Comtech EF Data CDM-625, Инструкция по установке и эксплуатации

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CDM-625 Advanced Satellite Modem Revision 1
Front Panel Operation MN-0000036 (Ref MN/CDM625.IOM)
If
RxEnable
is selected as the mode the CDM-625 will
generate
a timing signal of the type
selected here.
Note:
For a particular link, the two interface types need not be the same.
For example:
If it is
required to generate an E1 reference signal at the remote site, but at the local end only a T1
reference signal is available, this is supported.
5.4.5.4 CONFIG: Clocks
Æ
Ext Freq Ref
Frequency Reference: Internal
(Internal(with O/P),1,2,5,10MHz) (
v
)
There are two internal reference modes –
Internal
and
Internal (with Output).
Edit the selection
using the
▲ ▼
arrow keys, then press
ENTER
.
In the
Internal (with Output)
mode, the internal reference is used as an output on the rear panel
Ext Ref In/Out
BNC connector. When this mode is selected, an amber LED adjacent to the
connector illuminates to alert the user that the connector, normally used as as input, now has an
output signal present. This mode is useful if a user wishes to use a single frequency reference for
both the modem and another piece of equipment in the system.
5.4.5.5 CONFIG: Clocks
Æ
Internal Reference
Internal Hi-Stability 10MHz Reference
Fine Adjust: +048 (+/-999) (
34v
)
With the Internal 10 MHz Reference selected, very fine adjustment of the Internal 10MHz
Reference may be made. The adjustment value is retained in EEPROM memory, and hence is not
lost when the NVram memory is cleared.
Note:
changes made to the adjust value are implemented
immediately
, not after the
ENTER
key
is pressed.
Select the digit to be edited using the
◄ ►
arrow keys. Edit the value of the digit using the
▲ ▼
arrow keys, then press
ENTER
.
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