No abstract

No abstract

The Carl Zeiss 1-m telescope at Vainu Bappu Observatory uses synchro transmitters as angular transducers in a three-stage geared train for the two-axis coordinate display system. Synchroreceivers are used in the console with analog dials displaying the position coordinates. In this approach the transmitters exhibit good performance and the receivers often suffer from dial sticking, thereby resulting in ambiguous and inaccurate readings. The original Carl Zeiss display system has a resolution of about 15 and 30 arcsec in RA and DEC axes, respectively. A new digital display system has been developed which replaces the synchro receivers with suitable electronics while retaining the synchro transmitters. This approach has resulted in better resolution (1.25 and 2.5 arcsec for RA and DEC, respectively) and accuracy over the analog dial display. This paper presents the hardware and software details of our implementation.