INSTRUCTION FOR USE EM 203
CONTENTS 1 TECHNICAL OVERVIEW 1.1 1.2 1.3 1.4 2 POSSIBLE TRANSMITTER/RECEIVER COMBINATIONS 2.1 2.2 2.3 3 EM 203 receiver/SK 2012 TV(HiDyn plus®) and SKM 4031 HiDyn plus® EM 203 receiver/SK 50/250 UHF and SKM 5000 (HiDyn plus®) EM 203 receiver/SER 20 transceivers PUTTING THE EM 203 TO WORK 3.1 3.2 3.3 3.4 4 Computer Control Diversity HIDYN plus® noise reduction system Block diagrams Mains connection Antenna connection AF connection Start-up procedure/operating indicators AVAILABLE MODULES 4.
Introduction The wireless Mikroport multi-channel sound transmission system EM 1046 is a transmitter/receiver system in a modular design. It offers comfortable handling and can be relied on for dependable service. • 3-channel diversity receiver EM 203 with microprocessor-controlled receiver modules • Ultimate flexibility in the selection of transmitter and receiver frequencies thanks to easy-to-replace PROMs and EEPROMs. The present manual shall help you to get acquainted with the EM 203 receiver.
Technical overview Computer control Diversity HiDyn plus® noise reduction Block diagrams 1 1.1 1.2 1.3 1.
Computer control 1.1 Every single EM 1046 RX receiver module has an in-built microprocessor for the RF section, the operating elements and all indicators. It serves to control the following components or parameters: • • • • • • • • • • phase locked loop (PLL) synthesizer function of keys 8 digit LED display two LED bargraph displays true diversity monitoring squelch threshold description fields stand-by storage of all receiver parameters (e. g.
1.2 Diversity Control signal Receiver 1 Control signal Automatic electronic switching of audible frequency signal Receiver 2 Steuersignal Every EM 1046 RX receiver module operates on true diversity. An antenna splitter, integrated into the chassis, serves to route the antenna signals from both antennas to the three receiver modules.
HiDyn plus® 1.3 DYNAMICS OF THE AF INPUT SIGNAL COMPRESSION AT THE TRANSMITTER HIDYN plus® EXPANSION AT THE RECEIVER HIDYN plus® DYNAMICS OF THE AF OUTPUT SIGNAL DYNAMICS OF THE AUDIO SIGNAL IN THE RF-SIGNAL (MAX 60 DB) SYSTEM NOISE PLUS MODULATION/DEMODULATION NOISE IN THE TRANSMITTER PATH »HIDYN plus®« NOISE REDUCTION SYSTEM The »HIDYN plus®« noise reduction system serves to reduce the effects of RF interference fields.
Block diagram EM 203 1.
Possible transmitter/ receiver combinations 2 EM 203 receiver/ SK 2012 TV (HiDyn plus®) and SKM 4031 TV-HiDyn plus® Transmitters 2.1 EM 203 receiver/ SK 50/250 UHF and SKM 5000 (HiDyn plus®) Transmitters 2.2 EM 203 RECEIVER/ SER 20 TRANSCEIVER 2.
2.1 EM 203 receiver/ SK 2012 TV (HiDyn plus®) and SKM 4031 TV-HiDyn plus® MKE 2-2 R MKE 10-2 R NOTA BENE SK 2012 body-pack transmitters can be retrofitted (change from HIDYN® to HIDYN plus®) to make them suitable for use with EM 1046 receivers. SK 2012 TV (HiDyn plus®) To this purpose please send the transmitters to be retrofitted to Sennheiser's Service Department, 30900 Wedemark. Attention: After the transmitters have been retrofitted, they are no longer compatible with HIDYN®.
2.
EM 203 receiver/ SER 20 transceiver 2.3 Retrofitted SER 20 transceivers (change from HIDYN© to HIDYN plus©) can be used in conjunction with EM 203 receivers. SER 20 transceiver with HiDyn plus© Refer retrofitting to Sennheiser distributors or Sennheiser's Service Department, 30900 Wedemark, Germany. At the time that the present brochure went to print the retrofit kit for the SER 20 transceiver was already under development.
