Today I checked all the CCD cables which is connected output channels of the VIDEOMUX.
Among total 22 cables for output, 18 cables are type of RG59, 4 cables are type of RG58.
The reason I am checking the cables is for replacing the cables with impedance of 50 or 52 ohm by those with impedance of 75 ohm.
After I figures out which cable has not proper impedance, I will make new cables and substitute them in order to match the impedance, which would lead to better VIDEO signal.
Today, I labeled all cables connected to output channels of VIDEO MUX and disconnect all of them since last time it was hard to check every cable because of cables too entangled.
With thankful help by Yuta, I also checked which output channel is sending signal to which monitor while I was disconnecting cables.
Then I checked the types of all cables and existing label which might designate where each cable is connected to.
After I finished the check, I reconnected all cables into the output channel which each of cable was connected to before I disconnected.
4 cables out of 22 are type of RG58 so expected to be replace with cable of type RG59.
The result of observation is as follows.
Ch#
|
where its signal is sent |
type |
| 1 |
unknown |
59 |
| 2 |
Monitor#2 |
58 |
| 3 |
Monitor#3 |
59 |
| 4 |
Monitor#4 |
59 |
| 5 |
Monitor#5 |
58 |
| 6 |
Monitor#6 |
59 |
| 7 |
Monitor#7 |
58 |
| 8 |
unknown / labeled as "PSL output monitor" |
59 |
| 9 |
Monitor#9 |
59 |
| 10 |
Monitor#10 |
59 |
| 11 |
Monitor#11 |
59 |
| 12 |
Monitor#12 |
59 |
| 13 |
Unknown |
59 |
| 14 |
Monitor#14 |
59 |
| 15 |
Monitor#15 |
59 |
| 16 |
unknown / labeled as "10" |
59 |
| 17 |
unknown |
59 |
| 18 |
unknown / labeled as "3B" |
59 |
| 19 |
unknown / labeled as "MON6 IR19" |
58 |
| 20 |
unknown |
59 |
| 21 |
unknown |
59 |
| 22 |
unknown |
59 |
|
I could not figure out where 10 cables are sending their signals to. They are not connected to monitor turned on in control room
so I guess they are connected to monitors located inside the lab. I will check these unknown cables when I check the unknown input cables.
Next time, I will check out cables which is connected to input channels of VIDEIO MUX. Any suggestion would be really appreciated. |