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參數(shù)資料
| 型號： | QEM77-AH |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 3/7頁 |
| 文件大?。?/td> | 105K |
| 代理商： | QEM77-AH |
QEM77-AH
41 x 41 mm / 19 pins
MCXO
Operating Procedure
SALES OFFICES:
Benelux:
+33 (0) 1 46 90 23 00 /
Germany:
+49 (0)
89 820 796-27
/
Nordic:
+46 (0) 8 59030300
France:
+33 (0) 1 46 90 23 00 /
Italy:
+39 (0) 738 8869 /
Spain:
+33 (0) 1 46 90 23 00 /
UK:
+44 (0) 1256 883340
USA:
+1 (623) 780-1995 /
Asia-Pacific
: +33 (0) 5 56 46 66 84
WEB SITE: http://www.temex-components.com
Specifications are subject to change without notice - Page 3 / 7
TEMEX
TIME &
FREQUENCY
QEM77AH
04-05-2001
Secundary functions
Logic levels
on dedicated inputs
Byte value
on pin 13
RS232 port
$EF
Action
delay
Result
PD1=
″
0
″
and PD2 =
″
0
″
FMCXO = 10 MHz
Output frequency
selection (FMCXO)
PD1=
″
1
″
and PD2 =
″
0
″
$EF
FMCXO = 5MHz
PD1=
″
0
″
and PD2 =
″
1
″
$FD
300 ms
FMCXO = 1MHz
PD1=
″
1
″
and PD2 =
″
1
″
Synchronization
of FM1 on FM2
PD5 =
″
1
″
$FC
synch enable
PD5=
″
0
″
$CF
synch disable
Switching between normal
and
PD6 =
″
1
″
$CA
1s
disable
stand-by modes
PD6=
″
0
″
$AC
4s
enable
Phase measurement
PD7 =
″
0
″
n.a.
1s
disable
φ
(FM1, FM2)
PD7 =
″
1
″
n.a.
1s
enable
$BF
increases FMCXO by 1 ppm
$FB
decreases FMCXO by 1ppm
$AB+3 bytes
300 ms
acquisition
time
increases FMCXO
proportionally to the 3 bytes
following $AB
decreases FMCXO
proportionally to the 3 bytes
following $BA
adds a positive frequency offset to FMCXO
proportional to the 3 bytes following $BC
adds a negative frequency offset to FMCXO
proportional to the 3 bytes following $CB
cancels every software change, except those
performed by $BC or $CB
returns FMCXO to factory setting
Digital frequency
adjustment
through RS232 port
(see next page)
$BA+3 bytes
$BC+3 bytes
$CB+3 bytes
$BD
$BB
I mportant notice
: I t is recommended that any action initiated through a dedicated input modified or cancelled by an other
action on a dedicated input. The same is true for commands issued on the RS232 port.
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