Putting the EM 203 receiver to work 3 Mains connection 3.1 MANIPULATION EM 203, Publ. 10/94 engl Antenna connection 3.2 AF connection 3.3 Start-up procedure/ operating indicators 3.
Mains connection 3.1 Power is supplied by a plug-in power supply unit. The power module is available as a 110, 230 or 240 V AC model. The unit can easily be adapted to changing power requirements by replacing the power module. Connection of the plug-in power supply unit is via socket P at the back panel of the EM 203. P Antenna connection The two antennas needed for diversity operation (see ch. 1.2) connect to sockets A and B on the EM 302RI module (N-type sockets). 3.
Start-up procedure/ Operating indications 3.4 POWER + 12 V - 12 V +5V DC - A DC - B OL - A OL- B REMOTE + 20 dB + 20 dBu MANIPULATION FUNCTION Switch on the receiver: This is how the channel module indicates that it is ready for operation (after power-up). The three LED indicators for the operating voltages light up (see ch. 4.2.1). DISPLAY (RX) The display changes after about 5 seconds It shows the frequency on which the mdoule is operating or the name of the user, e. g.
Available modules 4 EM 1046 RX receiver module 4.1 Monitor 4.
EM 1046 RX receiver module 4.1 Adjustment 4.1.1 Receiver frequencies 4.1.2 Squelch 4.1.3 Selection RF Signal level/deviation/ battery condition 4.1.4 Display Text/frequency/battery condition 4.1.5 Entry of brief texts 4.1.6 System configurations and specifications 4.1.7 Remote monitoring Of transmitter battery 4.1.8 Monitoring of audio signals 4.1.9 Stand-by 4.1.
OPERATING ELEMENTS ON THE EM 1046 RX MODULE 8 DIGIT ALPHANUMERIC LED DISPLAY RACK CONNECTOR (invisible) KEYS TO CONTROL THE MENU AND TO PROGRAM THE MODULE DIVERSITY CHANNELS INDICATOR FOR REMOTE MONITORING LED BARGRAPH DISPLAYS FOR DEVIATION/RF SIGNAL LEVEL/ BATTERY CONDITION MONITOR KEY STAND-BY APPROVAL NUMBER
Adjustment 4.1.1 DIVERSITY A B MENU Y N SET ESC MANIPULATION FUNCTION Depress an arbitrary menu key on the EM 1046 RX receiver module: The receiver switches to the menu mode. It is now ready for data entry. Y Receiver operation remains unaffected.
Receiver frequencies DIVERSITY A B 4.1.2 MENU Y N SET ESC FUNCTION MANIPULATION DISPLAY (RX) Chose option "RX-Freq." (chapter 4.1.1). Depress SET to allow the receiver frequencies to be selected. The "M" on the display starts blinking. The EM 1046 RX receiver module can be configured as follows: • • operation on max.
CONTINUED FROM PAGE 20 / CH. 4.1.2 FUNCTION MANIPULATION DISPLAY (RX) Use keys Y UP N DOWN to select a receiver frequency as per pre-programmed parameters. • • Freely selectable receiver frequencies can easily be adjusted in a 5 kHz grid. The unit changes automatically from one grid to another. • For standard frequencies the display automatically switches to the next channel. Keeping the key depressed acdelerates selection. Depress SET to store new frequency.
CONTINUED FROM PAGE 21 / CH. 4.1.2 MANIPULATION FUNCTION Depress The new frequency is stored in the memory. The EM 1046 RX receiver module switches to the new frequency selected. Y DISPLAY (RX) Y = YES ! For a short time the display indicates to store data or depress The program returns to the selection mode. N N = NO ! or ESC Additional frequencies can be selected, if need be. The program returns to the menu. The display shows: to stop storage.
