Tascam TM-D4000 Owner's Manual

Also see for TM-D4000: Operation manual Technical documentation

Contents

13–113 - Rear panel & connectionsThis section describes the rear panel connectors ofthe TM-D4000.All rear panel connections on the TM-D4000 are dig-ital or control connections. The analog connectionsare all provided on the top of the unit, and aredescribed in 12, “Front panel”.13.1Analog inputsThese features (all on the horizontal top panel of theTM-D4000) are provided for input channels 1through 8. Some of these features also apply to thetwo ST IN channels.[47] MIC input (channels 1–8)These XLR-type connectors provide inputs suitablefor balanced microphones, etc. to be connected to theTM-D4000.They are wired as follows: 1=ground, 2=hot, 3=cold.With the PAD [51] off, the nominal input level forthese connectors is –50 dBu. Using the channel’sTRIM control, this can be adjusted between levels of–67 dBu and –20 dBu.With the PAD on, the nominal input level is –20 dBu.The channel’s TRIM control can be used to adjust thevalue between –41 dBu and +6–dBu.The input impedance level is 2.4 kΩ.Phantom power is available for these connectors. It isturned on and off for two blocks of input channels(1–4 and 5–8) using the PHANTOM (+48V) switches[54]. WARNINGConnection of microphone cables and micro-phones: to prevent hazard or damage, ensurethat only microphone cables and micro-phones designed to the IEC 268-15A stan-dard are connected.Connexions des microphones et de leurscâbles: pour éviter tout endommagement,s’assurer de brancher uniquement desmicrophones et des câbles de microphonesconçus selon la norme IEC 268-15A.[48] LINE IN (BAL) input (channels 1–8)These 1/4-inch balanced inputs are used to acceptanalog line-level sources.These are wired: tip=hot, ring=cold, sleeve=ground.The nominal input level is +4 dBu, adjustable usingthe TRIM control from between –39 dBu and +8 dBu.No phantom power is supplied to these connectors.[49] INSERT connector (channels 1–8)These 1/4-inch TRS (tip-ring-sleeve) connectors areused to provide an insert loop for the eight integralanalog inputs.These are wired as follows: tip=send, ring=return,sleeve=common ground.The nominal signal level of both the send and returnis –2 dBu. The impedance of the send is 100 Ω andthat of the return is 10 kΩ.The insert send occurs post-TRIM [52]. The insertreturn is located immediately before the O/Lindicator [53].[50] LINE switch (channels 1–8)When this switch is pressed in, the channel’s input istaken from the 1/4-inch balanced LINE IN (BAL)inputs [48].When this switch is in the out position, the channel’sinput is taken from the XLR-type balanced MIC con-nector [47].[51] PAD switch (channels 1–8)When this switch is pressed in, it provides 20 dB ofattenuation to any signals received at the MIC con-nectors ([47]).This is unconnected with the digital PAD controlprovided as part of the MODULE screens (see 4.8,“Pad and phase(Φ)”).[52] TRIM control (channels 1–8 and STRTN 1 and 2)On the eight input channels and the two stereoinputs, this TRIM control is used to adjust the inputsignal level by a range of 47 dB.When it is turned fully counterclockwise, full trim isapplied. Turning the knob clockwise increases thesignal level fed to the channel’s A/D convertor.[53] O/L indicator (channels 1–8)This red LED lights when the post-TRIM, post-insertreturn signal exceeds –3 dBFS.This LED should light only on the very loudest partof program material, since there is only 3 dB of head-room remaining when it lights.