Comtech EF Data CDM-625A - Manual (Page 136)

CDM-625A Advanced Satellite Modem MN-CDM625A
Front Panel Operation Revision 3
6–10
6.2.1.2 CONFIG: Mode
MODE is a key parameter when configuring the modem. To simplify the menu
selections, you must first determine the INTERFACE and FRAMING type for both
Transmit and Receive. Once these have been selected, you are presented only with
menu selections that are applicable to those particular modes. For example:
• When you select a G.703 interface, the data rate menu is restricted to only the
appropriate G.703 rates.
• When you select an IDR framing mode, the data rate selections are limited to
only those rates specified by IESS-308.
Mode:Tx=RS422 :NONE Rx=RS422 :None
(422,V35,G703s,Audio,LVDS,HSSI,IP,ASI)
This screen example depicts an Interface Type menu screen. You may select Interface Type and
Framing for both Tx and Rx from this menu. Use the ◄ ► arrow keys to select the parameter to
edit. The bottom line indicates the available options for the active parameter. Not all options
are always available – they depend on other settings or on the modem’s activated FAST options.
The first parameter is the Interface Type. Available options are:
► IP ► RS422 ►V.35
► ASI ► G.703x: ►Audio
► IP-ACM • G.703B (Balanced) ► LVDS
► V2-ACM (VersaFEC-2) • G.703U (Unbalanced) ► HSSI
Use the ▲▼ arrow keys to scroll through the available options. Press ENTER.
If the cursor is on the second parameter – the Framing Type – the display appears as shown:
Mode:Tx=RS422 :NONE Rx=RS422 :None
(None IBS IDR D&Is EDMACs ESV++)
Interface Notes:
1) The IP-ACM and V2-ACM mode choices limit available framing types to NONE or EDMAC.
Appendix M. ADAPTIVE CODING AND MODULATION (ACM)
2) The list of available Interface Types includes Audio when a unit ships with the Two Channel
Audio Drop Hardware Option installed. The Audio mode choice permits you to carry 2 x 32
kbps ADPCM audio as the primary data. This mode restricts the available framing types to
IBS or EDMAC (see the selection table and the explanations on the next page).
Use the ▲▼ arrow keys to scroll through the available options. Press ENTER.