Symmetricom 5401 User Manual
Operating Manual
Specifications
PN 8500-0150, Rev. A, May 2005
28
Coherence
a
The 1 PPS OUT time delay is < 10 nanoseconds from the
mean of the 1 PPS Input
mean of the 1 PPS Input
Port to Port Isolation
90 dB
Isolation (with respect to 1 PPS
input)
input)
90 dB
DRO 10 MHz Output Type
5401: Isolated SMA (J7-J12)
5402: Isolated SMA (J10-J15)
The DRO outputs 10 MHz signals with the following characteristics (After a 30 minute
warm-up at an ambient temperature of 25ºC):
warm-up at an ambient temperature of 25ºC):
Level
1.6 to 3.0 volts peak-to-peak (adjustable)
Output Impedance
50
Ω
Short Term Accuracy
3.0 x 10-11 RMS @ 1 second
Long Term Accuracy
5 x 10-12 RMS @ 1000 seconds (while disciplining)
Stability
2.5 x 10-12 Alan Deviation @ 100 seconds
Quiescent Phase Noise
Symmetricom 5401
Symmetricom 5402
1 Hz
< –94 dBc/Hz
< –85 dBc/Hz
10 Hz
< –110 dBc/Hz
< –100 dBc/Hz
100 Hz
< –140 dBc/Hz
< –130 dBc/Hz
1000 Hz
< –147 dBc/Hz
< –140 dBc/Hz
10 kHz
< –152 dBc/Hz
< –145 dBc/Hz
Spurs
Symmetricom 5401
Symmetricom 5402
Harmonic
40 dBc
40 dBc
Non-Harmonic
50 dBc
50 dBc
Port to Port Isolation
> 99 dB
> 99 dB
Coherence
2 nanoseconds (zero crossing of the 10 MHz sine wave with
respect to the rising edge of the 1 PPS output.)
respect to the rising edge of the 1 PPS output.)
a
The setup parameters have an effect on the coherence. Refer to the RS232 I/O de-
scription in
. Port to Port Isolation 90 dB Isolation (with respect to 1 PPS in-
put) 90 dB.
Table 5 Output Specifications and Characteristics (Continued)