SONY 7F 74L Service Manual

Service

EK 100

EK 300 IEM

EK 500

Part 1

Sennheiser electronic GmbH & Co. KG • D-30900 Wedemark • Tel. 0 51 30 / 600-0

EK 100, EK 300 IEM, EK 500

Änderungen vorbehalten / Subject to alterations / Sous réserve de modification

05/00 – 1

TECHNISCHE DATEN

(Werte in Klammern entsprechen typischen Werten)

HF-TEIL

Frequenzbereiche____________________________________________ 518 ... 550 MHz

630 ... 662 MHz

740 ... 772 MHz

790 ... 822 MHz

838 ... 870 MHz

Schaltbandbreite ____________________________________________ 32 MHz

Empfangsfrequenzen ________________________________________ 1280

Kanalabstand _______________________________________________ > 400 kHz

Frequenzraster ______________________________________________ 25 kHz

1. Oszillatorfrequenz _________________________________________ fe - 110,6 MHz

1.Zwischenfrequenz _________________________________________ 110,6 MHz

2.Oszillatorfrequenz _________________________________________ 121,4 MHz

2.Zwischenfrequenz _________________________________________ 10,8 MHz

Modulationsart ______________________________________________ FM-Mono; EK 300 IEM: FM-Stereo Nennhub ___________________________________________________ 24 kHz

Spitzenhub _________________________________________________ 48 kHz

Schaltschwelle der Rauschsperre ______________________________ 0 µ V ... 100 µ V; 5 dB Schritte

S/N=80 dB (unbewertet mit HDX) _____________________________ < 10 µ V (6 µ V); EK 300: Stereo < 100 µ V (60 µ V) S/N max (Spitzenhub mit HDX) ________________________________ > 100 dB(A) (117 dB(A))

NF-TEIL

Kompandersystem __________________________________________ HDX

NF-Ausgangsspannung (Nennhub) _____________________________ unsymmetr. 500 mVeff; EK 500: symmetr. 1Veff

NF-Ausgangsspannung (Spitzenhub) ___________________________ unsymmetr. 1,3 Veff 4 dBu;EK 500: 2,6 Veff 10 dBu Klirrfaktor bei 1 kHz und Nennhub _____________________________ < 1% (0,3%)

NF-Frequenzgang ____________________________________________ 50 Hz ... 18 kHz; -3 dB; EK 300 IEM: 50 Hz ... 15 kHz; -3 dB Pegel des Monitorausgangs / Last _____________________________ ausschließlich EK 500/EK 300 IEM: >100 mW / 32 Ω

ALLGEMEIN

Nennspannung ______________________________________________ 9 V

Betriebsspannung ___________________________________________ 6,0 ... 10 V

Stromverbrauch bei Nennspannung ____________________________ typ. 62 mA

Ruhestromaufnahme ________________________________________ < 100 µ A (30 µ A)

Batterie ____________________________________________________ IEC 6LR61 (PP3.6 AM 6.9V-E-Block Alkaline) Zulassung __________________________________________________ D810 008L RF

EK 100, EK 300 IEM, EK 500	Änderungen vorbehalten
05/00 – 2

TECHNICAL DATA

(Values in brackets are typical values)

RF STAGE

Frequency ranges____________________________________________ 518 ... 550 MHz 630 ... 662 MHz 740 ... 772 MHz 790 ... 822 MHz 838 ... 870 MHz

Switching bandwidth _________________________________________ 32 MHz

Receiver frequencies ________________________________________ 1280

Channel spacing _____________________________________________ > 400 kHz

Channel grid ________________________________________________ 25 kHz

1st oscillator frequency _______________________________________ fe - 110.6 MHz 1st intermediate frequency ____________________________________ 110.6 MHz 2nd oscillator frequency _______________________________________ 121.4 MHz 2nd intermediate frequency ____________________________________ 10.8 MHz

Modulation _________________________________________________ FM mono; EK 300 IEM: FM stereo Nominal deviation ___________________________________________ 24 kHz

Peak deviation ______________________________________________ 48 kHz

Squelch threshold ___________________________________________ 0 µ V ... 100 µ V; 5 dB steps

S/N=80 dB (unweighted with HDX) ____________________________ < 10 µ V (6 µ V); EK 300 IEM: stereo < 100 µ V (60 µ V) S/N max (peak deviation with HDX) ____________________________ > 100 dB(A) (117 dB(A))

AF STAGE

Compander system __________________________________________ HDX

AF output voltage (nominal deviation) __________________________ unbalanced 500 mVeff; EK 500: balanced 1 V rms

AF output voltage (peak deviation) _____________________________ unbalanced 1.3 Veff 4 dBu;EK 500: 2.6 Vrms 10 dBu THD at 1 kHz and nominal deviation ____________________________ < 1% (0.3%)

AF-Frequency response ______________________________________ 50 Hz ... 18 kHz; -3dB;EK 300: 50 Hz ... 15 kHz; -3 dB Monitor level / load __________________________________________ exclusive EK 500/EK 300 IEM: >100 mW / 32 Ω

GENERAL

Nominal supply voltage _______________________________________ 9 V

Operating voltage ___________________________________________ 6.0 ... 10 V

Current consumption at nominal voltage ________________________ typ. 62 mA

Stand-by current _____________________________________________ < 100 µ A (30 µ A)

Battery _____________________________________________________ IEC 6LR61 (PP3.6 AM 6.9V-E-Block Alkaline) Approbation ________________________________________________ D810 008L RF

Subject to alterations	EK 100, EK 300 IEM, EK 500
	05/00 – 3

EK 100, EK 300, EK 500 SIGNALFLUSSZUWEISUNG INTERCONNECTOR ASSIGNMENT

EK 100, EK 300 IEM, EK 500 05/00 – 4