Service manual

Service Manual SD170E Series
Page 12 of 44
Reference Crystal
VHF
UHF
Model Series
SD-171E
SD-174E
Frequency
12.8 MHz
Type
DV-5-2.5H1
Temperature
Characteristic
±2.5 ppm from -30° C to +60° C
Aging Rate
< 2 ppm/ year in 1st year
< 1 ppm/ year thereafter
Enviromental
VHF
UHF
Model Series :
SD-171E
SD-174E
Temperature (deg C)
Operating
Storage
-30° to +60° C Degradation Specified @ Extreme condition
-40° to +80° C
ESD
20 KV
 Due to continuing research and development the company reserves the right to alter
these specifications without prior notice.
Dimensions
Dimensions: 122mm (L) x 62mm (W) x 35mm (D)
Fig 3. Dimensions
R
R
R
e
e
e
f
f
f
e
e
e
r
r
r
e
e
e
n
n
n
c
c
c
e
e
e
X
X
X
t
t
t
a
a
a
l
l
l
,
,
,
D
D
D
i
i
i
m
m
m
e
e
e
n
n
n
s
s
s
i
i
i
o
o
o
n
n
n
S
S
S
p
p
p
e
e
e
c
c
c
i
i
i
f
f
f
i
i
i
c
c
c
a
a
a
t
t
t
i
i
i
o
o
o
n
n
n