Hallikainen and Friends TEL171 Converter
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DIGITAL TELEMETRY CONVERSION KIT
The TEL 171 converts your Moseley TRC-15AW or TRC-15AR to digital metering transmission, a method that eliminates the offset and gain drift in the analog metering.
A local display in the Transmitter
control unit duplicates the readings displayed by the studio control unit. This permits one-man weekly meter calibration.
The system consists of printed circuit boards which substitute directly for the audible metering generator, the audible metering demodulator, and the meter. The local display for the Transmitter
control unit includes a replacement front panel and a liquid crystal display printed circuit board.
installation is quick and simple since the same PC mounting hardware is used, and the same wiring harness connects to the new boards.
3 1/2 digit (-1999 to +1999) display are used. These easily read displays are updated twice a second. Should the metering carrier be lost, or a framing or parity error occur, the display at the studio will blank and a front panel LED will indicate the problem.
Through the use of digital transmission and display, we eliminate the error inherent in analog transmission, and simplify the task of remote meter calibration and meter reading.
Moseley, our neighbors down the road, make a good remote control. We can make it better.
Service and User Manual
2.18 Mbytes (2287568 Bytes)
Scanned document, reading partly badly, partly not readable.
30 May 2020
Installation, Operation and Maintenance
WARRANTY ... 1
INTRODUCTION ... 2
INSTALLATION ... 5
OPERATION ... 10
INSTALLATION IDEAS ... 11
THEORY OF OPERATION ... 13
1221TT ... 13
1221TR ... 20
Telemetry Display 1231TD ... 23
Local Display 1281LD ... 25
CIRCUIT ADJUSTMENTS ... 28
1211TT telemetry Transmitter
1221TR telemetry Receiver
. ... 28
PARTS LIST ... 30
1211TT ... 30
1221TR ... 33
1231TD ... 36
1281LD ... 37