SCHOEPS PHS 48 - Handbuch (Seite 3)

Phantom Power Tester
PHS 48
The PHS 48 can be plugged into a micro-
phone input or cable that carries 48 Volt
phantom power, to verify that sufficient cur-
rent is available to power a SCHOEPS micro-
phone. According to the standards (DIN EN
61938, formerly IEC 268-15 and DIN 45 596),
a 48 V phantom powered microphone may
draw a current of up to 10 mA per channel.
SCHOEPS CMC 5, CMC 6 and CCM micro-
phones actually need only 4 mA (ca. 5 mA if
Active Accessories are used), so the PHS 48
tests for approximately this amount of avail-
able current at the required voltage level.
The PHS 48 does not test whether the two
feed resistors in the supply are sufficiently
well matched to one another. If they are not
well matched, any interference picked up in
the cable could cause an increased noise level.
Instructions for use:
Any trim, gain, or volume controls should
first be set to their minimum position, to
avoid noise and potential damage to head-
phones, loudspeakers and/or human hearing.
Then, while all other microphones are already
connected, attach the PHS 48 to the socket
which is intended to power the SCHOEPS
microphone. If the result is positive, the green
LED in the PHS 48 will light and remain lit.
In equipment with multiple inputs for micro-
phones, the necessary current should be avail-
able from any and all inputs that might be
used simultaneously.
Connector: XLR-3M
Dimensions: length: 53 mm
diameter: 19 mm
Surface finish: nickel
SCHOEPS GmbH · Spitalstr. 20 · D-76227 Karlsruhe (Durlach) · Tel: +49 721 943 20-0 · Fax: +49 721 943 2050
www.schoeps.de · [email protected]
3
English
+ phase
- phase
2 (4)
3 (5)
microphone
1
screen
cable
powering
R
S
U
S
input
R
S
P48: U
S
= 48 V ± 4 V; R
S
= 6,8 kW*, I
max.
= 10 mA
I /2
I /2
I
XLR-3
connector
* maximum difference between the resistors:
less than 0.4% (i.e. 27 Ohms for 6.8 kOhms)
Phantom power circuit shown with a transformer-equipped input as an example
*
*
shield