Tascam MMP-16 User Manual download pdf (Page 27)

22 Tascam MMP-16 User’s Guide • Chapter 2 • Installation MMP-16

Audio Connections

All audio outputs (both analog and digital) of the MMP-16 use DB-25 connectors. The pin configuration

used on the DB-25 analog audio connectors is identical to that used for Tascam DTRS format digital tape

machines such as the DA-88. Two female DB-25 connectors are used for the analog connections, one for

channel 1-8 and the other for channels 9-16, as labeled on the MMP back panel. Each of the digital

outputs uses a female DB-25 connector to carry eight channels of AES/EBU digital output signals (two

sets of four stereo pairs). These are labeled as digital outputs 1-8 and 9-16.

Analog Output Connections

All analog outputs use balanced signals designed to mate with standard 600-ohm devices using +4 dBu

levels. Analog audio processing is done on two separate 20-bit Digital to Analog converter cards mounted

within the MMP-16. These converters are mounted in a special shielded cage within the MMP and are

attached via ribbon cable to a card (labeled AO) plugged into one of the system ISA bus slots on the PC

motherboard. These D/A boards have their own power supply separate from the main PC power supply.

Max load is 12.28 VRMS.

Digital Output Connections

Two female DB-25 connectors are used to provide four stereo digital outputs each, for a total of sixteen

channels of digital audio output. Two Tascam DA-88 analog I/O cables should be used as digital output

cables. Even though the MMP-16 has no audio inputs, the digital input 1&2 pair on the first digital input

cable is the default reference input for the AES/EBU clock reference. This can be changed to use digital

input 3, 5, or 7 from one of the other three digital input pairs using Setup Menu 600 (Dig In Ref Track).

NOTE: The digital clock signals coming from any external device connected to the AES/EBU inputs will

force the MMP-16’s internal clock to try to lock to it when digital input is selected (Setup Menu 500).

This can cause playback problems if the clock source is not accurate. If this occurs set that track to use the

sample rate converter in Setup Menu 500 (Input Source).

Monitoring Connections

For monitoring at the MMP-16 there is a mono headphone jack on the front panel (compatible with stereo

headphones of either low or high impedance). For studio Cue or remote monitoring there is a rear panel

line level mono mini phone jack. It is an unbalanced output designed to be connected to external

amplification.

The front panel headphone monitor jack is controlled by the LEVEL control located next to the jack on

the front panel. Press the MON key and select the desired tracks using the Track Select keys to choose

which of the MMP-16 tracks will be summed to appear at the headphone jack output. The rear panel jack

is a pre-LEVEL control, so it is a fixed line level output (-10 dBu), and it always presents a summed

output of the audio channels selected using the MON function on the front panel.

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Tascam MMP-16 User Manual Page 27