Squelch 4.1.3 DIVERSITY A B MENU Y N SET ESC FUNCTION MANIPULATION DISPLAY (RX) Choose option „Squelch“ (see ch. 4.1.1) Depress SET to allow the squelch threshold to be set. Use keys Y UP N DOWN In addition, the left-hand LED bargraph display indicates the squelch threshold: to select the squelch threshold. • Keeping the key depressed accelerates adjustment. Depress and subsequently: • Use the RF scale (µV) to read off the squelch threshold.
Selection RF signal level/deviation/batery condition DIVERSITY A B 4.1.4 MENU Y N SET ESC MANIPULATION FUNCTION Choose option "DEV", "RF" or "BAT" to indicate the RF signal level, deviation or battery condition. It is useful to have permanent settings to facilitate day-to-day applications. The LED bargraph displays on the EM 1046 RX receiver module can be set to four different modes: Depress key SET DISPLAY (RX) to allow selection.
DIVERSITY A B DEV. MENU Y N SET RF. ESC CONTINUED FROM PAGE 24, CH. 4.1.4 FUNCTION MANIPULATION Use Y or N DISPLAY (RX) DEVIATION/FIIELD STRENGTH to be indicated: to select the parameters to be indicated. Depress and subsequently SET Y Y = YES ! N N = NO ! to store the latest setting or depress to stop storage.
DIVERSITY A B MENU Y RFA N SET ESC RFB CONTINUED FROM PAGE 25, CH. 4.1.4 FUNCTION MANIPULATION Use DISPLAY (RX) FIELD STRENGTH OF CHANNELS A/B (DIVERSITY) Y to be indicated: or N to select the parameters to be indicated. Depress and subsequently SET Y Y = YES ! N N = NO ! to store the latest setting or depress to stop storage. After having depressed Y and ESC NOTA BENE This display allows to monitor the RF level of both diversitiy channels and indicates possible antenna problems.
DIVERSITY A B MENU Y DEV A N SET ESC DEV B CONTINUED FROM PAGE 26, CH. 4.1.4 FUNCTION MANIPULATION Use Y or N DISPLAY (RX) DEVIATION CHANNELS A/B (DIVERSITY) to be indicated: to select the parameters to be indicated. Depress and subsequently SET Y Y = YES ! N N = NO ! to store the latest setting or depress to stop storage. After having depressed and Y ESC The left-hand bargraph display indicates % 150 DEV (= deviation) in % for diversity channel A.
DIVERSITY A B MENU Y N SET ESC CONTINUED FROM PAGE 27, CH. 4.1.4 FUNCTION MANIPULATION Use Y or N DISPLAY (RX) TRANSMITTER BATTERY CONDITION/FIELD STRENGTH to be indicated: to select the parameters to be indicated. Depress and subsequently SET Y Y = YES ! N N = NO ! to store the latest setting or depress to stop storage.
Display Text/frequency/battery condition DIVERSITY A B 4.1.5 MENU Y N SET ESC FUNCTION MANIPULATION DISPLAY (RX) Choose option "DispConf" (see ch. 4.1.1). Depress SET The display can be set to two modes. to allow the display to be set. Use Y • UP It indicates the receiver frequency of the EM 1046 RX receiver module (see ch. 4.1.2) or N DOWN • to select the parameters to be indicated. it indicates the text entered, e. g. the actors' names who use the transmitters (see ch. 4.1.
Entry of brief texts 4.1.6 DIVERSITY A B MENU Y N SET ESC FUNCTION MANIPULATION DISPLAY (RX) Choose the option to enter brief text (ch. 4.1.1). Depress The display indicates the latest text entered. Thefirst segment of the eight alphanumeric segments starts blinking. SET to allow a brief text to be entered. Use Y or N NOTA BENE • to select the letters, numbers or special characters to be indicated with each segment.
System configurations and identification data DIVERSITY A B 4.1.7 MENU Y N SET ESC MANIPULATION FUNCTION Choose the option to set the display (ch. 4.1.1). The receiver specifications are stored in every single module: Depress SET DISPLAY (RX) The display indicates the MODEL/SERIES to return to the display mode. • • Use or EM 1046-U-L UHF ( 450 - 790 MHz) EM 1046-U-H UHF ( 630 - 960 MHz) Y SERIAL NUMBER OF THE MODULE N Every module has a serial number to facilitate its identification.
