Chader 3 C o n t r o l B o x 8
R field 2
G field 1
B field 2
This order maintains the field 1, field 2, field 1, field 2 cycle that is defined in
RS170 timing. It avoids the timing problems that arise in using the following:
R field 1
G field 1
B field 1
R field 2
G field 2
B field 2.
However, FS5 can accept either order.
Video input connectors are BNC type. Connectors are labeled ‘RIGHT’ for
right eye input while using stereo mode, and ‘LEFT/MONO’ for left eye in ste-
reo mode, or for both eyes in mono mode. These inputs are 750hm terminated.
3xRS170 RGB Parallel (Intergraph RGB):
3x RS170 RGB
parallel describes yet another related video format. This format
is a 5 wire video (R, G, B, H sync and V sync) which is run at 3x RS170. So
the timing is:
Full frame rate: 90 Hz (3x RS 170)
Full field rate: 180 Hz (3x RS 170)
Color field rate: 18OHz (3x RS170)
line rate: 47,250Hz (262.5 lines x 180 fields)
This format has been created because some computer manufacturers (Intergraph
in particular) can generate video at 3x RS 170, but do not have hardware config-
ured to support putting all three colors on one wire. To accommodate systems
like Intergraph we have developed circuitry to accept 3xRS 170 RGB parallel.
This signal is input on HD15 pin connectors. The FS5 does the work of se-
lecting R, G and B in sequence internally.
The pinout of this connector is given in Appendix 1. Video inputs are 750hm
terminated. Sync inputs are unterminated.
F-Scan Format:
FS5 also accepts a field sequential format that is generated by the F-Scan con-
verter. This format is most similar to the field sequential 3xRS- 170 RGB com-
posite format described above. It differs only in that H sync and V sync are
transmitted on separate wires. The signal is transmitted over a 15 pin to 15 pin
video cable from the F-Scan converter to the FS5.
