Comtech EF Data CDM-570A - Manual (Page 108)

CDM-570A/570AL Satellite Modem with Optional Packet Processor MN-CDM570A
Front Panel Operation Revision 2
6–4
6.1.3.1 Screen Saver
----------- Unit Label --
any key.... Demod not lock
If you were to leave the operating unit displaying the same screen for weeks at a time, the VFD
could become ‘burnt’ with this image. To prevent such burn-in, a screen saver feature activates
after 1 hour. The screen saver message scrolls from right to left across the screen, and then
wraps around. The user-configurable unit label, or Circuit ID, displays on the VFD top line, while
the bottom line displays the demod lock state (i.e., ‘ Demod not locked’ or the circuit E
b
/N
0
value if the demod is locked) and the prompt ‘ Press any key...’ Press any key to return
to the previous screen.
6.1.3.2 Opening Screen
The opening screen displays once you first apply power to the modem. Press CLEAR from any
other nested menu until this screen appears. Press any other key to advance to the Select:
(Main) menu screen.
When you disable the Internal Reference warm-up delay feature (see Sect. 6.3.7.3.2), depending
on the modem type, one of the following screens displays:
CDM/R-570AL(L-Band) unit: CDM-570A (70/140 MHz) unit:
If, however, you enable the Internal Reference warm-up delay feature, one of the following
screens displays:
CDM/R-570AL(L-Band) unit: CDM-570A (70/140 MHz) unit:
The bottom line counts down, in seconds, the time remaining for the warm-up period. During
this period, the modem deliberately mutes the Tx Carrier. At the end of the warm-up period,
the bottom line reverts to the ‘normal’ opening screen display (i.e., it displays the modem
Firmware version), and the modem ENTERs into its normal operational state.
X
Bypass (override) the warm-up period at any time by pressing the CLEAR key.
Comtech CDM-570A Modem
Ref Warming-up: 045
Comtech CDM/R-570ALModem
Ref Warming-up: 045
Comtech CDM-570A Modem
Firmware Version #.#.#
Comtech CDM/R-570ALModem
Firmware Version #.#.#