................. 35 W, typical with options

Environmental Specifications

Summary of Contents for WJ-8711A

Page 1: ...om 0 5 to 20 seconds or infinite In channel scan mode 100 programmablememorychannelsareavailable Sectorsof memorycanbespecifiedforindividualchannelscans Digital HF Receiver WJ 8711A Features Frequency...

Page 2: ...e exception of the front panel mountedheadphonejack Theantennaand externalreferenceinputs aswellasthesignalmonitor andpredetectedIFoutputs areavailableonBNC connectors Speakeranddual balancedlineaudio...

Page 3: ...0 20 40 60 80 10 0 110 1 2 0 GA I T HE RS B UR G M D U S A REMOTE CONTROL BY RS 232 OR CSMA CD DEDICATED CONTROLS FOR SCANNING AND MEMORY FUNCTIONS ILLUMINATED SIGNAL STRENGTH METER CALIBRATED IN dBm...

Page 4: ...maninternal10 MHz oscillator that can be locked to an external reference input of 1 2 5 or 10 MHz The WJ 8711A auto maticallysensesandswitchestotheexternalrefer enceuponapplicationofsignal Allcritical...

Page 5: ...tainidenticalaudio signals Thesetwoaudiopathsareprocessedto providea2 channelheadphoneoutput twobalanced 600 ohmlineaudiooutputsandan8 ohmspeaker outputcontainingoneorbothaudiochannelsinISB mode After...

Page 6: ...preamplifier engaged Detection Modes AM SAM FM CW USB LSB ISB consult factory for additional demodulation modes Minimum IFBW S N N Without Preamp Modulation kHz dB Min dBm mV AM 50 mod at 400 Hz 6 0 1...

Page 7: ...14 dBm referred to the RF input Blocking An unwanted signal 1 mV separated 20 kHz from a desired signal of 1 mV will not cause the IF output to fall by more than 3 dB Line Audio Outputs Number of Outp...

Page 8: ...andom vibration 1 04Gs non operating 2 hours B Ground mobile wheeled or tracked vehicle Category 8 Random vibration 6 0Gs operating 15 minutes C Marine shipboard vessel not specified Category 9 Random...

Page 9: ...button functions become especially useful when the WJ 8711A 3 acts as an RF front end for certain DF applications Technical Update WATKINS JOHNSON December 1996 Digital HF Receiver WJ 8711A Specifica...

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