Townshend Computer Tools DAT-Link - 11.3 Hardware; 11.3.1 Ariel Corps ProPort

11.3 Hardware 105
11.3 Hardware
The DAT-Link + can be used with external hardware connected via its DSP-Port
as described in Section C.1. This includes most hardware that is designed to work
with the NeXT DSP-Port or with the DSP-Port found on Ariel Corp's digital signal
processing b oards. For most external hardware, the user must provide their own
DSP32C programs that are able to communicate with the equipment. The DAT-
Link + do es, however, include support for two specic devices: Ariel's ProPort
Model 656, and TEAC's line of multichannel data DAT recorders.
11.3.1 Ariel Corp's ProPort
The DAT-Link + can b e used with Ariel's ProPort Model 656 to provide A/D and
D/A conversion without using a DAT machine. The ProPort features:
 Two input channels with 16-bit oversampling sigma-delta analog to digital
conversion and tracking digital anti-aliasing lters.
 Two output channels with 8x oversampling, 20-bit digital to analog conversion.
 Two AC-coupled, balanced, dierential microphone inputs on professional
XLR connectors.
 Switchable 28-volt phantom microphone p ower.
 TwoAC-coupled
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balanced dierential line-level inputs on 3-conductor phone
jacks.
 Front panel gain with 40 dB range on b oth input channels.
 Presence of signal and overload LED indicators for b oth input channels.
 Seven selectable sample rates.
 Two active-balanced, line-level, analog outputs on 3-conductor phone jacks.
To use the ProPort with DAT-Link +, follow these steps:
1. Set the ProPort's Data Format switch to the A position.
2. Set the ProPort's rotary sampling rate switchto Auto 1 .
3. Connect the ProPort to DAT-Link +'s DSP-Port using the cable provided
with the ProPort.
4. Run:
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The Ariel manual says they are DC-coupled but they don't appear to really b e.