FM Monitoring Demodulator FKDL
The FM Monitoring Demodulator FKDL, continuously tunable from 87.5 to 108 MHz, is used for monitoring carrier signals modulated with mono or stereo signals in accordance with the relevant CCIR recommendation. It is connected to the transmitter output via directional couplers or voltage dividers and delivers demodulated mono, multiplex, L and R signals for the usual performance checks on FM transmitters.
When a precision stereodecoder (e. g. MSDC 2 of R&S) is connected to the MPX signal output, quality parameters of FM stereo transmitters can be measured. A modified FKDL (specifications on request) is available for monitoring FM European paging transmitters.
Inputs
The RF input signal is applied either at the front or the rear panel.
Indication
Analog display of the AF voltages of the Land R channels is provided by an LED array for each channel (32 diodes per array). One of the LED arrays can be switched over at the front panel to indicate the frequency deviation of the transmitter. Additional LEDs signal stereo mode selection, sufficient carrier level and tuning to the carrier midpoint.
Outputs
A low-impedance output on the rear panel of the FM Monitoring Demodulator FKDL delivers the mono signal for monitoring and measuring purposes. The multiplex signal is available at two parallel, low-impedance outputs on the front and rear panel. A headphones output with volume control for L and R signals is fitted on the front panel.
Construction
The FM Monitoring Demodulator FKDL comes as a 44-mm high 19" rackmount with a power supply of its own. The connectors are fitted on the front and rear panel.
ROHDE & SCHWARZ GmbH & Co. KG
Muehldorfstrasse 15, 81671 Munich, Germany
Phone: +49 89 41 29 - 0
Fax: +49 89 41 29 12 164
e-Mail: CustomerSupport@rohde-schwarz.com
Internet: http://www.rohde-schwarz.com/
