Table of Contents
Advertisement
Operation
TX Power Level
Scrambler
Diff. Encoder
Carrier Mode
3–10
Programs the modulator output power level from -5 to -30 dBm, in 0.1 dBm
steps. The high power option operates from + 5 to -20 dBm.
On entry, the current transmitter power level is displayed with the flashing
cursor on the first character. Press [
output power level in 0.1 dB steps. Press [ENTER] to execute the change.
Note: The actual front panel display may be changed in the Power Offset
Utility function (Section 3.2.1.6.1). Using this function does not change the
actual output power level. When the offset feature is being used, (ADJ) will
be displayed on line 2.
Programs the scrambler ON or OFF.
On entry, the current status of the V.35 Scrambler is displayed. Press [
[
] to select ON or OFF. Press [ENTER] to execute the change.
↓
Programs the differential encoder ON or OFF.
On entry, the current status of the Differential Encoder is displayed. Press
[
] or [
] to select ON or OFF. Press [ENTER] to execute the change.
↑
↓
Programs the modem for continuous wave mode. Four modes of
operation are available: Normal (OFF), Center, Dual, and Offset modes.
The Carrier mode is normally in the OFF position.
To change to Center, Dual, or Offset mode, enter the Carrier Mode Menu
and select the desired test mode.
Center Mode: A test mode that generates a carrier at the current
modulator frequency. This can be used to measure the output
frequency.
Dual Mode: A test mode that generates a dual side-band
suppressed carrier signal. Side-bands are one-half the symbol rate
from the carrier. This is used to check the channel balance and
carrier null.
Offset Mode: A test mode that generates a single upper side-band
suppressed carrier signal. The upper side-band is one-quarter the
symbol rate from the carrier. This is used to check the quadrature.
On entry, the "CENTER" mode is displayed. To activate this test mode,
press [ENTER]. Press [
] or [
↑
To return to the "CONFIGURATION" menu, press [CLEAR].
Note: When [CLEAR] is pressed, the modem is configured to the state it
was in before "CW Mode" was invoked. The transmitter is automatically
turned off to prevent the possible swamping of other channels. To turn
the transmitter on, use the "IF Output" function.
SDM-100A Satellite Modem
] or [
] to increase or decrease the
↑
↓
] to select the "DUAL" or "OFFSET" mode.
↓
] or
↑
Rev. 0
Advertisement
Table of Contents
