Anritsu MT8820A - Frequency Stability for Reference Oscillator

9.1 Performance Test
9-5
9.1.4 Frequency stability for reference oscillator
This section explains test method for frequency stability of the 10 MHz crystal os-
cillator the reference oscillator of MT8820A. For frequency stability, measure the
frequency change at 24 hours after turning the power On and at the ambient tem-
peratures of 0°C and 50°C.
(1) Test object specifications
Table 9-1-4-1 Specifications for reference oscillator
Item Specifications
Frequency 10 MHz
Activation
characteristics
≤±5×10
-8
(At 10 minites after power-On, references the 24 hours
after power-On)
Aging rate ≤±2×10
-8
/day
(Referencing the 24 hours after power-on)
Temperature stability ≤±5×10
-8
(0 to 50°C, referencing 25°C)
(2) Setup
Connect the equipment as shown in the figure below. Connect 10 MHz Buff
Out reference signal output connector to 10 MHz reference input connector of
frequency counter on the MT8820A rear panel.
Frequency standard
e
q
ui
p
ment
10 MHz
REF In
p
ut
Out
p
ut
MF2412B
Frequency counter
MT8820A
Rear panel
10 MHz
Buffered Out
p
ut
Fig. 9-1-4-1 Setting up the frequency stability test for reference oscillator