| INPUTS:
|
| Switchable
between two XLR-3F sockets and a special 5-pin Binder input for
the Schoeps KCY active "Y" cable. XLR inputs are balanced
and transformerless; the 48-Volt phantom powering can be switched
off (for subsequent post-production M-S dematrixing). |
| Input impedance:
|
20 kOhm
|
| Recommended
minimum sensitivity of microphones at XLR inputs: |
8 mV/Pa
|
| Maximum
input level (20 dB gain setting) for < 0.5% THD: |
-2.2 dBV
(780 mV rms) |
| Preamplifier
gain settings: |
4, 10,
20, 30 or 40 dB |
| Performance
specifications of VMS 5 U with Schoeps CMC 64 (cardioid):
|
| Equivalent
noise level: |
17 dB (A-weighted),
27 dB (CCIR, qps) |
Maximum
sound pressure level:
at 4 or 10 dB gain:
at 20 dB gain:
at 30 dB gain:
at 40 dB gain: |
132
dB, limited by microphone
130 dB
120 dB
109 dB |
| Peak level
indicators: |
-20 dB,
-3 dB |
| The "Balance"
potentiometer permits compensation for differences in microphone
sensitivity. A polarity inversion switch permits the rapid exchange
of L-R channel assignments in M-S recording. |
|
OUTPUTS: |
| The outputs
are balanced and transformerless, and are switchable between the
amplified microphone signals and the decoded M-S stereo signals.
|
| Output impedance:
|
100 Ohms
|
| Maximum
output level for 0.5% THD: |
17 dBV
(7 Vrms) |
| Recommended
load impedance: |
2 kOhm
or greater |
|
HEADPHONE OUTPUT: |
| Switchable;
for monitoring either the amplified microphone signals ("PREAMP"
= left/right for A/B or X/Y recordings) or ("MATRIX" = mid/side
decoding for M-S stereo inputs). |
| Headphone
impedance: |
32 - 2,000
Ohms |
| Headphone
socket: |
1/4" stereo
phone jack |
|
FILTERS: |
| An infrasonic
filter (20 Hz, 18 dB/oct.) is permanently active. In addition, a
low-frequency rolloff (150 Hz, 6 dB/oct.) can be switched in.
|
|
POWERING: |
| An internal
filter/regulator circuit permits a wide range of input voltages.
|
|
OPERATION WITH INTERNAL BATTERIES (including rechargeable types):
|
| Number and
type of cells: |
6x AA
|
| Recommended
battery type: |
Alkaline
|
| Recommended
rechargeable type: |
NiMH
|
| A user-replaceable
fuse protects against accidentally reversing the polarity of the
batteries. |
| Battery
life with alkaline cells: |
ca. 8.5
hours |
| Battery
life with rechargeable batteries: |
ca. 3
hours (700 mAh NiCd);
ca. 5.5 hours (1300 mAh NiMH) |
| A voltage
indicator displays the battery voltage during operation. A warning
LED will begin to blink if the voltage falls below a critical value
(time remaining at that point: at least 10 minutes with rechargeable
batteries). The unit will shut itself off automatically to help
prevent damage resulting from completely draining the batteries.
With rechargeable batteries, this reduces the risk of any individual
cells inverting their polarity. The unit can be brought back into
operation by turning the "Power" switch off and on again.
|
|
EXTERNAL POWERING: |
| Coaxial
socket, 5.5 mm x 2.1 mm |
| Reverse
polarity will not damage the unit, athough it will not operate.
If external powering is present, the batteries are automatically
disconnected (indicated by yellow LED "EXT."). This protects the
batteries from being drained or loaded unintentionally. The battery
voltage indicator displays the level of any external powering.
|
| The unit
can be operated with an unfiltered DC voltage from 6 V (500 mA)
up to 15 V (250 mA) at the external supply input socket or 10-13
VAC. |
|
PARALLEL OPERATION: |
| Parallel
operation for a VMS 5 U from a single power supply, along with one
or more other pieces of equipment, is generally possible because
of the internal galvanic isolation by the regulator.
The design of the rear panel is deliberately labeled "upside down"
to allow the unit to be connected or disconnected without turning
it around while in use. |
| Robust,
black metal case; designed for portable use. |
| Dimensions:
|
W x H x
D: 169 mm x 60 mm x 172 mm
(approximately 6-5/8" x 2-3/8" x 6-3/4") |
| Weight:
|
1.2 kg (approximately
2 lb 10 oz) |
