![Datum Systems M7 Series Скачать руководство пользователя страница 187](http://html1.mh-extra.com/html/datum-systems/m7-series/m7-series_installation-and-operation-manual_514098187.webp)
M7/M7L/M7LT Modular Satellite Modem
Maintenance
M7/M7L/M7LT - Rev. 0.05
4-17
4.7.3.5.
Why can
’t I find or see a certain option parameter that is shown in the tables?
Many parameters are only available when another option has been enabled which requires that
parameter. For example, the
<Demod: IF
– Sweep Time>
parameter is only visible if the
<Demod:
IF
– Sweep Mode>
is set to “Search”. These options are shown in the tables as gray to indicate this
status.
4.7.3.6.
Can I control the far end modem from the front panel of a local modem?
The M7 has the ability to control the far end modem (when linked and locked) from a local modem,
but only using the remote control port. This ability requires enabling the Multiplexer option. Control
from the front panel is prone to possible mistakes that would lead to accidentally setting the remote
modem in a state that could not be recovered without going to the remote site.
4.7.3.7.
The far right “Remote” LED is blinking. What does it mean?
The Unit Remote Activity parameters allow setting this lamp to blink when activity is detected on the
USB or serial remote control ports. The same
is possible for the “Local” LED using the Unit Keyboard
Activity control.
4.7.3.8.
I seem to have no modulator or demodulator functions available?
There are two reasons that could explain this. First, there are some units sold with only one function
installed for special purposes. These units would have a model number indicating this such as PST
for a Modulator transmit only or PSD indicating a Demodulator receive only.
The other reason could be that the Modulator or Demodulator is disabled. To check and enable if
desired, go to the
<Unit: Config
– Modem>
.parameter which shows what is enabled and allows
changing.
4.7.3.9.
What do the abbreviations on the front panel and in the manual mean?
See the abbreviations in FAQ Section E below.
4.7.4.
Remote Control
4.7.4.1.
Where is the ASCII Control packet structure in the M7?
The M7 and the PSM-4900 modems do not have an ASCII control packet protocol, only the binary
packet protocol. The SnIP however does have a fairly complete command line driven control method
via the “M7ctl” program. In addition the SnIP can potentially control multiple modems connected via
its external RS-485 control port.
4.7.4.2.
Can I use the USB connector at J10 to remotely control the M7?
The USB connector is mainly intended for firmware updates requiring a faster speed than the RS-
232/449 connection can supply. It is possible to control the modem in binary packet mode via the
USB connection. However, this connection does not use or accept addresses in the packet structure,
so it will likely require re-writing your packet routines.
You cannot currently use the USB connection for “Terminal Mode” control.
4.7.4.3.
Is there a “compatibility” mode for the remote control binary packet protocol that
looks like that in the PSM-4900?
Yes. The new M7 design dictated a new structure to implement the significantly greater number of
commands available in the M7. Many items such as the interface structure, data rates and available
options are so different that creating a compatible command set was impossible. However the M7
actually contains both its own and a copy of the PSM-4900 protocol, allowing the M7 to accept and
respond to PSM-4900 packets within the limitations of the PSM-4900 capabilities. This allows mixed
systems of 4900 and 500 series modems without initially changing control software. The compatibility
does not currently extend to operation over the link on the MCC channel.
4.7.4.4.
Is there a “compatibility” mode for the remote control binary packet protocol that
looks like that in the PSM-2100?
No. The new commands dictated a new structure to implement the significantly greater number of
commands available in the M7. Many items such as the interface structure, data rates and available
Содержание M7 Series
Страница 2: ...This page is intentionally blank ...
Страница 10: ......
Страница 56: ......
Страница 66: ...Maintenance M7 M7L M7LT Modular Satellite Modem 3 10 M7 M7L M7LT Rev 0 05 Figure 3 8 Unit Events Log Page ...
Страница 170: ......