Comtech EF Data CDM-760, Installation And Operation Manual

Page: 272 / 441

Serial Interface Operation Revision 3
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
8–29
8.5.8 PIIC Interface Parameters
Parameter Type
Controller-to-Target
Instruction Code and
Qualifier
Arguments for
Command or
Query
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 to 57)
Target-to-Controller
(see Description of Arguments)
Command Query
Response to
Command
Response to
Query
Rx Interface Clock
source
RCK= RCK?s 2 bytes Command or Query.
Sets or returns Rx Clock Source (for Data Rate accuracy) in the form sx, where:
s=Interface Slot, where:
1=Slot 1
2=Slot 2
x=Rx Clock Source, where:
0=Tx Clock
1=External Clock (not valid for OC3 interface)
2=Rx Sat
3=Internal Clock
NOTE: In MultiStream Mode, RCK is forced to internal clock.
EXAMPLE: <0/RCK=12 (Slot 1, Rx Sat Clock is selected)
RCK=
RCK?
RCK *
RCK #
RCK=x
Tx Interface Clock
source
TCK= TCK?s 2 bytes Command or Query.
Sets or returns Tx Clock Source (for Data Rate accuracy), where:
s=Interface Slot, where:
1=Slot 1
2=Slot 2
x=Rx Clock Source, where:
0=Tx Clock
1=External Clock (not valid for OC3 interface)
2=Rx Sat
EXAMPLE: <0/TCK=10 (Slot 1, Tx Clock is selected)
TCK=
TCK?
TCK *
TCK #
TCK=x
Interface
Reference
Clock
EFI= EFI?s 2 bytes Command or Query.
(G.703 interface only) Sets or returns External Clock (Interface) in the form sx, where:
s=Interface Slot, where:
1=Slot 1
2=Slot 2
x=EXT CLK (Data Rate Accuracy), where:
0=1 MHz
1=2 MHz
2=5 MHz
3=10 MHz
4=20 MHz
5=34.368 MHz
6=44.736 MHz
7=51.840 MHz
NOTE: For selections 5-7, the PIIC must be set to the corresponding interface type – i.e., 5 is valid when PIIC is in E3
mode, 6 is valid when PIIC is in T3 mode, and 7 is valid when PIIC is in STS1 mode.
EXAMPLE: <0/EFI=14 (Selects 10MHz on Slot 1)
EFI=
EFI?
EFI *
EFI #
EFI=x