Interface a camera to nNovia QC120 A2D2 recorder
This wiki describes a circuit that I decided was necessary to be able to neatly interface the nNovia QC120 A2D2 recorder to a Sony DXC-325P camera with CA-325P studio back.
This interface deals with translating VTR start/stop signals from the camera into GPI signals to pause and resume the recorder when it is in record mode.
There is also the possibility of getting it to communicate with the nNovia RS-422 port and using this protocol to control the device.
In addition to the device control, there will also be XLR Balanced line input to be converted to unbalanced line level.
<A HREF="%ATTACHURLPATH%/Camera-A2D.jpg"> <img alt="Schematic" src="/twiki/pub/Custard/CameraA2DInterface/Camera-A2D_t.jpg" /> </A>
I'm still working on the final design. I have built the PIC 16f872 based circuit that controlls the nNovia via the GPI control lines and this seems to work very well.
The next step with the PIC interface is to try controlling the RS232 port on the nNovia to start and stop the deck and get its status.
I will be prototyping the Preamp shortly. I have a plan to use the A2D interfaces on the PIC to drive an LED PPM or VU meter on the front panel of the case.
- CameraA2d.sch: Cadsoft EAGLE Schematic
- main.asm: Camera-A2D MPASM Source
Attachment of nNovia and the Interface to the camera.
<A HREF="%ATTACHURLPATH%/DSC_1210.JPG"> <img alt="nNovia and Interface attached to camera" src="/twiki/pub/Custard/CameraA2DInterface/DSC_1210_thn.JPG" /> </A> <A HREF="%ATTACHURLPATH%/DSC_1211.JPG"> <img alt="Interface with cover removed" src="/twiki/pub/Custard/CameraA2DInterface/DSC_1211_thn.JPG" /> </A>
Unofficial Sony DXC-325P and CA-325 Manual
This is a collection of information that I have gathered from experience with using the Sony DXC-325P Camera and information on the CA-325 Camera adapter.
CA-325 Camera adapter
14 Pin connector pinout.
- 1 - CCU
- 2 - VTR
- 3 - VTR
- 4 - VTR
|*3*||Mic out (x)||Intercom out (x)||-60dbs / -20dbs 600R|
|*4*||Mic out (y)||Intercom out(y)||-60dbs / -20dbs 600R|
|*5*||Mic gnd||Intercom gnd|
|*6*||Composite Video out / Y out *(1)||Composite Video out||
1V p-p 75R
|*7*||Composite Video gnd||Composite Video gnd|
|*8*||Return Video gnd||Return Video gnd|
|*9*||Return Video in||Return Video in||1V p-p 75R|
|10||Battery Alarm in||Serial I/O|
|11||Chroma out *(1)||Red out||0.7V p-p 75R|
|12||Rec/Alarm in *(2)||Green out||*(2) / 0.7V p-p 75R|
|13||VTR 5V open, 0v closed.||Tally in|
|14||Power Save out / Audio Monitor in||Blue out|| ? / 0.7V
- 1 - VBS/YC Switch
- 2 - 0v - VTR Off, 2.5v - VTR Standby, 5V - VTR Rec, 2.5v-5v 1Hz - VTR Alarm
- DS485N RS422/485 Transceiver, 8 DIP http://microcontrollershop.com/product_info.php?cPath=114&products_id=1047
- VU Meter circuit. http://forum.sparkfun.com/viewtopic.php?t=10952&sid=ef28b0ba13b40776002e5a8fad28f9e9
- Jensen Transformers JT-11P-1 Balanced line input. http://www.jensen-transformers.com/datashts/11p1.pdf
-- Main.BruceJames - 06 Sep 2007