JVC GY-HD250U GY-HD250 Studio Reference Manual v1.12 (Oct. 2008) (66 pages, 18 - Page 55

Interfacing RM-HP250AU with common Intercom system - specs

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Page 55 highlights

Version 1.12  Interfacing RM-HP250AU with common Intercom system The RM-HP250AU can be connected either a two wire balanced or two wire unbalanced intercom system. The table below lists common intercom systems, audio type (balanced or unbalanced), system impedance and manufacture. Intercom System RTSTM Clear-Com Audiocom® Audio type Unbalanced Unbalanced Balanced Termination Spec 200Ω 200Ω 300Ω Manufacturer Telex Communications, Inc. Clear-Com Intercom Systems Telex Communications, Inc. The RM-HP250AU has three terminals that are used to interface with balanced and unbalanced two wire audio intercom systems. These terminals are labeled G (ground) C (cold) H (hot). RM-HP250AU REAR PANEL The table below shows the signals carried on the 3 pin XLR microphone cables used by the most common intercom system providers. Pin # RTSTM Clear-Com Audiocom® Pin-1 Pin-2 GND CH1 Unbalanced Audio + DC Power (+30V) GND DC Power (+30V) GND Balanced Audio(C) + DC Power 12 3 Pin-3 CH2 Unbalanced Audio Unbalanced Audio Balanced Audio(H) + DC Power XLR-3pin Male (on Cable) 54

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Version 1.12
The RM-HP250AU can be connected either a two wire balanced or two wire unbalanced intercom system. The table below
lists common intercom systems, audio type (balanced or unbalanced), system impedance and manufacture.
Intercom System
Audio type
Termination Spec
Manufacturer
RTS
TM
Unbalanced
200Ω
Telex Communications, Inc.
Clear-Com
Unbalanced
200Ω
Clear-Com Intercom Systems
Audiocom®
Balanced
300Ω
Telex Communications, Inc.
The RM-HP250AU has three terminals that are used to interface with balanced and unbalanced two wire audio intercom
systems. These terminals are labeled G (ground) C (cold) H (hot).
RM-HP250AU REAR PANEL
The table below shows the signals carried on the 3 pin XLR microphone cables used by the most common intercom system
providers.
Pin #
RTS
TM
Clear-Com
Audiocom®
Pin-1
GND
GND
GND
Pin-2
CH1 Unbalanced Audio
+ DC Power (+30V)
DC Power (+30V)
Balanced Audio(C)
+ DC Power
Pin-3
CH2 Unbalanced Audio
Unbalanced Audio
Balanced Audio(H)
+ DC Power
3
2
1
XLR-3pin Male
(on Cable)
Interfacing RM-HP250AU with common Intercom system
54