20
Parameter
Specification value
Measured value
5. Clock Synchronization
to within 200 ns of Reference Pulse:
Sync pulse
Amplitude
2.5
–
5V
Width
1
–
100
s
Rise Time
< 100 ns
Input Impedance
50 Ohms
Time Reference
Rising edge
6. Power Requirements**
Input voltage
AC
100, 120, 220V
10 %, 240V
5 %,
45 to 65 Hz
DC (external)
+22 to +30V
Power Consumption
AC
< 140 VA
DC
< 90W
Emergency Automatic
Switch to DC Verified
Warm-Up Time
< 10 hours
7. Environmental
Temperature:
Operating
+5
C to +40
C
Non-operating
–
0
C to +50
C
Humidity
Operating
to 80% at +25
C
Non
–
operating
to 98% at +25
C
Atmospheric Pressure
Operating
84
–
106 kPa
(630
–
795 mm Hg)
Non
–
operating
12
–
106 kPa
(90
–
795 mm Hg)
8. Physical:
Dimensions
Without package
280
480
555 mm
(11"
19"
22")
In package case
682
730
800 mm
(27"
29"
31")
Weight:
Without package
55 kg (120 lbs)
In package case
105 kg (230 lbs)
9. Warranty
27 months
10. MTBF
9000 hours
11. Service Life
15 years
* Specified only under laboratory conditions:
at
1
C ambient temperature change in operating temperature range;
humidity 30% to 80%.
** In case of an emergency the Maser automatically switches to the External DC power 22 to
+30V.
Summary of Contents for CH1-76A
Page 2: ...2 Fig 1 The CH1 76A Passive Hydrogen Maser ...
Page 8: ...8 Fig 5 1 The Maser CHI 76A Simplified Block Diagram ...
Page 9: ...9 Fig 5 2 The Maser CH1 76A Detail Block Diagram ...
Page 12: ...12 Fig 6 1 The Maser CH1 76A Package Design ...
Page 14: ...14 Fig 7 1 The Maser CH1 76A Front A and Rear B Panel ...