QHYCCD QHY90A, Руководство пользователя

Страница: 17 / 29

QHY90A
17
07 Peripheral Ports on QHY90A
Note that the camera used in the picture above isn’t QHY90A, it is QHY16803A. They have the same
peripheral ports.
Serial ports
QHY90A provides two serial ports, which are connected to the built-in USB hub through FTDI
USB to Serial chip. These two serial ports provide standard RS232 signal level (±10V). You can use it to
connect your camera to electric focuser and even equatorial mount. But note that this signal level is different
from TTL signal level used in EQMOD. If you want to connect your camera to equatorial mount through
EQMOD, A signal level convertor between TTL and RS232 is needed.
After you finished installing the drivers, the serial ports drivers should also be installed. You can check its
COM number in the device manager in the Windows so that you can use it in your application software.
Serial port cable is optional accessory, and QHYCCD is developing many types of serial port cable. You
can contact QHYCCD to know if there's serial port cable you need.
The pin arrangement is already shown in the picture above.
Trigger ports
There are a trigger-in port (left) and trigger-out port (right). Trigger-in port is a pulse input port. The camera
does not start exposure until it receives a pulse from its trigger-in port. Trigger-out port output a indicative
signal during the exposure cycle. These two ports use optocoupler. If you want to use these two ports, you
can consult QHYCCD for detail method for electric connection.
Grounding port
Keep the camera in good contact with the earth is the premise that the entire shooting system can work
safely and properly. So QHY90A provides a grounding port. This port is connected to the GND on the PCB
in the camera, and the GND is also the cathode of the 12V power supply. The grounding wire is included in
the package, you can use it to connect the camera to other equipment (Metal case of the equatorial mount
or metal case of PC) so that they have common ground. If you have no experience about it, please consult
professional electrician.