3 – Connections : Analog connections
TASCAM DM-4800
User’s Manual
49
Analog connections
Mic/line connections
All these connections (microphone and line) are bal-
anced. The XLR connections follow the standard of
pin 1 ground, pin 2 hot and pin 3 cold. The TSR 1/4"
jacks are tip hot, sleeve ground, ring cold (this
applies to all balanced 1/4" jacks on the DM-4800).
Both the XLR mic connection and the 1/4" jack con-
nection can be made at one time, but it is only possi-
ble to accept input signals from one source at a time.
The choice between the mic and line inputs is made
with the
MIC/LINE
selector switches for each input
channel.
Note that the switch also has a
–20
position, provid-
ing a 20dB pad for high-output microphones.
The analog input signal level can be adjusted using
the analog
TRIM
controls (there is also an internal
software digital trim control for each input channel,
independent of these analog controls).
A +48V phantom power supply is provided for bal-
anced condenser microphones. This is switchable in
groups of 4 (inputs 1–4, 5–8, 9–12, 13–16, 17–20,
and 21–24).
WARNING
To avoid damage to the microphones and/or the DM-
4800, do not connect or disconnect condenser micro-
phones to and from the DM-4800 with the phantom
power to that input switched on. Always switch the
phantom power off before connecting or disconnecting
condenser microphones.
Do not use unbalanced dynamic microphones con-
nected to the XLR connectors with the phantom power
turned on. This may cause damage to the microphones
and/or the DM-4800.
The 1/4" balanced input jacks 4dBu connec-
tions, but you can use the
TRIM
controls to allow
them to accept –10dBV connections (from synthesiz-
ers, etc.).
Note that if additional analog inputs are required, the
optional IF-AN/DM slot card can be used to provide
such inputs.
TIP
Signal/overload indicators for the input channels are
selectable in the preferences screen. See “OL/STATUS
LED TYPE” on page 42 for full details.
Channel inserts
The analog inserts for each ana-
log input channel allow you to use your favorite ana-
log compressors/gates, etc. before the sound gets
converted to the digital domain.
NOTE
These are
not
the same as the “soft” (assignable) insert
loops which are described in “Insert patching” on
page 61.
These 1/4” jacks are wired: tip send, ring return,
sleeve common ground. The nominal send and return
levels of these inserts is –2dBu which allows them to
be used with a wide range of studio equipment.
2 TR IN
This pair of unbalanced RCA jacks pro-
vides a –10dBV return for the analog outputs of a 2-
track recorder connected to the DM-4800.
ASSIGNABLE RETURNS
These are pseudo-bal-
anced 1/4" TRS jacks at +4 dBu (wired as described
above). As the name suggests, they provide analog
return inputs which can be assigned to a variety of
sources (see “Routing” on page 59).
Figure 3.2: Analog channel inputs and controls
