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Commands
Abbreviated ASCII Syntax:
EXTERNALCLOCK
Field
Field
Type
1
header
2
clocktype
3
freq
4
h0
5
h1
6
h2
ASCII Example:
EXTERNALCLOCK DISABLE
or
EXTERNALCLOCK USER 10MHZ 1.0167E-23 6.87621E-25 8.1762E-26
or
EXTERNALCLOCK TCXO 5MHZ
ASCII
DISABLE
TCXO
OCXO
RUBIDIUM
CESIUM
USER
VCTCXO
OCXO
Rubidium
Cesium
EuroPak-15a Receiver User Manual Rev 5
CLOCKTYPE
[ FREQ ][ h0 [ h1 [ h2 ]]]
ASCII
Binary
Value
Value
This field contains the Abbreviated ASCII command name.
Section 4.1 on Page 31.
See Table 24 on
Clock type
Page 55
0MHz
0
Optional frequency. If a value is not
specified, the default is 5 MHz.
5MHz
1
10MHz
2
20MHz
3
1.0 e-31 to 1.0 e-18
Optional timing standards. These
fields are only valid when the USER
1.0 e-31 to 1.0 e-18
clocktype is selected.
1.0 e-31 to 1.0 e-18
Table 24: Clock Type
Binary
0
Turns the external clock input off, reverts back to the on-board VCTCXO
1
Sets the pre-defined values for a VCTCXO
2
Sets the pre-defined values for an OCXO
3
Sets the pre-defined values for a rubidium oscillator
4
Sets the pre-defined values for a cesium oscillator
5
Defines custom process noise elements
Table 25: Pre-Defined Values for Oscillators
h
Clock Type
1.0 e-21
2.51 e-26
1.0 e-23
2.0 e-20
Description
Description
h
0
-1
1.0 e-20
2.51 e-23
1.0 e-22
7.0 e-23
Chapter 5
Message ID: 230
Binary
Binary
Binary
Format
Bytes
Offset
H
0
See
Enum
4
H
Enum
4
H+4
Double
8
H+8
Double
8
H+16
Double
8
H+24
h
-2
1.0 e-20
2.51 e-22
1.3 e-26
4.0 e-29
55
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