Users manual
NR3700-O/G
Revision #:
A
Date:
9-13-16
Page #:
6 of 19
Over a broad temperature range, an AT performs very well and much easier to
compensate electronically. It is also a simpler crystal to manufacture than a SC cut
device. For applications where a stability of a few ppm is acceptable, a TCXO can be a
cost effective alternative.
The SC cut results in a much higher Q device and achieves much lower phase noise
than the AT cut. Due to the SC cut being sensitive to pressure and temperature
variation, it is mounted in a temperature controlled hermetic chamber.
OCXO oven temperature is in the range of 90°C. The device heats up and becomes
stable within ~ 5 minutes.
OCXO Frequency Error from cold start
-1.60E+02
-1.40E+02
-1.20E+02
-1.00E+02
-8.00E+01
-6.00E+01
-4.00E+01
-2.00E+01
0.00E+00
2.00E+01
1
11
21
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
Er
ro
r
in
H
z
Time in seconds
Frequency Error 1 to 250 seconds
