The CDM-710 Broadcast Satellite Modem is intended for operation in Digital Video Broadcast (DVB) and
generic data transmission applications. It operates over satellite links and provides programmable symbol /
data rates up to 45 Msps in DVB-S21, DVB-S and DVB-DSNG modes.
The modulation types supported include QPSK, 8-PSK, 16-QAM, 16-APSK and 32-APSK. Constant Coding
and Modulation (CCM) operation with a single input stream is provided for DVB-S2 operation. The unit is
available in modulator only, demodulator only, and modem configurations.
The terrestrial data interfaces are field-removable to allow swap out of interface types. The data interfaces
include the CDI-40 with ASI, CDI-70 Gigabit Ethernet and CDI-60 HSSI.
DVB-S2 offers new opportunities for broadcast applications. With a broad
range of modulation and coding formats, it permits the user to tailor a link for
the available bandwidth and power to optimize link performance. Whether a link
is for Direct-to-Home (DTH) or Digital Satellite News Gathering (DSNG),
contribution or distribution, there is a format available to suit each application.
With an ASI interface and either a 70/140 MHz or L-Band IF, the CDM-710 is equipped with the
configurations most frequently requested by users. This is ideal for video or data transmission formats that
take advantage of the frame structures developed for digital video applications. With the Gigabit Ethernet,
new opportunities are opened.
Enhancing the CDM-710’s performance is easy. Additional features are added quickly on site, using FAST access codes purchased from
Comtech EF Data. To enable these features, simply enter the code at the front panel. Other features are added with a simple module
The operator may configure and monitor the modem from the front panel, or through the remote M&C port. Control and status is provided
through the RS-232, RS-485 (2/4 wire) port or 10/100Base-T Ethernet port.
70 / 140 MHz
Impedance / Connector
52 to 88 and 104 to 176 MHz in 100 Hz steps
50 ohm or 75 ohm, BNC Female
0 to -20 dBm, 0.1 dB steps (70/140 MHz)
±0.5 dB of nominal at 25°C. Within ±0.5 dB of 25°C
value over frequency and temperature range
Impedance / Connector
950-2000 MHz in 100 Hz steps, modulator
50 ohm, Type N Female
-5 to -25 dBm, 0.1 dB steps
±0.5 dB of nominal at 25°C
±0.5 dB from 25°C value at same frequency
Harmonics and Spurs
< 55 dBc/4kHz, modulated carrier
Excludes spectral mask area