Marshall V-R70P-HDSDI to HPX170 powering connection?

[andersonnd]

I figure the 35mm crowd uses this gear all the time so I'd better ask in this section first:

I want to power the Marshall by HPX via XLR cable, but Marshall is 4-pin male and HPX is 3-pin female. What is the easiest solution here? Am I on the wrong track altogether? :huh:

 

[disjecta]

You are on the wrong track. This unit cannot be powered using your XLR connection. I had the same issue with this a while back and I called them to confirm. You'll just need to resort to using a separate battery.

 

[andersonnd]

Okay, thanks for clearing that up. I was starting to suspect that to be the case, but our ever resourceful community never ceases to find ways to make life easier - even when it's telling me I'm on the wrong track

 

[mikkowilson]

XLR cables can be used for many things.

The most common varient is the 3-pin XLR connector. Common uses include:
Analog audio (Mic & Line Level)
Digital AES/EBU audio
Timecode
Com (ClearCom,Telex,RTS,etc..)
Other miscalanious signalling
some DMX lighting control systems
Pyrotechnics
Etc..

4-pin XLR
is normally used for power. 12v in many applications, including broadcast/video. but 24v in some film applications.
It's also used for some Com headsets

5-pin XLR
is the normaly connector for DMX lighting control.
It's also sometimes found on stereo microphones.
And on some Com headsets (Normally on Triax based cameras)

6-pin XLR
pretty rare. Sometimes used on dual-channel ClearCom style Com systems.
Also sometimes used for stereo analog audio

2-pin XLR
also sometimes used for power. For example for console lights on some mixing desks.



BNC (for example) also has similar poliferation. Common uses include:
Analog Composite video
Y/C Video
Analog Componenet video
SDI
HD-SDI
Dual Link HD-SDI (etc..)
Timecode
Genlock (really just a video signal)
AES/EBU Audio
Power
Complex type multiplex applications

RCA (for another example) is also used for many signal types..
Analog Composite Video
Analog Component Video
Analog audio (Mono, stereo, surround)
Speaker interconnections
Digital ("coaxial") audio.




A connector is just a connector. Alone they don't define the signal they carry. Always read the spec of the gear you are using to learn what signal each connector is passing.


In your case, the 3-pin XLRs on the -170 are analog audio inputs to the camera (selectabel between Mic & Line level using a switch on the camera).

The 4-pin "power" connector on the the monitor needs a regular 12v power source with an XLR-4 cables. You could take this from any 12v battery (a broadcast [IDX, Anton Bauer, PAG...] battery, a stack of AAs, a car battery...) or decent 12v power supply.

- Mikko