Ch07_technical_specifications.pdf, Chapter 7. technical specifications – Comtech EF Data DM240XR User Manual
Page 85
MN-DM240XR– Revision 13
7–1
Chapter 7. Technical Specifications
7.1
Introduction
This section defines the technical performance parameters and specifications for the
DM240XR Digital Modulator.
7.2
IF Specification
Tx IF:
50 to 90 MHz, 100 to 180 MHz (70/140 MHz),
950 to 2050 MHz (L-Band)
IF Step Size:
1 Hz
Frequency Stability:
1 ppm
Power Output:
0 to -25 dBm
Power Output Accuracy:
± 1.0 dB
Power Output Stability:
± 0.5 dB
Carrier Mute:
-55 dB
Spurious Emissions:
-55 dBc, 50 to 90 and 100 to 180 MHz (70/140 MHz),
950 to 2050 MHz (L-Band)-45 dBc, all other
frequencies
Output Impedance:
50 Ohm (L-Band), 75 Ohm (70/140 MHz)
Return Loss:
20 dB (70/140 MHz), 14 dB (L-Band)
Phase Noise:
1 kHz -73 dBc10 kHz -86 dBc100 kHz -100 dBc1 MHz
-120 dBc
Output Connector:
BNC Female (70/140 MHz), SMA Female (L-Band)
Monitor Port Output Connector:
SMA Female (Based on output frequency)
External Reference:
1 to 10 MHz in 8 kHz steps, better than 10 ppm
1.5 to 5 Vp-p, 50 Ohms