Haven't kept track but I believe there are PC based processor cards or processing software out there that run in this upper hundred dollar range that are designed for streaming applications. However, if you don't need to do all this the better course of action is to E-bay the 8100 (they still seem to run around $800~$1,000). You will need a bridging balanced input to the computer (or something like the Lexicon Alpha analog to USB device to feed the computer which is balanced in). Then you connect the (processed) audio output of the ST chassis to your streaming computer as well as to the input of the 8100. Adjust pot for minimum response on R, using.
Then set the generator for L output, and measure the audio response on R.
The compressor and limiter cards (cards 3,4, and 5) from the 8100 go into the ST chassis, while a pair of substitute 3 and 4 cards (with just a small isolation amplifier) go into the 8100 card cage. If using an FM stereo generator, set the generator to produce FM Stereo, 10 pilot level, 75kHz FM modulation, at an RF output level that will produce full quieting, such as 1mV into 75 ohms.
The ST chassis was originally designed to be used where the FM transmitter was driven over a pair of equalized phone lines or discrete (separate left and right) STL's. If you need the Optimod to drive an FM transmitter as well as a web stream you could pick up a "complete" Orban ST chassis. This transmitter will allow the customer to turn down the power to less than 1 watt in case it is needed.There is a way to do this-whether there is a point in doing this is another question. It is recommended that the customer listen to the open frequency on the outskirts of where they plan to broadcast and then listen again when transmitting to be sure their transmission is not outside the 250 μV/m at 3 m required for Part 15. Do NOT use adjacent to another current FM frequency in use because it could easily interfere. If using to transmit and comply with Part 15 requirements, the customer must make sure that they are using a frequency that is open. If using above 1 watt, the FCC requires either a STA (Special Temporary Authorization) or the normal FM broadcast license. This transmitter does NOT have Part 15 approval and could be subject to heavy FCC fines for operating without a license. Please be aware that the FCC requires Part 15 Transmitters to be approved by the FCC. A single programmable DSP IC performs the functions of pilot and subcarrier generation, matrixing, modulation, and test tone generation.
It can be turned down to 1 watt and if used with the antenna included, will comply with Part 15 transmission requirements. The design of a composite FM stereo generator based on digital signal processing (DSP) techniques is described.
Please take a look at the below related repair forum topics. For the AM side there were no problems so far. + Noise 0.4% or less 15KHz (0.2 typical)įM5 is FCC SDoC approved (Supplier Declaration of Conformity Title 47, 2.906). RCA BTS-1A WORLDS FIRST BROADCAST FMSTEREO GENERATOR BTS1A 1962 BTS 1A WORLD FM STEREO WORLD-S FM-STEREO If you have any question about repairing write your question to the Message board. This RF generator could do nicely AM and FM modulation on all the broadcast bands. 10 dBm to +10 dBm selectable for 75KHz deviation response Stereo Operation w/ built in Stereo Generator
+/-120 kHz, better than –25dB, +/-240 kHz better than –35dBġ1 x 16.5 x 1 inches (27.94 x 41.91 x 2.54 cm) About half of the transmitters circuit board is dedicated to the stereo generator circuitry while the remainder contains the frequency generation, modulation. Better than +/- 2kHz over operating rangeĭirect frequency modulation of carrier (typical +/-200Hz)īetter than 50dB referenced to 100 modulation 100Hz de-emphasisīetter than 50dB with 100% modulation (typical >60dB)