Remote monitoring of transmitter battery DIVERSITY A B 4.1.7 MENU Y N SET ESC MANIPULATION FUNCTION Choose the option to indicate the condition of the transmitter battery (see ch. 4.1.1). The EM 1046 RX receiver module distinguishes between two types of power supply: the transmitters can be powered by batteries or rechargeable batteries. Depress DISPLAY (RX) SET to select the display mode for the indication of the battery condition.
CONTINTUED FROM PAGE 32, CH. 4.1.8 MANIPULATION FUNCTION DISPLAY (RX) CAPACITY OF RECHARGEABLE BATTERIES: Capacity of 100 % Capacity of about 80 % Capacity of about 60 % Capacity of about 40 % NOTA BENE Use the luminous band for permanent monitoring of transmitter batteries (see ch. 4.1.4). If the remaining operating time falls below half an hour (during normal operation), the EM 203 receiver display indicates "Low Batt!" at short intervals. EM 203, Publ.
Monitoring of audio signals DIVERSITY A B 4.1.8 MENU Y N SET ESC MANIPULATION FUNCTION DISPLAY (RX) It is only possible to monitor the active channel, i. e. one channel at a time. Depress The LED on the monitor key lights up if the key is depressed, i. e. monitoring is possible. to monitor the audio signal via headphones connected to the mainframe. Depress once again to stop monitoring. EM 203, Publ.
Stand-by 4.1.9 DIVERSITY A B MENU Y N SET ESC FUNCTION MANIPULATION DISPLAY (RX) In some situations it is useful not only to mute the audio signal at the mixing console but also to switch off the complete RF section of the EM 1046 receiver module. Two reasons of several possible are: • the wish to have only active channels indicated or • the need of fault finding in case of RF interference.
Monitor 4.2 LED indicators 4.2.1 Monitor headphones 4.2.2 OPERATING ELEMENTS ON/OFF SWITCH POWER INDICATORS BOOSTER INDICATORS (INCL. OVERLOAD) 20 dB GAIN FOR MONITORING MONITORING VOLUME REMOTE SWITCH (REMOTE CONTROL) WITHOUT FUNCTION! MONITOR HEADPHONES (STEREO, 6,3 mm Ø MIN. IMPED.
LED indicators 4.2.1 POWER + 12 V - 12 V +5V DC - A DC - B OL - A OL- B REMOTE + 20 dB + 20 dBu MANIPULATION LED DISPLAY FUNCTION DISPLAY (RX) The three upper LEDs light up if the in-built power supply unit operates perfectly + 12 V supply voltage = 12 V - 12 V supply voltage = -12 V +5V supply voltage = 5 V If one LED switches off, please replace the complete power module and return it for fault finding. 'The other four LEDs serve to monitor the antenna boosters connected (e.g.
Monitor headphones 4.2.2 POWER + 12 V - 12 V +5V DC - A DC - B OL - A OL- B REMOTE + 20 dB + 20 dBu MANIPULATION FUNCTION DISPLAY (RX) The monitor socket is suited to connect mono or stereo headphones with an impedance of about 50 to 300 Ω. The rotary switch serves to adjust the volume. The "+ 20 dB" switch increases the signal level at the monitor socket by 20 dB. This facilitates the identification of residual noise. NOTA BENE The max. output level at the monitor socket amounts to + 18 dBm.
Technical data Frequency range 5 450 - 790 MHz with RX module item no. 03246 760 - 960 MHz with RX module item no. 03247 Bandwidth 24 MHz Channel spacing, min. 300 kHz Channel grid, min. 5 kHz 1st oscillator frequency (1st LO) 71 MHz below / above Fe 1st intermediate frequency (1st IF) 71 MHz 2nd oscillator frequency (2nd LO) 81.7 MHz 2nd intermediate frequency (2nd IF) 10.
SENNHEISER ELECTRONIC KG 30900 Wedemark Subject to alterations. Errors and omissions excepted! Publ.
