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Commands
Chapter 5
EuroPak-15a Receiver User Manual Rev 5
55
Abbreviated ASCII Syntax:
Message ID: 230
ASCII Example:
EXTERNALCLOCK DISABLE
or
EXTERNALCLOCK USER 10MHZ 1.0167E-23 6.87621E-25 8.1762E-26
or
EXTERNALCLOCK TCXO 5MHZ
Table 24: Clock Type
Table 25: Pre-Defined Values for Oscillators
EXTERNALCLOCK
CLOCKTYPE
[ FREQ ][ h0 [ h1 [ h2 ]]]
Field
Field
Type
ASCII
Value
Binary
Value
Description
Binary
Format
Binary
Bytes
Binary
Offset
1
header
This field contains the
Abbreviated ASCII
command name.
See
.
H
0
2
clocktype
See
Clock type
Enum
4
H
3
freq
0MHz
0
Optional frequency. If a value is not
specified, the default is 5 MHz.
Enum
4
H+4
5MHz
1
10MHz
2
20MHz
3
4
h0
1.0 e-31 to 1.0 e-18
Optional timing standards. These
fields are only valid when the USER
clocktype is selected.
Double
8
H+8
5
h1
1.0 e-31 to 1.0 e-18
Double
8
H+16
6
h2
1.0 e-31 to 1.0 e-18
Double
8
H+24
ASCII
Binary
Description
DISABLE
0
Turns the external clock input off, reverts back to the on-board VCTCXO
TCXO
1
Sets the pre-defined values for a VCTCXO
OCXO
2
Sets the pre-defined values for an OCXO
RUBIDIUM
3
Sets the pre-defined values for a rubidium oscillator
CESIUM
4
Sets the pre-defined values for a cesium oscillator
USER
5
Defines custom process noise elements
Clock Type
h
0
h
-1
h
-2
VCTCXO
1.0 e-21
1.0 e-20
1.0 e-20
OCXO
2.51 e-26
2.51 e-23
2.51 e-22
Rubidium
1.0 e-23
1.0 e-22
1.3 e-26
Cesium
2.0 e-20
7.0 e-23
4.0 e-29