evertz 7700 Manual page 11

HD OUTPUT: Reclocked, level-restored, loop-back output BNC connector for serial digital video signals
compatible with HD-SDI (SMPTE 292M), SD-SDI (SMPTE 259M-C), SDTi (SMPTE
305.2M), or DVB-ASI (EN 500083-9) standards. See section 3.2 for video output
specifications.
AES IN: AES audio input connections of the removable terminal block. The 7707MT-HD
accommodates four AES audio channels, designated as A1, A2, A3, and A4. Each of these
four channels has a positive and negative terminal associated with it, and is able to accept
balanced or unbalanced AES without card configuration. Balanced and unbalanced audio
signals are connected as follows:
Balanced - Connect positive and negative audio signals to the corresponding positive and
negative terminals of the 7707MT-HD. This connection arrangement yields a nominal 110Ω
input impedance for balanced audio signals.
Unbalanced - Connect unbalanced audio signals to the positive input terminal of the
7707MT-HD. Leave the negative input terminal unconnected. This connection arrangement
yields a nominal 75Ω input impedance for unbalanced audio signals.
See section 3.3 for AES audio input specifications.
SERIAL IN: Bi-directional serial data connections of the removable terminal block. The 7707MT-HD
accommodates one channel of RS-422, RS-232, or RS-485 serial data. Data input
connections are labeled DI, while data output connections are labeled DO. The card must
be configured for use with the RS-422, RS-232, or RS-485, as described in section 3.4.
Serial data connections are assigned per the data type selected. RS-422 and RS-232
signals are connected as follows:
RS-422 - Connect positive and negative RS-422 input and output signals to the
corresponding positive and negative terminals of the 7707MT-HD. Bi-directional data will
be communicated to and from the companion 7707MR-HD.
RS-232 - Connect each RS-232 input data signal to the positive or negative DI terminal of
the 7707MT-HD. The companion 7707MR-HD will output each signal on the corresponding
positive or negative DO terminal. Likewise, serial data signals applied to the companion
7707MR-HD will be output from the 7707MT-HD.
RS-485 - Operation with RS-485 requires that DI and DO terminals be connected together.
The DI+ terminal should be connected to the DO+ terminal, and the DI- terminal should be
connected to the DO- terminal. Connect positive and negative RS-485 signals to the
corresponding positive and negative terminals of the 7707MT-HD.
See section 3.4 for serial data specifications.
See section 4.2.10 to 4.2.15 for serial data configuration instructions.
GPIO: General Purpose Input and Output connections of the removable terminal block. The
General Purpose Output is a normally-open dry-contact relay closure. The General Purpose
Input is an active-low, opto-isolated connection.
See section 3.5 for GPIO specifications.
7707MT-HD Multi-Signal HD/SD, AES, and Control Fiber Transmitter
Version 1.5
7700 Multi-Frame Manual
Page-5