|
SPEC.
|
|
Output
frequencies
|
10 MHz sine, 5 MHz sine, 10 ms wide 1 pps pulse
|
|
10 MHz / 5 MHz amplitude
|
0.5 Vrms, ±10% (1.41 Vpp or +7 dBm)
|
|
1pps pulse amplitude
|
2.5 V into 50W, 5 V into HiZ
|
|
Phase noise (SSB)
|
<-130
dBc/Hz (10 Hz)
<-140 dBc/Hz (100 Hz)
<-150 dBc/Hz (1 kHz)
<-155 dBc/Hz
(10 kHz)
|
|
Spurious
|
<-100 dBc (100 kHz BW)
|
|
Harmonics
|
<-60 dBc
|
|
Accuracy at shipment
|
±5 x 10-11
|
|
Aging (after 30 days)
|
<5 x 10-11
(monthly)
<5
x 10-10 (yearly)
5
x 10-9 (20 years,
typical)
|
|
Short term stability
(Allan variance)
|
<2 x 10-11
(1 s)
<1
x 10-11 (10
s)
<2 x 10-12 (100
s)
|
|
Holdover
|
72 hour Stratum 1 level (1 x
10-11)
|
|
Frequency retrace
|
±5 x 10-11
(72 hrs off, then 72 hrs on)
|
|
Settability
|
<5 x 10-12
|
|
Trim range
|
±2 x 10-9
(0 to 5 VDC)
±0.5 ppm (via RS-232)
|
|
Warm-up time
|
<6
minutes (time to lock)
<7 minutes (time to 1 x 10-9)
|
|
Front Panel Indicators (Green LEDs)
|
|
Power
|
"On" when AC power is applied
|
|
Locked
|
"On" when frequency is locked to rubidium
|
|
1pps input
|
Blinks with each 1 pps reference input applied to rear
panel
|
|
1pps sync
|
"On" when 1 pps output is synchronized within ±1 ms of
1pps
input
|
|
Receive
|
Blinks "on" when RS-232 characters are received by
FS725
|
|
Send
|
Blinks "on" when RS-232 characters are sent by
FS725
|
|
Rear Panel Connections
|
|
Frequency Adjust
|
0-5 VDC to adjust frequency by +/- 0.002 ppm
(normally
unconnected)
|
|
1 pps input
|
One 100 kW input. Requires
CMOS level pulses
(0 to 5 VDC). If an external 1 pps input is applied, lock is
maintained between the 1 pps input and 1 pps output with
computer adjustable
time constant from 8 minutes to 18
hours.
|
|
10 MHz outputs
|
Two 50 W isolated 10 MHz
sine outputs
|
|
5 MHz output
|
One 50 W, 5 MHz sine
output
|
|
1 pps output
|
One 50 W pulse output.
|
|
Optional outputs
|
Each option board provides four 10 MHz, one 5 MHz and
one 1 pps outputs.
Up to 3 boards may installed.
|
|
Alarm relays
|
Max current, 3 A. SPDT, normally open or normally
closed. May be wired
in parallel with other relays to
"wire-or" a single alarm.
|
|
Rb lock
|
Relay status matches the front panel "Locked" LED.
|
|
1 pps
|
Relay
status matches the front panel "1 pps sync" LED
|
|
RS-232
|
9 pin connector configured as DCE, 9600 baud.
Windows RbMon Software is
provided.
|
|
Environmental
|
|
Operating temperature
|
+10 °C to +40 °C
|
|
Temperature stability
|
Df/f <±1
´ 10-10
(+10 °C to +40 °C)
|
|
Storage temperature
|
-55 °C to +85 °C
|
|
Magnetic field
|
Df/f <2
´ 10-10
for 1 Gauss field reversal
|
|
Relative humidity
|
95% (non-condensing)
|
|
General
|
|
AC power
|
90 to
132 VAC or 175 to 264 VAC, 47 to 63 Hz, 50 Watts
|
|
Dimensions
|
8.5"´3.5"´13" (WHL)
|
|
Weight
|
9 lbs
|
|
Warranty
|
One year parts and labor on materials and workmanship
|
Catalog
Manual