Comtech EF Data CDM-425, Инструкция по установке и эксплуатации

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CDM-425 Advanced Satellite Modem
Revision 0
Front Panel Operation 6–46 MN-CDM-425
6.2.1.10.2 CONFIG: Misc

RTS
This menu is functional only when the Data Interface is set for RS-422 or V.35.
RTS/CTS operation: (3 options)
Loop, RTS controls Tx-out (

)
Use the
▲▼ arrow keys to set the RTS/CTS control. Press
ENTER . Valid selections are:
Setting Function
RTS/CTS Loop, No Action
RTS and CTS are looped so that CTS echoes the state of RTS, but RTS does
not control the ON/OFF state of the carrier.
Loop, RTS controls Tx out
RTS and CTS are looped so that CTS echoes the state of RTS, and RTS
controls the ON/OFF state of the carrier (i.e., the modem will not bring up its
TX carrier until RTS is asserted).
RxEnable RTS is ignored and CTS is asserted unconditionally.
6.2.1.10.3 CONFIG: Misc

Warm-Up
High-Stab Reference Warm-Up Delay:
Enabled (None,Enable) (

)
The High-Stability Reference Module contains an oven for its crystal. During the short time it
takes for the oven and crystal to come up to temperature, frequency accuracy is not guaranteed.
Use this menu to select a Warm-up Delay that executes upon power-up. This delay is calculated
by the modem and is based on temperature and the amount of time the unit was turned off. This
is much more important at L-Band (950-2250 MHz) than at 50-180 MHz, where the 10 MHz
reference may also be used for RF conversion equipment.
Once this feature is enabled and the modem is powered up, a Warm-Up Delay Countdown is
activated during which time the Tx is suppressed. This countdown displays in decremented
fashion as shown in this example:
Comtech CDM-425 Advanced Satellite Modem
High-Stability Ref warming up: 045 sec
Press the CLEAR key to bypass this warm-up period as needed.