23
DIAGNOSTIC DATA
Table 8.8.
Failure code
Failure types
Y
1
Y
2
0
X
Maser is in order
1
Z
Maser is fault
1
0
No time scale
1
1
No AFC lock
1
2
No signal from the multiplier 5
–
100 MHz
1
3
20.4 MHz or digital synthesizer is fault
1
4
Oven temperature is above or below normal
1
5
No HF discharge
1
6
Purifier is fault
1
7
No hydrogen
1
8
Low vacuum in Hydrogen Discriminator vacuum system
1
9
No 5 MHz output signal from the crystal oscillator
Note: X
–
any state; Z
–
digit from 0 to 9.
4). SR signal is applied to GPIB:
when where are error signal in the Maser.
5). The Maser CH1
–
76A Status Byte Output GPIB in accordance with Table 8.9.
STATUS BYTE OUTPUT
Table 8.9
Cause
Status Byte Output
DI7
DI6
DI5
DI4
DI3
DI2
DI1
DI0
The Maser is in
order
0
0
0
0
0
0
0
0
The Maser is fault
0
1
1
0
0
0
0
1
Содержание CH1-76A
Страница 2: ...2 Fig 1 The CH1 76A Passive Hydrogen Maser ...
Страница 8: ...8 Fig 5 1 The Maser CHI 76A Simplified Block Diagram ...
Страница 9: ...9 Fig 5 2 The Maser CH1 76A Detail Block Diagram ...
Страница 12: ...12 Fig 6 1 The Maser CH1 76A Package Design ...
Страница 14: ...14 Fig 7 1 The Maser CH1 76A Front A and Rear B Panel ...
Страница 26: ...26 Fig 10 1 The Maser CH1 76A Accessory Kit ...
