Comtech EF Data SDM-650B Especificaciones descargar pdf (Pagina 428)

100

101

SDM-300Ls Satellite Modem Revision 0

Burst Mode Modulator Operation Addendum A

B–4

B.2.7 Transmit Frequency Change Time

The time between the end of a remote command and the end of the modem reply for

frequency change and synthesizer lock will be < 200 mS.

B.2.8 Phase Noise

1. The phase noise of the transmit IF output carrier is no worse than:

dBc/Hz Distance from Carrier

-66.0 100 Hz

-76.0 1 kHz

-86.0 10 kHz

-96.0 100 kHz

-96.0 1 MHz

2. Fundamental AC line spurious is -42 dBc or lower.

3. The sum of all the single sideband spurious, from 0 to 0.75 x symbol rate, is

-42 dBc or lower.

B.2.9 Transmit IF Output Switch

When set to off, no signal present at the output is greater than -60 dBm, measured in a

3 kHz bandwidth from 0 to 500 MHz.

B.2.10 Transmit IF Power

The TX-IF power is operator selectable from -5 to -30 dBm, in 0.1 dB steps, with an

accuracy of ± 0.5 dB. The maximum drift due to temperature change over the specified

range is ± 0.5 dB.

As an option the output can be selectable from +5 to -20 dBm, in 0.1 dB steps, with an

accuracy of ± 0.5 dB. The maximum drift due to temperature change over the specified

range is ± 0.5 dB.

B.2.11 Modulator Power Offset

An offset to the displayed IF output power may be entered from -99.0 to +99.0 dB, in

0.1 dB steps.

1 2 ... 423 424 425 426 427 428 429 430 431 432 433 434

Comentarios a estos manuales

Sin comentarios

Comtech EF Data SDM-650B Especificaciones Pagina 428

Comentarios a estos manuales

Relacionado con productos y manuales para Redes Comtech EF Data SDM-650B