Anritsu MS2665C - Reference Oscillator Frequency Stability

SECTION 6 PERFORMANCE TESTS
6-7
Reference oscillator frequency stability
The 10 MHz reference oscillator is tested for frequency stability.
In case of MS2665C, 10 MHz reference oscillator is option 01.
Stability is determined by measuring frequency variation after 24 hours and after 48 hours of power on at
ambient temperatures of 0°C and 50°C.
In case of MS2665C, if a device is not to mount Option 01, this test is not available since there is no 10 MHz
reference buffer output.
(1) Specifications
■ Reference oscillator
• Frequency: 10 MHz
• Aging rate: ≤ ±2×10
–8
/day
After 24 hour warm-up at 25˚C ±5˚C
• Temperature stability: ≤ ±5×10
–8
at 0 and 50˚C referred to frequency at 25˚C
(2) Test instruments
• Frequency counter: MF1601A
• Frequency standard: with stability of ≤ ±1×10
–9
/day
(3) Setup
OUTPUT
Frequency standard
FREQ STD
10 MHz IN
INPUT
Frequency cunter
MF1601A
10 MHz STD
Buff Out
WARNING
Off
Line Input 330VA Max
47.5
−
63Hz
On
CAUTION
RS
−
232C
9 pins
∗
Freq Adj.
Trig/Gate In
(–10V)
Phone
IF Out (10.69MHz)
SWP Status(Z)Video(Y)Sweep(X)
TTL0
−
0.5V0
−
10V
Composite Out
7.5Ω
10MHz STD
Ref In Buff Out
0dBm >2Vp-p
100
−
120V T5A
200
−
240V T5A
OPT15
OPT15
OPT01
OPT07
OPT06
Reference Oscillator Frequency Stability Test